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Open Access Homogeneous Sol-coating on Sintering Properties of Fused Silica Powder

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Abstract:

A silica sol was firstly prepared via the hydrolysis of TEOS, and then the surface of fused silica particles was coated by a homogeneous sol layer. The coated particles were obtained after washing, drying and calcination treatment. The fused silica ceramic was prepared with the original and coated particles at different sintering temperatures. The sintering properties of the original and coated particles were investigated. The effect of sol-coating on the crystallization behavior and bending strength of the ceramic sintered samples was also analyzed. The results show that the property of the fused silica particles coated with homogeneous sol layer is superior to that of original particles. Compared to the sintered sample using original particles as a raw material, the sample with coated particles sintered shows a higher volume density, a greater bending strength and a lower apparent porosity rate. The crystallization behavior of the fused silica ceramic is not affected by the sol layer. The optimum performance of sample with the coated particles sintered (the volume density of 1.89 g/cm3, the bending strength of 30.2 MPa, and no crystallization phenomenon) can be achieved at a sintering temperature of 1 200 .

Keywords: bending strength; fused silica ceramics; homogeneous sol-coating; silica sol; sintering property

Document Type: Research Article

DOI: https://doi.org/10.7521/j.issn.0454-5648.2013.12.07

Affiliations: 1: Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing 100083, China 2: Material Engineering Department, Hebei College of Industry and Technology, Shijiazhuang 050000, China

Publication date: 2013-12-01

More about this publication?
  • Journal of the Chinese Ceramic Society (JCCS), published in Chinese and in English, is a comprehensive monthly periodical focused on the fields of inorganic and non-metallic materials. The main purpose of the JCCS is to report the latest creative achievements in research, production and design for ceramics, glass, cementing materials, refractory, artificial crystals and other non-metallic materials. JCCS is regarded as an important journal in inorganic and non-metallic materials sciences in China and has been awarded by China Association for Science and Technology. The full-text of papers in JCCS is also published by CNKI (China National Knowledge Infrastructure). JCCS is indexed in EI Compendex, CA( Chemical Abstracts) ,SA and Ж and more than 20 databases.
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