Abstract The effect of the particle size of quartz and K- feldspar on the sintering behaviour and technical properties of semi transparent porcelain were investigated. This study was implemented by “the Factorial Experimental Design Method” to determine the effect of factors on semi vitreous porcelain production. The sintering behaviour of the samples were examined by using an optical dilatometer. The phases and their respective amounts in the microstructure were determined by way of Rietvelt X- ray diffraction (XRD) technique. Furthermore, the values such as shrinkage, water absorption, bulk density, porosity, thermal expansion, light transmission measurements were taken on the samples and the microstructures were studied by SEM. It was observed that as the particle size of quartz and K- feldspar decreased; the viscosity of the liquid phase fell down, the relative amount of secondary mullite crystals increased and the large pores were removed among the particles and the densification rate increased. Data were analysed by Minitab 13.20 software, and assessed in relation to the amount of glassy phase and its viscosity. The effect of K- feldspar particle size on the densification of porcelain is less than the change of heat treatment and quartz particle size.

中文翻译：

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体成分粒径对半透明瓷加工参数的影响

摘要 研究了石英和钾长石的粒径对半透明瓷的烧结行为和工艺性能的影响。本研究采用“析因实验设计法”来确定因素对半玻璃瓷生产的影响。通过使用光学膨胀计检查样品的烧结行为。通过 Rietvelt X 射线衍射 (XRD) 技术确定微观结构中的相和它们各自的量。此外，还对样品进行了收缩率、吸水率、堆积密度、孔隙率、热膨胀、透光率测量等值，并通过 SEM 研究了微观结构。观察到，随着石英和钾长石的粒径减小；液相黏度下降，次生莫来石晶体相对量增加，颗粒间大孔被去除，致密化率提高。数据通过 Minitab 13.20 软件进行分析，并根据玻璃相的量及其粘度进行评估。钾长石粒径对瓷器致密化的影响小于热处理和石英粒径的变化。