{"id":8973,"date":"2020-01-07T10:40:04","date_gmt":"2020-01-07T03:40:04","guid":{"rendered":"https:\/\/phelieu247.com\/?p=8973"},"modified":"2020-02-13T14:35:43","modified_gmt":"2020-02-13T07:35:43","slug":"cach-nhan-biet-va-thu-kim-loai-dong","status":"publish","type":"post","link":"https:\/\/phelieu247.com\/en\/cach-nhan-biet-va-thu-kim-loai-dong\/","title":{"rendered":"C\u00e1ch Nh\u1eadn Bi\u1ebft Va\u0300 Th\u1eed Kim Lo\u1ea1i \u0110\u1ed3ng. C\u00e1ch ph\u00e2n Bi\u1ec7t \u0110\u1ed3ng \u2013 \u0110\u1ed3ng Thau"},"content":{"rendered":"

Sorry, this entry is only available in Ti\u1ebfng Vi\u1ec7t<\/a>. For the sake of viewer convenience, the content is shown below in the alternative language. You may click the link to switch the active language.<\/p>

<\/p>\n

C\u00c1CH NH\u1eacN BI\u1ebeT VA\u0300 TH\u1eec KIM LO\u1ea0I \u0110\u1ed2NG<\/strong><\/span><\/h2>\n

Do t\u00ednh d\u1eabn \u0111i\u1ec7n c\u1ee7a \u0111\u1ed3ng, kim lo\u1ea1i \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng th\u01b0\u1eddng xuy\u00ean nh\u01b0 d\u00e2y \u0111i\u1ec7n.\u00a0N\u00f3 c\u0169ng l\u00e0 m\u1ed9t th\u00e0nh ph\u1ea7n trong nhi\u1ec1u \u0111\u1ed3 v\u1eadt b\u1eb1ng kim lo\u1ea1i, bao g\u1ed3m m\u1ed9t s\u1ed1 \u0111\u1ed3ng ti\u1ec1n.\u00a0N\u1ebfu b\u1ea1n quen thu\u1ed9c v\u1edbi m\u1ed9t s\u1ed1 t\u00ednh ch\u1ea5t h\u00f3a h\u1ecdc v\u00e0 v\u1eadt l\u00fd c\u1ee7a \u0111\u1ed3ng, b\u1ea1n c\u00f3 th\u1ec3 th\u1ef1c hi\u1ec7n m\u1ed9t s\u1ed1 c\u00e1ch nh\u1eadn bi\u1ebft va\u0300 th\u1eed kim lo\u1ea1i \u0111\u1ed3ng<\/strong><\/a> v\u1edbi nhi\u1ec1u th\u1eed nghi\u1ec7m kh\u00e1c nhau \u0111\u1ec3 \u0111\u00e1nh gi\u00e1 \u0111\u1ed9 tinh khi\u1ebft c\u1ee7a \u0111\u1ed3ng c\u1ee7a v\u1eadt th\u1ec3.<\/p>\n

\"C\u00e1ch<\/p>\n

C\u00e1ch nh\u1eadn bi\u1ebft va\u0300 th\u1eed kim lo\u1ea1i \u0111\u1ed3ng qua t\u1eeb t\u00ednh<\/strong><\/span><\/h3>\n

\u0110\u1ed3ng ch\u1ec9 c\u00f3 t\u1eeb t\u00ednh nh\u1eb9. Do \u0111\u00f3, n\u1ebfu b\u1ea1n c\u00f3 nam ch\u00e2m, b\u1ea1n \u0111\u1ec3 g\u1ea7n v\u1edbi \u0111\u1ed3ng, b\u1ea1n s\u1ebd kh\u00f4ng th\u1ea5y b\u1ea5t k\u1ef3 hi\u1ec7u \u1ee9ng n\u00e0o. Tuy nhi\u00ean, nam ch\u00e2m m\u1ea1nh c\u00f3 th\u1ec3 c\u00f3 \u1ea3nh h\u01b0\u1edfng nh\u1eb9 \u0111\u1ebfn v\u1eadt th\u1ec3 b\u1eb1ng \u0111\u1ed3ng. Khi b\u1ea1n th\u1ea3 m\u1ed9t nam ch\u00e2m m\u1ea1nh qua \u1ed1ng \u0111\u1ed3ng, n\u00f3 s\u1ebd r\u01a1i ch\u1eadm h\u01a1n b\u00ecnh th\u01b0\u1eddng. \u0110i\u1ec1u n\u00e0y l\u00e0 do d\u00f2ng \u0111i\u1ec7n xo\u00e1y \u0111\u01b0\u1ee3c t\u1ea1o ra trong \u0111\u1ed3ng b\u1edfi t\u1eeb tr\u01b0\u1eddng chuy\u1ec3n \u0111\u1ed9ng. N\u1ebfu v\u1eadt th\u1ec3 c\u1ee7a b\u1ea1n th\u1ec3 hi\u1ec7n c\u00e1c t\u00ednh ch\u1ea5t t\u1eeb \u200b\u200bt\u00ednh n\u00e0y, n\u00f3 c\u00f3 th\u1ec3 l\u00e0 \u0111\u1ed3ng.<\/p>\n

