高锆 Si-Al-Zr-O 系微晶陶瓷的研究进展

这是一篇陶瓷及复合材料领域的论文。以攀枝花本地的天然矿物原料高岭土和含铁质的红泥，添加钾长石为助熔剂，采用一步烧结法制备微晶陶瓷，用X射线衍射仪、洛氏硬度计、万能试验机、电子显微镜、热重-热差等测试制备的微晶陶瓷样品进行表征。结果表明：当高岭土含量为27%，钾长石的含量为25%，红泥含量为55%，烧结温度1250 ℃保温90 min，此时的微晶陶瓷吸水率为0.08%、显气孔率为0.15%、洛氏硬度78.48 HRA、抗弯强度51 MPa、主晶相为莫来石相、晶粒直径-6 μm、晶粒含量可达61.35%。此工艺制备的微晶陶瓷呈暗红色，外观平滑光亮，具有温润的玉质感。

Research progress of high zirconium Si-Al-Zr-O system microcrystalline ceramics

This is an essay in the field of ceramics and composites. The microcrystalline ceramics were prepared by a one-step sintering method with kaolin and ferric red mud from Panzhihua, adding potassium feldspar as flux. The microcrystalline ceramics samples were characterized by X-ray diffractometer, Rockwell hardness tester, universal testing machine, electron microscope, thermogravimetric and thermal differential tests. The results show that: When kaolin content is 27%, potassium feldspar content is 25%, red mud content is 55%, sintering temperature is 1250 ℃, holding for 90 min, At this time, the water absorption rate of microcrystalline ceramics is 0.08%, the apparent porosity is 0.15%, the Rockwell hardness is 78.48 HRA, the bending strength is 51 MPa, the main crystal phase is mullite, the grain diameter is less than 6 μm, the grain content can reach 61.35%. The microcrystalline ceramics prepared by this process are dark red, smooth and bright in appearance, and have a warm and moist feeling of jade quality.