论文部分内容阅读
采用固相反应法在1673 K合成了CaZr_(1-x)Mg_xO_(3-α)(x=0,0.005,0.01,0.02)陶瓷粉体,在空气中1873K下对材料进行二次烧结10 h.X射线衍射物相分析结果确定合成后的样品中有CaZrO_3基固溶体和微量的MgO存在.为了明确CaZr_(1-x)Mg_xO_(3-α)的电化学性能,采用交流阻抗法在1073~1473 K,富氧气氛(Ar/O_2/D_2O)/(Ar/O_2/H_2O)和富氢气氛(Ar/H_2/H_2O)/(Ar/D_2/D_2O)下测量了固体电解质的电导率及其同位素效应与气氛依赖性.通过检测电导率的H/D同位素效应,确定了固体电解质的质子导电优势区域.结果显示在富氢气氛下,测定的1073~1473 K温度范围内有明显的H/D同位素效应,表明质子是主要的载流子.在富氧气氛下,1073~1273 K温度范围内,质子也是主要的载流子.该材料有可能作为氢传感器的固体电解质.
The solid state reaction method was used to synthesize CaZr_ (1-x) Mg_xO_ (3-α) (x = 0,0.005,0.01,0.02) ceramic powder at 1673 K. The material was secondarily sintered at 1873 K in air for 10 h In order to clarify the electrochemical performance of CaZr_ (1-x) Mg_xO_ (3-α), the AC impedance method was used in the range of 1073 ~ 1473 K , Ar / O 2 / D 2 O / (Ar / O 2 / H 2 O) and hydrogen rich atmosphere (Ar / H 2 / H 2 O) / (Ar / D 2 / D 2 O) were used to measure the conductivity and isotope effect of solid electrolyte And the dependence of the atmosphere on the proton conductivity of the solid electrolyte was determined by measuring the H / D isotope effect of the conductivity.The results showed that there were obvious H / D isotopes in the 1073 ~ 1473 K temperature range in the hydrogen-rich atmosphere Effect, indicating that protons are the main charge carriers.The proton is also a main carrier in the oxygen-enriched atmosphere at a temperature in the range of 1073 to 1273 K. This material may serve as a solid electrolyte for hydrogen sensors.