{"id":1557,"date":"2022-09-15T10:36:13","date_gmt":"2022-09-15T10:36:13","guid":{"rendered":"http:\/\/kiennguyen900.123websitedemo.com\/?p=1557"},"modified":"2022-09-23T10:17:48","modified_gmt":"2022-09-23T10:17:48","slug":"da-kien-nguyen-02","status":"publish","type":"post","link":"https:\/\/kiennguyen900.com\/en\/da-kien-nguyen-02\/","title":{"rendered":"QUY C\u00c1CH \u0110\u1eccC C\u00c1C K\u00dd HI\u1ec6U TR\u00caN \u0110\u00c1 M\u00c0I"},"content":{"rendered":"

C\u00e1ch \u0111\u1ecdc k\u00fd hi\u1ec7u tr\u00ean \u0111\u00e1 m\u00e0i<\/strong><\/p>\n\n\n

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\"\"<\/figure><\/div>\n\n\n

Ph\u1ea9n l\u1edbn c\u00e1c \u0111\u0129a m\u00e0i ch\u1ee9a h\u1ea1t m\u00e0i b\u1eb1ng b\u1ed9t m\u00e0i (coridon) (tr\u1eafng, h\u1ed5ng) hay silicium cacbit (xanh,\u0111en). \u0110\u1ed9 d\u1ebbo dai c\u1ee7a h\u1ea1t gi\u1ea3m v\u1edbi \u0111\u1ed9 c\u1ee9ng t\u0103ng c\u1ee7a h\u1ea1t m\u00e0i. H\u1ea1t m\u00e0i c\u1ee9ng gi\u00f2n l\u00fac ch\u1ecbu t\u1ea3i nh\u1ecf (m\u00e0i tinh) c\u00f3 kh\u1ea3 n\u0103ng t\u1ef1 l\u00e0m s\u1eafc qua h\u1ea1t v\u0103ng t\u00e1ch ra. M\u1ed9t \u0111\u1ed9 dai \u0111\u1ea9y \u0111\u1ee7 \u1edf h\u1ea1t ch\u1ecbu t\u1ea3i l\u1edbn (m\u00e0i th\u00f4) ng\u0103n ch\u1eb7n s\u1ef1 v\u1ee1 h\u1ea1t s\u1edbm.<\/p>\n\n\n\n

H\u1ea1t m\u00e0i n\u00ean c\u00f3 \u0111\u1ed9 c\u1ee9ng cao c\u0169ng nh\u01b0 \u0111\u1ed9 dai \u0111\u1ee7 v\u00e0 s\u1ee9c b\u1ec1n nhi\u1ec7t.<\/p>\n\n\n\n\n \n \n \n \n \n \n \n
B\u1ea3ng 1: C\u00e1c lo\u1ea1i v\u1eadt li\u1ec7u m\u00e0i<\/th>\n <\/tr>\n
K\u00fd hi\u1ec7u<\/th>\n V\u1eadt li\u1ec7u m\u00e0i<\/th>\n \u0110\u1ed9 c\u1ee9ng Knoop* N\/mm2<\/th>\n \u0110\u1ed9 b\u1ec3n nhi\u1ec7t \u0111\u1ebfn<\/th>\n Nh\u1eefng l\u0129nh v\u1ef1c \u1ee9ng d\u1ee5ng<\/th>\n <\/tr>\n
A<\/td>\n Coridon th\u01b0\u1eddng (Al203)<\/td>\n 18000<\/td>\n Silicium cacbit (SiC)<\/td>\n Th\u00e9p kh\u00f4ng h\u1ee3p kim, th\u00e9p kh\u00f4ng t\u00f4i c\u1ee9ng, th\u00e9p \u0111\u00fac, gang d\u1ebbo)<\/td>\n <\/tr>\n
Coridon tinh khi\u1ebft (Al203)<\/td>\n 21000<\/td>\n Th\u00e9p h\u1ee3p kim cao v\u00e0 th\u00e9p h\u1ee3p kim th\u1ea5p, th\u00e9p t\u00f4i c\u1ee9ng, th\u00e9p th\u1ea5m than, th\u00e9p d\u1ee5ng c\u1ee5, titan<\/td>\n <\/tr>\n
c<\/td>\n Silicium cacbit (SiC)<\/td>\n 24800<\/td>\n 1370\u00b0c<\/td>\n V\u1eadt li\u1ec7u c\u1ee9ng: h\u1ee3p kim c\u1ee9ng, gang, th\u00e9p gi\u00f3, g\u1ed1m, th\u1ee7y tinh,v\u1eadt li\u1ec7u m\u1ec1m: \u0111\u1ed5ng, nh\u00f4m, ch\u1ea5t d\u1ebbo<\/td>\n <\/tr>\n
CBN<\/td>\n Bor nitr\u00edt (BN)<\/td>\n 60000<\/td>\n 1200\u00b0c<\/td>\n Th\u00e9p gi\u00f3, th\u00e9p c\u00e1n n\u00f3ng v\u00e0 th\u00e9p c\u00e1n ngu\u1ed9i<\/td>\n <\/tr>\n
D<\/td>\n Kim c\u01b0\u01a1ng (C)<\/td>\n 70000<\/td>\n 800\u00b0c<\/td>\n H\u1ee3p kim c\u1ee9ng, gang, th\u1ee7y tinh, g\u1ed1m, \u0111\u00e1, kim lo\u1ea1i kh\u00f4ng ch\u1ee9a s\u1eaft, kh\u00f4ng d\u00e0nh cho th\u00e9p, li\u1ebfc \u0111\u0129a \u0111\u00e1 m\u00e0i<\/td>\n <\/tr>\n<\/table>\n

*Theo KOOP chi\u1ec1u s\u00e2u \u0103n v\u00e0o \u0111\u01b0\u1ee3c \u0111o v\u1edbi m\u1ed9t h\u00ecnh th\u00e1p b\u1eb1ng kim c\u01b0\u01a1ng v\u1edbi g\u00f3c m\u1edf 172,5\u00b0v\u00e0 200\u00b0<\/p>\n\n\n\n

M\u00e0i m\u00f2n \u1edf h\u1ea1t m\u00e0i<\/strong><\/p>\n\n\n

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\"\"<\/figure><\/div>\n\n\n

L\u1ef1c c\u1eaft cao l\u00e0m t\u0103ng tr\u1ed9i vi\u1ec7c \u0111\u1eadp v\u1ee5n v\u00e0 s\u1ef1 ph\u00e1 v\u1ee1 c\u1ee7a h\u1ea1t kh\u1ecfi s\u1ef1 k\u1ebft d\u00ednh, \u1edf l\u1ef1c c\u1eaft nh\u1ecf khi m\u00f2n ma s\u00e1t n\u01a1i c\u1ea1nh c\u1eaft t\u0103ng d\u1ea7n m\u1edbi l\u00e0m t\u1ea3i \u1edf h\u1ea1t cao \u0111\u1ebfn n\u1ed7i l\u00e0m c\u00e1c h\u1ea1t nh\u1ecf b\u1ecb t\u00e1ch ra.<\/p>\n\n\n\n

