Investigation of BaSO₄-KPO₃-Na₂B₄O₇ Low-Melting Glass System as a Basis for Synthesis of a Glass-Solder Material

Abstract:

The possibility of using the compositions of BaSO₄-KPO₃-Na₂B₄O₇ system as a glass-solder (frit) material was shown. A glass formation region has been established in BaSO₄-KPO₃-Na₂B₄O₇ system which is located in the borate-phosphate part of the concentration triangle and occupies ~41% of the triangle area. The concentration dependences of linear thermal expansion coefficient (TCLE), the softening temperature and the glass transition temperature was determined and discussed. It is established that the glass formation region, the concentration dependences of TCLE and technological temperatures values are significantly closer to those for CaSO₄-KPO₃-Na₂B₄O₇ system than for MgSO₄-KPO₃-Na₂B₄O₇ system. That may point out at the similar effect barium sulphate and calcium sulphate doping in the sulphate-phosphate-borate systems.

• Periodical: Key Engineering Materials (Volume 887)
• Pages: 60-64
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.887.60
• Online since: May 2021
• Authors: Alexey V. Stolbovsky*, Vita Vyatchina
• Keywords: Glass Formation Region, Glass Transition Temperature, Glass-Solder Material, Linear Coefficient of Thermal Expansion, Low Melting Glass, Softening Temperature

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