C\u00e1ch nh\u1eadn bi\u1ebft va\u0300 th\u1eed kim lo\u1ea1i \u0111\u1ed3ng qua \u0111i\u1ec7n tr\u1edf su\u1ea5t v\u00e0 \u0111\u1ed9 d\u1eabn \u0111i\u1ec7n<\/strong><\/span><\/h3>\n

\u0110\u1ed3ng c\u00f3 \u0111i\u1ec7n tr\u1edf su\u1ea5t kho\u1ea3ng 1,7 x 10-8<\/sup> \u03a9m \u1edf nhi\u1ec7t \u0111\u1ed9 ph\u00f2ng. \u0110i\u1ec1u n\u00e0y c\u00f3 ngh\u0129a l\u00e0 n\u00f3 d\u1eabn d\u00f2ng \u0111i\u1ec7n r\u1ea5t t\u1ed1t. N\u1ebfu v\u1eadt th\u1ec3 c\u1ee7a b\u1ea1n kh\u00f4ng d\u1eabn \u0111i\u1ec7n t\u1ed1t, n\u00f3 kh\u00f4ng \u0111\u01b0\u1ee3c l\u00e0m b\u1eb1ng \u0111\u1ed3ng nguy\u00ean ch\u1ea5t. N\u1ebfu b\u1ea1n c\u00f3 th\u1ec3 x\u00e1c \u0111\u1ecbnh \u0111i\u1ec7n tr\u1edf c\u1ee7a v\u1eadt th\u1ec3 c\u1ee7a b\u1ea1n b\u1eb1ng \u03a9m, b\u1ea1n c\u00f3 th\u1ec3 t\u00ednh \u0111i\u1ec7n tr\u1edf su\u1ea5t c\u1ee7a v\u1eadt li\u1ec7u.<\/p>\n

\n\n\n\n
\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
V\u1eadt li\u1ec7u<\/th>\n\u0110i\u1ec7n tr\u1edf su\u1ea5t
\n\u03a9m, \u1edf 200<\/sup>C<\/th>\n		H\u1ec7 s\u1ed1 nhi\u1ec7t
\n\u0111i\u1ec7n tr\u1edf (K\u22121<\/sup>)<\/th>\n<\/tr>\n
B\u1ea1c<\/td>\n1,59\u00d710\u22128<\/sup><\/td>\n0,0041<\/td>\n<\/tr>\n
\u0110\u1ed3ng<\/td>\n1,72\u00d710\u22128<\/sup><\/td>\n0,0043<\/td>\n<\/tr>\n
V\u00e0ng<\/td>\n2,44\u00d710\u22128<\/sup><\/td>\n0,0034<\/td>\n<\/tr>\n
Nh\u00f4m<\/td>\n2,82\u00d710\u22128<\/sup><\/td>\n0,0044<\/td>\n<\/tr>\n
Tungsten<\/td>\n5,6\u00d710\u22128<\/sup><\/td>\n0,0045<\/td>\n<\/tr>\n
H\u1ee3p kim\u00a0Cu-Zn<\/td>\n0,8\u00d710\u22127<\/sup><\/td>\n0,0015<\/td>\n<\/tr>\n
S\u1eaft<\/td>\n1,0\u00d710\u22127<\/sup><\/td>\n0,005<\/td>\n<\/tr>\n
B\u1ea1ch kim<\/td>\n1,1\u00d710\u22127<\/sup><\/td>\n0,00392<\/td>\n<\/tr>\n
Ch\u00ec<\/td>\n2,2\u00d710\u22127<\/sup><\/td>\n0,0039<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/td>\n\n

\u0110i\u1ec7n tr\u1edf su\u1ea5t (th\u01b0\u1eddng \u0111\u01b0\u1ee3c k\u00fd hi\u1ec7u l\u00e0 \u03c1) c\u1ee7a m\u1ed9t d\u00e2y d\u1eabn l\u00e0 \u0111i\u1ec7n tr\u1edf c\u1ee7a m\u1ed9t d\u00e2y d\u1eabn d\u00e0i 1m c\u00f3 ti\u1ebft di\u1ec7n 1m2<\/sup>, n\u00f3 \u0111\u1eb7c tr\u01b0ng cho v\u1eadt li\u1ec7u d\u00e2y d\u1eabn \u0111\u00f3, hay m\u1ed9t c\u00e1ch t\u1ed5ng qu\u00e1t, n\u00f3 \u0111\u01b0\u1ee3c cho b\u1edfi c\u00f4ng th\u1ee9c:<\/p>\n<\/td>\n<\/tr>\n

