Production and characteristics of substituted lanthanum niobate LaNb1-x W x O4+δ
Production and characteristics of substituted lanthanum niobate LaNb1-x W x O4+δ
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DOI：
10.1134/s0036023617020048
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发表时间：
2017-02-01
影响因子：
2.1
通讯作者：
Tarakina, N. V.
中科院分区：
文献类型：
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作者：
Buyanova, E. S.;Mikhailovskaya, Z. A.;Tarakina, N. V.
研究了LaNb_（1-x）W（x）O_（4 + δ）（x = 0.02-0.10，Δ x = 0.02）固溶体，该固溶体在室温下为单斜晶系（空间群为I2/c），随温度升高，其相转变为四方晶系。通过高温X射线粉末衍射分析了各种改性的稳定性。用交流阻抗谱研究了烧结样品的电导率。插入钨到铌亚晶格导致的固溶体的电导率的增加。
Solid solutions LaNb1-x W (x) O4 + delta (x = 0.02-0.10, Delta x = 0.02) were investigated, which crystallize in the monoclinic system (space group I2/c) at room temperature and undergo a phase transition into the tetragonal modification with increasing temperature. The stability of various modifications was analyzed by high-temperature X-ray powder diffraction analysis. The electrical conductivity of sintered samples was studied by impedance spectroscopy. Insertion of tungsten into the niobium sublattice leads to an increase in the conductivity of the solid solutions.