Synthesis and electrical properties of aurivillius phases in the Bi2MoO6-Bi2VO5.5 systemстатья
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Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
Аннотация:To search for new oxygen conductive phases, a series of Bi2V1-xMoxO5.5+x/2 ceramic samples have been synthesized in which the extreme compositions Bi2VO5.5 (x = 0) and Bi2MoO6 (x = 1) are single-layer Aurivillius phases having ferroelectric properties and high ionic oxide conductivity. It is established that single-layer Aurivillius phases exist in the composition ranges 0 <= x <= 0.1 and 0.9 <= x <= 1. Additional phases with BiVO4 and Bi6Mo2O15 structures are found in the range 0.2 <= x <= 0.8. The presence of molybdenum stabilizes the orthorhombic beta-Bi2VO5.5 phase at room temperature. The conductivity of solid solutions based on Bi2VO5.5 differs only slightly from that of pure bismuth vanadate. Conductivity of solid solutions based on Bi2MoO6 is half an order of magnitude higher than that of pure bismuth molybdate.