氧化铝源对CA6多孔材料相组成和显微结构的影响

硅酸盐通报 ›› 2021, Vol. 40 ›› Issue (3): 1038-1045.

氧化铝源对CA₆多孔材料相组成和显微结构的影响

康国卫¹, 刘馨¹, 吴然¹, 汪涤², 李莹², 刘新红¹, 贾全利¹

1.郑州大学,河南省高温功能材料重点实验室,郑州 450052;
2.河南建筑材料研究设计院有限责任公司,郑州 450002

收稿日期:2020-12-09 修回日期:2021-01-08 出版日期:2021-03-15 发布日期:2021-04-13
通讯作者: 贾全利,博士,教授。E-mail:jiaquanli@zzu.edu.cn
作者简介:康国卫(1996—),男,硕士研究生。主要从事高温功能材料的研究。E-mail:zzu17660440139@163.com
基金资助:
国家自然科学基金(51872266);河南省自然科学基金(202300410473)

Influence of Alumina Source on Phase Composition and Microstructure of CA₆ Porous Materials

KANG Guowei¹, LIU Xin¹, WU Ran¹, WANG Di², LI Ying², LIU Xinhong¹, JIA Quanli¹

1. Henan Key Laboratory of High Temperature Functional Ceramics, Zhengzhou University, Zhengzhou 450052, China;
2. Henan Building Materials Research and Design Institute Co., Ltd., Zhengzhou 450002, China

Received:2020-12-09 Revised:2021-01-08 Online:2021-03-15 Published:2021-04-13

摘要/Abstract

摘要： 用Al(OH)₃、Al₂O₃微粉(uf-Al₂O₃)、工业Al₂O₃粉作为氧化铝源,CaCO₃为钙源,通过高温固相反应合成了六铝酸钙(CA₆)材料,研究了氧化铝原料对材料物相组成、显微结构和性能的影响。结果表明,以Al(OH)₃、Al₂O₃微粉、工业Al₂O₃为氧化铝源的试样在1 300 ℃时开始有CA₆相生成,各试样固相反应结束温度为1 500 ℃,继续提高烧成温度对物相组成没有影响。反应生成的CA₆显微形貌因氧化铝原料不同而不同,以Al(OH)₃为氧化铝源时,CA₆的显微形貌多为片状结构;以工业Al₂O₃为原料时,CA₆的显微形貌多为板片状和颗粒状;但以uf-Al₂O₃为氧化铝源时,CA₆的显微形貌则多为等轴状晶粒。以uf-Al₂O₃为氧化铝源时,制备的材料耐压强度和体积密度最高,气孔率最低;以Al(OH)₃为氧化铝源时,制备的材料耐压强度和体积密度最低,气孔率最高。

关键词: 六铝酸钙, 多孔材料, 氧化铝源, 物相组成, 固相反应

Abstract: CA₆ materials have been synthesized by high temperature solid state reaction using CaCO₃ as calcium source combined with Al(OH)₃, uf-Al₂O₃ and industrial Al₂O₃ as alumina sources. Effects of alumina sources on phase composition, microstructure and properties of CA₆ materials were studied. The results show that CA₆ forms at 1 300 ℃ using Al(OH)₃ and uf-Al₂O₃ as alumina sources. Solid state reaction temperature of samples finishes at 1 500 ℃. Further increasing of firing temperature has no effect on the phase composition. The microstructure of CA₆ produced by the reaction is changed with different alumina sources. When Al(OH)₃ is used as the alumia source, the microstructure of CA₆ is mostly platy. However, as used industrial Al₂O₃ as the alumia source, the microstructure of CA₆ is mostly plate-like and granular, but the microstructure of CA₆ is mostly equiaxed grains by using uf-Al₂O₃ as precursor. When used uf-Al₂O₃ as the source, the compressive strength and bulk density of the materials are the highest, and the porosity is the lowest. As used Al(OH)₃ as alumina source, the compressive strength and bulk density of the materials are the lowest, and the porosity is the highest.

Key words: calcium hexaaluminate, porous material, alumina source, phase composition, solid state reaction

中图分类号:

TQ175

康国卫, 刘馨, 吴然, 汪涤, 李莹, 刘新红, 贾全利. 氧化铝源对CA₆多孔材料相组成和显微结构的影响[J]. 硅酸盐通报, 2021, 40(3): 1038-1045.

KANG Guowei, LIU Xin, WU Ran, WANG Di, LI Ying, LIU Xinhong, JIA Quanli. Influence of Alumina Source on Phase Composition and Microstructure of CA₆ Porous Materials[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2021, 40(3): 1038-1045.

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氧化铝源对CA₆多孔材料相组成和显微结构的影响

Influence of Alumina Source on Phase Composition and Microstructure of CA₆ Porous Materials

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