烧结
陶瓷
材料科学
铜
锌
相(物质)
电介质
晶间腐蚀
分析化学(期刊)
微波食品加热
液相
透射电子显微镜
微观结构
扫描电子显微镜
矿物学
冶金
复合材料
化学
纳米技术
光电子学
有机化学
物理
热力学
量子力学
色谱法
作者
Dong‐Wan Kim,Kyung‐Seok Ko,Kug Sun Hong
标识
DOI:10.1111/j.1151-2916.2001.tb00830.x
摘要
The effect of CuO additions on the firing temperature of ZnNb 2 O 6 ceramics was investigated using dilatometry, transmission electron microscopy, and X‐ray diffractometry. A 5 wt% CuO addition to ZnNb 2 O 6 ceramics significantly lowered the firing temperature from 1150° to ∼900°C. The presence of a CuO‐rich intergranular phase in the specimen was observed and was evidence of the formation of a liquid phase during sintering. The composition of the liquid phase was (ZnCu 2 )Nb 2 O 8 . In particular, the low‐fired ZnNb 2 O 6 ceramics had good microwave dielectric characteristics— Q × f = 59 500, ɛ r = 22.1, τ f =–66 ppm/ o C. These properties were correlated with the formation of a second phase, (ZnCu 2 )Nb 2 O 8 .
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