废液晶玻璃再生制备低膨胀硼硅玻璃及其理化性能研究

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

基于废液晶玻璃的高值化再生利用,以废液晶玻璃作为主要原料,石英砂、硼酸、纯碱为辅助原料,制备了低膨胀硼硅玻璃。通过浮力法、压痕法、石英膨胀法和重量试验法,探究了废液晶玻璃和辅助原料(Na_(2)O和B_(2)O_(3))掺量对玻璃理化性能的影响。结果表明:随着废液晶玻璃掺量增加,玻璃密度、线热膨胀系数和耐酸质量损失增大,维氏硬度和耐碱质量损失减小;随着辅助原料中Na_(2)O含量增大,玻璃密度、线热膨胀系数、耐酸质量损失和耐碱质量损失增大,维氏硬度减小;随着辅助原料中B_(2)O_(3)含量增大,玻璃密度和维氏硬度减小,线热膨胀系数和耐酸耐碱质量损失增大;当废液晶玻璃、辅助原料中Na_(2)O和B_(2)O_(3)质量分数分别为60.00%、1.00%和14.72%时,玻璃维氏硬度最大、密度和线热膨胀系数最小,分别为7.1430 GPa、2.3097 g·cm^(-3)和3.5317×10^(-6)℃^(-1);当废液晶玻璃、辅助原料中Na2O和B2O3质量分数为60.00%、3.00%、9.72%时,玻璃耐酸质量损失最小,为0.6140 mg·cm^(-2);当废液晶玻璃、辅助原料中Na2O和B2O3质量分数为70.00%、2.00%、11.67%时,玻璃耐碱质量损失最小,为1.2140 mg·cm^(-2)。

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(Na_(2)O and B_(2)O_(3))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 Na_(2)O content in auxiliary raw materials,the glass density,linear thermal expansion coefficient,acidresistant mass loss and alkali-resistant mass loss increase,while Vickers hardness decreases.With the increase of B_(2)O_(3)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 Na_(2)O and B_(2)O_(3)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 7.1430 GPa,2.3097 g·cm^(-3) and 3.5317×10^(-6)℃^(-1),respectively.When the mass fraction of waste liquid crystal glass and Na_(2)O and B_(2)O_(3) in auxiliary raw materials are 60.00%,3.00%,9.72%,the mass loss of acid resistance is the smallest,which is 0.6140 mg·cm^(-2).When the mass fraction of waste liquid crystal glass and Na_(2)O and B_(2)O_(3) in auxiliary rawmaterials are and 70.00%,2.00%,11.67%,the mass loss of alkali resistance is the smallest,which is 1.2140 mg·cm^(-2)。