原料组成对多微孔方镁石-镁铁铝复合尖晶石陶瓷显微结构与性能的影响

硅酸盐通报 ›› 2024, Vol. 43 ›› Issue (7): 2672-2679.

所属专题：耐火材料

原料组成对多微孔方镁石-镁铁铝复合尖晶石陶瓷显微结构与性能的影响

陈茜琳^1,2, 鄢文^1,2, 王晓³, 李亚伟^1,2

1.武汉科技大学,省部共建耐火材料与冶金国家重点实验室,武汉 430081;
2.武汉科技大学,钢铁工业耐火材料新技术教育部国际合作联合实验室,武汉 430081;
3.青海大学化工学院,西宁 810016

收稿日期:2023-12-15 修订日期:2024-02-04 出版日期:2024-07-15 发布日期:2024-07-24
通信作者: 鄢文,博士,教授。E-mail:yanwen@wust.edu.cn
作者简介:陈茜琳(1998—),女,博士研究生。主要从事制备轻量化镁质耐火材料的研究。E-mail:1435294394@qq.com
基金资助:
国家自然科学基金(U21A2058)

Effect of Raw Material Composition on Microstructures and Properties of Microporous Periclase-Composite Spinel (Mg(Fe, Al)₂O₄) Ceramics

CHEN Qianlin^1,2, YAN Wen^1,2, WANG Xiao³, LI Yawei^1,2

1. The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, China;
2. International Joint Laboratory on New Technologies of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, China;
3. School of Chemical Engineering, Qinghai University, Xining 810016, China

Received:2023-12-15 Revised:2024-02-04 Online:2024-07-15 Published:2024-07-24

摘要/Abstract

摘要： 利用原位分解合成法,以轻烧MgO、Fe₂O₃和Al(OH)₃为原料,成功制备了多微孔方镁石-镁铁铝复合尖晶石陶瓷,并研究原料组成对其显微结构与性能的影响。研究结果表明:当理论镁铁铝复合尖晶石含量为0%(质量分数,下同)时,试样中颈部连接形成较少,耐压强度较低;当理论镁铁铝复合尖晶石含量为4%~16%时,试样中生成的液相量增多,物质运输速率加大,形成的颈部连接较多,耐压强度较高;当理论镁铁铝复合尖晶石含量为24%时,试样中镁铁铝复合尖晶石生成带来的体积膨胀增多,增大颗粒间距,颈部连接的形成减少,试样的耐压强度减小。同时,当理论镁铁铝复合尖晶石含量为12%~16%时,多微孔方镁石-镁铁铝复合尖晶石陶瓷具有较高的显气孔率(22.3%~24.6%)、较低的体积密度(2.75~2.80 g/cm³)和较高的耐压强度(100.6~123.1 MPa)。

关键词: 多微孔陶瓷, 方镁石-镁铁铝复合尖晶石, 原料组成, 原位分解合成法, 显微结构, 耐压强度

Abstract: In the work, microporous periclase-composite spinel (Mg(Fe, Al)₂O₄) ceramics was successfully prepared using calcined MgO, Fe₂O₃ and Al(OH)₃ as raw materials by in-situ decomposition synthesis. Meanwhile, the effects of raw material on its microstructures and properties were studied. The results show that when the periclase-composite spinel (Mg(Fe, Al)₂O₄) content is 0% (mass fraction, the same below), less neck connection form in the sample as well as the compressive strength is low. When the theoretical periclase-composite spinel (Mg(Fe, Al)₂O₄) content is 4%~16%, the content of the liquid increases and the mass transport accelerates. Then, lots of neck connections form and the compressive strength is high. When the theoretical periclase-composite spinel (Mg(Fe, Al)₂O₄) content is 24%, the expansion amounts caused by the formation of composite spinel increase so the inter-particle pore size increases and the neck connections decrease. Therefore, the compressive strength of the sample decreases. When the theoretical periclase-composite spinel (Mg(Fe, Al)₂O₄) content is 12%~16%, microporous periclase-composite spinel (Mg(Fe, Al)₂O₄) ceramics has excellent comprehensive properties, the apparent porosity of 22.3%~24.6%, the bulk density of 2.75~2.80 g/cm³, the compressive strength of 100.6~123.1 MPa.

Key words: microporous ceramics, periclase-composite spinel (Mg(Fe, Al)₂O₄), raw material composition, in-situ decomposition synthesis method, microstructure, compressive strength

中图分类号:

TQ175

陈茜琳, 鄢文, 王晓, 李亚伟. 原料组成对多微孔方镁石-镁铁铝复合尖晶石陶瓷显微结构与性能的影响[J]. 硅酸盐通报, 2024, 43(7): 2672-2679.

CHEN Qianlin, YAN Wen, WANG Xiao, LI Yawei. Effect of Raw Material Composition on Microstructures and Properties of Microporous Periclase-Composite Spinel (Mg(Fe, Al)₂O₄) Ceramics[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2024, 43(7): 2672-2679.

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原料组成对多微孔方镁石-镁铁铝复合尖晶石陶瓷显微结构与性能的影响

Effect of Raw Material Composition on Microstructures and Properties of Microporous Periclase-Composite Spinel (Mg(Fe, Al)₂O₄) Ceramics

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原料组成对多微孔方镁石-镁铁铝复合尖晶石陶瓷显微结构与性能的影响

Effect of Raw Material Composition on Microstructures and Properties of Microporous Periclase-Composite Spinel (Mg(Fe, Al)2O4) Ceramics

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Effect of Raw Material Composition on Microstructures and Properties of Microporous Periclase-Composite Spinel (Mg(Fe, Al)₂O₄) Ceramics