Na-Si-O-N系及びNa-Al-Si-O-N系オキシトナイトライドガラスの生成ならびに化学的耐久性

概要

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Using oxide glasses of compositions xNa_2O・(100-x) SiO_2(x=20-50 in mol) and 40Na_2O・(60-y)SiO_2・yAl_2O_3(y=5, 10 in mol) as base glass, Na-Si-O-N and Na-Al-Si-O-N oxynitride glasses were prepared by melting powder mixture of oxide glass and Si_3N_4 or AlN, and the effects of the base oxide glass composition on the glass forming ability, the amount of incorporated nitrogen and the chemical durability of oxynitride glasses were studied. It was found in Na-Si-O-N glasses that the lower Na_2O content is favorable for the formation of nitrided glass, giving larger glass forming regions. Retained nitrogen content decreased with increasing Na_2O content in Na-Si-O-N glasses and with increasing Al_2O_3 content in Na-Al-Si-O-N glasses. Chemical durabilily of Na-Si-O-N glass in-creased with increasing of nitrogen content for any Na_2O content of the base glass. For Na-Al-Si-O-N system, however, nitrogen incorporation increased or decreased chemical durability, depending on the Al_2O_3 content and nitrogen content in the glasses or had no appreciable effect.
社団法人日本セラミックス協会の論文
1992-06-01