Paper Title:
Effect of Si3N4-Y2O3 Compound Additive on Crystallization and Sintering of Fused Quartz Ceramic Materials
  Abstract

Fused quartz granules (d50=19 μm) were used as raw material, and Si3N4-Y2O3 (1:1, in mass) was used as additive with dosages of 1%, 2% and 3% (in mass). Fused quartz ceramic materials were fabricated in reduction atmosphere at 1300 °C, 1350 °C and 1400 °C for 1 h. The effect of Si3N4-Y2O3 on crystallization and sintering of the fused quartz ceramic materials were researched by measurements of apparent porosity, bending strength and thermal expansion rate (RT~1200 °C), and by the analyses of XRD and SEM. The results showed that the samples sintered at each temperature with 3% Si3N4-Y2O3 had the lowest apparent porosity, the highest bending strength and more compact microstructure. This indicated that 3% Si3N4-Y2O3 was conducive to sintering of fused quartz ceramic materials. The results of XRD and thermal expansion rate showed that addition of 3% Si3N4-Y2O3 compound had obvious effect on inhibiting crystallization of the samples sintered at various temperatures. It can be deduced that the Si3N4-Y2O3 compound plays the best role in inhibiting crystallization and facilitating sintering of fused quartz ceramic materials.

  Info
Periodical
Advanced Materials Research (Volumes 335-336)
Chapter
Chapter 4: Ceramic
Edited by
Yun-Hae Kim, Prasad Yarlagadda, Xiaodong Zhang and Zhijiu Ai
Pages
713-716
DOI
10.4028/www.scientific.net/AMR.335-336.713
Citation
S. L. Liu, Z. F. Wang, J. L. Bu, S. B. Shen, L. X. Yu, "Effect of Si3N4-Y2O3 Compound Additive on Crystallization and Sintering of Fused Quartz Ceramic Materials", Advanced Materials Research, Vols. 335-336, pp. 713-716, 2011
Online since
September 2011
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Price
$32.00
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