二步烧结法制备锆酸钙材料的研究  

Preparation of calcium zirconate materials by two-step sintering

作　　者：王猛 温淑华 于景坤 袁磊 温天朋 Wang Meng;Wen Shuhua;Yu Jingkun;Yuan Lei;Wen Tianpeng(不详;School of Metallurgy,Northeastern University,Shenyang 110819,Liaoning,China)

机构地区：[1]东北大学冶金学院,辽宁沈阳110819 [2]成都国营锦江机器厂,四川成都610000

出　　处：《耐火材料》2024年第3期204-207,共4页Refractories

基　　金：国家自然科学基金重点项目(No.51932008);中央高校基本科研业务费(N2225048)。

摘　　要：为提高锆酸钙材料的致密度,以碳酸钙和氧化锆为原料,采用预烧—破碎—压制成型—高温烧成的二步烧结法制备了锆酸钙(CaZrO_(3))材料,主要研究预烧温度(分别为1200、1300、1400、1500℃)对CaZrO_(3)材料显微结构和常温性能的影响。结果表明:1)采取二步烧结法能使原料分布均匀,反应彻底,避免了氧化锆相变导致的试样膨胀开裂;2)预烧温度为1400℃时,试样的综合性能最优,主晶相CaZrO_(3)可达99%(w),平均晶粒尺寸为4~5μm,显气孔率为1.6%,体积密度为4.40 g·cm^(-3),常温耐压强度为590 MPa。In order to improve their density,calcium zirconate(CaZrO_(3))materials were prepared with calcium carbonate and zirconia as raw materials by the two-step sintering method:pre-firing—crushing—pressing—high temperature sintering.The effects of the pre-firing temperature(1200,1300,1400,and 1500℃)on the microstructure and cold properties of the CaZrO_(3)materials were studied.The results show that:(1)the two-step sintering method can make the distribution of raw materials uniform and the reaction thorough,and avoid the expansion cracking of the sample caused by zirconia phase transformation;(2)when the pre-firing temperature is 1400℃,the sample has the optimal comprehensive properties:the main crystalline phase CaZrO_(3)reaches 99 mass%,the average grain size is 4-5μm,the apparent porosity is 1.6%,the bulk density is 4.40 g·cm^(-3),and the cold compressive strength is 590 MPa.

关 键 词：锆酸钙 预烧温度 二步烧结法 致密度 线收缩率 常温耐压强度 

分 类 号：TQ175[化学工程—硅酸盐工业]