Effect of Yttrium Oxide on the Viscosity and Crystallization of Borosilicate Glass at High Temperature

Abstract:

Effect of Y₂O₃ on the viscosity and Crystallization of of borosilicate glass at high temperature was investigated at high temperature. Melt viscosity as a function of temperature was determined by using a rotating spindle viscometer. Liquidus temperature was determined by the Gradient Furnace Method. The results show that the viscosity decreased as a function of Y₂O₃ content. The activation energy of glass without Y₂O₃ is about 110.3 kJ·mol^-1 and the activation energy increases with the Y₂O₃ addition up to the 2 wt%. At 2 wt% Y₂O₃, the specimen shows the maximum activation energy value of 112.6 kJ·mol^-1. As Y₂O₃ content increase, the activation energy decreases. The fiber-forming temperature of glass without Y₂O₃ is about 1342 oC and the fiber-forming temperature increases with the Y₂O₃ addition up to the 2 wt%. At 2 wt% Y₂O₃, the sample shows the maximum activation energy value of 1370 °C. When Y₂O₃ content increase, the fiber-forming temperature decreases. The liquidus temperature of glass decreases from 1313 °C to 1023 °C when Y₂O₃ content increases from 0 wt% to 6 wt%. The difference between the fiber-forming and the liquidus temperatures of glass increases from 30 oC to 336 °C when Y₂O₃ content increases from 0 wt% to 6 wt%.

• Periodical: Advanced Materials Research (Volumes 750-752)
• Pages: 974-977
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.750-752.974
• Online since: August 2013
• Authors: Zhong Qing Tian, Yu Kai Zhu, Wei Jiu Huang
• Keywords: Crystallization, Fiber-Forming Temperature, Viscosity, Yttrium Oxide

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