\n

\"{\\displaystyle<\/span><\/p>\n<\/td>\n

v\u1edbi R l\u00e0 \u0111i\u1ec7n tr\u1edf, S l\u00e0 ti\u1ebft di\u1ec7n ngang (m, l l\u00e0 chi\u1ec1u d\u00e0i c\u1ee7a kh\u1ed1i v\u1eadt d\u1eabn).<\/td>\n<\/tr>\n
\n

\u0110\u1ecbnh lu\u1eadt Ohm vi ph\u00e2n c\u00f2n cho \u0111\u1ecbnh ngh\u0129a \"{\\displaystyle <\/span>\u0111i\u1ec7n tr\u1edf su\u1ea5t theo c\u00f4ng th\u1ee9c:<\/p>\n<\/td>\n<\/tr>\n

\n

\"{\\displaystyle<\/span><\/p>\n<\/td>\n

v\u1edbi E l\u00e0 c\u01b0\u1eddng \u0111\u1ed9 \u0111i\u1ec7n tr\u01b0\u1eddng, J l\u00e0 m\u1eadt \u0111\u1ed9 d\u00f2ng \u0111i\u1ec7n.<\/td>\n<\/tr>\n
\n

\"{\\displaystyle<\/span><\/p>\n<\/td>\n

\n

Ng\u01b0\u1eddi ta c\u00f2n \u0111\u1ecbnh ngh\u0129a \u0111i\u1ec7n tr\u1edf su\u1ea5t l\u00e0 ngh\u1ecbch \u0111\u1ea3o c\u1ee7a\u00a0\u0111\u1ed9 d\u1eabn \u0111i\u1ec7n:<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\n

\u0110\u1ec3 chuy\u1ec3n \u0111\u1ed5i t\u1eeb \u0111i\u1ec7n tr\u1edf th\u00e0nh \u0111i\u1ec7n tr\u1edf su\u1ea5t, nh\u00e2n \u0111i\u1ec7n tr\u1edf v\u1edbi di\u1ec7n t\u00edch m\u1eb7t c\u1eaft ngang c\u1ee7a v\u1eadt th\u1ec3 v\u00e0 chia cho chi\u1ec1u d\u00e0i c\u1ee7a n\u00f3. N\u1ebfu \u0111i\u1ec7n tr\u1edf su\u1ea5t c\u1ee7a v\u1eadt th\u1ec3 c\u1ee7a b\u1ea1n l\u1edbn h\u01a1n \u0111\u00e1ng k\u1ec3 so v\u1edbi \u0111i\u1ec7n tr\u1edf su\u1ea5t c\u1ee7a \u0111\u1ed3ng, th\u00ec c\u00f3 kh\u1ea3 n\u0103ng n\u00f3 kh\u00f4ng \u0111\u01b0\u1ee3c l\u00e0m b\u1eb1ng \u0111\u1ed3ng nguy\u00ean ch\u1ea5t.<\/p>\n

C\u00e1ch nh\u1eadn bi\u1ebft va\u0300 th\u1eed kim lo\u1ea1i \u0111\u1ed3ng qua \u0111o m\u1eadt \u0111\u1ed9<\/strong><\/span><\/h3>\n

B\u1ea1n c\u00f3 th\u1ec3 ki\u1ec3m tra ph\u1ebf li\u1ec7u \u0111\u1ed3ng<\/strong><\/a> c\u1ee7a m\u00ecnh b\u1eb1ng c\u00e1ch \u0111o m\u1eadt \u0111\u1ed9 c\u1ee7a n\u00f3. M\u1eadt \u0111\u1ed9 c\u1ee7a \u0111\u1ed3ng l\u00e0 8,92 gram m\u1ed7i ml. \u0110\u1ec3 x\u00e1c \u0111\u1ecbnh m\u1eadt \u0111\u1ed9 c\u1ee7a v\u1eadt th\u1ec3 c\u1ee7a b\u1ea1n, c\u00e2n n\u00f3 v\u00e0 sau \u0111\u00f3 chia tr\u1ecdng l\u01b0\u1ee3ng \u0111\u00f3 cho kh\u1ed1i l\u01b0\u1ee3ng c\u1ee7a n\u00f3. N\u1ebfu m\u1eadt \u0111\u1ed9 c\u1ee7a v\u1eadt th\u1ec3 c\u1ee7a b\u1ea1n kh\u00e1c bi\u1ec7t \u0111\u00e1ng k\u1ec3 so v\u1edbi m\u1eadt \u0111\u1ed9 c\u1ee7a \u0111\u1ed3ng, th\u00ec v\u1eadt th\u1ec3 c\u1ee7a b\u1ea1n kh\u00f4ng ph\u1ea3i l\u00e0 \u0111\u1ed3ng nguy\u00ean ch\u1ea5t.<\/p>\n

C\u00e1ch nh\u1eadn bi\u1ebft va\u0300 th\u1eed kim lo\u1ea1i \u0111\u1ed3ng qua m\u00e0u c\u1ee7a \u0111\u1ed3ng<\/strong><\/span><\/h3>\n

