| abstract |
A method produces transparent ceramics having high transmittance and no bubble defects with uniform insertion loss over the entire inner surface thereof. The method comprising the steps of:obtaining a candidate composition containing a binder, optionally a dispersant, and optionally a plasticizer;dissolving the candidate composition in a solvent, then reducing a contained solvent volume to 0.1% by mass or less, and measuring a glass transition temperature;selecting a candidate composition having a glass transition temperature of 25°C or more and 60°C or less as an organic additive composition;preparing the organic additive composition containing the binder, optionally the dispersant, and the plasticizer, and having the composition obtained in the selecting step;pulverizing a raw material for sintering formed from metal oxide powder and the organic additive composition to obtain a pulverized mixture;granulating the pulverized mixture;sintering the granulated mixture to obtain a sintered body; andpressurizing the sintered body.A method produces transparent ceramics having high transmittance and no bubble defects with uniform insertion loss over the entire inner surface thereof. The method comprising the steps of:obtaining a candidate composition containing a binder, optionally a dispersant, and optionally a plasticizer;dissolving the candidate composition in a solvent, then reducing a contained solvent volume to 0.1% by mass or less, and measuring a glass transition temperature;selecting a candidate composition having a glass transition temperature of 25°C or more and 60°C or less as an organic additive composition;preparing the organic additive composition containing the binder, optionally the dispersant, and the plasticizer, and having the composition obtained in the selecting step;pulverizing a raw material for sintering formed from metal oxide powder and the organic additive composition to obtain a pulverized mixture;granulating the pulverized mixture;sintering the granulated mixture to obtain a sintered body; andpressurizing the sintered body. |