IF 0.7 4区化学

无机化学学报 Pub Date : 2013-01-01 DOI: 10.3969/J.ISSN.1001-4861.2013.00.155

Xu Jiahuan, X. Jun, Ye Qin, Guo Yin-tao

{"title":"Effect of Strontium and Cobalt Co-doping on the Structural and Electrical Properties of PrAlO_3 Perovskite Oxides","authors":"Xu Jiahuan, X. Jun, Ye Qin, Guo Yin-tao","doi":"10.3969/J.ISSN.1001-4861.2013.00.155","DOIUrl":"https://doi.org/10.3969/J.ISSN.1001-4861.2013.00.155","url":null,"abstract":"Novel Sr-and Co-codoped(Pr,Sr)(Al,Co)O3-δ perovskite oxide conducting ceramics were prepared by citrate process combined with subsequent high-temperature sintering.The phase composition,microstructure and electrical properties of the obtained ceramics were characterized by XRD,SEM and direct current four-wire method.The experimental results show that all the as-prepared Pr0.9Sr0.1Al1-yCoyO3-δ(y=0.1~0.5) ceramics are a single-phase rhombohedral perovskite structure,and their unit cell volumes,relative densities and electrical conductivities increase with increasing y in the doping range,while the increasing rate in electrical conductivity progressively decrease.Furthermore,these samples are a mixed conductor of oxygen ion and hole in air and their electrical conductivities are absolutely dominated by p-type conduction.The temperature dependence of electrical conductivity for Pr0.9Sr0.1Al1-yCoyO3-δ can be described by the small polaron hopping mechanism.For the as-prepared Pr1-xSrxAl0.5Co0.5O3-δ(x=0.1~0.4) ceramics,a second phase(Pr,Sr)CoO3obviously precipitates when x=0.2,indicating that the solid solubility limit of Sr on A site in this system is between 10at% and 20at%,and the(Pr,Sr)CoO3phase in samples increases gradually and finally becomes the main phase with further increase in Sr content.It is found that the electrical conductivity of Pr1-xSrxAl0.5Co0.5O3-δ ceramics roughly exhibits a trend of first increase and then decrease with increasing x in the whole examined temperature range,and reaches the maximum value at around x= 0.3.Additionally,the semiconductor-to-metal transition in the conduction behavior is obviously observed for the samples with x≥0.2,and the transition temperature gradually decreases with increasing Sr content.","PeriodicalId":9986,"journal":{"name":"无机化学学报","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2013-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90481170","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

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IF 0.7 4区化学

无机化学学报 Pub Date : 2013-01-01 DOI: 10.3969/J.ISSN.1001-4861.2013.00.220

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IF 0.7 4区化学

无机化学学报 Pub Date : 2012-08-10 DOI: 10.3969/J.ISSN.0251-0790.2012.08.006

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IF 0.7 4区化学

无机化学学报 Pub Date : 2008-01-01 DOI: 10.5353/th_b4150877

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引用次数: 0

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IF 0.7 4区化学

无机化学学报 Pub Date : 1900-01-01 DOI: 10.11862/CJIC.2015.185

Huang Jia-hua, Deng‐Ke Wei, Jiang Xuan-Feng, Yu Shu-yan

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