Preparation of Low Expansion Borosilicate Glass Based on Regeneration of Waste Liquid Crystal Glass and Its Physicochemical Properties

Abstract

Abstract: Based on the high-value recycling of waste liquid crystal glass, low expansion borosilicate glass was prepared with waste liquid crystal glass as main raw material, and quartz sand, boric acid and soda ash as the auxiliary materials. By buoyancy method, indentation method, quartz expansion method and weight test method, the influences of waste liquid crystal glass content and auxiliary raw materials (Na₂O and B₂O₃) on the physicochemical properties of glass were explored. The results show that with the increase of waste liquid crystal glass content, glass density, linear thermal expansion coefficient and acid-resistant mass loss increase, while Vickers hardness and alkali-resistant mass loss decrease. With the increase of Na₂O content in auxiliary raw materials, the glass density, linear thermal expansion coefficient, acid-resistant mass loss and alkali-resistant mass loss increase, while Vickers hardness decreases. With the increase of B₂O₃ content in auxiliary raw materials, the glass density and Vickers hardness decrease, and linear thermal expansion coefficient and acid- and alkali-resistance mass loss increase. When the mass fraction of Na₂O and B₂O₃ in waste liquid crystal glass and auxiliary raw materials are 60.00%, 1.00% and 14.72%, respectively, the Vickers hardness of glass is the highest, and density and linear thermal expansion coefficient of glass are the lowest, which are 7.143 0 GPa, 2.309 7 g·cm^-3 and 3.531 7×10^-6℃^-1, respectively. When the mass fraction of waste liquid crystal glass and Na₂O and B₂O₃ in auxiliary raw materials are 60.00%, 3.00%, 9.72%, the mass loss of acid resistance is the smallest, which is 0.614 0 mg·cm^-2. When the mass fraction of waste liquid crystal glass and Na₂O and B₂O₃ in auxiliary rawmaterials are and 70.00%, 2.00%, 11.67%, the mass loss of alkali resistance is the smallest, which is 1.214 0 mg·cm^-2。

Key words: waste liquid crystal glass, low expansion borosilicate glass, density, Vickers hardness, linear thermal expansion coefficient, acid and alkali resistance

CLC Number:

TQ171.1

TIAN Yingliang, YUAN Zhichun, ZHAO Zhiyong, MU Guanghan, HE Feng. Preparation of Low Expansion Borosilicate Glass Based on Regeneration of Waste Liquid Crystal Glass and Its Physicochemical Properties[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2024, 43(1): 354-362.

