湿法混合添加氧化铜烧结助剂对铌酸钾的影响
毕业论文关键词：铌酸钾；氧化铜；水热法；铁电性
Abstract In this paper, the potassium hydroxide and niobium pentoxide which was used as thepotassium niobate powder was synthesized by using a heating furnace temperatureitreacted at 220 ℃ for 24 hours in order to give the desired product. Then we use acentrifuge to remove excess potassium hydroxide in the reaction,.Through the drying step,the screening of experiments we need to give is potassium niobate powder. In order to testthe impact of copper oxide,we added the potassium niobate, we also added differentproportions of copper oxide.By the means of XRD, SEM, ferroelectric and otherequipment,we can test that the resulting product was sintered ceramic various parametersand performance.The study showed that the resulting powder made by hydrothermal method is allpotassium niobate. Powder morphology looked like fine needles. As it can be seen from theSEM image of the sample gap between the larger ceramic samples that all samples whichwere placed in the air after two weeks were found to have gradually pulverized trend. Thestudy found that when the content of copper oxide is greater than 8‰ when sinteredceramic appears Nb2O5 phase. With increasing content of copper oxide in thesample ,Nb2O5 phase showed a biphasic trend .By using the meter measurements,it can be found that when the sample does notcontain CuO sintering aid,ferroelectric properties of the sample is becoming much better,but later due to the large number of pores present in the sample, it will absorb water andcarbon dioxide and other impurities in the air which could affect performance , resulting inleakage of the sample.
Key words：KNbO3；CuO；Hydrothermal method；ferroelectricity
目录
第一章绪论.1
1.1引言1
1.2压电材料1
1.2.1压电材料简介1
1.2.2压电材料分类1
1.2.3压电材料的应用2
1.3无铅压电陶瓷.3
1.3.1无铅压电陶瓷的研究意义.3
1.3.2无铅压电陶瓷的分类.3
1.3.3无铅压电陶瓷的制备.5
1.3.4无铅压电陶瓷的性能参数.5
1.4铁电材料7
1.4.1铁电材料的介绍7
1.4.2铁电材料的分类8
1.5水热合成法.9
1.5.1水热合成法简介9
1.5.2水热合成法的特点.9
1.6本课题的目的和意义10
第二章实验部分11
2.1实验的方案.11
2.2材料的成分与制备11
2.2.1实验所需材料及其成份配比.11
2.2.2实验的主要仪器.12
2.2.3实验步骤13
第三章实验结果与分析21
3.1引言.21
3.2XRD分析.21
3.3SEM分析.23
下一篇：金属纳米晶体超导温度的热力学研究