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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 >Properties of praseodymium-doped bismuth potassium titanate (Bi_(0.5)K_(0.5)TiO_3) synthesised using the soft combustion technique
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Properties of praseodymium-doped bismuth potassium titanate (Bi_(0.5)K_(0.5)TiO_3) synthesised using the soft combustion technique

机译：用软燃烧技术合成b掺杂钛酸铋钾（Bi_（0.5）K_（0.5）TiO_3）的性能

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摘要

Bismuth potassium titanate (Bi_(0.5)K_(0.5)TiO_3; BKT) and praseodymium-doped BKT (Bi_(0.5(1-x))Pr_xK_(0.5)TiO_3; BPKT) powders were synthesised using the soft combustion technique. Fine particles of 10-100 nm of BKT and BPKT were produced. A single phase BKT was obtained with a minimum of 0.5 mol of glycine. Various compounds of Bi_(0.5(1-x))Pr_xK_(0.5)TiO_3 where x = 0.01, 0.03,0.05,0.10,0.15 and 0.20 were prepared. Pure BKT and BPKT powders were obtained after calcination at 800 °C for 3 h. After sintering at 1050°C for 5 h, pure BKT and BPKT pellets were obtained for x = 0 and 0.01. However, for BPKT with x = 0.03, 0.05, 0.10, 0.15 and 0.20, a minor amount of Bi_4Ti_3O_(12) (BIT) secondary phase was present after sintering at 1050 °C for 5 h. The crystallite size and grain size of all the samples followed similar trends, first increasing from x = 0 (undoped BKT) to x = 0.05 and then decreasing above x = 0.05. Among the undoped and doped samples, BPKT with x = 0.05 had the highest dielectric properties (?_r = 713.87) due to its large crystallite size (68.66 nm), large grain size (~435 nm) and high relative density (93.39%).
机译：采用软燃烧技术合成了钛酸铋钾（Bi_（0.5）K_（0.5）TiO_3; BKT）和掺杂的BKT（Bi_（0.5（1-x））Pr_xK_（0.5）TiO_3; BPKT）粉末。产生了10-100nm的BKT和BPKT的细颗粒。用最少0.5摩尔的甘氨酸获得单相BKT。制备了Bi_（0.5（1-x））Pr_xK_（0.5）TiO_3的各种化合物，其中x ＝ 0.01、0.03、0.05、0.10、0.15和0.20。在800°C煅烧3小时后，获得纯BKT和BPKT粉末。在1050°C烧结5小时后，获得x = 0和0.01的纯BKT和BPKT颗粒。但是，对于x = 0.03、0.05、0.10、0.15和0.20的BPKT，在1050°C烧结5 h后，存在少量Bi_4Ti_3O_（12）（BIT）第二相。所有样品的微晶尺寸和晶粒尺寸遵循相似的趋势，首先从x = 0（无掺杂BKT）增加到x = 0.05，然后在x = 0.05以上减小。在未掺杂和掺杂的样品中，x = 0.05的BPKT具有最高的介电性能（？_r = 713.87），因为它具有较大的微晶尺寸（68.66 nm），较大的晶粒尺寸（〜435 nm）和较高的相对密度（93.39％） 。

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