摘要
用溶胶-凝胶法制备Ce_(0.8)Gd_(0.2-x)Ba_(x )O_(2-δ)(x=0~0.08)粉体,经干粉压制成型,在不同温度下烧结,得到烧结体;对Ce_(0.8)Gd_(0.2-x)Ba_(x )O_(2-δ)材料的相结构、烧结性能和电性能等进行测试。结果表明:溶胶-凝胶法制得的干凝胶在700℃煅烧2 h可得单一立方萤石结构的电解质粉体;压制成型的压坯经1 400℃烧结后形成相对密度达98%的致密结构;Ce_(0.8)Gd_(0.2-x)B‐a_(x )O_(2-δ)烧结体的电导率随温度升高而增大,且随BaO掺杂量增加先升后降,Ce_(0.8)Gd_(0.16)Ba_(0.04)O_(2-δ)烧结体试样的电导率最高,在700℃时可达2.46×10^(-2)S/cm。
Ce_(0.8)Gd_(0.2-x)Ba_xO_(2-δ)(x=0-0.08) powder was prepared by sol-gel method,and its sintered body was obtained by dry powder pressing and sintering at different temperatures.The phase compositions,the sintering behavior,and the electrochemical properties of Ce_(0.8)Gd_(0.2-x)Ba_xO_(2-δ) sample were investigated.The results show that electrolyte powder with a single-phase cubic fluorite structure can be formed by calcining the xerogel prepared by sol-gel method at 700 ℃ for 2 h.The compression molding sample will form compact structure with a relative density of up to 98% after sintering at 1 400 ℃.The electrical conductivity of the Ce_(0.8)Gd_(0.2-x)Ba_xO_(2-δ) sintered body increases with the increase of temperature.With the increase of BaO doping amount,the conductivity increases firstly and then decreases.The Ce_(0.8)Gd_(0.16)Ba_(0.04)O_(2-δ) sample has the highest electrical conductivity of 2.46×10~(-2) S/cm at 700 ℃.
作者
朱旭航
陈雨婷
程继海
ZHU Xuhang;CHEN Yuting;CHENG Jihai(School of Energy Materials and Chemical Engineering,Hefei University,Hefei 230601,China)
出处
《兵器材料科学与工程》
CAS
CSCD
北大核心
2023年第3期54-58,共5页
Ordnance Material Science and Engineering
基金
安徽省自然科学基金(2108085ME152)
合肥学院人才科研基金(21-22RC34)。
