Industrialization of New PTCR Materials Based on a Ceramics Matrix with a Dispersion of Bi Metal Particles as Ceramic Heaters

基于双金属颗粒分散陶瓷基体的新型PTCR材料作为陶瓷加热器的产业化

• 批准号: 09555203
• 负责人: OKADA Masuo
• 金额: $ 8.45万
• 依托单位: Tohoku University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 1997
• 资助国家: 日本
• 起止时间: 1997 至 1999
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-09555203/
• 关键词: positive temperature coefficient of resistivity; Bi metal; Ceramics Composites; Ceramic Heater; PTCR thermistor; Hot-Pressing; Bi金属の融点; BiSn合金; BiSb合金; Bi; SrBi_4Ti_4O_<15>; BaTiO_3; TiO_2; Al_2O_3

A new type of PTCR materials based on a Bi metal/Ceramics composites has been developed. In this study the possibility for industrialization of the material has been investigated.The composites based on a ceramics matrix with a dispersion of Bi metal particles showed PTCR properties at the melting point of Bi metal of about 270℃. The melting points of temperature were controlled by varying the melting points of Bi alloy particles.The ceramics matrix such as AlィイD22ィエD2OィイD23ィエD2, SrBiィイD24ィエD2TiィイD24ィエD2OィイD215ィエD2 and TiOィイD22ィエD2 have an effect on magnitude of the PTCR properties and a room-temperature resistivity.It was found that the sample 0.76Bi-0.24SrBiィイD24ィエD2(TiィイD20.95ィエD2NbィイD20.05ィエD2)ィイD24ィエD2OィイD215ィエD2 sintered by optimum condition (1125℃, 2h) and by decreasing the particle size of Bi metal to a few micron showed the PTCR property of about 5 orders of magnitude.The relative density of hot-pressed composites with using fine Bi metal reached more than 99% and its resistivity of nearly 10ィイD1-1ィエD1Ωcm at room-temperature unchanged after the cyclic measurement. In addition, the magnitudes of PTCR effect reached 7 order of magnitude, and resistivity-temperature curve also remained unchanged even after 3rd measurements.

研制了一种新型的铋金属/陶瓷复合PTCR材料。研究了该材料工业化的可能性，在Bi金属熔点为270℃时，以陶瓷为基体，分散有Bi金属颗粒的复合材料显示出PTCR性能。通过改变Bi合金颗粒的熔点来控制温度的熔点，制备了Al_（22）Bi_（23）Al_（23）Bi_（23）SrBi掺杂D24纳米D2 Ti掺杂D24纳米D2 O掺杂D215纳米D2和TiO掺杂D22纳米D2对PTCR性能和室温电阻率的大小有影响。0.24SrBi铌酸锂D24铌酸锂D2优化烧结条件下的（Ti_（60）D_20.95 Nb_（60）D_20.05 Nb_（60）D_2）Ti_（60）D_24 Nb_（60）D_215 Nb_（60）D_2（1125℃，2 h），并将Bi金属颗粒尺寸减小到几微米，可获得约5个数量级的PTCR性能，采用细Bi金属热压复合材料的相对密度达到99%以上室温电阻率约为10 Ω·cm ~（-1）Ω·cm ~（-1）Ω·cm ~（-1）。此外，PTCR效应的大小达到7个数量级，并且即使在第三次测量后，磁导率-温度曲线也保持不变。

项目成果

T.Sawaguchi: "Microstructures and PTCR Properties of Bismuth Metal/Strontium-Bismuth-Titanate Ceramic Composites"Materials Transactions,JIM. Vol.40・No.5. 353-358 (1999)

T. Sawaguchi：“金属铋/钛酸锶铋陶瓷复合材料的微观结构和 PTCR 性能”，《材料学报》，JIM 第 40 卷·第 353-358 期（1999 年）。

加納貴志: "ホットプレス法により作製したBi金属/セラミックス複合体のPTCR特性"粉体および粉末治金. 第46巻第7号. 752-756 (1999)

Takashi Kano：“热压法制备的 Bi 金属/陶瓷复合材料的 PTCR 性能”《粉末与粉末冶金》，第 46 卷，第 752-756 期（1999 年）。

T.Sawaguchi: "New PTC Materials Based on Bi Metal Ceramics Composites"Materials Transactions, JIM. Vol.38,No.4. 353-358 (1997)

T.Sawaguchi：“基于双金属陶瓷复合材料的新型 PTC 材料”Materials Transactions，JIM。

T. Kanou: "PTCR Properties of Bi Metal/Ceramic Composites Fabricated by Hot-Pressing"J. Japan Soc. Powder and Powder Metallurgy. Vol. 46, No. 7. 752-756 (1999)

T. Kanou：“热压制备双金属/陶瓷复合材料的PTCR性能”J。

T.Sawaguchi: "Microstructures and PTCR Properties of Bismuth Metal/Strontium-Bismuth-Titanate Ceramic Composites"Materials Transactions, JIM. Vol.40・No.5. 404-407 (1999)

T. Sawaguchi：“金属铋/钛酸锶铋陶瓷复合材料的微观结构和 PTCR 性能”，《材料学报》，JIM 第 40 卷·第 404-407 期（1999 年）。