CAJ | 학술논문

采用传统固相反应法制备了 Ca（1- x）Yx Cu3 Ti4 O12（x =0，0.005，0.010，0.015，0.020，0.030，0.040）陶瓷样品.利用 X 射线衍射仪、扫描电子显微镜及高压数字源表等测试手段，对所得样品的微观结构和压敏性能进行了表征，并分析讨论了晶界势垒变化影响体系压敏性能的原因.结果表明，不等价的钇离子（Y3+）钙位掺杂未引起体系结构相变；体系晶粒生长与掺杂量有明显的关联，掺杂改变了样品的致密度及晶界处的化学环境；Y3+掺杂对 CaCu3 Ti4 O12陶瓷材料压敏性能有明显的调控作用，适量掺杂 Y3+（x =0.010~0.020）可显著提高样品的非线性系数和压敏电压.
채용전통고상반응법제비료 Ca（1- x）Yx Cu3 Ti4 O12（x =0，0.005，0.010，0.015，0.020，0.030，0.040）도자양품.이용 X 사선연사의、소묘전자현미경급고압수자원표등측시수단，대소득양품적미관결구화압민성능진행료표정，병분석토론료정계세루변화영향체계압민성능적원인.결과표명，불등개적을리자（Y3+）개위참잡미인기체계결구상변；체계정립생장여참잡량유명현적관련，참잡개변료양품적치밀도급정계처적화학배경；Y3+참잡대 CaCu3 Ti4 O12도자재료압민성능유명현적조공작용，괄량참잡 Y3+（x =0.010~0.020）가현저제고양품적비선성계수화압민전압.
The polycrystalline Ca(1-x)Yx Cu3 Ti4 O12( x = 0,0. 005,0. 010,0. 015,0. 020,0. 030,0. 040) ceramics samples were prepared by traditional solid-state reaction method. The microstructure and non-ohmic properties were characterized by X-ray diffraction,scanning electron microscope and the high-voltage digital source-meter. The effect mechanism of the variation in grain boundary barrier on the non-ohmic properties was also discussed. The results presented that there was no phase transition in Y3 + -doped CaCu3 Ti4 O12 samples,while the grain growth was related to the doping content. Both the density and chemi-cal environment in grain boundary of samples were influenced by doping. The non-ohmic properties of CaCu3 Ti4 O12 ceramics material were modified by Y3 + doping,and both non-linear coefficient and break-down voltage were apparently enhanced by doping with the appropriate content(x = 0. 010 ~ 0. 020).