Effect of BaO on Thermo-Physical Properties of Lithium Zinc Silicate Glass-Ceramics

Abstract:

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Lithium zinc silicate (LZS) glasses containing Li2O–ZnO–SiO2–Na2O–B2O3–BaO–P2O5 with different BaO/(BaO+ZnO) ratios were prepared by conventional melt and quench technique and subsequently converted into glass-ceramics. The effect of BaO/(BaO+ZnO) ratio on various thermo-physical properties was investigated by changing the ratio from 0 to 0.226. The crystalline phases were characterized by X-ray diffraction technique on the composite glass-ceramics, including Li3Zn0.5SiO4, Li2OZnSiO4 and cristobalite phase. The thermal expansion coefficient (TEC) in the temperature range 70–400 oC increased from 107 × 10-7 to 141 ×10-7 / oC. The increase in expansion coefficient was associated with the formation of different phases which in turn influenced the rigidity/bonding in the glass-ceramics. The microstructure was analyzed by scanning electron microscopy (SEM), and the grain size became bigger after the addition of BaO.

Info:

Periodical:

Advanced Materials Research (Volumes 299-300)

Edited by:

Jianzhong Wang and Jingang Qi

Pages:

503-507

DOI:

10.4028/www.scientific.net/AMR.299-300.503

Citation:

B. Zhai et al., "Effect of BaO on Thermo-Physical Properties of Lithium Zinc Silicate Glass-Ceramics", Advanced Materials Research, Vols. 299-300, pp. 503-507, 2011

Online since:

July 2011

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$35.00

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