英语翻译钛酸铋基无铅压电陶瓷具有居里温度高,介电常数低,老化速率小等特点,适用与高温高频的工作环境.由因为其组成中不含铅

英语翻译
钛酸铋基无铅压电陶瓷具有居里温度高,介电常数低,老化速率小等特点,适用与高温高频的工作环境.由因为其组成中不含铅元素,对环境污染小,使其成为近年来无铅压电陶瓷材料研究热点之一.同时钛酸铋的层状结构使其具有两个缺点：一是矫顽电场高,不利于极化；二是其自发极化的转向受两维空间限制,造成压电活性低.为了改善其压电性能,通常从搀杂改性和工艺改性两方面来考虑.
本论文通过模板法制备钛酸铋基无铅压电陶瓷,以Bi4Ti3O12(简称BIT)为模板制备钛酸铋基无铅压电陶瓷,通过中间模板BIT制备了Na0.5Bi0.5TiO3(简称NBT),（Na0.84K0.16）0.5Bi0.5TiO3(简称KNBT).并采用XRD和扫描电镜等手段分析了粉体的物像组成和形貌.并测试了样品的压电性能.在制备BIT模板和通过BIT模板制备NBT,KNBT的过程中均采用了熔盐法.本论文还探讨了预烧温度,不同熔盐及熔盐含量对粉体形貌及压电性能的影响,实验结果表明在熔盐百分比为100%（熔盐与粉体的质量百分比）,用NaCl和KCl的混合盐作为熔盐.在1000℃烧成温度下合成的粉体片状结构较为明显,各向异性程度高,且杂质含量较少

Bi4Ti3O12-free piezoelectric ceramic with a high Curie temperature,low dielectric constant,the rate of aging of the characteristics of small,high temperature and apply high-frequency work environment.Because of its components from the lead element of the environment of small,making it a lead-free piezoelectric ceramic materials in recent years on one of the hot spots.At the same time Bi4Ti3O12 the layered structure so that it has two drawbacks:First,the coercive electric field,not conducive to polarization; second,it is subject to spontaneous polarization of the two-dimensional space constraints,resulting in low piezoelectric activity.In order to improve its piezoelectric properties,usually from a mix of modified and modified two aspects to consider.This paper prepared by the template Bi4Ti3O12-free piezoelectric ceramic,to Bi4Ti3O12 (referred to BIT) as a template of Bi4Ti3O12-free piezoelectric ceramic,by the middle of a template BIT Na0.5Bi0.5TiO3 (referred to NBT) ,(Na0.84K0.16) 0.5Bi0.5TiO3 (referred to KNBT).And by XRD and scanning electron microscopy and other means of a powder-like composition and morphology.And test a sample of piezoelectric properties.BIT template in the preparation and adoption of BIT template of NBT,KNBT are used in the process of the flux method.This paper also discussed the pre-temperature,different molten salt and molten salt content on the morphology of powder and piezoelectric properties of the experimental results showed that the percentage of the molten salt was 100% (molten salt and the quality of powder percentage),with NaCl And KCl as the molten salt mixture.In 1000 ℃ firing temperature of the powder sheet structure more apparent,a high degree of anisotropy,and the impurities in less