Qua vi\u1ec7c t\u00e1ch ra v\u00e0 s\u1ef1 ph\u00e1 v\u1ee1 c\u1ee7a h\u1ea1t t\u1ea1o th\u00e0nh c\u1ea1nh c\u1eaft m\u1edbi. Do v\u1eady m\u00e0 \u0111\u00e1 m\u00e0i t\u1ef1 m\u00e0i s\u1eafc.<\/p>\n\n\n\n

C\u00e1c lo\u1ea1i h\u1ea1t<\/strong><\/p>\n\n\n\n

H\u1ea1t nh\u1ecdn ph\u00f9 h\u1ee3p v\u1edbi v\u1eadt li\u1ec7u t\u1ea1o phoi d\u00e0i. H\u1ea1t d\u1ea1ng kh\u1ed1i ch\u1ed1ng m\u00e0i m\u00f2n \u1edf v\u1eadt li\u1ec7u gi\u00f2n. H\u1ea1t tinh th\u1ec3 \u0111\u01a1n (m\u1ed9t h\u1ea1t tinh th\u1ec3) c\u00f3 \u0111\u1ed9 b\u1ec1n h\u1ea1t cao, n\u00f3 ph\u00f9 h\u1ee3p \u0111\u1ec3 m\u00e0i th\u1ee7y tinh v\u00e0 g\u1ed1m. H\u1ea1t \u0111a tinh th\u1ec3 l\u00fac m\u00e0i k\u1ebft th\u00e0nh nhi\u1ec1u h\u1ea1t c\u1eaft nh\u1ecf t\u1eeb h\u1ea1t qua s\u1ef1 t\u00e1ch vi t\u1ebf (mikro) tr\u01b0\u1edbc khi v\u1ee1 ho\u00e0n to\u00e0n. C\u00e1c h\u1ea1t do \u0111\u00f3 \u0111\u01b0\u1ee3c d\u00f9ng t\u1ed1t h\u01a1n khi m\u00e0i kim lo\u1ea1i c\u1ee9ng.<\/p>\n\n\n\n

C\u1ee1 h\u1ea1t<\/strong><\/p>\n\n\n\n

S\u1ed1 c\u1ee1 h\u1ea1t t\u01b0\u01a1ng \u1ee9ng v\u1edbi s\u1ed5 l\u1ed7 c\u1ee7a r\u00e2y tr\u00ean chi\u1ec1u d\u00e0i 1 inch, h\u1ea1t n\u00e0o \u0111\u00fang c\u1ee1 l\u1ecdt qua th\u1eb3ng xu\u1ed1ng r\u00e2y, trong khi m\u1ed9t s\u1ed1 h\u1ea1t kh\u00e1c k\u1eb9t l\u1ea1i \u1edf r\u00e2y h\u1eb9p k\u00ea\u2019 ti\u1ebfp. C\u1ee1 h\u1ea1t th\u1eadt m\u1ecbn \u0111\u01b0\u1ee3c t\u00e1ch ra b\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p l\u1eafng b\u00f9n. C\u1ee1 h\u1ea1t kim c\u01b0\u01a1ng v\u00e0 h\u1ea1t borit \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh theo r\u00e2y c\u1ee1 s\u00e0ng b\u1eb1ng um. C\u1ee1 h\u1ea1t v\u1edbi k\u00fd hi\u1ec7u D 150 (H\u1ea1t kim c\u01b0\u01a1ng) c\u0169ng nh\u01b0 B 150 (H\u1ea1t CBN) c\u00f3 \u0111\u1ed9 l\u1edbn h\u1ea1t trong kho\u1ea3ng t\u1eeb 125nm v\u00e0 150|xm.<\/p>\n\n\n\n\n \n \n \n \n \n
B\u1ea3ng 1: \u0110\u1ed9 c\u1ee9ng c\u1ee7a b\u00e1nh m\u00e0i<\/th>\n <\/tr>\n
C\u1ea5p \u0111\u1ed9 c\u1ee9ng<\/th>\n K\u00fd hi\u1ec7u<\/th>\n Khu v\u1ef1c \u1ee9ng d\u1ee5ng<\/th>\n <\/tr>\n <\/tr>\n
A, B, C,D E,F,G<\/td>\n c\u1ef1c m\u00e9m r\u1ea5t m\u00e9m<\/td>\n M\u00e0i s\u00e2u v\u00e0 m\u00e0i c\u1ea1nh c\u00e1c v\u1eadt li\u1ec7u <\/td>\n <\/tr>\n
H, l,J,K L, M, N, 0<\/td>\n trung b\u00ecnh m\u1ec1m<\/td>\n M\u00e0i klm lo\u1ea1i th\u00f4ng th\u01b0\u1eddng<\/td>\n <\/tr>\n
p, Q, R, s T, \u00d9, V, w X,Y,Z<\/td>\n c\u1ee9ng r\u1ea5t c\u1ee9ng c\u1ef1c c\u1ee9ng<\/td>\n M\u00e0i tr\u00f2n ngo\u00e0i, v\u1eadt <\/td>\n <\/tr>\n<\/table>\n\n\n\n

