[KSCI] Korea Science Citation Index Service

http://dx.doi.org/10.4191/kcers.2013.50.6.396

Fabrication of Large-Size Alumina by Pressure-Vacuum Hybrid Slip Casting

Cho, Kyeong-Sik (School of Advanced Materials and System Engineering, Kumoh National Institute of Technology)
Lee, Seung Yeul (Dicera Co. Ltd.)

Publication Information

Journal of the Korean Ceramic Society / v.50, no.6, 2013 , pp. 396-401 More about this Journal

Abstract

The size of various alumina ceramics used in the semiconductor and display industries must be increased to increase the size of wafers and panels. In this research, large alumina ceramics were fabricated by pressure-vacuum hybrid slip casting (PVHSC) employing a commercial powder, followed by sintering in a furnace. In the framework of the PVHSC method, the consolidation occurs not only by compression of the slip in the casting room but also by suction of the dispersion medium from the casting room. When sintered at $1650^{\circ}C$ for 4 h, the fabricated large-size alumina ( $1,550{\times}300{\times}30mm^3$ ) exhibited a dense microstructure corresponding to more than 99.2% of the theoretical density and a high purity of 99.79%. The flexural and compressive strengths of the alumina plate were greater than 340 MPa and 2,600 MPa, respectively.

Keywords

Alumina; Slip casting; Microstructure; Strength;

Citations & Related Records

Times Cited By KSCI : 3 (Citation Analysis)

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