摘要BaTiO3原料粉体主要被分为两种尺寸，分别是微米级BaTiO3粉体和纳米级BaTiO3粉体。本实验以这两种尺寸的粉体为原料烧结陶瓷，然后对陶瓷的密度、收缩率和显微结构进行对比和分析。其中微米级BaTiO3粉体是通过固相烧结法进行制备，而纳米级BaTiO3粉体则是通过溶胶-凝胶法制备。将由两种不同粉体尺寸制备的坯体烧结成陶瓷后对陶瓷的直径、厚度和质量进行测量与分析。在1100℃、1200℃、1250℃、1300℃和1350℃五个不同的烧结温度下进行烧结，得出纳米级粉体和微米级粉体烧结BaTiO3陶瓷的最佳烧结温度为1350℃；在1h、2h、3h和4h四个不同的保温时间下进行煅烧，得出烧结陶瓷的最佳保温时间为3h。最佳烧结条件下烧结出的微米级BaTiO3密度为5。27g/cm3而纳米级BaTiO3的密度为5。00g/cm3，微米BaTiO3陶瓷密度比纳米的多了0。27g/cm3。此条件下微米级BaTiO3的收缩率为8。7%而纳米级BaTiO3的收缩率则高达15。15%，两者收缩率之间差了6。415%。86468

毕业论文关键词：BaTiO3；晶粒尺寸；固相烧结法；溶胶-凝胶法；收缩率

Abstract BaTiO3 powder is mainly pided into two kinds of sizes, which are micron sized BaTiO3 powder and nanometer grade BaTiO3 powder。 In this experiment, the two sizes of powder as raw materials, and then the density, shrinkage rate and microstructure of the ceramics were compared and analyzed。 The micron grade BaTiO3 powder was prepared by solid phase sintering, and the nanometer BaTiO3 powder was prepared by the sol gel method。 The diameter, thickness and quality of ceramics were measured and analyzed by two different powders prepared by different sizes of sintered bodies。 In 1100℃, 1200℃, 1250℃,1300℃and 1350℃five different sintering temperature sintering and obtained the optimal sintering temperature of nanometer powder and micron powder sintered BaTiO3 ceramics is 1350℃; were calcined at 1h, 2h, 3h, 4h four different holding time under, ceramic sintering the best heat preservation time is 3h。 The BaTiO3 density of the sintered micron grade BaTiO3 is 5。27g/cm3 while the density of the nano scale 5。00g/cm3 is, the density of the micron BaTiO3 ceramic is much more than that of the 0。27g/cm3。 Under this condition, the shrinkage rate of micron grade BaTiO3 was 8。7%, and the shrinkage rate of nano scale BaTiO3 was 15。15%, and the shrinkage rate was 6。415%。

Key words: BaTiO3; Grain size; Solid sintering technology; Sol-gel method; Shrinkage rate

目  录

第一章 绪论 1

1。1 引言 1

1。2 BaTiO3陶瓷的结构与性能 1

1。3 BaTiO3粉体的制备方法 4

1。4 课题研究的意义及研究方法 6

第二章 BaTiO3陶瓷烧结实验研究 8

2。1 实验设备的介绍及注意事项 8

2。2 实验材料的准备与合成 10

2。2。1 微米级粉体的合成 10

2。2。2 纳米级粉体的合成 12

2。3 坯体的制备 15

2。4 坯体的烧结及实验数据的相关测量 15

第三章 粉料尺寸对BaTiO3陶瓷的性能影响及其机理 17

3。1 陶瓷最佳烧结温度的确定 17

3。2 陶瓷最佳保温时间的确定- 19

3。3粉料尺寸对陶瓷性能的影响