不同添加剂对烧结莫来石液相和微观结构的改变

IF 1.8 4区材料科学 Q2 MATERIALS SCIENCE, CERAMICS

International Journal of Applied Ceramic Technology Pub Date : 2024-07-19 DOI:10.1111/ijac.14860

Yaxuan Wang, Junzhan Zhang, Jianying Gao, Zhaopeng Yang

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引用次数: 0

摘要

在陶瓷领域，莫来石因其热膨胀率低、热导率高、化学稳定性和抗蠕变性强而备受关注。本研究以煤系高岭土为原料，以钾长石和五氧化二磷为添加剂，研究了烧结莫来石的矿物相、液相和微观结构演变。使用 FactSage 8.1 计算了 K2O 和 P2O5 对莫来石中液相含量和粘度的影响。结果表明，K2O 的引入能有效抑制嵴钙钛矿的形成。添加 K2O 和 P2O5 提高了煅烧过程中形成的液相的含量。引入 K2O 和 P2O5 后，莫来石形成了针状和柱状结构，平均长度分别为 9.76 微米和 7.97 微米。此外，引入 K2O 和 P2O5 还显著改善了莫来石的物理性质。

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Modification of liquid phase and microstructure of sintered mullite by different additives

In the field of ceramics, mullite has drawn plenty of attention due to its low thermal expansion and thermal conductivity as well as its high chemical stability and creep resistance. This work reported the mineral phase, liquid phase, and microstructure evolution of the sintered mullite, using coal‐series kaolin as the raw material and potash feldspar as well as phosphorus pentoxide as additives. The effects of K2O and P2O5 on the content and viscosity of the liquid phase in mullite were calculated using FactSage 8.1. The results showed that the introduction of K2O could inhibit the formation of cristobalite effectively. Adding K2O and P2O5 improved the content of the liquid phase formed during the calcination process. After introducing K2O and P2O5, mullite developed acicular and columnar structures, with average lengths of 9.76 and 7.97 µm, respectively. Furthermore, introducing K2O and P2O5 improved the physical properties of mullite significantly.

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来源期刊

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;