Ho_2O_3-Y_2O_3对熔融石英晶化性能的影响  

Effect of Ho_2O_3-Y_2O_3 on Crystallization Behavior of Fused Quartz

作　　者：张会芳[1] 卜景龙 申书斌 陈越军 张璞 

机构地区：[1]河北建筑工程学院,张家口075000 [2]河北省无机非金属材料重点实验室,唐山063009 [3]中国轻工业陶瓷研究所,景德镇333000

出　　处：《中国陶瓷》2015年第7期12-15,共4页China Ceramics

基　　金：国家自然科学基金项目(51072046)

摘　　要：以粒径≤0.10 mm的熔融石英粉为主要原料,添加质量比1%﹑2%﹑3%的复合添加剂Ho2O3-Y2O3,以聚乙烯醇溶液为结合剂,试样采用液压机成型,成型压强为50 MPa,试样烧成分别于1300℃﹑1350℃和1400℃埋碳保温1 h,对烧后试样进行了热膨胀率测试及XRD分析,以研究复合添加剂Ho2O3-Y2O3对熔融石英析晶的影响。结果表明:纯熔融石英的晶化程度随烧成温度的升高而不断增大;不同含量复合添加剂Ho2O3-Y2O3对熔融石英高温析晶均有不同程度的抑制作用,引入1%的Ho2O3-Y2O3对熔融石英在1400℃高温时的晶化具有最好的抑制作用。Fused quartz granular（d50=10 μm） was used as principal raw material. Ho2O3-Y2O3 were used as complex additives with dosages of 1%（in mass, similarly hereinafter）, 2% and 3%. Fused quartz ceramic was prepared under pressure of 50 MPa by a hydraulic press and then fabricated in reduction atmosphere at 1300 ℃, 1350 ℃ and 1400 ℃ for 1 h. Effect of Ho2O3-Y2O3 on crystallization behavior of fused quartz ceramic were researched by measurements of thermal expansion ratio and analysis of XRD. The results indicated that crystallization degrees of fused quartz increase further with rise of sintering temperature. Different dosage of Ho2O3-Y2O3 complex additive has the effect of different degrees on inhibiting crystallizati on fused quartz of the samples. Dosages 1% Ho2O3-Y2O3 has outstanding effect of inhibiting crystallization on fused quartz at high temperature 1400 ℃.

关 键 词：熔融石英 晶化 添加剂 氧化钬 氧化钇 

分 类 号：TQ174.42[化学工程—陶瓷工业]