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首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >Synthesis of Bi(Cu)VO_x compounds by means of a monomode microwave Crystallographic, calorimetric, electrical and low temperature magnetic properties
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Synthesis of Bi(Cu)VO_x compounds by means of a monomode microwave Crystallographic, calorimetric, electrical and low temperature magnetic properties

机译：借助单模微波晶体学，量热，电学和低温磁学性质合成Bi（Cu）VO_x化合物

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摘要

BiVO_x and Bi(Cu)VO_x compounds exhibit various phases as a function of temperature. Syntheses performed by means of a monomode microwave allows the high copper ionic conductor #gamma#-Bi_4Cu_xV_(2-x)O_(11) phase to be obtained rapidly (less than 5 mm). After heating at about 830 K, large crystals, characteristic of this phase, are formed. X-ray diffraction patterns show that this phase coexists with the Bi_4Cu_3V_2O_(14) and BiVO_4 compounds. DSC measurements show on heating the presence of an exothermic peak and two endothermic peaks. On cooling one exothermic peak occurs. Electrical conductivity (under air and oxygen) exhibits for the ionic phase a large scale of values which are close to those previously obtained for a purer material. Magnetic measurements show that the #gamma#-phase is strictly antiferromagnetic between 300 and 2 K. The results are discussed in terms of polytypic structures, and of performances carried out by means of the monomode microwave.
机译：BiVO_x和Bi（Cu）VO_x化合物表现出随温度变化的各种相。通过单模微波进行的合成允许快速获得高铜离子导体＃γ＃-Bi_4Cu_xV_（2-x）O_（11）相（小于5 mm）。在约830 K加热后，形成​​了具有该相特征的大晶体。 X射线衍射图表明该相与Bi_4Cu_3V_2O_（14）和BiVO_4化合物共存。 DSC测量显示加热时存在放热峰和两个吸热峰。在冷却时，出现一个放热峰。电导率（在空气和氧气下）对离子相显示出较大的值，该值与先前为较纯的材料获得的值接近。磁测量表明，＃γ＃相在300至2 K之间严格反铁磁。结果根据多型结构和通过单模微波进行的性能进行了讨论。

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