D\u00e2y thi\u1ebfc h\u00e0n<\/a><\/span> d\u00f9ng \u0111\u1ec3 h\u00e0n linh ki\u1ec7n \u0111i\u1ec7n t\u1eed b\u1eb1ng tay \u0111\u01b0\u1ee3c c\u1ea5u t\u1ea1o t\u1eeb h\u1ee3p kim thi\u1ebfc v\u00e0 c\u00e1c ch\u1ea5t ph\u1ee5 gia. Trong qu\u00e1 tr\u00ecnh h\u00e0n \u0111i\u1ec7n t\u1eed, d\u00e2y h\u00e0n \u0111\u01b0\u1ee3c \u0103n kh\u1edbp v\u1edbi m\u1ecf h\u00e0n \u0111i\u1ec7n. M\u1ecf h\u00e0n \u0111i\u1ec7n ch\u1ea5t l\u01b0\u1ee3ng cao cung c\u1ea5p nhi\u1ec7t n\u00f3ng ch\u1ea3y \u1ed5n \u0111\u1ecbnh v\u00e0 li\u00ean t\u1ee5c, d\u00e2y h\u00e0n \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng l\u00e0m ch\u1ea5t \u0111\u1ed9n. Kim lo\u1ea1i \u0111\u01b0\u1ee3c th\u00eam v\u00e0o b\u1ec1 m\u1eb7t v\u00e0 khe h\u1edf c\u1ee7a th\u00e0nh ph\u1ea7n \u0111i\u1ec7n t\u1eed, v\u00e0 th\u00e0nh ph\u1ea7n \u0111i\u1ec7n t\u1eed c\u1ed1 \u0111\u1ecbnh tr\u1edf th\u00e0nh th\u00e0nh ph\u1ea7n ch\u00ednh c\u1ee7a h\u00e0n. Th\u00e0nh ph\u1ea7n c\u1ee7a d\u00e2y h\u00e0n kh\u00f4ng th\u1ec3 t\u00e1ch r\u1eddi ch\u1ea5t l\u01b0\u1ee3ng c\u1ee7a d\u00e2y h\u00e0n, \u0111i\u1ec1u n\u00e0y s\u1ebd \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn c\u00e1c t\u00ednh ch\u1ea5t h\u00f3a h\u1ecdc, c\u01a1 h\u1ecdc v\u00e0 v\u1eadt l\u00fd c\u1ee7a d\u00e2y h\u00e0n.<\/span><\/p>\nD\u00e2y h\u00e0n kh\u00f4ng c\u00f3 ch\u1ea5t ph\u1ee5 gia kh\u00f4ng th\u1ec3 h\u00e0n c\u00e1c linh ki\u1ec7n \u0111i\u1ec7n t\u1eed v\u00ec n\u00f3 kh\u00f4ng c\u00f3 t\u00ednh th\u1ea5m \u01b0\u1edbt v\u00e0 kh\u1ea3 n\u0103ng gi\u00e3n n\u1edf. Tuy nhi\u00ean, qu\u00e1 tr\u00ecnh h\u00e0n s\u1ebd t\u1ea1o ra tia l\u1eeda v\u00e0 c\u00e1c m\u1ed1i n\u1ed1i h\u00e0n s\u1ebd kh\u00f4ng \u0111\u01b0\u1ee3c h\u00ecnh th\u00e0nh t\u1ed1t, hi\u1ec7u su\u1ea5t c\u1ee7a c\u00e1c ch\u1ea5t ph\u1ee5 gia \u0111\u01b0\u1ee3c ph\u00e1t tri\u1ec3n trong m\u1ed9t th\u1eddi gian d\u00e0i s\u1ebd \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn hi\u1ec7u su\u1ea5t c\u1ee7a d\u00e2y h\u00e0n.<\/span><\/p>\n