Al2O3粒度对CA6轻质陶瓷材料结构与性能的影响

硅酸盐通报 ›› 2024, Vol. 43 ›› Issue (6): 2250-2255.

Al₂O₃粒度对CA₆轻质陶瓷材料结构与性能的影响

申天姿¹, 李文凤¹, 郭会师², 曹金金¹, 侯永改¹, 杜娟¹

1.河南工业大学材料科学与工程学院,郑州 450001;
2.郑州轻工业大学材料与化学工程学院,郑州 450051

收稿日期:2023-11-21 修订日期:2024-02-20 出版日期:2024-06-15 发布日期:2024-06-18
通信作者: 李文凤,博士,副教授。E-mail:wenfeng1128@126.com
作者简介:申天姿(1999—),女,硕士研究生。主要从事轻质陶瓷耐火材料的研究。E-mail:201826010330@stu.haut.edu.cn
基金资助:
国家自然科学基金(5180021223);河南省重点科技攻关项目(232102231046,232102231051);河南工业大学青年骨干教师培育计划(21421211)

Effects of Al₂O₃ Particle Sizes on Microstructure and Properties of CA₆ Lightweight Ceramic Materials

SHEN Tianzi¹, LI Wenfeng¹, GUO Huishi², CAO Jinjin¹, HOU Yonggai¹, DU Juan¹

1. School of Materials Science and Engineering, Henan University of Technology, Zhengzhou 450001, China;
2. School of Materials and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou 450051, China

Received:2023-11-21 Revised:2024-02-20 Online:2024-06-15 Published:2024-06-18

摘要/Abstract

摘要： 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。

关键词: 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

Abstract: 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.

Key words: CA₆ lightweight ceramic material, Al₂O₃ particle size, phase composition, microstructure, compressive strength, thermal conductivity

中图分类号:

TQ175

申天姿, 李文凤, 郭会师, 曹金金, 侯永改, 杜娟. Al₂O₃粒度对CA₆轻质陶瓷材料结构与性能的影响[J]. 硅酸盐通报, 2024, 43(6): 2250-2255.

SHEN Tianzi, LI Wenfeng, GUO Huishi, CAO Jinjin, HOU Yonggai, DU Juan. Effects of Al₂O₃ Particle Sizes on Microstructure and Properties of CA₆ Lightweight Ceramic Materials[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2024, 43(6): 2250-2255.

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Al₂O₃粒度对CA₆轻质陶瓷材料结构与性能的影响

Effects of Al₂O₃ Particle Sizes on Microstructure and Properties of CA₆ Lightweight Ceramic Materials

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