S\u1ef1 k\u1ebft d\u00ednh c\u1ee7a h\u1ea1t m\u00e0i<\/strong><\/p>\n\n\n\n\n \n \n \n \n \n \n \n
B\u1ea3ng 2: K\u1ebft d\u00ednh c\u1ee7a b\u00e1nh m\u00e0i<\/th>\n <\/tr>\n
D\u1ea5u hi\u1ec7u<\/th>\n Lo\u1ea1i k\u1ebft d\u00ednh<\/th>\n L\u0129nh v\u1ef1c \u1ee9ng d\u1ee5ng<\/th>\n <\/tr>\n <\/tr>\n
V<\/td>\n K\u00e9t d\u00ednh b\u1eb1ng g\u00f3m<\/td>\n M\u00e0i ph\u00e1 v\u00e0 m\u00e0i tinh th\u00e9p v\u1edbi corundum (b\u1ed9t m\u00e0i g\u1ed1c oxit nh\u00f4m) v\u00e0 silic cacbua<\/td>\n <\/tr>\n
BBF<\/td>\n K\u1ebft d\u00ednh v\u1edbi nh\u1ef1a t\u1ed5ng h\u1ee3p c\u00f3 s\u1ee3i gia c\u01b0\u1eddng<\/td>\n M\u00e0i th\u00f4 v\u00e0 m\u00e0i c\u1eaft \u0111\u1ee9t, m\u00e0i \u00e1p l\u1ef1c cao v\u1edbi corundum \u00e3ricon, m\u00e0i \u0111\u1ecbnh h\u00ecnh v\u1edbi kim c\u01b0\u01a1ng v\u00e0 bor nitrua<\/td>\n <\/tr>\n
M<\/td>\n K\u1ec3t d\u00ednh b\u1eb1ng kim lo\u1ea1i<\/td>\n M\u00e0i \u0111\u1ecbnh h\u00ecnh v\u00e0 m\u00e0i d\u1ee5ng c\u1ee5 v\u1edbi kim c\u01b0\u01a1ng hay bor nitrua (m\u00e0i \u01b0\u1edbt <\/td>\n <\/tr>\n
G<\/td>\n K\u1ebft d\u00ednh b\u1eb1ng ma \u0111i\u00ean<\/td>\n M\u00e0i l\u1ed7 trong c\u1ee7a kim lo\u1ea1i c\u1ee9ng, th\u00e9p gi\u00f3, m\u00e0i tay<\/td>\n <\/tr>\n
RF<\/td>\n K\u1ebft d\u00ednh b\u1eb1ng cao su v\u1edbi s\u1ee3i gia c\u01b0\u1eddng<\/td>\n \u0110\u0129a m\u00e0i c\u1eaft \u0110\u0129a m\u00e0i d\u1eabn <\/td>\n <\/tr>\n<\/table>\n\n\n\n

S\u1ef1 k\u1ebft d\u00ednh c\u00f3 m\u1ee5c \u0111\u00edch l\u00e0 gi\u1eef cho t\u1eebng h\u1ea1t ch\u1eb7t c\u1ee9ng v\u1edbi nhau \u0111\u1ebfn khi n\u00e0o c\u00f9n.<\/p>\n\n\n\n

\u0110\u0129a m\u00e0i k\u1ebft d\u00ednh b\u1eb1ng g\u1ed1m c\u00f3 nh\u1eefng bu\u1ed5ng b\u1ecdng v\u00e0 c\u00f3 th\u1ec3 d\u1ec5 s\u1eeda li\u1ebfc \u0111\u00e1. K\u1ebft d\u00ednh b\u1eb1ng nh\u1ef1a t\u1ed5ng h\u1ee3p gi\u1eef c\u00e1c h\u1ea1t ch\u1eb7t h\u01a1n, do \u0111\u00f3 g\u00e2y ra l\u1ef1c m\u00e0i cao h\u01a1n.Tuy nhi\u00ean nh\u1eefng h\u1ea1t nh\u1ecdn n\u1eb1m t\u1ef1 do gi\u00fap m\u00e0i m\u00e1t h\u01a1n (\u00edt nhi\u1ec7t h\u01a1n).<\/p>\n\n\n\n

\u0110\u1ed9 c\u1ee9ng c\u1ee7a b\u00e1nh m\u00e0i<\/strong><\/p>\n\n\n\n\n \n \n \n \n \n
B\u1ea3ng 1: \u0110\u1ed9 c\u1ee9ng c\u1ee7a b\u00e1nh m\u00e0i<\/th>\n <\/tr>\n
C\u1ea5p \u0111\u1ed9 c\u1ee9ng<\/th>\n K\u00fd hi\u1ec7u<\/th>\n Khu v\u1ef1c \u1ee9ng d\u1ee5ng<\/th>\n <\/tr>\n <\/tr>\n
A, B, C,D E,F,G<\/td>\n c\u1ef1c m\u00e9m r\u1ea5t m\u00e9m<\/td>\n M\u00e0i s\u00e2u v\u00e0 m\u00e0i c\u1ea1nh c\u00e1c v\u1eadt li\u1ec7u <\/td>\n <\/tr>\n
H, l,J,K L, M, N, 0<\/td>\n trung b\u00ecnh m\u1ec1m<\/td>\n M\u00e0i klm lo\u1ea1i th\u00f4ng th\u01b0\u1eddng<\/td>\n <\/tr>\n
p, Q, R, s T, \u00d9, V, w X,Y,Z<\/td>\n c\u1ee9ng r\u1ea5t c\u1ee9ng c\u1ef1c c\u1ee9ng<\/td>\n M\u00e0i tr\u00f2n ngo\u00e0i, v\u1eadt <\/td>\n <\/tr>\n<\/table>\n\n\n\n

Ng\u01b0\u1eddi ta hi\u1ec3u \u0111\u1ed9 c\u1ee9ng c\u1ee7a \u0111\u0129a m\u00e0i kh\u00f4ng ph\u1ea3i l\u00e0 \u0111\u1ed9 c\u1ee9ng c\u1ee7a h\u1ea1t m\u00e0i m\u00e0 l\u00e0 kh\u1ea3 n\u0103ng \u0111\u1ed1i kh\u00e1ng c\u1ee7a s\u1ef1 k\u1ebft d\u00ednh ch\u1ed1ng l\u1ea1i s\u1ef1 ph\u00e1 v\u1ee1 h\u1ea1t m\u00e0i.<\/p>\n\n\n\n

Trong ph\u01b0\u01a1ng ph\u00e1p m\u00e0i v\u1eadt li\u1ec7u c\u1ee9ng v\u1edbi m\u00e0i m\u00f2n v\u00ec ma s\u00e1t m\u1ea1nh nh\u01b0ng l\u1ef1c ch\u1ecbu t\u1ea3i c\u1ee7a h\u1ea1t nh\u1ecf, ta ch\u1ec9 c\u00f3 th\u1ec3 x\u00e1c \u0111\u1ecbnh ch\u1eafc ch\u1ea5n \u201chi\u1ec7u \u1ee9ng t\u1ef1 t\u00e1c \u0111\u1ed9ng m\u00e0i s\u1eafc\u201d qua \u0111\u0129a m\u00e0i m\u1ec1m. M\u00e0i v\u1eadt li\u1ec7u m\u1ec1m \u0111\u00f2i h\u1ecfi \u1edf phoi d\u00e0y m\u00f4t l\u1ef1c gi\u1eef h\u1ea1t i\u1edbn h\u01a1n, do \u0111\u00f3 \u0111\u0129a m\u00e0i c\u1ee9ng h\u01a1n.<\/p>\n\n\n\n

