首页|Al2O3粒度对CA6轻质陶瓷材料结构与性能的影响

Al2O3粒度对CA6轻质陶瓷材料结构与性能的影响

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  • 国家科技期刊平台
  • NETL
  • NSTL
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为研究Al2O3粒度对CA6轻质陶瓷材料结构与性能的影响,本文以平均粒径分别为80、61、45和38 μm的α-Al2O3为氧化铝源,以平均粒径为15 μm的轻质碳酸钙为氧化钙源,采用发泡法结合原位烧成工艺,经1 550 ℃保温5 h烧成后获得CA6轻质陶瓷材料,研究不同粒度的Al2O3原料对其物相组成、显微结构和物理性能的影响.结果表明:随着α-Al2O3粒度的减小,CA6轻质陶瓷的线收缩率、体积密度和热导率逐渐变小,显气孔率增大,压缩强度呈先增大后减小的趋势.综合考虑,以平均粒径为45 μm的α-Al2O3为氧化铝源所制试样的综合性能较佳,更能满足使用需求,其显气孔率、热导率和压缩强度分别为87.8％、0.149 W·m-1·K-1和0.29 MPa.
Effects of Al2O3 Particle Sizes on Microstructure and Properties of CA6 Lightweight Ceramic Materials
In order to study the effects of Al2O3 particle sizes on microstructure and properties of CA6 lightweight ceramic materials,lightweight calcium carbonate with an average particle size of 15 μm and α-Al2O3 with average particle sizes of 80,61,45 and 38 μm were used as calcium oxide and alumina sources,respectively.CA6 lightweight ceramic materials were prepared by foaming method combined with in-situ sintering technology after being heated at 1 550 ℃ for 5 h.Effects of Al2O3 starting materials with different particle sizes on their physical properties,phase composition and microstructure were investigated.The results show that with the decrease of α-Al2O3 particle size,the linear shrinkage,bulk density and thermal conductivity of CA6 lightweight ceramic materials gradually decreases,while their apparent porosity gradually increases and their compressive strength increases firstly and then decreases.Comprehensively considered,the specimen prepared by α-Al2O3 with an average particle size of 45 μm as alumina source has better comprehensive performance,and its apparent porosity,thermal conductivity and compressive strength are 87.8％,0.149 W·m-1·K-1 and 0.29 MPa,respectively,which can better meet the needs of application.

CA6 lightweight ceramic materialAl2O3 particle sizephase compositionmicrostructurecompressive strengththermal conductivity

申天姿、李文凤、郭会师、曹金金、侯永改、杜娟

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河南工业大学材料科学与工程学院,郑州 450001

郑州轻工业大学材料与化学工程学院,郑州 450051

CA6轻质陶瓷材料 Al2O3粒度 物相组成 显微结构 压缩强度 热导率

国家自然科学基金河南省科技攻关计划重点项目河南省科技攻关计划重点项目河南工业大学青年骨干教师培育计划

518002122323210223104623210223105121421211

2024

硅酸盐通报
中国硅酸盐学会 中材人工晶体研究院

硅酸盐通报

CSTPCD北大核心
影响因子：0.698
ISSN：1001-1625
年,卷(期)：2024.43(6)