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

Bin Zhai; Xiao Li Zhou; Shang Ru Zhai; Zhi Qiang Wang

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

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 299-300Effect of BaO on Thermo-Physical Properties of...

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

Abstract:

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 Li₃Zn_0.5SiO₄, 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.

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Advanced Materials Research (Volumes 299-300)

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503-507

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https://doi.org/10.4028/www.scientific.net/AMR.299-300.503

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July 2011

Authors:

Bin Zhai, Xiao Li Zhou, Shang Ru Zhai, Zhi Qiang Wang

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Glas Ceramics, Lithium-Zinc-Silicate Glass, Thermal Expansion Coefficient

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