\u0110\u0129a m\u00e0i qu\u00e1 m\u1ec3m lu\u00f4n lu\u00f4n kh\u00f4ng hi\u1ec7u qu\u1ea3 kinh t\u1ebf v\u00ec \u0111\u1ed9 m\u00e0i m\u00f2n cao. Nh\u1eefng h\u1ea1t v\u1ee1 ra, tr\u01b0\u1edbc khi b\u1ec3 m\u1eb7t m\u00e0i m\u00f2n h\u00ecnh th\u00e0nh. \u0110\u0129a m\u00e0i b\u1ecb m\u1ea5t h\u00ecnh d\u1ea1ng (pr\u00f4fin) c\u1ee7a n\u00f3,\u201dv\u1ee1 to\u00e0n b\u1ed9\u201d. \u0110\u0129a qu\u00e1 c\u1ee9ng th\u00ec ng\u01b0\u1ee3c l\u1ea1i, n\u00f3 gi\u1eefch\u1eb7t h\u1ea1t r\u1ea5t l\u00e2u, tr\u01a1n (chai) v\u00e0 b\u00f3ng, \u0111\u1ed5ng th\u1eddi l\u00e0m t\u0103ng \u00e1p l\u1ef1c m\u00e0i v\u00e0 nhi\u1ec7t \u0111\u1ed9 \u1edf v\u00f9ng ti\u1ebfp x\u00fac. \u0110\u1ed9 c\u1ee9ng t\u00e1c \u0111\u1ed9ng c\u1ee7a m\u1ed9t \u0111\u0129a m\u00e0i trong qu\u00e1 tr\u00ecnh gia c\u00f4ng kh\u00f4ng ch\u1ec9 t\u00f9y thu\u1ed9c v\u00e0o \u0111\u1ed9 c\u1ee9ng m\u00e0 c\u00f2n \u1edf c\u1ee1 h\u1ea1t, kho\u1ea3ng tr\u1ed1ng (l\u1ed7 b\u1ecdng x\u1ed1p) v\u00e0 b\u1ec1 d\u00e0y phoi (H\u00ecnh 1).<\/p>\n\n\n\n

Quy t\u1eafc l\u00e0m vi\u1ec7c<\/strong><\/p>\n\n\n\n

Ta ch\u1ecdn \u0111\u0129a m\u00e0i m\u00e9m cho v\u1eadt li\u1ec7u c\u1ee9ng v\u00e0 \u0111\u0129a m\u00e0i c\u1ee9ng cho v\u1eadt li\u1ec7u m\u1ec1m.<\/p>\n\n\n\n

\u1edf h\u1ea1t m\u1ecbn v\u00e0 phoi m\u1ecfng n\u00ean d\u00f9ng \u0111\u0129a m\u00e0i m\u1ec1m v\u00ec \u0111\u1ed9 c\u1ee9ng t\u00e1c \u0111\u1ed9ng l\u1edbn h\u01a1n b\u1edfi qua \u0111\u00f3 c\u00e1c h\u1ea1t n\u00e0y d\u1ec5 v\u1ee1 h\u01a1n.<\/p>\n\n\n\n

Tinh th\u1ec3 (c\u1ea5u tr\u00fac)<\/strong><\/p>\n\n\n\n

Ta g\u1ecdi tinh th\u1ec3 l\u00e0 quan h\u1ec7 gi\u1eefa h\u1ea1t m\u00e0i, ch\u1ea5t k\u1ebft d\u00ednh v\u00e0 kho\u1ea3ng tr\u1ed1ng trong b\u00e1nh m\u00e0i (H\u00ecnh 2). C\u00e1c l\u1ed7 b\u1ecdng c\u1ea5u th\u00e0nh bu\u1ed5ng ch\u1ee9a phoi v\u00e0 th\u00fac \u0111\u1ea9y s\u1ef1 l\u00e0m m\u00e1t khi m\u00e0i. C\u00e1c kho\u1ea3ng tr\u1ed1ng qu\u00e1 nh\u1ecf s\u1ebd l\u00e0m t\u0103ng \u00e1p l\u1ef1c v\u00e0 nhi\u1ec7t l\u00fac m\u00e0i.<\/p>\n\n\n\n

M\u00e3 s\u1ed1 c\u1ee7a tinh th\u1ec3 c\u00e0ng l\u1edbn th\u00ec \u0111\u0129a m\u00e0i s\u1ebd x\u1ed1p h\u01a1n.<\/p>\n\n\n\n

C\u00e1c tinh th\u1ec3 ph\u1ea3i tho\u00e1ng h\u01a1n khi phoi trong v\u00f9ng ti\u1ebfp x\u00fac ph\u1ea3i \u0111\u01b0\u1ee3c ti\u1ebfp nh\u1eadn v\u00e0o trong c\u00e1c kho\u1ea3ng tr\u1ed1ng nhi\u1ec1u h\u01a1n.<\/p>\n\n\n\n

K\u00fd hi\u1ec7u c\u1ee7a h\u1ea1t m\u00e0i \u0111\u01b0\u1ee3c tr\u00ecnh b\u00e0y theo th\u1ee9 t\u1ef1 c\u1ee7a s\u01a1 \u0111\u1ed5 d\u01b0\u1edbi \u0111\u00e2y. Con s\u1ed1 ch\u1ec9 h\u00ecnh d\u1ea1ng c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c th\u00eam v\u00e0o ch\u1eef hoa ch\u1ec9 d\u1ea1ng (ngo\u00e0i) bi\u00ean (B\u1ea3ng 2).<\/p>\n\n\n\n

C\u00e2n b\u1eb1ng \u0111\u0129a m\u00e0i<\/strong><\/p>\n\n\n\n

Vi\u1ec7c ph\u00e2n b\u1ed5 h\u1ea1t v\u00e0 ch\u1ea5t k\u1ebft d\u00ednh kh\u00f4ng \u0111\u1ec5u \u1edf \u0111\u0129a m\u00e0i kh\u00f4ng c\u00e2n b\u1eb1ng l\u00e0m h\u00ecnh th\u00e0nh c\u00e1c l\u1ef1c ly t\u00e2m. Vi\u1ec7c c\u00e2n b\u1eb1ng \u0111\u0129a m\u00e0i c\u1ef1c k\u1ef3 quan tr\u1ecdng \u1edf \u0111\u0129a m\u00e0i l\u1edbn, b\u1ea3n r\u1ed9ng v\u00e0 \u0111\u1eb7c bi\u1ec7t v\u1edbi t\u1ed1c \u0111\u1ed9 chu vi cao. \u0110\u1ec3 c\u00e2n b\u1eb1ng t\u0129nh \u0111\u0129a m\u00e0i \u0111\u01b0\u1ee3c \u0111\u1ec3 l\u00ean m\u1ed9t c\u00e1i c\u00e2n \u0111\u1ec3 \u0111i\u1ec3u ch\u1ec9nh \u0111\u00fang hay m\u1ed9t b\u1ee3 \u0111\u1ee1 l\u0103n (gi\u00e1 \u0111\u1ee1 l\u0103n) (H\u00ecnh 1).<\/p>\n\n\n\n