References

[1] SHE L L, GUO Y W, RUAN J L, et al. Study on the critical control of foam insulation materials produced by waste TFT-LCD glass[J]. Applied Mechanics and Materials, 2014, 668/669: 74-78.
[2] 张磊. TFT-LCD基板玻璃配方及工艺性能研究[D]. 北京: 北京工业大学, 2011.
ZHANG L. Study on formula and technological properties of TFT-LCD substrate glass[D]. Beijing: Beijing University of Technology, 2011 (in Chinese).
[3] WANG H Y. A study of the engineering properties of waste LCD glass applied to controlled low strength materials concrete[J]. Construction and Building Materials, 2009, 23(6): 2127-2131.
[4] LEE C T. Production of alumino-borosilicate foamed glass body from waste LCD glass[J]. Journal of Industrial and Engineering Chemistry, 2013, 19(6): 1916-1925.
[5] LIN K L. The effect of heating temperature of thin film transistor-liquid crystal display (TFT-LCD) optical waste glass as a partial substitute partial for clay in eco-brick[J]. Journal of Cleaner Production, 2007, 15(18): 1755-1759.
[6] 高淑雅, 郭晓琛, 郭宏伟, 等. 一种利用废液晶显示器玻璃生产瓷砖的方法: CN101717239A[P]. 2010-06-02.
GAO S Y, GUO X C, GUO H W, et al. A method of using waste liquid crystal display glass to produce ceramic tile: CN101717239A[P]. 2010-06-02 (in Chinese).
[7] 国家质量监督检验检疫总局, 中国国家标准化管理委员会. 玻璃密度测定浮力法: GB/T 5432—2008[S]. 北京: 中国标准出版社, 2009.
State Administration of Quality Supervision, Inspection and Quarantine, Standardization Administration of China. Buoyancy method for glass density determination: GB/T 5432—2008[S]. Beijing: Standards Press of China, 2009 (in Chinese).
[8] 国家市场监督管理总局, 国家标准化管理委员会. 超薄玻璃硬度和断裂韧性试验方法小负荷维氏硬度压痕法: GB/T 37900—2019[S]. 北京: 中国标准出版社, 2019.
State Administration for Market Regulation, Standardization Administration. Test methods for hardness and fracture toughness of ultra-thin glass Small load Vickers hardness indentation method: GB/T 37900—2019[S]. Beijing: Standards Press of China, 2019 (in Chinese).
[9] 国家技术监督局. 玻璃平均线热膨胀系数的测定: GB/T 16920—1997[S]. 北京: 中国标准出版社, 1998.
State Bureau of Technical Supervision. Measurement of average linear thermal expansion coefficient of glass: GB/T 16920-1997[S]. Beijing: Standards Press of China, 1998 (in Chinese).
[10] 国家市场监督管理总局, 国家标准化管理委员会. 玻璃耐沸腾盐酸侵蚀性的重量试验方法和分级: GB/T 15728—2021[S]. 北京: 中国标准出版社, 2021.
State Administration for Market Regulation, Standardization Administration. Weight test method and classification of glass resistance to boiling hydrochloric acid attack: GB/T 15728—2021[S]. Beijing: Standards Press of China, 2021 (in Chinese).
[11] 国家市场监督管理总局, 国家标准化管理委员会. 玻璃耐沸腾混合碱水溶液侵蚀性试验方法和分级: GB/T 6580—2021[S]. 北京: 中国标准出版社, 2021.
State Administration for Market Regulation, Standardization Administration. Test method and classification of corrosion resistance of glass to boiling mixed alkaline water solution: GB/T 6580—2021[S]. Beijing: Standards Press of China, 2021 (in Chinese).
[12] 田英良, 孙诗兵. 新编玻璃工艺学[M]. 北京: 中国轻工业出版社, 2009.
TIAN Y L, SUN S B. Technology of newly woven glass[M]. Beijing: China Light Industry Press, 2009 (in Chinese).
[13] 赵彦钊, 殷海荣. 玻璃工艺学[M]. 北京: 化学工业出版社, 2006.
ZHAO Y Z, YIN H R. Technology of glass[M]. Beijing: Chemical Industry Press, 2006 (in Chinese).
[14] 张盼, 张芩宇, 姜宏, 等. B₂O₃对低膨胀硼硅酸盐玻璃结构及性能影响的研究[J]. 硅酸盐通报, 2021, 40(5): 1685-1691+1697.
ZHANG P, ZHANG Q Y, JIANG H, et al. Effect of B₂O₃ on structure and properties of low expansion borosilicate glass[J]. Bulletin of the Chinese Ceramic Society, 2021, 40(5): 1685-1691+1697 (in Chinese).
[15] 赵聪聪. Al₂O₃、B₂O₃和SiO₂对电子基板玻璃理化性能影响及机理研究[D]. 西安: 陕西科技大学, 2020.
ZHAO C C. Effects of Al₂O₃, B₂O₃ and SiO₂ on the physical and chemical properties of electronic substrate glass and their mechanisms[D].Xi’an: Shaanxi University of Science & Technology, 2020 (in Chinese).
[16] 张彬, 王静, 汤何锐, 等. 碱土金属氧化物对无碱硼铝硅酸盐玻璃性能的影响[J]. 材料科学与工程学报, 2018, 36(5): 824-828.
ZHANG B, WANG J, TANG H R, et al. Effect of alkaline earth metal oxide on physicochemical properties of alkali-free boron aluminum silicate glasses[J]. Journal of Materials Science and Engineering, 2018, 36(5): 824-828 (in Chinese).
[17] 陈祖熊. MgO-ZnO-Al₂O₃-ZrO₂-SiO₂玻璃碱侵蚀过程的X射线能谱和扫描电镜研究[J]. 硅酸盐学报, 1987, 15(6): 515-521.
CHEN Z X. An EDAX and SEM study on alkali corrosion behaviour of MgO-ZnO-Al₂O₃-ZrO₂-SiO₂ glass[J]. Journal of the Chinese Ceramic Society, 1987, 15(6): 515-521 (in Chinese).