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Open Access Preparation of Translucent Al2O3 Hollow Spheres in Millimeter-scale via a Template Method

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Abstract:

The translucent Al2O3 hollow spherical ceramics were prepared with the polystyrene sphere (PS) template via mechanical coating and sintering in vacuum. In the mechanical coating process, the PS–Al2O3 core–shell structures were obtained by means of centrifugal force. The translucent Al2O3 hollow spheres in millimeter-scale were prepared as following stages: 1) removal of the template to obtain alumina hollow sphere by calcination at 320 for 2 h and 900 for 2 h with a heating rate of 1 /min; 2) sintering of alumina hollow spheres to remove the template completely and most of the pores by calcination at 1 300 for 2 h; and 3) sintering of alumina hollow spheres at 1 800 in vacuum. The hollow spherical ceramics calcined show better morphology and mechanical property. The thickness of alumina shell is 150 μm, which is appropriate for the promising application of inertial confined fusion.

Keywords: alumina; hollow spheres; millimeter-scale; polystyrene sphere; translucent

Document Type: Research Article

DOI: https://doi.org/10.7521/j.issn.0454-5648.2013.12.08

Affiliations: 1: State Key Laboratory Cultivation Base for Nonmetal Composite and Functional Materials, Southwest University of Science and Technology, Mianyang 621010, Sichuan, China 2: State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China

Publication date: 2013-12-01

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  • 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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