\u0110\u1ed1i tr\u1ecdng c\u00e2n b\u1eb1ng \u0111\u01b0\u1ee3c di chuy\u1ec3n trong v\u00f2ng r\u00e3nh, \u0111\u1ebfn khi n\u00e0o \u0111\u0129a m\u00e0i \u0111\u1ee9ng y\u00ean \u1edf m\u1ecdi v\u1ecb tr\u00ed.<\/p>\n\n\n\n

Li\u1ebfc \u0111\u00e1 (H\u00ecnh 2)<\/strong><\/p>\n\n\n\n

Li\u1ebfc b\u00e1nh m\u00e0i c\u00f3 hai m\u1ee5c \u0111\u00edch:<\/p>\n\n\n\n

S\u1eeda ti\u1ebft di\u1ec7n (s\u1eeda pr\u00f4\u00edin) \u0111\u1ec3 ti\u1ebft di\u1ec7n, c\u00e1c b\u00e1n k\u00ednh v\u00e0 k\u00edch th\u01b0\u1edbc \u0111\u1ea1t \u0111\u01b0\u1ee3c trong v\u00f2ng dung sai. C\u00e1c \u0111\u0129a m\u00e0i m\u1edbi k\u1eb9p c\u0169ng ph\u1ea3i \u0111\u01b0\u1ee3c ch\u1ec9nh s\u1eeda \u0111\u1ed9 \u0111\u1ed5ng t\u00e2m v\u00e0 \u0111\u1ed9 \u0111\u1ea3o m\u1eb7t \u0111\u1ea9u.<\/p>\n\n\n\n

M\u00e0i s\u1eafc \u0111\u1ec3 m\u1edf r\u1ed9ng bu\u1ed5ng ch\u1ee9a phoi qua vi\u1ec7c lo\u1ea1i b\u1ecf c\u00e1c k\u1ebft d\u00ednh v\u00e0 \u0111\u1ec5 c\u1ea3i thi\u1ec7n s\u1ef1 ti\u1ebfp x\u00fac c\u1eaft c\u1ee7a h\u1ea1t m\u00e0i.<\/p>\n\n\n\n

Sau khi s\u1eeda ti\u1ebft di\u1ec7n, \u0111\u0129a m\u00e0i b\u1eb1ng coridon v\u00e0 silicium cacb\u00edt \u0111\u01b0\u1ee3c m\u00e0i \u0111\u1ee7 s\u1eafc v\u1edbi d\u1ee5ng c\u1ee5 li\u1ebfc \u0111\u00e1 b\u1eb1ng kim c\u01b0\u01a1ng hay th\u00e9p (H\u00ecnh3)<\/p>\n\n\n

\n
\"\"<\/figure><\/div>\n\n\n

\u0110\u0129a m\u00e0i kim c\u01b0\u01a1ng hay \u0111\u0129a m\u00e0i CBN \u0111\u01b0\u1ee3c s\u1eeda ti\u1ebft di\u1ec7n v\u1edbi \u0111\u0129a s\u1eeda \u0111\u00e1 b\u1eb1ng silicium cacbit hay b\u00e1nh xe li\u1ebfc ti\u1ebft di\u1ec7n b\u1eb1ng kim c\u01b0\u01a1ng. Khi l\u00e0m s\u1eafc v\u1edbi \u0111\u00e1 li\u1ebfc b\u1eb1ng coridon c\u00e1c ch\u1ea5t k\u1ebft d\u00ednh \u0111\u01b0\u1ee3c lo\u1ea1i b\u1ecf cho \u0111\u1ebfn khi \u0111\u1ea1t \u0111\u01b0\u1ee3c ph\u1ea9n h\u1ea1t n\u1ed5i l\u00ean \u0111\u1ea1t m\u1ee9c t\u1ed1i \u01b0u v\u00e0o kho\u1ea3ng m\u1ed9t ph\u1ea9n ba c\u1ee7a h\u1ea1t.\\<\/p>\n\n\n\n

An to\u00e0n khi m\u00e0i<\/strong><\/p>\n\n\n\n

\u0110\u00e1 m\u00e0i k\u1ebft d\u00ednh b\u1eb1ng g\u1ed1m r\u1ea5t d\u1ec5 v\u1ee1. v\u00e9t n\u1ee9t nh\u1ecf hay vi\u1ec7c k\u1eb9p kh\u00f4ng \u0111\u00fang quy c\u00e1ch s\u1ebd d\u1eabn \u0111\u1ebfn \u0111\u00e1 b\u1ecb v\u1ee1 v\u0103ng ra. \u1edf t\u1ed1c \u0111\u1ed9 chu vi c\u1ee7a \u0111\u0129a b\u1eb1ng 80 m\/gi\u00e2y (t\u01b0\u01a1ng \u0111\u01b0\u01a1ng 288 km\/gi\u1edd) c\u00e1c m\u1ea3ng v\u1ee1 v\u0103ng bay ra tr\u1edf th\u00e0nh nguy hi\u1ec3m ch\u1ebft ng\u01b0\u1eddi. Ch\u1ec9 khi n\u00e0o gi\u1eef \u0111\u01b0\u1ee3c quy t\u1eafc an to\u00e0n th\u00ec m\u00e0i m\u1edbi l\u00e0 m\u1ed9t ph\u01b0\u01a1ng ph\u00e1p gia c\u00f4ng \u0111\u00e1ng tin c\u1eady.<\/p>\n\n\n\n

Quy t\u1eafc an to\u00e0n<\/strong><\/p>\n\n\n\n

Tr\u01b0\u1edbc m\u1ed7i l\u1ea7n k\u1eb9p m\u1ed9t \u0111\u0129a m\u00e0i b\u1eb1ng g\u1ed1m ph\u1ea3i th\u1ef1c hi\u1ec7n vi\u1ec7c th\u1eed\u00e2m. D\u00f9ng ng\u00f3n tay hay tr\u1ee5c cho v\u00e0o l\u1ed7 gi\u1eefa \u0111\u0129a m\u00e0i gi\u1eef l\u1ea1i v\u00e0 d\u00f9ng m\u1ed9t thanh kh\u00f4ng ph\u1ea3i kim lo\u1ea1i g\u00f5 v\u00e0o c\u00e1c v\u1ecb tr\u00ed kh\u00e1c nhau. \u0110\u0129a kh\u00f4ng c\u00f3 v\u1ebft n\u1ee9t s\u1ebd cho ti\u1ebfng k\u00eau thanh.<\/p>\n\n\n\n