C\u00e1ch nh\u1eadn bi\u1ebft va\u0300 th\u1eed kim lo\u1ea1i \u0111\u1ed3ng kh\u00e1c l\u00e0 b\u1ea1n c\u00f3 th\u1ec3 l\u00e0m s\u1ea1ch n\u00f3 b\u1eb1ng h\u1ed7n h\u1ee3p mu\u1ed1i \u0103n v\u00e0 gi\u1ea5m v\u00e0 sau \u0111\u00f3 quan s\u00e1t s\u1ef1 thay \u0111\u1ed5i m\u00e0u s\u1eafc c\u1ee7a n\u00f3. M\u1ed9t trong nh\u1eefng h\u00f3a ch\u1ea5t \u0111\u01b0\u1ee3c t\u1ea1o ra trong s\u1ef1 k\u1ebft h\u1ee3p c\u1ee7a mu\u1ed1i \u0103n v\u00e0 gi\u1ea5m l\u00e0 axit hydrochloric. Khi b\u1ea1n lau v\u1eadt th\u1ec3 c\u1ee7a b\u1ea1n sau khi \u0111\u1eb7t mu\u1ed1i v\u00e0 gi\u1ea5m l\u00ean n\u00f3, axit hydrochloric s\u1ebd gi\u00fap l\u00e0m s\u1ea1ch b\u1ec1 m\u1eb7t c\u1ee7a v\u1eadt li\u1ec7u. N\u1ebfu v\u1eadt li\u1ec7u l\u00e0 \u0111\u1ed3ng, cu\u1ed1i c\u00f9ng n\u00f3 s\u1ebd b\u1ecb oxy h\u00f3a do ti\u1ebfp x\u00fac v\u1edbi oxy, n\u01b0\u1edbc v\u00e0 carbon dioxide. \u0110i\u1ec1u n\u00e0y s\u1ebd t\u1ea1o ra m\u1ed9t m\u00e0u xanh l\u1ee5c tr\u00ean b\u1ec1 m\u1eb7t c\u1ee7a v\u1eadt th\u1ec3.<\/p>\n

C\u00c1CH PH\u00c2N BI\u1ec6T \u0110\u1ed2NG V\u00c0 \u0110\u1ed2NG THAU NH\u01af TH\u1ebe N\u00c0O?<\/strong><\/span><\/h2>\n

\u0110\u1ed3ng l\u00e0 m\u1ed9t kim lo\u1ea1i duy nh\u1ea5t, v\u00ec v\u1eady m\u1ecdi v\u1eadt th\u1ec3 b\u1eb1ng \u0111\u1ed3ng \u0111\u1ec1u c\u00f3 c\u00e1c t\u00ednh ch\u1ea5t g\u1ea7n gi\u1ed1ng nhau. \u0110\u1ed3ng thau, m\u1eb7t kh\u00e1c, l\u00e0 m\u1ed9t h\u1ee3p kim c\u1ee7a \u0111\u1ed3ng, k\u1ebdm v\u00e0 th\u01b0\u1eddng l\u00e0 c\u00e1c kim lo\u1ea1i kh\u00e1c. H\u00e0ng tr\u0103m k\u1ebft h\u1ee3p kh\u00e1c nhau c\u00f3 ngh\u0129a l\u00e0 kh\u00f4ng c\u00f3 c\u00e1ch nh\u1eadn bi\u1ebft va\u0300 th\u1eed kim lo\u1ea1i \u0111\u1ed3ng n\u00e0o l\u00e0 duy nh\u1ea5t, ho\u00e0n h\u1ea3o \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh t\u1ea5t c\u1ea3 \u0111\u1ed3ng thau. \u0110i\u1ec1u \u0111\u00f3 n\u00f3i r\u1eb1ng, m\u00e0u s\u1eafc c\u1ee7a \u0111\u1ed3ng thau th\u01b0\u1eddng \u0111\u1ee7 kh\u00e1c bi\u1ec7t \u0111\u1ec3 t\u00e1ch n\u00f3 kh\u1ecfi \u0111\u1ed3ng.<\/p>\n

Ph\u01b0\u01a1ng ph\u00e1p 1: <\/strong>X\u00e1c \u0111\u1ecbnh b\u1eb1ng m\u00e0u s\u1eafc<\/strong><\/span><\/h3>\n

L\u00e0m s\u1ea1ch kim lo\u1ea1i n\u1ebfu c\u1ea7n thi\u1ebft<\/strong><\/span><\/h4>\n

