仿钧瓷显微结构与呈色的关系

Relation Between Microstructure and Color of Imitation Jun Ware

以KzO-Al2O3-CaO-si02-Pzos生料石灰碱釉为基础组成，采用三角配料法，在还原气氛下于1280℃烧成，制备出釉面颜色分别为铜红、铜蓝、蓝紫和灰黑等样品。研究了仿钧瓷组成和显微结构与呈色的关系，分析了ca3（P04）2含量对釉面呈色的影响。结果表明：在一定Ca3（P04）2含量条件下，Sio2与CaO摩尔比对釉面呈色有显著影响，SiO2与CaO摩尔比在2．5～3．5范围易形成铜红、铜蓝和蓝紫釉面，Si02与caO摩尔比在4．5～10．5易形成灰棕、灰黑亚光釉面；基础组成固定时，Ca3（P04）2含量对釉面呈色和分相结构有显著影响，随Ca3（P04）2含量增加，釉层中分相尺寸明显增大，釉面颜色由红一蓝（紫）一灰红依次变化。组成是形成钧釉多种呈色的基础条件，分相结构则可能改变其釉的基本色调。

The imitation Jun wares with the glaze colors of copper red, copper blue, blue purple and grey black were sintered in reducing atmosphere at 1 280 ℃ in a shuttle kiln by a triangle batching method based on K2 O-A12 Oa-CaO-SiO2 raw lime-alkali glaze basis composite, respectively. The effect of the composition of the Jun ware on the mierostructure and coloring was inves- tigated, and the influence of Caa （PO4 ）2 content on the glaze color was analyzed. The results show that the copper red, copper blue, blue and purple glaze appear at a certain of Caa （PO4 ）2 content and in a SiO2 to CaO mole ratio range from 2.5 to 3.5. The smooth-surface glazes with the gray brown and grey black were obtained in a SiO2 to CaO mole ratio range from 4. 5 to 10.5. Calcium phosphate content affects the color of glaze and the phase splitting in the microstructure at a certain essential composition. The glaze color slightly changes in an order of red-blue （ purple）-red gray. The size of phase separation region in- creases with the increase of calcium phosphate content. It was found that the composition is a basic condition to form the Jun glazes with various colors. However, the phase separation might change the basic color of the glaze.