\u0110\u0129a m\u00e0i ph\u1ea3i \u0111\u01b0\u1ee3c \u0111\u1ea9y v\u00e0o tr\u1ee5c nh\u1eb9 nh\u00e0ng, kh\u00f4ng d\u00f9ng l\u1ef1c m\u1ea1nh \u0111\u1ec3 c\u01b0\u1ee1ng \u00e9p.<\/p>\n\n\n\n

\u0110\u01b0\u1eddng k\u00ednh t\u1ed1i thi\u1ec3u c\u1ee7a m\u1eb7t b\u00edch k\u1eb9p \u1edf \u0111\u0129a m\u00e0i th\u1eb3ng l\u00e0 1\/3. D, \u1edf \u0111\u0129a m\u00e0i c\u00f4n l\u00e0 1\/2 . D (H\u00ecnh 4)<\/p>\n\n\n\n

\u0110\u1ec3 \u0111\u1ea3m b\u1ea3o cho \u0111\u0129a ch\u1ea1y ph\u1eb3ng t\u1ed1t, ch\u1ec9 \u0111\u01b0\u1ee3c ph\u00e9p s\u1eed d\u1ee5ng m\u1eb7t b\u00edch k\u1eb9p c\u00f9ng c\u1ee1, c\u00f9ng h\u00ecnh d\u1ea1ng \u0111\u01b0\u1ee3c ti\u1ec7n m\u1eb7t sau v\u1edbi c\u00e1c \u0111\u1ec7m m\u1ec1m, co gi\u00e3n \u0111\u00fang k\u00edch th\u01b0\u1edbc.<\/p>\n\n\n\n

B\u00e1nh m\u00e0i v\u1edbi D > 80 mm sau khi l\u1eafp v\u00e0o ph\u1ea3i v\u01b0\u1ee3t qua th\u00e0nh c\u00f4ng \u0111\u01b0\u1ee3c vi\u1ec7c ch\u1ea1y th\u1eed kh\u00f4ng t\u1ea3i \u00edt nh\u1ea5t 5 ph\u00fat v\u1edbi s\u1ed1 v\u00f2ng quay cao nh\u1ea5t cho ph\u00e9p trong v\u00f9ng nguy hi\u1ec3m \u0111\u01b0\u1ee3c b\u1ea3o \u0111\u1ea3m an to\u00e0n.<\/p>\n\n\n\n

Ch\u1ec9 \u0111\u01b0\u1ee3c ph\u00e9p \u0111i\u1ec3u ch\u1ec9nh c\u00e1c b\u1ec7 chi ti\u1ebft hay n\u1eafp \u0111\u1eady b\u1ea3o v\u1ec7 khi m\u00e1y ng\u1eebng (H\u00ecnh 5).<\/p>\n\n\n

\n
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L\u00fac m\u00e0i ph\u1ea3i mang k\u00ednh b\u1ea3o h\u1ed9.3\u1ec76.6.3 \u1ea2nh h\u01b0\u1edfng v\u00e0o k\u1ebft qu\u1ea3 m\u00e0i<\/p>\n\n\n\n

C\u00e1c y\u00eau c\u1ea7u v\u1ec1 \u0111\u1eb7c t\u00ednh ch\u1ea5t i\u01b0\u1ee3ng c\u1ee7a chi ti\u1ebft m\u00e0i ch\u1ec9 c\u00f3 th\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c, khi \u0111\u0129a m\u00e0i v\u00e0 \u0111i\u1ec1u ki\u1ec7n c\u1eaft c\u1ee7a m\u00e1y m\u00e0i \u0111\u01b0\u1ee3c \u0111i\u1ec3u ch\u1ec9nh c\u1ea9n th\u1eadn tr\u00ean chi ti\u1ebft m\u00e0i (H\u00ecnh 1).<\/p>\n\n\n\n

Th\u00f4ng s\u1ed1 c\u1eaft g\u1ecdt (Bi\u1ebfn c\u1eaft g\u1ecdt, \u0111\u1ed9 l\u1edbn gia c\u00f4ng)<\/p>\n\n\n\n

M\u1ed7i ph\u01b0\u01a1ng ph\u00e1p m\u00e0i \u0111\u01b0\u1ee3c ph\u00e2n bi\u1ec7t qua chuy\u1ec3n \u0111\u1ed9ng ti\u00eau bi\u1ec3u v\u00e0 th\u00f4ng s\u1ed1 c\u1eaft g\u1ecdt (th\u00f4ng s\u1ed1 \u0111i\u1ec1u ch\u1ec9nh m\u00e1y) (H\u00ecnh 2 v\u00e0 B\u1ea3ng 1).<\/p>\n\n\n

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T\u1ed1c \u0111\u1ed9 l\u00e0m vi\u1ec7c c\u1ee7a \u0111\u0129a m\u00e0i V t\u01b0\u01a1ng \u1ee9ng v\u1edbi t\u1ed1c<\/p>\n\n\n\n

\u0111\u1ed9 chu vi. Ngo\u00e0i t\u1ed1c \u0111\u1ed9 l\u00e0m vi\u1ec7c cao nh\u1ea5t tr\u00ean nh\u00e3n c\u0169ng c\u00f3 ghi s\u1ed1 v\u00f2ng quay cho ph\u00e9p.<\/p>\n\n\n\n

Quy t\u1eafc an to\u00e0n<\/p>\n\n\n\n

Trong m\u1ecdi tr\u01b0\u1eddng h\u1ee3p t\u1ed1c \u0111\u1ed9 l\u00e0m vi\u1ec7c kh\u00f4ng \u0111\u01b0\u1ee3c ph\u00e9p v\u01b0\u1ee3t qu\u00e1 t\u1ed1c \u0111\u1ed9 l\u00e0m vi\u1ec7c cao nh\u1ea5t ghi \u1edf nh\u00e3n \u0111\u0129a m\u00e0i.<\/p>\n\n\n\n

\u0110\u0129a m\u00e0i v\u00e0 m\u00e1y cho t\u1ed1c \u0111\u1ed9 l\u00e0m vi\u1ec7c gia t\u0103ng ph\u1ea3i tu\u00e2n th\u1ee7 c\u00e1c quy \u0111\u1ecbnh qu\u1ed1c gia v\u1ec1 an to\u00e0n.<\/p>\n\n\n\n

