Precisely-controlled synthesis of thermoelectric oxides via chemical solution process and enhancement of their performance by microstructural regulation

通过化学溶液法精确控制热电氧化物的合成并通过微观结构调控增强其性能

• 批准号: 20560670
• 负责人: ITO Mikio
• 金额: $ 2.91万
• 依托单位: Osaka University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2008
• 资助国家: 日本
• 起止时间: 2008 至 2010
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-20560670/
• 关键词: 熱電変換材料; 電気伝導性酸化物; 錯体重合法; 電気抵抗率; 出力因子; パルス通電焼結; 粉末合成; 緻密化温度; 酸素欠損; 低温迅速焼結; ホットプレス; 常圧焼結; 元素置換; ゼーベック係数; クエン酸錯体法; 性能指数

The thermoelectric oxides and their composites were synthesized and their microstructures were controlled by using the chemical solution process, resulting in enhancement of thermoelectric performance and establishment of synthesis process at lower temperature and for shorter period of operating time. Especially in the case of the n-type SrTiO_3, mixing with TiB_2 was found to be quite effective for enhancing thermoelectric performance due to reduction in electrical resistivity and decreasing temperature of sintering by about 200K. As a result, the total synthesis process from powder preparation to final sintering at lower temperature and for shorter period of operating time was established by using the chemical solution process.

采用化学溶液法合成了热电氧化物及其复合材料，并对其微观结构进行了控制，从而在较低的温度和较短的操作时间下提高了热电性能，建立了合成工艺。尤其对于n型SrTiO_3，掺入TiB_2能有效降低材料的电阻率，降低烧结温度，从而有效地提高材料的热电性能。采用化学溶液法建立了从粉末制备到最终烧结的低温、短时间的全合成工艺。

项目成果

パルス通電焼結により合成したSrTiO_3+TiB_2複合体の緻密化挙動

脉冲电流烧结合成SrTiO_3+TiB_2复合材料的致密化行为

• 发表时间: 2010
• 作者: 長谷川直輝;井藤幹夫;中野貴由
• 通讯作者: 中野貴由

Transport properties of thermoelectric SrTiO_3 synthesized by polymerized complex method and spark plasma sintering

聚合络合法和放电等离子烧结合成热电SrTiO_3的输运性能

• 发表时间: 2010
• 期刊: Journal of Physics : Conference Series Vol.232
• 作者: Mikio Ito;Naoto Ohira
• 通讯作者: Naoto Ohira

TiB_2を添加したSrTiO_3粉末の焼結挙動

添加TiB_2的SrTiO_3粉末的烧结行为

• 发表时间: 2010
• 作者: 井藤幹夫;柳楽知也;勝山茂;井藤幹夫;井藤幹夫;井藤幹夫
• 通讯作者: 井藤幹夫

Enhancement of thermoelectric performance of NaxCo2O4 with Ag dispersion by precipitation from Ag+ aqueous solution

• DOI: 10.1007/s10971-010-2261-2
• 发表时间: 2010-06
• 期刊: Journal of Sol-Gel Science and Technology
• 影响因子: 2.5
• 作者: Mikio Ito;Junji Sumiyoshi

SPSを利用したSrTiO_3系熱電変換材料の低温迅速合成

SPS低温快速合成SrTiO_3基热电转换材料

• 发表时间: 2009
• 作者: 長谷川直輝;井藤幹夫;中野貴由;井藤幹夫
• 通讯作者: 井藤幹夫