The recycling of the wastes towards value added product development has become a prime challenge. In this work, a low thermal expansion glass-ceramic material based on ternary LAS (Li₂O-Al₂O₃-SiO₂) system has been prepared by adopting meltquenching route using industrial waste (blast furnace slag) and low-cost aluminosilicate minerals (China clay and pyrophyllite) at relatively low melting temperature (∼1450°C). A part of the precursor powder for pristine glass has also been prepared by sol-gel processing utilizing Li₂CO₃ and Al(NO₃)₃.9H₂O to obtain better homogeneity in the glass composition vis-à-vis glass-ceramics at lower melting temperature. Thermal properties of the material have been characterized to optimize the nucleation and crystallization temperatures for converting glass to glass-ceramics. Phase structure and surface morphology of the glass-ceramics have been analyzed by X-ray diffraction (XRD) and field emission scanning electron microscopy. XRD study reveals the presence of lithium aluminosilicate as a major phase at the crystallization temperature of 730°C. The developed glass-ceramics show a low thermal expansion coefficient (CTE) value of (19±0.5)×10^–7/°C in the temperature range of 30°-500°C. The present work can unfold an avenue towards conversion of waste into wealth in the form of low CTE glass-ceramics for possible application as cook-top plate of LPG gas oven.

将废物回收用于增值产品开发已成为一项主要挑战。在这项工作中，采用工业废料（高炉矿渣）和低成本硅铝酸盐采用熔淬路线制备了一种基于三元LAS（Li ₂ O-Al ₂ O ₃ -SiO ₂ ）体系的低热膨胀微晶玻璃材料熔化温度相对较低（~1450°C）的矿物（瓷土和叶腊石）。_{一部分用于原始玻璃的前体粉末也已通过使用 Li 2} CO ₃和 Al(NO ₃ ) ₃ .9H ₂的溶胶-凝胶工艺制备O 在较低的熔化温度下获得玻璃成分相对于玻璃陶瓷更好的均匀性。该材料的热性能已被表征，以优化将玻璃转化为玻璃陶瓷的成核和结晶温度。通过 X 射线衍射 (XRD) 和场发射扫描电子显微镜分析了微晶玻璃的相结构和表面形貌。XRD 研究表明，在 730°C 的结晶温度下，铝硅酸锂作为主要相存在。所开发的微晶玻璃具有 (19±0.5)×10 ^{–7的低热膨胀系数 (CTE) 值}/°C 在 30°-500°C 的温度范围内。目前的工作可以开辟一条以低 CTE 微晶玻璃的形式变废为宝的途径，可能用作 LPG 燃气烤箱的炉灶面。