Recycling thin film transistor liquid crystal display (TFT-LCD) waste glass produced as glass–ceramics

Abstract The waste electrical and electronic equipment (WEEE) directives are designed to deal with the rapidly increasing waste stream comprised of electrical and electronic equipment. Recycling electrical and electronic equipment reduces the quantity of waste going to final disposal. The demand for thin film transistor liquid crystal display (TFT-LCD) panels, commonly used in everyday electronic products, is increasing. Conventionally adopted treatments of TFT-LCD waste glass cannot meet WEEE directives. This study adopts the following operating conditions in fabricating glass–ceramics: sintering temperature of 800–950 °C; sintering time of 6 h; and, temperature increase rate of 5 °C/min. The glass–ceramic samples then underwent a series of tests, including the Vickers hardness, water absorption and porosity tests, to determine product quality. The Vickers hardness was 12.1 GPa when fired at 900 °C for 6 h, and density was 2.4 g/cm 3 and water absorption was 0%. Thus, TFT-LCD waste glass can be regarded as a good glass–ceramic material.

[1]  M. H. Fernandes,et al.  Development and properties of a glass made from MSWI bottom ash , 2006 .

[2]  Kae‐Long Lin.  Use of thin film transistor liquid crystal display (TFT-LCD) waste glass in the production of ceramic tiles. , 2007, Journal of hazardous materials.

[3]  K. Kurzydłowski,et al.  Grain growth in high-purity alumina ceramics sintered from mixtures of particles of different sizes , 1999 .

[4]  Xiaojie Xu,et al.  Nucleation and Crystallization of Na2O · 2CaO · 3SiO2 Glass by Differential Thermal Analysis , 1991 .

[5]  Kae‐Long Lin,et al.  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 , 2007 .

[6]  Final stages of sintering of ceramic materials: Effect of residual porosity and microstructure on mechanical characteristics of surface , 1997 .

[7]  T. S. Cull,et al.  Non-isothermal Calorimetric Studies of the Crystallization of Lithium Disilicate Glass , 1996 .

[8]  T. Cheng,et al.  On formation of CaO-Al(2)O(3)-SiO2 glass-ceramics by vitrification of incinerator fly ash. , 2003, Chemosphere.

[9]  C. H. Lee,et al.  The utilization of thin film transistor liquid crystal display waste glass as a pozzolanic material. , 2009, Journal of hazardous materials.

[10]  J. Shie,et al.  Elucidating the hydration properties of paste containing thin film transistor liquid crystal display waste glass. , 2008, Journal of hazardous materials.

[11]  S. Sakka,et al.  Kinetic study of crystallization of glass by differential thermal analysis—criterion on application of Kissinger plot , 1980 .

[12]  L. Pérez-Maqueda,et al.  Kinetics of the Initial Stage of Sintering from Shrinkage Data: Simultaneous Determination of Activation Energy and Kinetic Model from a Single Nonisothermal Experiment , 2004 .

[13]  Mario Pelino,et al.  Kinetics of phase formation in jarosite glass-ceramic , 1999 .

[14]  Kae‐Long Lin,et al.  Feasibility study of using brick made from municipal solid waste incinerator fly ash slag. , 2006, Journal of hazardous materials.

[15]  A. Karamanov,et al.  Evaluation of the degree of crystallisation in glass-ceramics by density measurements , 1999 .

[16]  P. Pisciella,et al.  FTIR spectroscopy investigation of the crystallisation process in an iron rich glass , 2005 .