Study on Sintering Properties and Crystallization of Fused Quartz Ceramic Materials Containing BN-B4C

Shu Bin Shen; Jing Long Bu; Li Xue Yu; Jun Xing Chen; Zhi Fa Wang

doi:10.4028/www.scientific.net/AMM.217-219.43

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 217-219Study on Sintering Properties and Crystallization...

Study on Sintering Properties and Crystallization of Fused Quartz Ceramic Materials Containing BN-B₄C

Abstract:

Different dosages of BN-B₄C compound additive have been introduced for preparing specimen with fused quartz granule (d₅₀=10μm). Fused quartz ceramic materials were fabricated in reduction atmosphere at various temperatures for 1h. The characterizations were carried out by thermal expansion ratio, apparent porosity, cold modulus of rupture (CMOR) and SEM as well as by X-ray diffraction (XRD). The effect of BN-B₄C on the sintering, crystallization and properties of fused quartz was investigated. The result reveals that with increase of the temperature, the apparent porosity and CMOR of specimens decrease. The specimen C sintered at 1300°C possessed a maximum CMOR (22.31 MPa). The specimen C sintered at 1350°C has more compact microstructure. The lowest thermal expansion ratio of the specimens sintered at various temperatures was obtained when the dosages of compound additive is 3%. With increasing BN-B₄C content, the role on inhibiting crystallization was improved. The specimens containing 3 wt% BN-B₄C had obvious effect on inhibiting crystallization of the specimens sintered at various temperatures.

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Periodical:

Applied Mechanics and Materials (Volumes 217-219)

Pages:

43-46

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.217-219.43

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Online since:

November 2012

Authors:

Shu Bin Shen, Jing Long Bu, Li Xue Yu, Jun Xing Chen, Zhi Fa Wang

Keywords:

BN-B₄C, Fused Quartz, SEM, Thermal Expansion, X-Ray Diffraction (XRD)

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