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Effect of SnO addition on structure and properties of P2O5-SnF2-WO3-B2O3 glasses for low temperature sealing

JINLONG DIAO1,2, XIN XU3, DONGWEI ZHANG1,2, TAO ZHENG1,2,* , ZHENGYU LI1, JINGWEN LV1

Affiliation

  1. School of Materials and Science Engineering, Changchun Unive rsity of Science and Technology, Changchun, China
  2. Jilin Provincial Science and Technology Innovation Center of Optical Materials and Che mistry, Changchun University of Science and Technology, Changchun, China
  3. Basic Department, Aviation University of Air Force, Changchun, China

Abstract

Phosphate-tinfluoride-tungsten-boron oxide (P2O5-SnF2-WO3-B2O3, PSWB) glasses were prepared for low temperature sealant materials using the conventional melt quenching technology. In these glasses SnF2 was partially replaced with SnO. The effect of SnO concentration on glass structure and properties were investigated. Full characterizations have been carried out by XRD, TEC, SEM, DSC, as well as FTIR. As revealed from glass density and electrical resistance, the parameters incr ease almost linearly with the addition of SnO. The infrared spectra reflect that there is an increasing number of Sn OP and P-O-P, as the SnO concentration rises from 0 to 25 wt %. Besides, changes in curves of thermal expansion indicate that the increasing SnO content diminishes the coefficient of thermal expansion and promote the improvement of the glass transition and softening temperature. For the immersing measurements, the SEM analysis implies that the glass water durability has been improved as the SnO concentration increases. Revealed from the DSC results, the molten temperature of the glass is near 300 oC, and glass pow d er in the remelt test exhibits sufficient flowability, which provides new ideas for the development of low temperature and environ mentally friendly sealant materials..

Keywords

Low temperature sealing, Phosphate glass, Network structure, Water durability.

Citation

JINLONG DIAO, XIN XU, DONGWEI ZHANG, TAO ZHENG, ZHENGYU LI, JINGWEN LV, Effect of SnO addition on structure and properties of P2O5-SnF2-WO3-B2O3 glasses for low temperature sealing, Optoelectronics and Advanced Materials - Rapid Communications, 13, 11-12, November-December 2019, pp.613-619 (2019).

Submitted at: May 20, 2019

Accepted at: Dec. 10, 2019