{"id":2957,"date":"2024-05-06T09:00:00","date_gmt":"2024-05-06T01:00:00","guid":{"rendered":"https:\/\/globalquartztube.com\/?p=2957"},"modified":"2024-06-26T20:49:52","modified_gmt":"2024-06-26T12:49:52","slug":"hydroxyl-groups-in-quartz-tubes","status":"publish","type":"post","link":"https:\/\/globalquartztube.com\/vi\/hydroxyl-groups-in-quartz-tubes\/","title":{"rendered":"Nh\u00f3m hydroxyl trong \u1ed1ng th\u1ea1ch anh"},"content":{"rendered":"

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Hydroxyl trong th\u1ee7y tinh th\u1ea1ch anh<\/strong><\/h2><\/div>\n\n\n\n

Hydroxyl h\u00f2a tan trong th\u1ee7y tinh th\u1ea1ch anh \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 hydroxyl. Hydroxyl l\u00e0 t\u1ea1p ch\u1ea5t ch\u00ednh trong th\u1ee7y tinh th\u1ea1ch anh v\u00e0 c\u00e1c y\u1ebfu t\u1ed1 ch\u00ednh \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn h\u00e0m l\u01b0\u1ee3ng c\u1ee7a n\u00f3 l\u00e0 nguy\u00ean li\u1ec7u th\u00f4, quy tr\u00ecnh v\u00e0 ph\u01b0\u01a1ng ph\u00e1p s\u1ea3n xu\u1ea5t. V\u00ec h\u00e0m l\u01b0\u1ee3ng hydroxyl trong th\u1ee7y tinh th\u1ea1ch anh thay \u0111\u1ed5i n\u00ean hi\u1ec7u su\u1ea5t c\u1ee7a th\u1ee7y tinh c\u0169ng thay \u0111\u1ed5i. H\u00e0m l\u01b0\u1ee3ng hydroxyl t\u0103ng d\u1eabn \u0111\u1ebfn gi\u1ea3m \u0111\u1ed9 nh\u1edbt, m\u1eadt \u0111\u1ed9 v\u00e0 ch\u1ec9 s\u1ed1 kh\u00fac x\u1ea1, \u0111\u1ed3ng th\u1eddi t\u0103ng h\u1ec7 s\u1ed1 h\u1ea5p th\u1ee5 v\u00e0 gi\u00e3n n\u1edf h\u1ed3ng ngo\u1ea1i.<\/p>\n\n\n\n

Kh\u1eed hydroxyl h\u00f3a<\/strong><\/h2><\/div>\n\n\n\n

D\u1ef1a tr\u00ean ho\u1ea1t \u0111\u1ed9ng c\u1ee7a hydroxyl trong th\u1ee7y tinh th\u1ea1ch anh, c\u00f3 th\u1ec3 chia th\u00e0nh hai lo\u1ea1i: th\u1ee7y tinh th\u1ea1ch anh \u0111\u01b0\u1ee3c s\u1ea3n xu\u1ea5t trong m\u00f4i tr\u01b0\u1eddng oxy h\u00f3a v\u00e0 th\u1ee7y tinh th\u1ea1ch anh n\u00f3ng ch\u1ea3y trong m\u00f4i tr\u01b0\u1eddng kh\u1eed. Hydroxyl \u1edf d\u1ea1ng tr\u01b0\u1edbc kh\u00f3 lo\u1ea1i b\u1ecf b\u1eb1ng c\u00e1ch \u0111un n\u00f3ng, trong khi \u1edf d\u1ea1ng th\u1ee9 hai th\u00ec d\u1ec5 d\u00e0ng lo\u1ea1i b\u1ecf h\u01a1n.<\/p>\n\n\n\n

Th\u1ee7y tinh th\u1ea1ch anh \u0111\u01b0\u1ee3c s\u1ea3n xu\u1ea5t trong m\u00f4i tr\u01b0\u1eddng oxy h\u00f3a bao g\u1ed3m:<\/p>\n\n\n\n

    \n
  1. Th\u1ee7y tinh th\u1ea1ch anh t\u1ed5ng h\u1ee3p<\/strong>: Silicon tetrachloride b\u1ecb ph\u00e2n h\u1ee7y nhi\u1ec7t trong ng\u1ecdn l\u1eeda hydro-oxy, v\u1edbi h\u00e0m l\u01b0\u1ee3ng hydroxyl kho\u1ea3ng 1000-2000 ppm.<\/li>\n\n\n\n
  2. Th\u1ee7y tinh th\u1ea1ch anh tinh ch\u1ebf b\u1eb1ng kh\u00ed<\/strong>: B\u1ed9t th\u1ea1ch anh tan ch\u1ea3y trong ng\u1ecdn l\u1eeda hydro-oxy, c\u00f3 h\u00e0m l\u01b0\u1ee3ng hydroxyl 100-200 ppm.<\/li>\n\n\n\n
  3. Th\u1ee7y tinh th\u1ea1ch anh plasma<\/strong>: B\u1ed9t th\u1ea1ch anh tan ch\u1ea3y trong ng\u1ecdn l\u1eeda plasma, c\u00f3 h\u00e0m l\u01b0\u1ee3ng hydroxyl 20-30 ppm.<\/li>\n\n\n\n
  4. Th\u1ea1ch anh n\u00f3ng ch\u1ea3y<\/strong>: B\u1ed9t th\u1ea1ch anh tan ch\u1ea3y trong kh\u00f4ng kh\u00ed, c\u00f3 h\u00e0m l\u01b0\u1ee3ng hydroxyl 300-500 ppm.<\/li>\n<\/ol>\n\n\n\n

