釉熔体中Fe_(2)O_(3)的析晶过程及釉面呈色  

Correlation Between Glaze Color and Crystallization Process of Fe_(2)O_(3)in Glaze Melt

作　　者：黄旭春 展红全 刘权 宋艺辉 何沈超 李芾 汪长安[2] 谢志鹏[2] HUANG Xuchun;ZHAN Hongquan;LIU Quan;SONG Yihui;HE Shenchao;LI Fu;WANG Changan;XIE Zhipeng(Department of Material Science and Engineering,Jingdezhen Ceramic University,Jingdezhen 333403,Jiangxi,China;School of Material Science and Engineering,Tsinghua University,Beijing 100084,China)

机构地区：[1]景德镇陶瓷大学材料科学与工程学院,江西景德镇333403 [2]清华大学材料学院,北京100084

出　　处：《硅酸盐学报》2022年第9期2448-2454,共7页Journal of The Chinese Ceramic Society

基　　金：国家自然科学基金(52062020、21661017);江西省自然科学基金(20212BAB204036)。

摘　　要：在Na_(2)O-MgO-CaO-Al_(2)O_(3)-SiO_(2)-P_(2)O_(5)的多元釉系统中,通过研究不同氧化铁含量釉熔体的显微结构及析晶行为规律,揭示了釉面不同呈色的机理。结果表明:磷酸钙促进了釉系统中的分相作用,进而对釉面呈色起到重要作用;当氧化铁浓度较小时,Fe^(3+)以离子形式存在,这时Fe^(3+)以化学发色为主导致釉面呈现墨绿色;随着氧化铁的增加,釉层分相作用加强其相界面增大,入射光在大量的相界面间经过多次的散射和消耗被吸收,最终形成釉面的黑色效果;过量的氧化铁会从釉层硅酸盐网络体系中析出,形成α-Fe_(2)O_(3)纳米晶体导致釉面呈现出红色;釉层的α-Fe_(2)O_(3)纳米晶体继续长大形成针状阵列排布结构,进而对入射光进行相干散射形成釉面的银灰色效果。随着氧化铁用量的变化,化学发色和结构发色的共同作用形成釉面的不同呈色效果。The coloration mechanism of different glazes in Na_(2)O-MgO-CaO-Al_(2)O_(3)-SiO_(2)-P_(2)O_(5) multi-element glaze system was revealed via investigation of the microstructure and crystallization behavior of glaze melts with different iron oxide contents.The results show that the phase separation in glaze is improved by calcium phosphate,which plays an important role in glaze color.Fe^(3+)ions exist at a lower iron oxide content.The chemical color of Fe^(3+)ions results in a dark-green glaze.The phase separation effect of glaze layer increases and the phase interface becomes larger with the increase of iron oxide content.Due to multiple scattering and consumption by massive phase interfaces,the incident light is absorbed and a black glaze appears at an excessive iron oxide content.α-Fe_(2)O_(3)nanocrystals can be precipitated from silicate glaze,and glaze surface appears red color.A needle-like array structure can be formed in the growth ofα-Fe_(2)O_(3)nanocrystals,interfering with an incident light and resulting in silver-gray glaze.It is indicated that the interaction of chemical color and structural color induces different color rendering effects of glaze with the change of iron oxide content.

关 键 词：釉 氧化亚铁 分相 析晶 化学色 结构色 

分 类 号：TQ174.73[化学工程—陶瓷工业]