\"L\u00e0m<\/p>\n

C\u1ea3 \u0111\u1ed3ng thau v\u00e0 \u0111\u1ed3ng \u0111\u1ec1u ph\u00e1t tri\u1ec3n m\u1ed9t l\u1edbp patin theo tu\u1ed5i, th\u01b0\u1eddng l\u00e0 m\u00e0u xanh l\u00e1 c\u00e2y nh\u01b0ng \u0111\u00f4i khi l\u00e0 c\u00e1c m\u00e0u kh\u00e1c. N\u1ebfu kh\u00f4ng th\u1ea5y kim lo\u1ea1i g\u1ed1c n\u00e0o, h\u00e3y th\u1eed c\u00e1c k\u1ef9 thu\u1eadt l\u00e0m s\u1ea1ch \u0111\u1ed3ng thau. Ch\u00fang th\u01b0\u1eddng ho\u1ea1t \u0111\u1ed9ng cho c\u1ea3 hai kim lo\u1ea1i; nh\u01b0ng \u0111\u1ec3 an to\u00e0n, b\u1ea1n c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng s\u1ea3n ph\u1ea9m l\u00e0m s\u1ea1ch b\u1eb1ng \u0111\u1ed3ng v\u00e0 \u0111\u1ed3ng th\u01b0\u01a1ng m\u1ea1i.<\/p>\n

Gi\u1eef kim lo\u1ea1i d\u01b0\u1edbi \u00e1nh s\u00e1ng tr\u1eafng<\/strong><\/span><\/h4>\n

\"Gi\u1eef<\/p>\n

N\u1ebfu kim lo\u1ea1i \u0111\u01b0\u1ee3c \u0111\u00e1nh b\u00f3ng cao, b\u1ea1n c\u00f3 th\u1ec3 th\u1ea5y m\u00e0u sai do \u00e1nh s\u00e1ng ph\u1ea3n x\u1ea1. Nh\u00ecn v\u00e0o n\u00f3 d\u01b0\u1edbi \u00e1nh s\u00e1ng m\u1eb7t tr\u1eddi ho\u1eb7c d\u01b0\u1edbi b\u00f3ng \u0111\u00e8n hu\u1ef3nh quang tr\u1eafng, kh\u00f4ng ph\u1ea3i d\u01b0\u1edbi b\u00f3ng \u0111\u00e8n s\u1ee3i \u0111\u1ed1t m\u00e0u v\u00e0ng.<\/p>\n

X\u00e1c \u0111\u1ecbnh m\u00e0u \u0111\u1ecf c\u1ee7a \u0111\u1ed3ng<\/strong><\/span><\/h4>\n

\"C\u00e1ch<\/p>\n

\u0110\u1ed3ng l\u00e0 m\u1ed9t kim lo\u1ea1i nguy\u00ean ch\u1ea5t, v\u00e0 lu\u00f4n c\u00f3 m\u00e0u n\u00e2u \u0111\u1ecf. M\u1ed9t \u0111\u1ed3ng xu hi\u1ec7n \u0111\u1ea1i c\u1ee7a M\u1ef9 \u0111\u01b0\u1ee3c m\u1ea1 b\u1eb1ng \u0111\u1ed3ng. V\u00e0 g\u1ea7n nh\u01b0 ho\u00e0n to\u00e0n b\u1eb1ng \u0111\u1ed3ng t\u1eeb n\u0103m 1962 \u0111\u1ebfn 1981. V\u00ec v\u1eady \u0111\u00e2y l\u00e0 m\u1ed9t \u0111i\u1ec3m t\u1ed1t \u0111\u1ec3 so s\u00e1nh.<\/p>\n

Ki\u1ec3m tra \u0111\u1ed3ng thau m\u00e0u v\u00e0ng<\/strong><\/span><\/h4>\n

T\u1eeb \u0111\u1ed3ng thau d\u00f9ng \u0111\u1ec3 ch\u1ec9 b\u1ea5t k\u1ef3 h\u1ee3p kim n\u00e0o c\u00f3 ch\u1ee9a \u0111\u1ed3ng v\u00e0 k\u1ebdm.\u00a0C\u00e1c t\u1ef7 l\u1ec7 kh\u00e1c nhau c\u1ee7a c\u00e1c kim lo\u1ea1i n\u00e0y t\u1ea1o ra c\u00e1c m\u00e0u kh\u00e1c nhau, nh\u01b0ng c\u00e1c lo\u1ea1i \u0111\u1ed3ng thau ph\u1ed5 bi\u1ebfn nh\u1ea5t c\u00f3 m\u00e0u v\u00e0ng nh\u1ea1t ho\u1eb7c m\u00e0u v\u00e0ng n\u00e2u t\u01b0\u01a1ng t\u1ef1 nh\u01b0 m\u00e0u \u0111\u1ed3ng.\u00a0Nh\u1eefng h\u1ee3p kim \u0111\u1ed3ng n\u00e0y \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i trong c\u00e1c b\u1ed9 ph\u1eadn gia c\u00f4ng v\u00e0 \u1ed1c v\u00edt.<\/p>\n

