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The Synthesis and Structure of New Perovskite-type Niobate Processed in Millimeter Wave Field

机译：毫米波场中新型钙钛矿型铌酸盐的合成与结构

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摘要

In present paper a new niobate materials Ba_5Li_xTi_xNb_(10-x)O_(30) were synthesized by doping Li~+ in the system BaO- TiO_2 Nb_2O_5 in millimeter wave field. X-ray diffraction (XRD) quantitative and scanning transition spectroscopy (SEM) analysis were employed to study crystal structure and microstructure of reaction products. It was found that pure products could be obtained at temperature 900℃, 8 min which is lower comparing with that by conventional method. The XRD data shown the crystal belongs to tetragonal tungsten bronze structure with space group P4bm. The grain size synthesized in millimeter wave field had smaller size, narrower distribution, better sinter-ability, and without hard agglomeration comparing whit that obtaining from conventional synthesis. At lower temperature Ba_5LiTiNb_9O_(30) is a tetragonal ferroelectric phase.
机译：本文通过在毫米波场的BaO-TiO_2 Nb_2O_5体系中掺杂Li〜+，合成了一种新的铌酸盐材料Ba_5Li_xTi_xNb_（10-x）O_（30）。利用X射线衍射（XRD）定量分析和扫描跃迁光谱（SEM）分析研究了反应产物的晶体结构和微观结构。结果表明，在900℃，8min的温度下可以得到纯净的产物，比常规方法要低。 XRD数据表明该晶体属于四方钨青铜结构，空间群为P4bm。与常规合成相比，毫米波场合成的晶粒尺寸更小，分布更窄，烧结性更好，并且没有硬团聚。在较低温度下，Ba_5LiTiNb_9O_（30）是四方铁电相。

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