快速烧成低锆固-液复相乳浊釉的研究

STUDY ON FAST-FIRED LOW ZIRCONIUM SOLID-LIQUID MULTIPHASE OPAQUE GLAZE

本研究选择K2 O -Na2 O -CaO -MgO -ZnO -Al2 O3-B2 O3-SiO2 多元系统 ,不添加或添加少量超细硅酸锆 ,通过优化组成设计及物理化学过程的控制 ,使釉熔体在一次烧成过程中形成分相 -微晶的复相结构 ,实现平滑光亮的釉面外观 .应用SEM ,TEM ,EDS ,XRD等方法 ,对K2 O -Na2 O -CaO -MgO -ZnO -Al2 O3-B2 O3-SiO2 多元系统中所设计组成点的瓷釉物相及显微结构进行了研究 ,指出釉层中大量的分相液滴是造成乳浊的原因 .研究了添加少量硅酸锆对分相过程的影响规律 ,通过设计合理组成及快烧工艺 ,可得到釉面综合质量良好的固

Phases and microstructures of glazes designed in K 2O-Na 2O-MgO-Al 2O 3-B 2O 3-SiO 2 system were investigated by means of SEM, TEM, EDS and XRD. It was pointed out that large amounts of tiny immiscible liquid droplets dispersed in glaze layers resulted in opacification of glaze surfaces. The influence of little amount of zirconium silicate on the formation of phase separation process was studied. Through optimizing composition design and control of the single fast firing process, solid-liquid multiphase opaque glazes of good comprehensive properties can be produced.