\"Ki\u1ec3m<\/p>\n

M\u1ed9t s\u1ed1 \u0111\u1ed3ng thau c\u00f3 b\u1ec1 ngo\u00e0i m\u00e0u v\u00e0ng l\u1ee5c. H\u1ee3p kim n\u00e0y, \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 “kim lo\u1ea1i m\u1ea1 v\u00e0ng”; ch\u1ec9 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng cho m\u1ed9t s\u1ed1 m\u1ee5c \u0111\u00edch chuy\u00ean d\u1ee5ng trong trang tr\u00ed v\u00e0 \u0111\u1ea1n d\u01b0\u1ee3c.<\/p>\n

T\u00ecm hi\u1ec3u v\u1ec1 \u0111\u1ed3ng \u0111\u1ecf ho\u1eb7c cam<\/strong><\/span><\/h4>\n

Nhi\u1ec1u h\u1ee3p kim \u0111\u1ed3ng thau ph\u1ed5 bi\u1ebfn kh\u00e1c c\u00f3 th\u1ec3 c\u00f3 m\u00e0u cam ho\u1eb7c n\u00e2u \u0111\u1ecf, khi ch\u00fang ch\u1ee9a \u00edt nh\u1ea5t 85% \u0111\u1ed3ng. Nh\u1eefng lo\u1ea1i \u0111\u1ed3ng n\u00e0y th\u01b0\u1eddng \u0111\u01b0\u1ee3c t\u00ecm th\u1ea5y trong \u0111\u1ed3 trang s\u1ee9c, \u1ed1c v\u00edt trang tr\u00ed ho\u1eb7c h\u1ec7 th\u1ed1ng \u1ed1ng n\u01b0\u1edbc.\u00a0B\u1ea5t k\u1ef3 g\u1ee3i \u00fd c\u1ee7a cam, v\u00e0ng, ho\u1eb7c v\u00e0ng c\u00f3 ngh\u0129a l\u00e0 m\u1eb7t h\u00e0ng l\u00e0 \u0111\u1ed3ng thau, kh\u00f4ng ph\u1ea3i \u0111\u1ed3ng.<\/p>\n

\"C\u00e1ch<\/p>\n

N\u1ebfu h\u1ee3p kim \u0111\u1ed3ng thau g\u1ea7n nh\u01b0 ho\u00e0n to\u00e0n b\u1eb1ng \u0111\u1ed3ng, b\u1ea1n c\u00f3 th\u1ec3 c\u1ea7n so s\u00e1nh n\u00f3 v\u1edbi \u1ed1ng \u0111\u1ed3ng ho\u1eb7c v\u1eadt ph\u1ea9m trang s\u1ee9c.\u00a0N\u1ebfu b\u1ea1n v\u1eabn kh\u00f4ng ch\u1eafc ch\u1eafn, th\u00ec \u0111\u00f3 l\u00e0 \u0111\u1ed3ng ho\u1eb7c \u0111\u1ed3ng thau c\u00f3 h\u00e0m l\u01b0\u1ee3ng \u0111\u1ed3ng cao \u0111\u1ebfn m\u1ee9c s\u1ef1 kh\u00e1c bi\u1ec7t c\u00f3 th\u1ec3 kh\u00f4ng quan tr\u1ecdng.<\/p>\n

X\u00e1c \u0111\u1ecbnh \u0111\u1ed3ng thau kh\u00e1c<\/strong><\/span><\/h4>\n

\u0110\u1ed3ng thau c\u00f3 h\u00e0m l\u01b0\u1ee3ng k\u1ebdm cao c\u00f3 th\u1ec3 tr\u00f4ng v\u00e0ng s\u00e1ng, tr\u1eafng v\u00e0ng v\u00e0 th\u1eadm ch\u00ed tr\u1eafng ho\u1eb7c x\u00e1m. Nh\u1eefng h\u1ee3p kim n\u00e0y kh\u00f4ng ph\u1ed5 bi\u1ebfn; v\u00ec ch\u00fang kh\u00f4ng th\u1ec3 ho\u1ea1t \u0111\u1ed9ng \u0111\u01b0\u1ee3c b\u1eb1ng m\u00e1y. Nh\u01b0ng b\u1ea1n c\u00f3 th\u1ec3 t\u00ecm th\u1ea5y ch\u00fang trong \u0111\u1ed3 trang s\u1ee9c.<\/p>\n

T\u00ecm hi\u1ec3u\u00a0H\u1ee3p Kim C\u1ee7a \u0110\u1ed3ng V\u1edbi Thi\u1ebfc C\u00f3 M\u00e0u G\u00ec? C\u00f4ng D\u1ee5ng C\u1ee7a H\u1ee3p Kim \u0110\u1ed3ng V\u00e0 Thi\u1ebfc<\/a><\/strong><\/em><\/p>\n

Ph\u01b0\u01a1ng ph\u00e1p 2: <\/strong>Ph\u01b0\u01a1ng ph\u00e1p x\u00e1c \u0111\u1ecbnh kh\u00e1c<\/strong><\/span><\/h3>\n

