碳热氮化合成27R-SiAlON的晶体结构

IF 1.5 4区材料科学 Q3 MATERIALS SCIENCE, CERAMICS

Transactions of the Indian Ceramic Society Pub Date : 2021-01-02 DOI:10.1080/0371750X.2020.1852972

Mita Biswas, Aditi Sahoo, K. Muraleedharan, S. Bandyopadhyay

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引用次数: 2

摘要

摘要通过详细的X射线衍射和电子显微镜实验，对实验室合成的（碳热还原氮化）27R SiAlON的晶体和微观特征进行了研究。27R-SiAlON具有菱面体R3m结构，最好表示为Si1.1Al7.9O1.9N8.1。已经确定了组成相的晶格参数、离子位置、键长、角度以及晶粒尺寸和应变。六方晶系中的R3m相表现出巨大的各向异性，伪四方性比率为c/a√6～10。电子显微镜也提供了SiAlON的板状晶体由于其大的c轴而优先生长的证据。图形摘要

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Crystal Structure of 27R-SiAlON Synthesized Under Carbothermal Nitridation

ABSTRACT Laboratory synthesized (carbothermal-reduction-nitridation) 27R-SiAlON is studied in terms of crystallographic and microscopic features by detailed X-ray diffraction and electron microscopy experiments. 27R- SiAlON is analyzed to possess rhombohedral R3m structure and is best represented as Si1.1Al7.9O1.9N8.1. Lattice parameters, ion positions, bond lengths, angles as well as the crystallite size and strain have been determined for the constituent phase. The R3m phase in hexagonal setting exhibits enormous anisotropy with pseudo-tetragonality ratio c/a√6 ∼10. The electron microscopy too offers evidence of preferential growth of platelike crystals of SiAlON due to its large c-axis. GRAPHICAL ABSTRACT

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来源期刊

Transactions of the Indian Ceramic Society 工程技术-材料科学：硅酸盐

CiteScore

2.40

自引率

8.30%

发文量

审稿时长

2.3 months

期刊介绍： Transactions of the Indian Ceramic Society is a quarterly Journal devoted to current scientific research, technology and industry-related news on glass and ceramics. The Journal covers subjects such as the chemical, mechanical, optical, electronic and spectroscopic properties of glass and ceramics, and characterization of materials belonging to this family. The Editor invites original research papers, topical reviews, opinions and achievements, as well as industry profiles for publication. The contributions should be accompanied by abstracts, keywords and other details, as outlined in the Instructions for Authors section. News, views and other comments on activities of specific industries and organizations, and also analyses of industrial scenarios are also welcome.