摘要
利用冷压-烧结技术制备了BaO掺杂的10NiO-NiFe2O4复合陶瓷,研究了BaO掺杂量对10NiO—NiFe2O4复合陶瓷物相组成及电导率的影响。结果表明,当BaO掺杂量为0~4%(质量分数)时,烧结样品中主要含有NiO和NiFe2O4两种,BaO促进了致密化烧结,降低了烧结温度;TG—DSC分析发现,在303~1233K温度范围内,10NiO-NiFe2O4陶瓷在空气气氛中先吸氧后失氧;导电率测试表明,掺杂BaO能显著提高材料的高温电导率,且掺杂0.5%样品在1233K时材料达到最大电导率11.76S/cm,是未掺杂样品的12.8倍.
The BaO doped 10NiO- NiFe2O4 composite ceramics were prepared with the cold isostatic pressing-sintering process, the effects of BaO content on the phase composition and electrical conductivity of 10NiO- NiFe2O4 composite ceramics were studied. The results show that the samples are mainly consisted of NiO and NiFe2O4 when content of BaO is 0-4% (mass fraction),BaO is important to accelerate the sintering densification and reduce sintering temperature. The analysis of TG-DSC find,the 10NiO- NiFe2O4 composite ceramics have an oxygen-losing process after gaining oxygen in the range of 303-1233K. The electrical conductivity tests show, the conductivity of 10NiO- NiFe2O4 composite ceramics doped BaO improves remarkably. When the mass fraction of BaO was 0.5% ,the conductivity of the sample was 11.76S/cm in 1233K,which was 12.8 times of the samples without BaO.
出处
《功能材料》
EI
CAS
CSCD
北大核心
2009年第4期635-638,共4页
Journal of Functional Materials
基金
国家重点基础研究发展计划(973计划)资助项目(2005CB623703)
国家自然科学创新团队资助项目(50721003)
国家高技术研究发展计划(863计划)资助项目(2008AA030501)