LU Qiang 1, ZHAO Furong 2, LIU Shujiang 2, YIN Zhigang 3, ZHANG Jun 4, SU Yucai 4, YI Kangfeng 4
(1. Shandong Rongnai Material Design Co., Ltd., Taian 271699, Shandong, China; 2. School of Materials Science and Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, Shandong, China; 3. Lithium Resources and Lithium Materials Key Laboratory of Sichuan Province, Tianqi Lithium Corporation, Chengdu 610000, Sichuan, China; 4. Shandong Pharmaceutical Glass Co., Ltd., Zibo 256100, Shandong, China)
Abstract: In this work, the effect of size of quartz on the melting and fining behaviors of borosilicate glasses was studied. In particular, solid-state reaction, polymorph transformation, dissolution behavior of quartz particles during the melting process, were explored, along with the final fining effect. It is demonstrated that the size of the quartz has a significant impact on melting behaviors of the samples, which in turn influenced the fining effect of the resulting glasses. In details, for the mixture with smaller quartz particles, formation of low-viscosity glass liquid and solid-phase reaction easily took place, due to its higher specific surface area. Furthermore, the dissolution rate of quartz particles is also faster, as compared with that with large size of quartz particles. In the meantime, more gas is captured by the glass-forming liquid to form bubbles, which promoted the fining of the glass melts.
Key words: borosilicate glass; quartz; grain size; melting; fining