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原始粉料对Sr_0.4Ba_0.6Nb₂O₆烧结性能与显微结构的影响

Effect of Starting Powders on the Sintering Behavior and Microstructure of Sr_0.4Ba_0.6Nb₂O₆ Ceramics

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【Author】 HUANG Qing-Wei, WANG Pei-Ling, CHENG Yi-Bing, YAN Dong-Sheng(State Key Lab of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China;Department of Materials Engineering, Monash University, Victoria, 3168, Australia)

【机构】中国科学院上海硅酸盐研究所高性能陶瓷和超微结构国家重点实验室；澳大利亚Monash大学材料工程系上海 200050；上海 200050；维多利亚州 3168；

【摘要】对比了以单相Sr0.4Ba0.6Nb2O6为原料的常规烧结试样(SBN40)以及以SrNb2O6与BaNb2O6混合物为原料的反应烧结试样(RSBN40)的烧结性能与显微结构.结果发现,RSBN40试样的致密化速率较SBN40试样较慢,试样SBN40与RSBN40密度分别在1250与1300℃达到最大,其值分别为5.21与5.27g·cm-3.此外,当烧结温度高于1250℃时,试样SBN40比RSBN40易于出现异常晶粒长大现象.更多还原

【Abstract】 The sintering behaviors and microstructures of reaction-sintered Sr0.4Ba0.6Nb2O6 (RSBN40) using mixture of SrNb2O6 and BaNb2O6 as the starting powders were compared with that of normal sintered Sr0.4Ba0.6Nb2O6 (SBN40) with single-phase Sr0.4Ba0.6Nb2O6 powders as starting powders. The experimental results show that the densification rate of SBN40 is faster than that of RSBN40. Densities of samples SBN40 and RSBN40 reach the maximum, 5.21 and 5.27g·cm-3 at 1250 and 1300℃, respectively. In addition, abnormal grain growth occurs more easily in sample SBN40 than in sample RSBN40 at the sintering temperatures above 1300℃.更多还原