Development of High Efficient Pyroelectric Generator

高效热释电发电机的研制

• 批准号: 24656377
• 负责人: KAJITANI Tsuyoshi
• 金额: $ 2.58万
• 依托单位: Tohoku University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Challenging Exploratory Research
• 财政年份: 2012
• 资助国家: 日本
• 起止时间: 2012-04-01 至 2014-03-31
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-24656377/
• 关键词: 廃熱利用; 電子・電気材料; 焦電発電; 強誘電体; キュリー温度; BTO

This project was aimed to develop practically usable pyroelectric device materials for the low temperature waist heat harvesting. Research focus was to develop modified BTO which has low Curie temperature, at about 130 deg., and temperature dependent polarization, P(T). The first principle band calculation was repeated to find suitable combination of ionic arrangement and crystal structure suitable for the purpose. Following itemized knowledges were obtained. 1.Partial substitution of Y or Ca for Ba caused appreciable increase in Curie temperature. for 5 deg. was due to the substitution of Y or Ca. 2.The polarization, P, also increased by the partial substitution. 3. Significant increase in the grain sizes and pyroelectric coefficient were recorded for the 30% Ca sample. 4. The d-bands extended from Ti, Zr or Nb ion situated just below Fermi level have very close relationship between the pyroelectric characteristics of above three materials.

该项目旨在开发实用的热释电装置材料，用于低温腰部热量收集。研究重点是开发具有低居里温度（约 130 度）和温度依赖性极化 P(T) 的改性 BTO。重复第一原理能带计算，以找到适合该目的的离子排列和晶体结构的合适组合。获得以下逐项知识。 1.Y或Ca部分取代Ba引起居里温度明显升高。 5度。是由于Y或Ca的取代造成的。 2.极化P也因部分取代而增加。 3. 30% Ca 样品的晶粒尺寸和热电系数显着增加。 4、位于费米能级以下的Ti、Zr或Nb离子延伸的d带与上述三种材料的热释电特性之间具有非常密切的关系。

项目成果

Cation Distribution Dependence on Thermoelectric Properties of Doped Spinel M_<0.6>Fe_<2.4>O_4

掺杂尖晶石M_<0.6>Fe_<2.4>O_4热电性能的阳离子分布依赖性

• 发表时间: 2012
• 期刊: Mater. Trans
• 作者: T.Nozaki;K.Hayashi;Y.Miyazaki;T.Kajitani
• 通讯作者: T.Kajitani

Ultrasonic Heating of Poly(ethylene terephthalate), Polypropylene, High Density Polyethylene, and Low Density Polyethylene Films

聚对苯二甲酸乙二醇酯、聚丙烯、高密度聚乙烯和低密度聚乙烯薄膜的超声波加热

• 发表时间: 2012
• 期刊: Appl.Phys.Express
• 作者: Satoshi Murao;Takehiro Hosokawa;Tsuyoshi Kajitani
• 通讯作者: Tsuyoshi Kajitani

Structural and pyroelectric properties of Ca-doped BaTiO3

Ca掺杂BaTiO3的结构和热释电性能

• 发表时间: 2013
• 作者: K.Hayashi;E.Aikawa;T.Ueno;T.Kajitani;Y.Miyazaki
• 通讯作者: Y.Miyazaki

焦電効果に対するd 電子の役割

d 电子对热释电效应的作用

• 发表时间: 2013
• 作者: 梶谷剛;相川瑛介;林慶;藤原巧
• 通讯作者: 藤原巧

大学院の結晶構造解析（１）

研究生院晶体结构分析（1）

• 发表时间: 2013
• 期刊: 金属
• 作者: T.Kajitani;M.Kubouchi;S.Kikuchi;K.Hayashi;T.Ueno;Y.Miyazaki and K.Yubuta;梶谷 剛
• 通讯作者: 梶谷 剛