    Lo\u1ea1i hydroxyl c\u1ee7a th\u1ee7y tinh th\u1ea1ch anh n\u00e0y r\u1ea5t kh\u00f3 lo\u1ea1i b\u1ecf b\u1eb1ng c\u00e1ch x\u1eed l\u00fd nhi\u1ec7t v\u00e0 ch\u1ec9 kh\u1eed hydroxyl r\u00f5 r\u1ec7t \u1edf nhi\u1ec7t \u0111\u1ed9 k\u1ebft tinh \u1edf kho\u1ea3ng 1350 \u0111\u1ed9 C.<\/p>\n\n\n\n

    Th\u1ee7y tinh th\u1ea1ch anh tan ch\u1ea3y trong b\u1ea7u kh\u00f4ng kh\u00ed gi\u1ea3m<\/strong>:<\/h2><\/div>\n\n\n\n

    Trong kh\u00ed quy\u1ec3n hydro, h\u00e0m l\u01b0\u1ee3ng hydroxyl l\u00e0 100-200 ppm; \u0111un n\u00f3ng tr\u00ean 900 \u0111\u1ed9 C c\u00f3 th\u1ec3 lo\u1ea1i b\u1ecf h\u1ea7u h\u1ebft hydroxyl. Trong \u0111i\u1ec1u ki\u1ec7n helium ho\u1eb7c ch\u00e2n kh\u00f4ng, h\u00e0m l\u01b0\u1ee3ng hydroxyl r\u1ea5t th\u1ea5p (d\u01b0\u1edbi 5 ppm).<\/p>\n\n\n\n

    Hydroxyl trong th\u1ee7y tinh th\u1ea1ch anh n\u00f3ng ch\u1ea3y trong kh\u00ed quy\u1ec3n hydro c\u00f3 li\u00ean quan \u0111\u1ebfn c\u00e1c y\u1ebfu t\u1ed1 sau:<\/p>\n\n\n\n

      \n
    1. Li\u00ean quan \u0111\u1ebfn \u0111\u1eb7c t\u00ednh nguy\u00ean li\u1ec7u th\u00f4<\/strong><\/li>\n<\/ol>\n\n\n\n

      M\u1ed9t. N\u01b0\u1edbc h\u00f2a tan; b. N\u01b0\u1edbc tinh th\u1ec3; c. N\u01b0\u1edbc k\u1ebd; b. N\u01b0\u1edbc h\u1ea5p ph\u1ee5 b\u1ec1 m\u1eb7t; \u0111. C\u00e1c t\u1ea1p ch\u1ea5t kh\u00ed-l\u1ecfng;<\/p>\n\n\n\n

      2. Li\u00ean quan \u0111\u1ebfn n\u1ed9i dung v\u00e0 lo\u1ea1i t\u1ea1p ch\u1ea5t nguy\u00ean li\u1ec7u th\u00f4<\/strong><\/p>\n\n\n\n

      M\u1ed9t. Oxit kim lo\u1ea1i ki\u1ec1m; b. Oxit kim lo\u1ea1i ki\u1ec1m th\u1ed5; c. Oxit \u0111\u1ea5t hi\u1ebfm;<\/p>\n\n\n\n

      3. Li\u00ean quan \u0111\u1ebfn t\u00ecnh tr\u1ea1ng n\u00f3ng ch\u1ea3y<\/strong><\/p>\n\n\n\n

      Nhi\u1ec7t \u0111\u1ed9; Th\u1eddi gian; B\u1ea7u kh\u00f4ng kh\u00ed;<\/p>\n\n\n\n

      4. Li\u00ean quan \u0111\u1ebfn \u0111i\u1ec1u ki\u1ec7n kh\u1eed hydroxyl h\u00f3a<\/strong><\/p>\n\n\n\n

      M\u00f4i tr\u01b0\u1eddng, m\u1ee9c \u0111\u1ed9 ch\u00e2n kh\u00f4ng; Th\u1eddi gian; Nhi\u1ec7t \u0111\u1ed9;<\/p>\n\n\n\n

