Polished ceramic products are currently the most popular in architectural decoration, but a significant amount of ceramic polishing waste (CPW) is produced during the preparation process. Determining how to handle the CPW is a pressing task for enterprises. This work investigated the feasibility of recycling CPW in porcelain tile, and its influence on the phase composition, microstructure, and properties of the ceramic body. The CPW was found to have a similar composition to the traditional ceramics and worked as a flux. The SiC within CPW began to decompose into SiO₂ with CO₂ generation at about 1100°C, resulting in a porous structure. Microstructure observation indicated that a high CPW sample produced sufficient liquid phase when fired at temperatures ≤1100°C, which was not only beneficial for mullite growth but also for matrix densification by the viscous flow mechanism. But a high‐content CPW caused the body to foam or even expand at temperatures >1100°C, thus significantly reducing mechanical properties. Finally, a series of porcelain tiles were successfully prepared with a CPW content of ≤30 wt% at a firing temperature of 1125‐1200°C. The results of this study are considered to be valuable for the utilization of CPW.

中文翻译：

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以陶瓷抛光废料为原料制备的瓷砖的相组成，微观结构和性能

抛光陶瓷产品目前在建筑装饰中最受欢迎，但是在制备过程中会产生大量的陶瓷抛光废料（CPW）。确定如何处理CPW是企业的紧迫任务。这项工作研究了在瓷砖中回收CPW的可行性，以及它对陶瓷体的相组成，微观结构和性能的影响。发现CPW具有与传统陶瓷相似的成分，并作为助熔剂工作。内CPW所述SiC开始分解成SiO ₂与CO ₂在约1100℃下产生热，产生多孔结构。显微组织观察表明，高CPW样品在≤1100°C的温度下焙烧时会产生足够的液相，这不仅有利于莫来石的生长，而且通过黏性流动机制有利于基质的致密化。但是高含量的CPW会使机体在1100°C以上的温度下起泡甚至膨胀，从而显着降低机械性能。最终，在1125-1200°C的烧成温度下，成功制备了一系列CPW≤30 wt％的瓷砖。这项研究的结果被认为对于CPW的利用是有价值的。