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采用固相法合成制备La2/3Sr1/3MnO3∶Agx(LSMO∶Agx,其中x为Ag掺杂量的摩尔比,x=0.00、0.10、0.20、0.30、0.40)多晶材料。通过X射线衍射和R-T对LSMO:Ag x材料的结构和性能进行测试分析。结果表明:La2/3Sr1/3MnO3∶Agx(x=0.00,0.10,0.20,0.30,0.40)多晶样品,x=0.00样品研磨后的粉体粒度D50=6.66μm,所有样品都具有正交菱面体结构,没有出现Ag元素的衍射峰,这与Ag在高温烧结时的挥发有关;随着Ag掺杂量从x=0.00增加到x=0.40,样品的晶胞体积在348.6~350.6魡,说明Ag并没有有效替位掺杂,主要以晶界析出为主;随着Ag掺杂量的增加,电阻率归一化值随之下降,样品电阻率降低;LSMO∶Ag x多晶材料T p值在253~298K,且随组分增加呈上升趋势。
La2 / 3Sr1 / 3MnO3: Agx (LSMO: Agx, where x is the molar ratio of Ag doping, x = 0.00, 0.10, 0.20, 0.30, 0.40) polycrystalline material was synthesized by a solid phase method. The structure and properties of LSMO: Ag x materials were analyzed by X-ray diffraction and R-T. The results showed that the grain size of La2 / 3Sr1 / 3MnO3:Agx (x = 0.00,0.10,0.20,0.30,0.40) polycrystalline samples with x = 0.00 was milled with D50 = 6.66μm, and all the samples had orthogonal rhombohedral Structure, there is no diffraction peak of Ag element, which is related to the volatilization of Ag at high temperature sintering. With the increase of Ag doping amount from x = 0.00 to x = 0.40, the unit cell volume of the sample is 348.6 ~ 350.6 魡, indicating that Ag And there is no effective substitutional doping, mainly in the grain boundary precipitation; with the increase of Ag doping, the normalized resistivity value decreases, the sample resistivity decreases; LSMO: Ag x polycrystalline material T p value In 253 ~ 298K, and with the increase of components showed an upward trend.