Th\u00f4ng th\u01b0\u1eddng t\u1ed1c \u0111\u1ed9 l\u00e0m vi\u1ec7c cao nh\u1ea5t khi m\u00e0i l\u00ean t\u1edbi 35m\/gi\u00e2y tr\u00ean nh\u1eefng m\u00e1y m\u00e0i c\u1ed1 \u0111\u1ecbnh. T\u1ed1c \u0111\u1ed9 l\u00e0m vi\u1ec7c c\u00f3 th\u1ec3 t\u0103ng \u0111\u1ebfn 160m\/ph\u00fat. Nh\u1eefng \u0111\u0129a m\u00e0i n\u00e0y \u0111\u01b0\u1ee3c \u0111\u00e1nh d\u1ea5u b\u1eb1ng m\u00e0u (B\u1ea3ng 2).<\/p>\n\n\n\n

Th\u00ed d\u1ee5: s\u1ed1 v\u00f2ng quay n\u00e0o \u0111\u01b0\u1ee3c \u0111i\u1ec1u ch\u1ec9nh \u0111\u1ec3 m\u1ed9t \u0111\u0129a m\u00e0i v\u1ed1i \u0111\u01b0\u1eddng k\u00ednh D =450mm c\u0169ng c\u00f2n ch\u1ea1y v\u1edbi D= 250 m\/ph\u00fat \u1edf t\u1ed1c \u0111\u1ed9 V, = 35m\/gi\u00e2y.<\/p>\n\n\n

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T\u1ed0C \u0111\u1ed9 b\u01b0\u1edbc d\u1eabn ti\u1ebfn vf (t\u1ed1c \u0111\u1ed9 phoi) t\u01b0\u01a1ng \u1ee9ng v\u1edbi t\u1ed1c \u0111\u1ed9 b\u01b0\u1edbc d\u1eabn ti\u1ebfn b\u00e0n m\u00e0i \u1edf m\u00e0i ph\u1eb3ng, \u1edf m\u00e0i tr\u00f2n l\u00e0 t\u1ed1c \u0111\u1ed9 chu vi c\u1ee7a chi ti\u1ebft.<\/p>\n\n\n\n

B\u01b0\u1edbc d\u1eabn ti\u1ebfn ngang f b\u1eb1ng mm cho m\u1ed7i h\u00e0nh tr\u00ecnh c\u0169ng nh\u01b0 b\u01b0\u1edbc d\u1eabn ti\u1ebfn d\u00e0i f b\u1eb1ng mm cho m\u1ed7i v\u00f2ng quay \u1edf m\u00e0i tr\u00f2n c\u1ee7a chi ti\u1ebft t\u00f9y thu\u1ed9c theo b\u1ec1 ngang bs c\u1ee7a \u0111\u0129a m\u00e0i.<\/p>\n\n\n\n

L\u01b0\u1ee3ng \u0103n dao a (a ) l\u00e0 chi\u1ec3u s\u00e2u c\u1eaft th\u1eb3ng g\u00f3c v\u1edbi chi\u1ec3u d\u1eabn ti\u1ebfn ch\u00ednh. M\u00e0i ho\u00e0n ch\u1ec9nh kh\u00f4ng c\u00f3 l\u01b0\u1ee3ng \u0103n dao g\u1ecdi l\u00e0 \u201cn\u1eb9t l\u1eeda\u201d hay \u201cc\u00f3 l\u1eeda<\/p>\n\n\n\n

Ng\u01b0\u1eddi ta ch\u1ecdn l\u01b0\u1ee3ng \u0103n dao l\u1edbn khi m\u00e0i ph\u00e1 (m\u00e0i th\u00f4), ch\u1ecdn l\u01b0\u1ee3ng \u0103n dao nh\u1ecf \u0111\u1ec3 m\u00e0i tinh.<\/p>\n\n\n\n

Th\u00ed d\u1ee5: M\u1ed9t tr\u1ee5c th\u00e9p \u0111\u01b0\u1ee3c m\u00e0i v\u1edbi m\u1ed9t t\u1ed1c \u0111\u1ed9 l\u00e0m vi\u1ec7c l\u00e0 35m\/ph\u00fat (q = 125). V\u1eadn t\u1ed1c chu vi vf c\u1ee7a tr\u1ee5c l\u00e0 bao nhi\u00eau?<\/p>\n\n\n

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S\u1ef1 t\u0103ng t\u1ed1c \u0111\u1ed9 d\u1eabn ti\u1ebfn \u1edf v\u1eadn t\u1ed1c l\u00e0m vi\u1ec7c kh\u00f4ng thay \u0111\u1ed5i l\u00e0m t\u0103ng th\u00eam s\u1ef1 m\u00e0i m\u00f2n \u0111\u0129a m\u00e0i v\u00e0 \u0111\u1ed9 nh\u1ea5p nh\u00f4 c\u0169ng nh\u01b0 gi\u1ea3m nhi\u1ec7t \u0111\u1ed9 \u1edf v\u00f9ng bi\u00ean.<\/p>\n\n\n

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Nhi\u1ec7t \u0111\u1ed9 m\u00e0i v\u00e0 l\u00e0m ngu\u1ed9i b\u00f4i tr\u01a1n<\/strong><\/p>\n\n\n\n

L\u00fac m\u00e0i ph\u00e1t sinh nhi\u1ec3u nhi\u1ec7t qua s\u1ef1 c\u1ecd s\u00e1t c\u1ee7a h\u1ea1t m\u00e0i l\u00fac c\u1ea5u th\u00e0nh phoi, \u1edf v\u00f9ng bi\u00ean c\u1ee7a phoi nhi\u1ec7t c\u00f3 th\u1ec3 l\u00ean \u0111\u1ebfn tr\u00ean 1000\u00b0c. Nhi\u1ec7t l\u00fac m\u00e0i l\u00e0 nguy\u00ean nh\u00e2n l\u00e0m t\u1ed5n h\u1ea1i nh\u01b0 k\u00edch th\u01b0\u1edbc sai l\u1ec7ch, \u1ee9ng su\u1ea5t v\u00e0 h\u00ecnh th\u00e0nh v\u1ebft n\u1ee9t b\u1edfi nhi\u1ec7t \u0111\u1ed9 thay \u0111\u1ed5i \u1edf v\u00f9ng m\u00e0i (H\u00ecnh 2).<\/p>\n\n\n

