Ce/Y掺杂BaZrO 3 陶瓷的巨大介电性能和湿敏性能
发布时间：2022-10-05 14:34
Ce/Y掺杂的BaZrO3陶瓷是重要的固态氧化物燃料电池电解质材料,其介电性能及其对环境湿度的敏感性能直接影响电池的性能,为此,本论文的重点研究Ce和Y双掺杂BaZr03陶瓷的介电性能和湿敏性能,选择致密的BaZr0.1Ce0.7Y0.2O3-δ和Ba2r0.4Ce0.4Y0.2O3-δ陶瓷作为研究对象,采用甘氨酸硝酸盐燃烧方法制备得到样品,对其介电特性和湿敏特性进行了系统研究。得到的结果如下:（1 BaZr0.1Ce0.7Y0.203-δ和BaZr0.4Ce0.4Y0.2O3-δ陶瓷在低于约600K的温度下表现出巨介电行为,巨介电行为由两个弛豫组成,其中低温和高温弛豫分别由氧空位（Vo-.）和羟基离子（OHo）与Y3+离子形成的偶极子对引起的;在高于600 K的温区,样品显示出两个介电常数超过106的介电常数峰。低温介电常数峰是离子跳跃运动引起的伪弛豫铁电行为,高温介电常数峰是由负电容效应引起的。（2）通过改变水蒸气含量研究了BaZr0.4Ce0.4Y0）.2O3-δ（BZCY）的电容响应,在不同相对湿度（RH）下对样品进行了进行阻抗谱和DC偏压测量,探索了BZCY的湿度敏感性质。结...
【文章页数】：56 页
【学位级别】：硕士
【文章目录】：
摘要
Abstract
Chapter 1 Introduction
1.1 Background
1.2 Dielectric
1.2.1 Dielectric concept
1.2.2 Polarization mechanism of dielectric
1.2.3 Dielectric constant
1.2.4 Dielectric loss
1.2.5 Dielectric relaxation theory
1.3 Humidity Sensing
1.3.1 Humidity definition
1.3.2 The significance of humidity detection
1.3.3 Humidity parameters and definitions
1.3.4 Humidity sensor classification
1.4 Thesis content and significance
Chapter 2 Samples preparation and characterizations
2.1 Experimental materials
2.2 Synthesis methods of powder
2.3 Samples preparation
2.3.1 Preparation of powders
2.3.2 Preparation and treatment of ceramic samples
2.4 Characterization of the samples
2.4.1 XRD phase analysis
2.4.2 Measurement of dielectric constant and dielectric loss
2.4.3 Measurement of dielectric parameter temperature spectrum
2.4.4 Measurement of dielectric parameter frequency spectrum
2.4.5 Humidity sensitive characteristic test
2.5 The instruments used in the experiment
Chapter 3 Dielectric properties of BaZr_(0.1)Ce_(0.7)Y_(0.2)O_(3-δ) and BaZr_(0.4)Ce_(0.4)Y_(0.2)O_(3-δ)ceramics
3.1 Introduction
3.2 Experimental results and discussion
3.2.1 Temperature spectrum analysis
3.2.2 Frequency spectrum analysis
3.2.3 Annealing treatment
3.2.4 Conductance behavior analysis
3.3 Summary
Chapter 4 Humidity sensitivity of BaZr_(0.4)Ce_(0.4)Y_(0.2)O_(3-δ) ceramics
4.1 Introduction
4.2 Experimental results and discussion
4.2.1 Structural Characterization (XRD)
4.2.2 Response time
4.2.3 Humidity hysteresis
4.2.4 Annealing treatment
4.2.5 Impedance spectroscopy
4.2.6 DC bias test
4.3 Summary
Chapter 5 Conclusions
References
Acknowledgements
Publications
【参考文献】：
期刊论文
[1]智能传感器技术的研究进展及应用展望[J]. 尤政. 科技导报. 2016(17)
[2]湿度、露点和干燥度[J]. 许建照,赵莉,丰爱国. 电子机械工程. 2009(05)