Ki\u1ec3m tra kim lo\u1ea1i v\u00e0 l\u1eafng nghe \u00e2m thanh<\/strong><\/span><\/h4>\n

V\u00ec \u0111\u1ed3ng kh\u00e1 m\u1ec1m n\u00ean s\u1ebd t\u1ea1o ra \u00e2m thanh tr\u00f2n, t\u1eaft ti\u1ebfng. M\u1ed9t c\u00e1ch th\u1eed nghi\u1ec7m tr\u1edf l\u1ea1i v\u00e0o n\u0103m 1867 \u0111\u00e3 m\u00f4 t\u1ea3 \u00e2m thanh c\u1ee7a \u0111\u1ed3ng l\u00e0 “ch\u1ebft”, trong khi \u0111\u1ed3ng thau ph\u00e1t ra “ti\u1ebfng chu\u00f4ng r\u00f5 r\u00e0ng”.<\/p>\n

\"C\u00e1ch<\/p>\n

\u0110i\u1ec1u n\u00e0y c\u00f3 th\u1ec3 kh\u00f3 \u0111\u00e1nh gi\u00e1 n\u1ebfu kh\u00f4ng c\u00f3 kinh nghi\u1ec7m, nh\u01b0ng h\u1ecdc n\u00f3 c\u00f3 th\u1ec3 h\u1eefu \u00edch cho s\u1edf th\u00edch s\u01b0u t\u1eadp \u0111\u1ed3 c\u1ed5 ho\u1eb7c ph\u1ebf li\u1ec7u.<\/p>\n

\u0110i\u1ec1u n\u00e0y ho\u1ea1t \u0111\u1ed9ng t\u1ed1t nh\u1ea5t cho c\u00e1c v\u1eadt kim lo\u1ea1i d\u00e0y, r\u1eafn.<\/p>\n

H\u00e3y t\u00ecm m\u00e3 \u0111\u01b0\u1ee3c \u0111\u00f3ng d\u1ea5u<\/strong><\/span><\/h4>\n

C\u00e1c \u0111\u1ed3 v\u1eadt b\u1eb1ng \u0111\u1ed3ng \u0111\u01b0\u1ee3c l\u00e0m cho m\u1ee5c \u0111\u00edch c\u00f4ng nghi\u1ec7p th\u01b0\u1eddng c\u00f3 m\u00e3 \u0111\u01b0\u1ee3c \u0111\u00f3ng d\u1ea5u tr\u00ean ch\u00fang \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh h\u1ee3p kim ch\u00ednh x\u00e1c. Trong c\u1ea3 hai h\u1ec7 th\u1ed1ng B\u1eafc M\u1ef9 v\u00e0 Ch\u00e2u \u00c2u, m\u00e3 cho \u0111\u1ed3ng thau b\u1eaft \u0111\u1ea7u b\u1eb1ng ch\u1eef C v\u00e0 \u0111\u01b0\u1ee3c theo sau b\u1edfi m\u1ed9t s\u1ed1 s\u1ed1. \u0110\u1ed3ng th\u01b0\u1eddng kh\u00f4ng \u0111\u01b0\u1ee3c d\u00e1n nh\u00e3n; nh\u01b0ng n\u1ebfu b\u1ea1n mu\u1ed1n ch\u1eafc ch\u1eafn, h\u00e3y ki\u1ec3m tra k\u1ef9 m\u00e3 v\u1edbi h\u01b0\u1edbng d\u1eabn nhanh n\u00e0y:<\/p>\n

\"H\u00e3y<\/p>\n

\u2013 H\u1ec7 th\u1ed1ng UNS \u1edf B\u1eafc M\u1ef9 s\u1eed d\u1ee5ng nh\u00e3n b\u1eb1ng \u0111\u1ed3ng b\u1eaft \u0111\u1ea7u b\u1eb1ng C2, C3 ho\u1eb7c C4 ho\u1eb7c n\u1eb1m gi\u1eefa C83300 v\u00e0 C89999. \u0110\u1ed3ng, n\u1ebfu \u0111\u01b0\u1ee3c d\u00e1n nh\u00e3n, c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng m\u00e3 t\u1eeb C10100 \u0111\u1ebfn C15999 v\u00e0 C80000, C81399. Hai ch\u1eef s\u1ed1 cu\u1ed1i th\u01b0\u1eddng b\u1ecb b\u1ecf.<\/p>\n

\u2013 Trong h\u1ec7 th\u1ed1ng ch\u00e2u \u00c2u hi\u1ec7n t\u1ea1i, c\u1ea3 \u0111\u1ed3ng v\u00e0 \u0111\u1ed3ng thau \u0111\u1ec1u b\u1eaft \u0111\u1ea7u b\u1eb1ng C. \u0110\u1ed3ng thau k\u1ebft th\u00fac b\u1eb1ng ch\u1eef L, M, N, P ho\u1eb7c R, trong khi \u0111\u1ed3ng k\u1ebft th\u00fac b\u1eb1ng A, B, C ho\u1eb7c D.<\/p>\n

