Žalga Artūras, Gaidamavičienė Giedrė
Department of Applied Chemistry, Faculty of Chemistry and Geosciences, Vilnius University, Naugarduko Str. 24, 03225 Vilnius, Lithuania.
Materials (Basel). 2023 Jan 13;16(2):813. doi: 10.3390/ma16020813.
An aqueous sol-gel preparation technique was applied for the synthesis of calcium-substituted lanthanum molybdate with the initial composition of LaCaMoO. The influence of the substitution effect, which plays a crucial role in the formation of final ceramics, was investigated. The thermal behavior tendencies of phase transition at elevated temperatures from the monoclinic crystal phase to cubic as well as reversible transformation were identified and discussed in detail. It was proved that the phase transformation in the obtained mixture significantly depends only on the impurities' amount, while the partial substitution by calcium atoms above the value of x = 0.05 does not create a homogeneous multicomponent system for LaCaMoO composition.
采用水溶胶-凝胶制备技术合成了初始组成为LaCaMoO的钙取代钼酸镧。研究了取代效应在最终陶瓷形成过程中所起的关键作用。详细确定并讨论了在高温下从单斜晶相到立方相的相变热行为趋势以及可逆转变。结果表明，所得混合物中的相变仅显著取决于杂质含量，而当钙原子的部分取代量超过x = 0.05时，对于LaCaMoO组成不会形成均匀的多组分体系。