      Th\u1ee7y tinh th\u1ea1ch anh n\u00f3ng ch\u1ea3y l\u1ea1i \u0111\u01b0\u1ee3c t\u1ea1o ra trong m\u00f4i tr\u01b0\u1eddng oxy h\u00f3a trong m\u00f4i tr\u01b0\u1eddng hydro cho th\u1ea5y kh\u00f4ng c\u00f3 s\u1ef1 thay \u0111\u1ed5i v\u1ec1 \u0111\u1ec9nh h\u1ea5p th\u1ee5 hydroxyl \u1edf m\u1ee9c 2,73 micron; \u0111i\u1ec1u n\u00e0y cho th\u1ea5y nhi\u1ec7t \u0111\u1ed9 n\u00f3ng ch\u1ea3y kh\u00f4ng ph\u1ea3i l\u00e0 nguy\u00ean nh\u00e2n d\u1eabn \u0111\u1ebfn s\u1ef1 kh\u00e1c bi\u1ec7t v\u1ec1 hi\u1ec7u su\u1ea5t kh\u1eed hydroxyl gi\u1eefa hai lo\u1ea1i th\u1ee7y tinh.<\/p>\n\n\n\n

      Th\u1ee7y tinh th\u1ea1ch anh d\u1ea1ng b\u1ed9t tan ch\u1ea3y trong m\u00f4i tr\u01b0\u1eddng oxy h\u00f3a (k\u00edch th\u01b0\u1edbc h\u1ea1t 0,2\u20130,05mm) cho th\u1ea5y s\u1ef1 thay \u0111\u1ed5i \u0111\u00e1ng k\u1ec3 v\u1ec1 \u0111\u1ec9nh hydroxyl \u1edf m\u1ee9c 2,73 micron sau khi tan ch\u1ea3y l\u1ea1i trong m\u00f4i tr\u01b0\u1eddng hydro, gi\u00fap lo\u1ea1i b\u1ecf hydroxyl d\u1ec5 d\u00e0ng h\u01a1n v\u00e0 hi\u1ec7u su\u1ea5t c\u1ee7a n\u00f3 t\u01b0\u01a1ng t\u1ef1 nh\u01b0 th\u1ea1ch anh th\u1ee7y tinh n\u00f3ng ch\u1ea3y trong m\u00f4i tr\u01b0\u1eddng hydro. \u0110i\u1ec1u n\u00e0y ch\u1ee9ng t\u1ecf r\u1eb1ng k\u00edch th\u01b0\u1edbc h\u1ea1t l\u00e0 m\u1ed9t y\u1ebfu t\u1ed1 quan tr\u1ecdng t\u1ea1o n\u00ean s\u1ef1 kh\u00e1c bi\u1ec7t trong qu\u00e1 tr\u00ecnh kh\u1eed hydroxyl.<\/p>\n\n\n\n

      B\u1ed9t th\u1ee7y tinh th\u1ea1ch anh hydroxyl th\u1ea5p<\/strong> tan ch\u1ea3y l\u1ea1i trong kh\u00ed quy\u1ec3n hydro l\u00e0m t\u0103ng hydroxyl t\u1eeb 3 ppm l\u00ean 100 ppm, cho th\u1ea5y kh\u00ed quy\u1ec3n hydro c\u00f3 th\u1ec3 l\u00e0m t\u0103ng h\u00e0m l\u01b0\u1ee3ng hydroxyl trong th\u1ee7y tinh th\u1ea1ch anh. C\u00e1c kh\u1ed1i th\u1ee7y tinh th\u1ea1ch anh c\u00f3 h\u00e0m l\u01b0\u1ee3ng hydroxyl th\u1ea5p tan ch\u1ea3y l\u1ea1i trong m\u00f4i tr\u01b0\u1eddng hydro cho th\u1ea5y h\u1ea7u nh\u01b0 kh\u00f4ng c\u00f3 s\u1ef1 thay \u0111\u1ed5i v\u1ec1 h\u00e0m l\u01b0\u1ee3ng hydroxyl (3 ppm), cho th\u1ea5y s\u1ef1 t\u01b0\u01a1ng t\u00e1c gi\u1eefa hydro v\u00e0 th\u1ee7y tinh th\u1ea1ch anh b\u1eaft \u0111\u1ea7u t\u1eeb b\u1ec1 m\u1eb7t (th\u1eddi gian n\u00f3ng ch\u1ea3y kho\u1ea3ng 30 ph\u00fat).<\/p>\n\n\n\n

      Ph\u01b0\u01a1ng ph\u00e1p h\u1ea5p th\u1ee5 quang ph\u1ed5 \u0111\u1ec3 t\u00ednh to\u00e1n hydroxyl<\/strong>:<\/h2><\/div>\n\n\n\n

      C\u00f4ng th\u1ee9c t\u00ednh theo GE: C = 910\/T * LOG10(Ta\/Tb) mm-1<\/p>\n\n\n\n