酸処理によるセラミック成形体中の異物除去 : 光コネクタ用ジルコニアセラミックキャピラリを例として

概要

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The removal of metallic and/or oxide inclusions in green bodies for PSZ ceramic capillary contaminated in the forming process by nitric acid treatment was investigated. The main inclusions contaminated in the forming process was Fe, and it changed to Fe_20_3 and/ or Fe_30_4 by oxidation in the calcining process. For infiltration of the acid and handling, the specimen with relative density below 70% having open pores and bending strength above 70 MPa was desired. For the ease of removing of inclusions, it was desired that inclusions remained as metallic state. These conditions were achieved by calcining specimens in the temperature range from 600° to 800℃ for 1 h. PSZ ceramic capillaries for optical-fiber connector with Weibull modulus of l0.24 and bending strength of 925 MPa were fabricated by sintering at 1450℃ in air for 12 h and HIPping at 1400℃ and 1000 atm in an Ar atmosphere for 2 h after the acid treatment.
社団法人日本セラミックス協会の論文
1991-03-01