无机化学学报
無機化學學報
무궤화학학보
JOURNAL OF INORGANIC CHEMISTRY
2013年
7期
1400-1406
,共7页
彭勇%丁士华%宋天秀%王久石%徐琴%吴小亮
彭勇%丁士華%宋天秀%王久石%徐琴%吳小亮
팽용%정사화%송천수%왕구석%서금%오소량
Ba0.98Bi0.02(Ti0.9Zr0.1)1-xCux03陶瓷%介电弛豫%缺陷偶极子%结晶化学
Ba0.98Bi0.02(Ti0.9Zr0.1)1-xCux03陶瓷%介電弛豫%缺陷偶極子%結晶化學
Ba0.98Bi0.02(Ti0.9Zr0.1)1-xCux03도자%개전이예%결함우겁자%결정화학
Ba0.98Bi0.02(Ti0.9Zr0.1)1-xCuxO3 ceramics%dielectric relaxation%defect dipoles%crystal chemistry
采用固相合成法,Bi3+作施主掺杂A位,Cu2+作受主掺杂B位,制备了Ba0.98Bi0.02(Ti0.9Zr0.1)1-XCuxO3(x=0,0.01,0.02,0.03)陶瓷样品.借助XRD、LCR等研究了该陶瓷的结构与介电性能.结果表明:当x=0.03时,陶瓷样品出现第二相.通过GULP模拟,缺陷偶极子的稳定性从低到高依次为:[2BiBa +V"Ba]、[2BiBa +Cu"Ti/Zr]、[Cu"+V0],结合实验可知:介电弛豫程度与晶体中缺陷偶极子的存在形式相关,其中x=0.01时,晶体中以[2BiBa +CuTi/Zr]为主.随Cu2+掺杂量的增加,介电常数增加,介电常数与B位键价和呈反比变化、与八面体B06的体积呈正比变化.
採用固相閤成法,Bi3+作施主摻雜A位,Cu2+作受主摻雜B位,製備瞭Ba0.98Bi0.02(Ti0.9Zr0.1)1-XCuxO3(x=0,0.01,0.02,0.03)陶瓷樣品.藉助XRD、LCR等研究瞭該陶瓷的結構與介電性能.結果錶明:噹x=0.03時,陶瓷樣品齣現第二相.通過GULP模擬,缺陷偶極子的穩定性從低到高依次為:[2BiBa +V"Ba]、[2BiBa +Cu"Ti/Zr]、[Cu"+V0],結閤實驗可知:介電弛豫程度與晶體中缺陷偶極子的存在形式相關,其中x=0.01時,晶體中以[2BiBa +CuTi/Zr]為主.隨Cu2+摻雜量的增加,介電常數增加,介電常數與B位鍵價和呈反比變化、與八麵體B06的體積呈正比變化.
채용고상합성법,Bi3+작시주참잡A위,Cu2+작수주참잡B위,제비료Ba0.98Bi0.02(Ti0.9Zr0.1)1-XCuxO3(x=0,0.01,0.02,0.03)도자양품.차조XRD、LCR등연구료해도자적결구여개전성능.결과표명:당x=0.03시,도자양품출현제이상.통과GULP모의,결함우겁자적은정성종저도고의차위:[2BiBa +V"Ba]、[2BiBa +Cu"Ti/Zr]、[Cu"+V0],결합실험가지:개전이예정도여정체중결함우겁자적존재형식상관,기중x=0.01시,정체중이[2BiBa +CuTi/Zr]위주.수Cu2+참잡량적증가,개전상수증가,개전상수여B위건개화정반비변화、여팔면체B06적체적정정비변화.
