清水泥紫砂矿料工艺矿物学研究及其烧成品微观结构研究

The Study of Minerology of Qingshui Zisha Clay Mineral and the Microstructure of Sintering Products

中国宜兴拥有独特的紫砂泥矿产资源,但是对宜兴紫砂矿料及其烧成品的科学系统研究还鲜少报道,不利于对紫砂矿产的保护和利用。宜兴清水泥被作为经典代表来研究,采用XRD、XRF、SEM、压汞计和EDS方法,分析了其成分和烧成品的微观形貌。结果表明,清水泥紫砂矿料样品主要由57.0%石英、12.3%赤铁矿、14.3%高岭石、13.0%伊利石以及3.4%蒙脱石组成,其烧成样品的微观结构显示出大量的多级次孔道结构。该种微观形貌的形成是由紫砂烧结过程中的液相量不足以及液相中含有大量的铁离子共同所致。紫砂陶瓷孔道的形成研究为宜兴紫砂矿产资源在多孔陶瓷材料领域的应用指出了方向。

It is well known that there are unique Zisha clay mineral resources in Yixing,China.However,until now,very few works have been reported on them and the corresponding sintering products.This is unfavorable to the protection and application of the Zisha clay mineral resources.Yixing Qingshui Zisha clay has been studied as an example.The composition of the Qingshui Zisha clay and the microstructures of the corresponding sintering products were analyzed by XRD,XRF,SEM,mercury porosimetry,and EDS.The results show that Qingshui Zisha clay is comprised of 57.0%quartz,12.3%hematite,14.3%kaolinite,13.0%illite,and 3.4%montmorillonite,and the sintering Qingshui Zisha pottery has rich hierarchical pore structures.It is demonstrated that the microstructures of Zisha pottery result from a lack of liquid and the high content of Fe ions in liquid during the sintering of Qingshui Zisha clay.The study of formation mechanism of Zisha pore structures indicates the future application in porous ceramics of Yixing Zisha clay mineral resources.