Thin Film Transistor-Liquid Crystal Display Cullet: A Raw Material for Production of Commercial Soda Lime Silicate Glasses

• Published in: Journal of cleaner production Vol. 79; pp. 276 - 282
• Main Authors: Kim, Kidong, Kim, Kicheol, Hwang, Jonghee
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier Ltd 15.09.2014; Elsevier
• Subjects: Animal, plant and microbial ecology; Applied ecology; Applied sciences; Biological and medical sciences; Conservation, protection and management of environment and wildlife; Environment and sustainable development; Exact sciences and technology; Fundamental and applied biological sciences. Psychology; LCD cullet; Pollution; Raw materials; Recycling; Soda lime silicate glasses; Wastes; WEEE; Soda lime silicate glasses; Raw materials; Recycling; LCD cullet; WEEE; E-waste; Pollution prevention; Glass; Silicates; Liquid crystals; Sustainable development; Thin film; Environmental protection
• ISSN: 0959-6526; 1879-1786
• DOI: 10.1016/j.jclepro.2014.05.036

Alkali free alumino-borosilicate display glasses that serve as the window in a TFT-LCD (hereafter LCD) device not only have few impurities but also high homogeneity to guarantee the quality of the display. These characteristics of LCD glasses enable the possibility of recycling LCD glass cullet as a raw material for commercial soda lime silicate glasses from the perspectives of the raw material costs and the energy saving. In the present work, several batches containing LCD cullet for two commercial model glasses were prepared and melted in the laboratory. According to several properties of the melts and the glasses, there was no serious change in the properties with up to 9 wt% replacement of the flint glass and 11 wt% replacement of the low iron flat glass by the LCD cullet. Currently, LCD cullet is being used successfully in a number of industrial plants for the production of flint glass in Korea. Two-thirds of flint bottle glasses contain B2O3 component derived from LCD cullet. •Application of LCD cullet as raw material of commercial glasses was examined.•Crystalline raw materials such as feldspar were replaced by LCD cullet.•Overall melt properties showed no serious change.•Water resistance and spectral transmission of glass were rather improved.•LCD cullet is being used in a number of flint bottle glass plants in Korea.