???? ??????? ?? ???? ????? ???? ????????????? weihua (????? ???? ?????????) ?????? ????? ?????? ????? ???? ??????? ?????? ???? ????????? ?????????.

1. ????? ????

(????? ???? ??? ?????? ?????? ?????? ?????????)

(1) ???????:

?? ?? ???? ???????? ??????? ?????? ?? ???? ?? ???? ?????? ?? ????? ?????? ????? ??????? ????? ???? ?????? ??? ?????.

(2) ????:

????? ???? ???????? ?????? ????? ?????? ????? ??????? ???????????, ????????? ?????? ?????? ?????? ??????? ??????? ????? ????? ????? ??????.

(3) ?????:

?????????? ????? ????? ????? ?????? ?????? ????? ???? ??????? ????? ????? ????? ???? ????? ????? ???????.

2. ????:

???? ??? ?????? ?????? ????????. ?????, ?? ?? ????? ???? ????? ???????, ????? ?????, ????? ????? ????? ??? ???? ?? ???? ???? ???? ??????.

?????? 6063 ?????? ?????? ?????? ????? ????? ????? ??????? ????? ??????? ?????? ?????? ????. ????? ????? ???? ?? ?????? ?????? ?????? ???? ?????? ????? ????.

3. ????

(??? ??? ?????? ????? ?? ?????), ?????? ?????? ????????? ?????, ??????? ???? ??????? ???? ????, ?? ???? ??????? ????? ????? ??? ???? ???? ?????? ?? ?????? ???????? ?? ?????????, ?????? ???? ????? ????? ???? ???.

?????? ?????? ??? ??????:

(1) ????? ????? ???? ????:

???? ????? ?????? ?????? ?? ????????? ?????? ??? ???? ?? ??????? ??? ????? ?? ???? ?????, ??? ????? ??? ?????? ???????? ???? ??????. ???? ????? ?? ???? ????? ???? ?? ??.

(2) ????? ?????:

???? ????? ????? ???? ????, ?????? ?????????? ???????, ????? ????? ????? ?? ??? ????, ??????? ??? ???? ??? ????? AL2O3 ?????, ??????? ?????.

(3) ????? ?????:

????????? ?? ??? ??????? ???????? ?????? ???? ????? ????? ????? ??? ???? ?? ?????? ??? ?????, ??? ??????? ????? ?? ??? ???????. ??? ?????? ??? ??? ??? ?????, ?????? ?????? ???? ?? ??? ?????? ???? ??????, ?????? ????? ??? ????, ??? ??? ?????, ?????? ????? ????? ??????? ????? ???? (??? ???) ???? ????? ????, ????: ??? ????, ??????, ??? ????????.