{"title":"晶粒排列(Ca,Bi)/sub 3/Co/sub 4/O/sub 9/陶瓷的制备及其热电性能","authors":"I. Matsubara, R. Funahashi, T. Takeuchi, Y. Zhou","doi":"10.1109/ICT.2001.979852","DOIUrl":null,"url":null,"abstract":"Effects of sintering process on the thermoelectric properties of (Ca,Bi)/sub 3/Co/sub 4/O/sub 9/ ceramics have been investigated. We have prepared (Ca, Bi)/sub 3/Co/sub 4/O/sub 9/ bulk materials using the methods of spark plasma sintering (SPS), hot pressing (HP), and a combination of them. Power factors of the SPS and HP samples at 700/spl deg/C are 4.2/spl times/10/sup -4/ Wm/sup -1/ K/sup -2/ and 4.5/spl times/10/sup -4/ Wm/sup -1/ K/sup -2/, respectively. The combination of SPS and HP enables bulk ceramics (SPS-HP) to be high density, grain alignment, and low resistivity without any degradation of the thermoelectric power. The power factor and figure of merit of the SPS-HP sample attain to 5.7/spl times/10/sup -4/ Wm/sup -1/ K/sup -2/ and ZT=0.29 at 700/spl deg/C, respectively.","PeriodicalId":203601,"journal":{"name":"Proceedings ICT2001. 20 International Conference on Thermoelectrics (Cat. No.01TH8589)","volume":"44 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2001-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"5","resultStr":"{\"title\":\"Preparation and thermoelectric properties of grain aligned (Ca,Bi)/sub 3/Co/sub 4/O/sub 9/ ceramics\",\"authors\":\"I. Matsubara, R. Funahashi, T. Takeuchi, Y. Zhou\",\"doi\":\"10.1109/ICT.2001.979852\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Effects of sintering process on the thermoelectric properties of (Ca,Bi)/sub 3/Co/sub 4/O/sub 9/ ceramics have been investigated. We have prepared (Ca, Bi)/sub 3/Co/sub 4/O/sub 9/ bulk materials using the methods of spark plasma sintering (SPS), hot pressing (HP), and a combination of them. Power factors of the SPS and HP samples at 700/spl deg/C are 4.2/spl times/10/sup -4/ Wm/sup -1/ K/sup -2/ and 4.5/spl times/10/sup -4/ Wm/sup -1/ K/sup -2/, respectively. The combination of SPS and HP enables bulk ceramics (SPS-HP) to be high density, grain alignment, and low resistivity without any degradation of the thermoelectric power. The power factor and figure of merit of the SPS-HP sample attain to 5.7/spl times/10/sup -4/ Wm/sup -1/ K/sup -2/ and ZT=0.29 at 700/spl deg/C, respectively.\",\"PeriodicalId\":203601,\"journal\":{\"name\":\"Proceedings ICT2001. 20 International Conference on Thermoelectrics (Cat. No.01TH8589)\",\"volume\":\"44 1\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2001-06-08\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"5\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Proceedings ICT2001. 20 International Conference on Thermoelectrics (Cat. No.01TH8589)\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1109/ICT.2001.979852\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Proceedings ICT2001. 20 International Conference on Thermoelectrics (Cat. No.01TH8589)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/ICT.2001.979852","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Preparation and thermoelectric properties of grain aligned (Ca,Bi)/sub 3/Co/sub 4/O/sub 9/ ceramics
Effects of sintering process on the thermoelectric properties of (Ca,Bi)/sub 3/Co/sub 4/O/sub 9/ ceramics have been investigated. We have prepared (Ca, Bi)/sub 3/Co/sub 4/O/sub 9/ bulk materials using the methods of spark plasma sintering (SPS), hot pressing (HP), and a combination of them. Power factors of the SPS and HP samples at 700/spl deg/C are 4.2/spl times/10/sup -4/ Wm/sup -1/ K/sup -2/ and 4.5/spl times/10/sup -4/ Wm/sup -1/ K/sup -2/, respectively. The combination of SPS and HP enables bulk ceramics (SPS-HP) to be high density, grain alignment, and low resistivity without any degradation of the thermoelectric power. The power factor and figure of merit of the SPS-HP sample attain to 5.7/spl times/10/sup -4/ Wm/sup -1/ K/sup -2/ and ZT=0.29 at 700/spl deg/C, respectively.
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