溶胶-凝胶法合成ZrO2-8%Y2O3纳米粉体相转变及晶粒生长行为研究

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摘要以醋酸为水解催化剂和螯合剂，采用溶胶-凝胶法合成ZrO2-8%Y2O3 （8YSZ）粉末，利用XRD、SEM方法研究纳米8YSZ粉末热处理后的相成分、晶粒尺寸和形貌的变化，并分析纳米8YSZ粉末中的晶粒生长行为。结果表明：溶剂中添加乙醇不利于纳米8YSZ粉末四方相（t）的稳定；在400~1200℃范围内，随着热处理温度的升高晶粒尺寸逐渐增大；然而纳米8YSZ粉末的晶粒生长活化能在低温区和高温区有所不同，热处理温度低于800℃时的晶粒生长活化能（9.71kJ/mol）明显小于热处理温度高于800℃时的晶粒生长活化能（43.06kJ/mol），这有利于t-8YSZ在低温下结晶，在高温下保持四方相的稳定性。

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	袁武华
	黄巧玲
	周永江
	黄文质

关键词 ：溶胶-凝胶, 纳米, ZrO2-8%Y2O3粉末, 相转变, 晶粒生长行为

引用本文:

袁武华，黄巧玲，周永江，黄文质. 溶胶-凝胶法合成ZrO₂-8%Y₂O₃纳米粉体相转变及晶粒生长行为研究[J]. 航空制造技术, 2014, 57(6): 122-125.

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http://www.amte.net.cn/CN/ 或 http://www.amte.net.cn/CN/Y2014/V57/I6/122

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