CAJ | 학술논문

采用高温固相反应法制备了质子导体BaCe_(0.8-x)Nb_xGd_(0.2)O_(3-δ)(0≤x≤0.45).结合XRD、SEM、EIS等技术对其物相、微观形貌、稳定性及电导率进行了研究.结果表明,在1600℃烧结5h制备的质子导体BaCe_(0.8-x)Nb_xGd_(0.2)O_(3-δ)(0≤x≤0.45)均能保持主相为斜方晶的钙钛矿结构.Nb的加入可明显提高烧结样品的致密性及在CO_2和水蒸气气氛下的稳定性.在湿润H_2/Ar(0.4%,V/V)气氛中800℃下,x=0.1样品的电导率为5.73mS·cm~(-1),电导活化能为0.35 eV,与x=0的样品相当.
채용고온고상반응법제비료질자도체BaCe_(0.8-x)Nb_xGd_(0.2)O_(3-δ)(0≤x≤0.45).결합XRD、SEM、EIS등기술대기물상、미관형모、은정성급전도솔진행료연구.결과표명,재1600℃소결5h제비적질자도체BaCe_(0.8-x)Nb_xGd_(0.2)O_(3-δ)(0≤x≤0.45)균능보지주상위사방정적개태광결구.Nb적가입가명현제고소결양품적치밀성급재CO_2화수증기기분하적은정성.재습윤H_2/Ar(0.4%,V/V)기분중800℃하,x=0.1양품적전도솔위5.73mS·cm~(-1),전도활화능위0.35 eV,여x=0적양품상당.
The proton conductors BaCe_(0.8-x)Nb_xGd_(0.2)O_(3-δ)(0≤x≤0.45)were synthesized by high temperature solid-state reaction method and its phase,microstructure,stability and conductivity were studied by XRD,SEM and EIS.The results showed that the proton conductors BaCe_(0.8-x)Nb_xGd_(0.2)O_(3-δ)(0≤x≤0.45)sintered at 1600℃ for 5h was orthorhombic perovskite structure.With x value increase,the density of samples increased and stability in the presence of H_2O and CO_2 was improved.The conductivity of sample with x=0.1 is 5.73 mS·cm~(-1) in wet H_2/Ar(0.4%,V/V) at 800℃ and its conduction activation energy is 0.35 eV,which corresponds to that of sample with x=0.