| 摘要 |
PURPOSE: A ceramic nosepiece of glasses and its preparation method are provided, to solve the problem that a nose pad and a bridle iron are corroded or discolored by sweat and the problem that the space between the nose pad and the bridle iron becomes dirty by impurities. CONSTITUTION: The method comprises the steps of mixing 80-90 wt% of ceramic powder and 10-20 wt% of a binder, heating the mixture at 500 deg.C and stirring the heated one; pouring the mixture into a mold where a nose pad part(32a) and a bridle iron part(34a) are formed in a body, and injection molding the mixture at 500-600 deg.C; slowly heating the obtained ceramic nosepiece(30a) at 300 deg.C to remove a binder component by oxidation; removing the burr of the ceramic nosepiece; sintering the ceramic nosepiece at 1,670 deg.C for 12-17 hours; and polishing the ceramic nosepiece. Preferably the binder is a mixture of paraffin and poly(vinyl acetate) in the ratio of 1;1 by weight. Preferably the mixture comprises further about 0.02 wt% of manganese.
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