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\u0110\u1ed1m ch\u00e1y l\u00e0 m\u1ed9t d\u1ea5u hi\u1ec7u, tinh th\u1ec3 v\u1eadt li\u1ec7u \u1edf v\u00f9ng bi\u00ean chi ti\u1ebft b\u1ecb t\u1ed5n h\u1ea1i b\u1edfi s\u1ef1 qu\u00e1 nhi\u1ec7t. H\u1eadu qu\u1ea3 c\u1ee7a nhi\u1ec7t \u0111\u1ed9 m\u00e0i cao c\u0169ng c\u00f3 th\u1ec3 l\u00e0 m\u1ed9t l\u1edbp da m\u1ec1m v\u00e0 sau \u0111\u00f3 h\u00ecnh th\u00e0nh m\u1ed9t l\u1edbp c\u1ee9ng m\u1edbi \u1edf b\u1ec3 m\u1eb7t nh\u1edd t\u00e1c d\u1ee5ng c\u1ee7a dung d\u1ecbch l\u00e0m ngu\u1ed9i (H\u00ecnh 3 trang 183).<\/p>\n\n\n\n

Nhi\u1ec7t \u0111\u1ed9 th\u1ea5p \u1edf v\u00f9ng bi\u00ean \u0111\u1ea1t \u0111\u01b0\u1ee3c qua:<\/p>\n\n\n\n

B\u01b0\u1edbc ti\u1ebfn ngang nh\u1ecf v\u00e0 b\u1ec1 d\u00e0i ti\u1ebfp x\u00fac nh\u1ecf.<\/p>\n\n\n\n

T\u1ef7 s\u1ed1 t\u1ed1c \u0111\u1ed9 q nh\u1ecf.<\/p>\n\n\n\n

B\u00e1nh m\u00e0i v\u1edbi \u0111\u1ed9 b\u00e1m cao, l\u1ef1cgi\u1eefh\u1ea1tth\u1ea5p v\u00e0 h\u1ea1t gi\u00f2n.<\/p>\n\n\n\n

B\u00f4i tr\u01a1n l\u00e0m ngu\u1ed9i m\u00e3nh li\u1ec7t. Qua b\u00f4i tr\u01a1n l\u00e0m ngu\u1ed9i ta gi\u1ea3m thi\u1ec3u nhi\u1ec7t ma s\u00e1t, l\u00e0m s\u1ea1ch bu\u1ed5ng ch\u1ee9a phoi v\u00e0 l\u00e0m ngu\u1ed9i chi ti\u1ebft. Dung d\u1ecbch m\u00e0i (ch\u1ea5t b\u00f4i tr\u01a1n l\u00e0m ngu\u1ed9i) hi\u1ec7u qu\u1ea3 nh\u1ea5t l\u00e0 d\u1ea7u m\u00e0i, n\u00f3 l\u00e0m gi\u1ea3m m\u1ea1nh nhi\u1ec7t ma s\u00e1t h\u01a1n d\u1ea7u m\u00e0i h\u00f2a tan emulsi. D\u00f9ng d\u1ea9u m\u00e0i emulsi khi\u1ebfn cho v\u00f9ng bi\u00ean n\u00f3ng h\u01a1n v\u00e0 sau \u0111\u00f3 l\u00e0m ngu\u1ed9i \u0111\u1ed9t ng\u1ed9t, do \u0111\u00f3 th\u01b0\u1eddng xuy\u00ean x\u1ea3y ra v\u1ebft n\u1ee9t m\u00e0i.<\/p>\n\n\n\n

\u1edf v\u1eadn t\u1ed1c \u0111\u0129a m\u00e0i cao ph\u1ea3i d\u00f9ng dung d\u1ecbch c\u1eaft (dung d\u1ecbch b\u00f4i tr\u01a1n l\u00e0m ngu\u1ed9i) d\u01b0\u1edbi \u00e1p su\u1ea5t cao. T\u1ed1c \u0111\u1ed9 b\u01b0\u1edbc d\u1eabn ti\u1ebfn c\u00e0ng th\u1ea5p v\u00e0 c\u00e0ng ph\u00e1t sinh nhi\u1ec1u nhi\u1ec7t h\u00ecnh th\u00e0nh th\u00ec l\u01b0u l\u01b0\u1ee3ng d\u00f2ng ch\u1ea3y (t\u1ed1c \u0111\u1ed9 d\u00f2ng ch\u1ea3y) c\u1ee7a dung d\u1ecbch c\u1eaft c\u00e0ng l\u1edbn h\u01a1n.<\/p>\n\n\n

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<\/figcaption><\/figure><\/div>\n\n
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\"\"<\/figure><\/div>\n\n\n

<\/p>","protected":false},"excerpt":{"rendered":"

C\u00e1ch \u0111\u1ecdc k\u00fd hi\u1ec7u tr\u00ean \u0111\u00e1 m\u00e0i Ph\u1ea9n l\u1edbn c\u00e1c \u0111\u0129a m\u00e0i ch\u1ee9a h\u1ea1t m\u00e0i b\u1eb1ng b\u1ed9t m\u00e0i (coridon) (tr\u1eafng, h\u1ed5ng) hay silicium cacbit (xanh,\u0111en). \u0110\u1ed9 d\u1ebbo dai c\u1ee7a h\u1ea1t gi\u1ea3m v\u1edbi \u0111\u1ed9 c\u1ee9ng t\u0103ng c\u1ee7a h\u1ea1t m\u00e0i. H\u1ea1t m\u00e0i c\u1ee9ng gi\u00f2n l\u00fac ch\u1ecbu t\u1ea3i nh\u1ecf (m\u00e0i tinh) c\u00f3 kh\u1ea3 n\u0103ng t\u1ef1 l\u00e0m s\u1eafc qua […]<\/p>","protected":false},"author":1,"featured_media":2437,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[42],"tags":[],"yst_prominent_words":[],"_links":{"self":[{"href":"https:\/\/kiennguyen900.com\/en\/wp-json\/wp\/v2\/posts\/1557"}],"collection":[{"href":"https:\/\/kiennguyen900.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/kiennguyen900.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/kiennguyen900.com\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/kiennguyen900.com\/en\/wp-json\/wp\/v2\/comments?post=1557"}],"version-history":[{"count":14,"href":"https:\/\/kiennguyen900.com\/en\/wp-json\/wp\/v2\/posts\/1557\/revisions"}],"predecessor-version":[{"id":2467,"href":"https:\/\/kiennguyen900.com\/en\/wp-json\/wp\/v2\/posts\/1557\/revisions\/2467"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/kiennguyen900.com\/en\/wp-json\/wp\/v2\/media\/2437"}],"wp:attachment":[{"href":"https:\/\/kiennguyen900.com\/en\/wp-json\/wp\/v2\/media?parent=1557"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kiennguyen900.com\/en\/wp-json\/wp\/v2\/categories?post=1557"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kiennguyen900.com\/en\/wp-json\/wp\/v2\/tags?post=1557"},{"taxonomy":"yst_prominent_words","embeddable":true,"href":"https:\/\/kiennguyen900.com\/en\/wp-json\/wp\/v2\/yst_prominent_words?post=1557"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}