{"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}
引用次数: 3
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.
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