摘要
采用溶胶凝胶法制备了Ag掺杂的铈酸钡基质子导体BaCe_(1-x)Ag_(x)O_(3-δ)(x=0~0.08)钙钛矿型系列氧化物。通过XRD、SEM表征了前驱体、1 000℃焙烧粉体和1 250~1 350℃烧结样品的物相结构和微观形貌。结果表明:1 000℃时,BaCe_(1-x)Ag_(x)O_(3-δ)(x=0~0.08)焙烧后样品均呈现单一钙钛矿相,属于单斜晶系。Ag的掺杂将铈酸钡的烧结温度从1 600℃降至1 350℃,高温烧结后颗粒排列紧密。Ag的掺杂显著提高样品的电化学性能,激活能随着烧结温度升高而降低,测试温度为550℃时,1 350℃BaCe_(0.92)Ag_(0.08)O_(3-δ)样品电导率最高为1.98×10^(-5)S/cm,激活能最低为0.715 eV。
Ag-doped barium ceria-based proton conductor BaCe_(1-x)Ag_(x)O_(3-δ)(x=0-0.08)perovskite series oxides were prepared via sol-gel method.The phase structure and microstructure of the precursor, powders calcined at 1 000 ℃ and samples calcined at 1250~1350 ℃ were characterized by XRD and SEM.The results show that at 1 000 ℃,BaCe_(1-x)Ag_(x)O_(3-δ)(x=0-0.08)samples all exhibit a single perovskite phase, which belongs to monoclinic system.Ag doping reduces the sintering temperature of barium cerate from 1 600 ℃ to 1 350 ℃,and the cells are tightly arranged after sintering at high temperature.Ag doping significantly improved the electrochemical performance of the samples, and the activation energy decreased with the increase of sintering temperature.At 550 ℃ test temperature, the highest conductivity of BaCe0.92Ag_(0.08)O_(3-δ)was 1.98×10^(-5)S/cm, the lowest activation energy of BaCe_(0.92)Ag_(0.08)O_(3-δ)sintered at 1 350 ℃ is 0.715 eV.
作者
谭喜瀚
康雪
侯剑峰
张正阳
张胜梅
TAN Xihan;KANG Xue;HOU Jianfeng;ZHANG Zhengyang;ZHANG Shengmei(Department of Chemistry and Chemical Engineering,Lyuliang University,Lyuliang 033001,China;BGRIMM Technology Group,Beijing 100160,China)
出处
《有色金属工程》
CAS
北大核心
2023年第3期9-17,共9页
Nonferrous Metals Engineering
基金
山西省回国留学人员科研资助项目(2022-182)
山西省高等学校科技创新项目(2021L564)
吕梁市引进高层次科技人才重点研发项目(Rc2020214)。
关键词
钙钛矿
AG掺杂
电导率
掺杂改性
perovskite
Ag doping
electrical conductivity
doping modification
作者简介
谭喜瀚(1986-),男,博士,讲师,主要从事钙钛矿型固体电解质合成研究。