\u2013 \u0110\u1ed3ng thau c\u0169 c\u00f3 th\u1ec3 kh\u00f4ng ph\u00f9 h\u1ee3p v\u1edbi c\u00e1c h\u1ec7 th\u1ed1ng n\u00e0y.\u00a0M\u1ed9t s\u1ed1 ti\u00eau chu\u1ea9n c\u0169 c\u1ee7a ch\u00e2u \u00c2u (\u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng kh\u00e1 g\u1ea7n \u0111\u00e2y) li\u1ec7t k\u00ea c\u00e1c k\u00fd hi\u1ec7u ph\u1ea7n t\u1eed theo sau l\u00e0 t\u1ef7 l\u1ec7 ph\u1ea7n tr\u0103m.\u00a0B\u1ea5t c\u1ee9 th\u1ee9 g\u00ec c\u00f3 ch\u1ee9a “Cu” v\u00e0 “Zn” \u0111\u1ec1u \u0111\u01b0\u1ee3c coi l\u00e0 \u0111\u1ed3ng thau.<\/p>\n

Ki\u1ec3m tra \u0111\u1ed9 c\u1ee9ng c\u1ee7a kim lo\u1ea1i<\/strong><\/span><\/h4>\n

\"C\u00e1ch<\/p>\n

C\u00e1ch nh\u1eadn bi\u1ebft va\u0300 th\u1eed kim lo\u1ea1i \u0111\u1ed3ng n\u00e0y th\u01b0\u1eddng kh\u00f4ng qu\u00e1 h\u1eefu \u00edch; v\u00ec \u0111\u1ed3ng thau ch\u1ec9 c\u1ee9ng h\u01a1n \u0111\u1ed3ng m\u1ed9t ch\u00fat. M\u1ed9t s\u1ed1 lo\u1ea1i \u0111\u1ed3ng \u0111\u01b0\u1ee3c x\u1eed l\u00fd \u0111\u1eb7c bi\u1ec7t m\u1ec1m, do \u0111\u00f3 b\u1ea1n c\u00f3 th\u1ec3 c\u00e0o ch\u00fang b\u1eb1ng \u0111\u1ed3ng xu M\u1ef9. \u0110i\u1ec1u n\u00e0y kh\u00f4ng bao gi\u1edd \u0111\u00fang v\u1edbi \u0111\u1ed3ng thau. Tuy nhi\u00ean, trong nhi\u1ec1u tr\u01b0\u1eddng h\u1ee3p, kh\u00f4ng c\u00f3 \u0111\u1ed1i t\u01b0\u1ee3ng thu\u1eadn ti\u1ec7n s\u1ebd l\u00e0m tr\u1ea7y x\u01b0\u1edbc m\u1ed9t \u0111\u1ed1i t\u01b0\u1ee3ng m\u00e0 kh\u00f4ng ph\u1ea3i \u0111\u1ed1i t\u01b0\u1ee3ng kh\u00e1c.<\/p>\n

\u0110\u1ed3ng c\u0169ng d\u1ec5 u\u1ed1n cong h\u01a1n \u0111\u1ed3ng thau; nh\u01b0ng th\u1eadt kh\u00f3 \u0111\u1ec3 \u0111\u01b0a ra k\u1ebft lu\u1eadn ch\u00ednh x\u00e1c t\u1eeb th\u1eed nghi\u1ec7m \u0111\u00f3. \u0110\u1eb7c bi\u1ec7t l\u00e0 kh\u00f4ng l\u00e0m h\u1ecfng v\u1eadt th\u1ec3.<\/p>\n

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Sorry, this entry is only available in Ti\u1ebfng Vi\u1ec7t. For the sake of viewer convenience, the content is shown below in the alternative language. You may click the link to switch the active language. C\u00c1CH NH\u1eacN BI\u1ebeT VA\u0300 TH\u1eec KIM LO\u1ea0I \u0110\u1ed2NG Do t\u00ednh d\u1eabn \u0111i\u1ec7n c\u1ee7a \u0111\u1ed3ng, kim lo\u1ea1i \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng th\u01b0\u1eddng xuy\u00ean … Continue reading C\u00e1ch Nh\u1eadn Bi\u1ebft Va\u0300 Th\u1eed Kim Lo\u1ea1i \u0110\u1ed3ng. C\u00e1ch ph\u00e2n Bi\u1ec7t \u0110\u1ed3ng \u2013 \u0110\u1ed3ng Thau<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":8989,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[],"class_list":["post-8973","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-tin-tuc"],"acf":[],"yoast_head":"\nC\u00e1ch Nh\u1eadn Bi\u1ebft Va\u0300 Th\u1eed Kim Lo\u1ea1i \u0110\u1ed3ng. 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