CAJ | 학술논문

采用传统固相反应方法在系列烧结温度下烧结制备了BaTiO3陶瓷，并对陶瓷样品的晶体结构、表面形貌、介电、压电和铁电性能进行了测试和分析.结果表明，系列烧结温度下陶瓷的室温晶体结构均为四方结构；烧结温度在1400℃时陶瓷表面晶界清晰，晶粒生长较为均匀，平均晶粒尺寸约为30μm；变温介电谱显示所有样品的四方-立方的铁电-顺电相变温度均在400K附近，但其三斜-单斜和单斜-四方铁电相相变温度随烧结温度的不同而有所变化；烧结温度对陶瓷的压电性能影响较大，当烧结温度为1400℃时，陶瓷压电系数最大为193pC/N，此时ε=2105，tanδ=3.23%，kp=14.3%，Pr=10μC/cm2.
채용전통고상반응방법재계렬소결온도하소결제비료BaTiO3도자，병대도자양품적정체결구、표면형모、개전、압전화철전성능진행료측시화분석.결과표명，계렬소결온도하도자적실온정체결구균위사방결구；소결온도재1400℃시도자표면정계청석，정립생장교위균균，평균정립척촌약위30μm；변온개전보현시소유양품적사방-립방적철전-순전상변온도균재400K부근，단기삼사-단사화단사-사방철전상상변온도수소결온도적불동이유소변화；소결온도대도자적압전성능영향교대，당소결온도위1400℃시，도자압전계수최대위193pC/N，차시ε=2105，tanδ=3.23%，kp=14.3%，Pr=10μC/cm2.
Pure BaTiO3 ceramics were prepared by the conventional solid-state reaction technique at various sintering temperatures. The crystalline structures, microstructures, piezoelectric, dielectric and ferroelectric charac-teristics of the simples were investigated. The results indicate that:all the samples possess tetragonal structure;For all the ceramics the phase temperature of tetragonal phase to cubic phase are all near 400K, but the other phase tran-sition temperatures of triclinic phase to monoclinic phase and monoclinic phase to tetragonal phase are change with the different sintering temperature;The sintering temperatures have a great influence on piezoelectric properties;The BaTiO3 ceramic sintered at 1400 degree exhibit optimal piezoelectric properties. d33=193pC/N , ε=2105 , tanδ=3.23%, kp=14.3%, Pr=10μC/cm2.