用 Fe2O3 作为供氧体提高发泡陶瓷的发泡性能

IF 4.3 3区 材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY
Xiangming Li , Zijian Su , Xianwen Li , Junlong Zhang , Qinghong Meng , Wanjun Yu , Zuju Ma , Junting Liu
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引用次数: 0

摘要

为降低制备发泡陶瓷(FCs)的成本,提出了一种在材料体系中添加 Fe2O3 的解决方案。随着不含 Fe2O3 的材料体系中 Si3N4 的增加,熔融陶瓷基质在高温下的气体生成量会略有增加,从而使 FC 的发泡量略有增加。添加 Fe2O3 增加了熔融陶瓷基体在高温下的供氧能力,从而加速了 Si3N4 的氧化,进而增加了 FC 的发泡体积。5 wt% Fe2O3 和 2 wt% Si3N4 材料体系在 1160-1180 ℃下烧结的 FC 具有令人满意的综合性能,总孔隙率/闭孔率分别为 (73.6-79.5)%/(71.4-75.7)% ,抗压强度为 10.2-15.4 MPa。在材料体系中加入 Fe2O3 可以减少制备 FCs 时 Si3N4 的用量,从而降低 FCs 的制备成本。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Improving the foaming performance of foamed ceramics using Fe2O3 as an oxygen donor

Improving the foaming performance of foamed ceramics using Fe2O3 as an oxygen donor
A solution is proposed to reduce the cost of preparing foamed ceramics (FCs) by adding Fe2O3 to the material system. As the Si3N4 in the Fe2O3–free material system increases, the molten ceramic matrix allows a slight increase in gas generation at elevated temperatures, resulting in a slight increase in the foaming volume of FCs. The addition of Fe2O3 increases the oxygen supply capacity of the molten ceramic matrix at elevated temperatures, thereby accelerating the oxidation of Si3N4 and consequently increasing the foaming volume of the FCs. The FCs sintered from the 5 wt% Fe2O3 and 2 wt% Si3N4 material system at 1160–1180 °C have satisfactory overall performance with total/closed porosity of (73.6–79.5)%/(71.4–75.7)% and compressive strength of 10.2–15.4 MPa. The addition of Fe2O3 to the material system can reduce the dosage of Si3N4 for FCs preparation, thereby decreasing the cost of FCs preparation.
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来源期刊
Materials Chemistry and Physics
Materials Chemistry and Physics 工程技术-材料科学:综合
CiteScore
8.70
自引率
4.30%
发文量
1515
审稿时长
69 days
期刊介绍: Materials Chemistry and Physics is devoted to short communications, full-length research papers and feature articles on interrelationships among structure, properties, processing and performance of materials. The Editors welcome manuscripts on thin films, surface and interface science, materials degradation and reliability, metallurgy, semiconductors and optoelectronic materials, fine ceramics, magnetics, superconductors, specialty polymers, nano-materials and composite materials.
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