[3]Nb掺杂Bi4Ti3O12陶瓷的微结构与介电性能研究[J]. 黄小丹,王华,任明放,许积文,杨玲. 材料导报. 2009(04)
[4]微波介质陶瓷[J]. 郑兴华,梁炳亮. 江苏陶瓷. 2005(02)
[5]微波介质陶瓷材料的研究进展[J]. 宋英,王福平,周玉. 材料科学与工艺. 1998(02)
硕士论文
[1]基于高分子纳米复合物的湿度传感器及其湿敏性能研究[D]. 邓超.浙江大学 2012
[2]LCMO巨磁阻材料定向诱导生长和结构特性分析—以及LCMO场效应晶体管的制备[D]. 崔志敏.东南大学 2006
本文编号：3685956
【文章页数】：56 页
【学位级别】：硕士
【文章目录】：
摘要
Abstract
Chapter 1 Introduction
1.1 Background
1.2 Dielectric
1.2.1 Dielectric concept
1.2.2 Polarization mechanism of dielectric
1.2.3 Dielectric constant
1.2.4 Dielectric loss
1.2.5 Dielectric relaxation theory
1.3 Humidity Sensing
1.3.1 Humidity definition
1.3.2 The significance of humidity detection
1.3.3 Humidity parameters and definitions
1.3.4 Humidity sensor classification
1.4 Thesis content and significance
Chapter 2 Samples preparation and characterizations
2.1 Experimental materials
2.2 Synthesis methods of powder
2.3 Samples preparation
2.3.1 Preparation of powders
2.3.2 Preparation and treatment of ceramic samples
2.4 Characterization of the samples
2.4.1 XRD phase analysis
2.4.2 Measurement of dielectric constant and dielectric loss
2.4.3 Measurement of dielectric parameter temperature spectrum
2.4.4 Measurement of dielectric parameter frequency spectrum
2.4.5 Humidity sensitive characteristic test
2.5 The instruments used in the experiment
Chapter 3 Dielectric properties of BaZr_(0.1)Ce_(0.7)Y_(0.2)O_(3-δ) and BaZr_(0.4)Ce_(0.4)Y_(0.2)O_(3-δ)ceramics
3.1 Introduction
3.2 Experimental results and discussion
3.2.1 Temperature spectrum analysis
3.2.2 Frequency spectrum analysis
3.2.3 Annealing treatment
3.2.4 Conductance behavior analysis
3.3 Summary
Chapter 4 Humidity sensitivity of BaZr_(0.4)Ce_(0.4)Y_(0.2)O_(3-δ) ceramics
4.1 Introduction
4.2 Experimental results and discussion
4.2.1 Structural Characterization (XRD)
4.2.2 Response time
4.2.3 Humidity hysteresis
4.2.4 Annealing treatment
4.2.5 Impedance spectroscopy
4.2.6 DC bias test
4.3 Summary
Chapter 5 Conclusions
References
Acknowledgements
Publications
【参考文献】：
期刊论文
[1]智能传感器技术的研究进展及应用展望[J]. 尤政. 科技导报. 2016(17)
[2]湿度、露点和干燥度[J]. 许建照,赵莉,丰爱国. 电子机械工程. 2009(05)
[3]Nb掺杂Bi4Ti3O12陶瓷的微结构与介电性能研究[J]. 黄小丹,王华,任明放,许积文,杨玲. 材料导报. 2009(04)
[4]微波介质陶瓷[J]. 郑兴华,梁炳亮. 江苏陶瓷. 2005(02)
[5]微波介质陶瓷材料的研究进展[J]. 宋英,王福平,周玉. 材料科学与工艺. 1998(02)
硕士论文
[1]基于高分子纳米复合物的湿度传感器及其湿敏性能研究[D]. 邓超.浙江大学 2012
[2]LCMO巨磁阻材料定向诱导生长和结构特性分析—以及LCMO场效应晶体管的制备[D]. 崔志敏.东南大学 2006
本文编号：3685956
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