{"title":"Ba3RE3Ti5Ta5O30陶瓷的制备与表征","authors":"P. Rao, Swapankumar Ghosh, P. Koshy","doi":"10.1179/096797803225009238","DOIUrl":null,"url":null,"abstract":"Abstract Polycrystalline samples of Ba3RE3Ti5Ta5O30 (RE = Nd, Sm) were prepared by conventional solid state powder processing. The calcined compounds were pelletised and sintered at 1320, 1340, and 1360°C for 4 h. XRD structural and SEM microstructural characterisation showed the formation of single phase material with tetragonal crystal structure. Detailed studies of dielectric properties (ϵ, tanδ) as a function of frequency (100 Hz to 13 MHz) showed that the compounds had a dielectric constant around 120 and a loss factor of 6 × 10 - 3 at 1 MHz. At 1 MHz, the Nd and Sm compounds had dielectric constants of 123 and 117 respectively.","PeriodicalId":350675,"journal":{"name":"British Ceramic Transactions","volume":"21 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2003-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"3","resultStr":"{\"title\":\"Preparation and characterisation of Ba3RE3Ti5Ta5O30 ceramics\",\"authors\":\"P. Rao, Swapankumar Ghosh, P. Koshy\",\"doi\":\"10.1179/096797803225009238\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Abstract Polycrystalline samples of Ba3RE3Ti5Ta5O30 (RE = Nd, Sm) were prepared by conventional solid state powder processing. The calcined compounds were pelletised and sintered at 1320, 1340, and 1360°C for 4 h. XRD structural and SEM microstructural characterisation showed the formation of single phase material with tetragonal crystal structure. Detailed studies of dielectric properties (ϵ, tanδ) as a function of frequency (100 Hz to 13 MHz) showed that the compounds had a dielectric constant around 120 and a loss factor of 6 × 10 - 3 at 1 MHz. At 1 MHz, the Nd and Sm compounds had dielectric constants of 123 and 117 respectively.\",\"PeriodicalId\":350675,\"journal\":{\"name\":\"British Ceramic Transactions\",\"volume\":\"21 1\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2003-02-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"3\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"British Ceramic Transactions\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1179/096797803225009238\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"British Ceramic Transactions","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1179/096797803225009238","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Preparation and characterisation of Ba3RE3Ti5Ta5O30 ceramics
Abstract Polycrystalline samples of Ba3RE3Ti5Ta5O30 (RE = Nd, Sm) were prepared by conventional solid state powder processing. The calcined compounds were pelletised and sintered at 1320, 1340, and 1360°C for 4 h. XRD structural and SEM microstructural characterisation showed the formation of single phase material with tetragonal crystal structure. Detailed studies of dielectric properties (ϵ, tanδ) as a function of frequency (100 Hz to 13 MHz) showed that the compounds had a dielectric constant around 120 and a loss factor of 6 × 10 - 3 at 1 MHz. At 1 MHz, the Nd and Sm compounds had dielectric constants of 123 and 117 respectively.
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