Study on mullitization of sillimanite group minerals and its effect on properties of the Al2O3-SiC-C gunning material

IF 1.8 4区 材料科学 Q2 MATERIALS SCIENCE, CERAMICS International Journal of Applied Ceramic Technology Pub Date : 2024-07-15 DOI:10.1111/ijac.14863
Maoqi Ju, Dongsheng Gao, Peiyuan Cong, Xiaocun Zhang, Wei Cai
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Abstract

This study aimed to compare and summarize the mullitization mechanism of the sillimanite group minerals and investigated its effect on the mechanical properties of Al2O3-SiC-C gunning materials. By comparing the phase composition and microstructure of kyanite, andalusite, and sillimanite at different temperatures, the mullitization mechanism of sillimanite group minerals was clarified. Furthermore, the Al2O3-SiC-C gunning materials with sillimanite group minerals addition were prepared by bauxite and fused brown corundum as aggregates, fused white corundum (≤0.045 mm), SiC (≤0.075 mm), α-Al2O3 (≤10 µm), pitch sphere, SiO2 micropowder (≤2 µm) as a matrix, and silica sol as a binder. Then, the effect of the addition of sillimanite group minerals on the mechanical properties of Al2O3-SiC-C gunning materials was characterized. The results indicate that kyanite requires the lowest temperature for mullitization compared to andalusite and sillimanite. The mullitization process involves the migration of Al3+ and Si4+, resulting in a decrease in the lattice constant of sillimanite group minerals followed by the production of mullite and SiO2. Incorporating sillimanite group minerals into Al2O3-SiC-C gunning materials effectively controls their linear change rate after firing while enhancing their mechanical properties. Notably, the addition of kyanite yields superior performance in Al2O3-SiC-C gunning materials.

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矽线石类矿物的莫来石化及其对 Al2O3-SiC-C 枪炮材料性能影响的研究
本研究旨在比较和总结矽线石类矿物的莫来石化机制,并研究其对 Al2O3-SiC-C 枪弹材料力学性能的影响。通过比较不同温度下钾长石、安达卢石和矽线石的相组成和显微结构,阐明了矽线石族矿物的莫来石化机制。此外,还以铝矾土和熔融棕刚玉为骨料,熔融白刚玉(≤0.045 毫米)、SiC(≤0.075 毫米)、α-Al2O3(≤10 微米)、沥青球、SiO2 微粉(≤2 微米)为基体,硅溶胶为粘结剂,制备了添加了矽线石族矿物的 Al2O3-SiC-C 喷枪材料。然后,表征了添加矽线石族矿物对 Al2O3-SiC-C 喷枪材料力学性能的影响。结果表明,与安达鲁石和矽线石相比,钾长石所需的莫来石化温度最低。莫来石化过程涉及 Al3+ 和 Si4+ 的迁移,导致矽线石类矿物的晶格常数降低,随后产生莫来石和二氧化硅。在 Al2O3-SiC-C 浇注材料中加入矽线石类矿物可有效控制其烧成后的线性变化率,同时提高其机械性能。值得注意的是,在 Al2O3-SiC-C 浇注材料中加入钾长石可获得更优越的性能。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
International Journal of Applied Ceramic Technology
International Journal of Applied Ceramic Technology 工程技术-材料科学:硅酸盐
CiteScore
3.90
自引率
9.50%
发文量
280
审稿时长
4.5 months
期刊介绍: The International Journal of Applied Ceramic Technology publishes cutting edge applied research and development work focused on commercialization of engineered ceramics, products and processes. The publication also explores the barriers to commercialization, design and testing, environmental health issues, international standardization activities, databases, and cost models. Designed to get high quality information to end-users quickly, the peer process is led by an editorial board of experts from industry, government, and universities. Each issue focuses on a high-interest, high-impact topic plus includes a range of papers detailing applications of ceramics. Papers on all aspects of applied ceramics are welcome including those in the following areas: Nanotechnology applications; Ceramic Armor; Ceramic and Technology for Energy Applications (e.g., Fuel Cells, Batteries, Solar, Thermoelectric, and HT Superconductors); Ceramic Matrix Composites; Functional Materials; Thermal and Environmental Barrier Coatings; Bioceramic Applications; Green Manufacturing; Ceramic Processing; Glass Technology; Fiber optics; Ceramics in Environmental Applications; Ceramics in Electronic, Photonic and Magnetic Applications;
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