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- W2018339128 abstract "Microwave sintering process was successfully applied to synthesize the (Sr 0.2 Ba 0.8 )TiO 3 , SBT, materials with good PTCR properties. The SBT samples achieved a density as high as 96% T.D., possessing uniform microstructure (∼3.4 w m grain size) and large PTCR coefficient ( f =log(R max /R min )=5.9), when sintered at 1200°C for 20 min. However, cooling process needs to be stringently controlled in order to optimize the PTCR characteristics of the materials. Slowest cooling (2°C/min) from sintering temperature (1200°C) leads to the best PTCR properties for the SBT materials. A 2-step cooling experiment reveals that the most probable factor, by which the fast cooling degrades the PTCR behavior of the SBT materials, is the formation of amorphous layer in grain boundary region. The Schottky barrier is thus deteriorated." @default.
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- W2018339128 date "2002-01-01" @default.
- W2018339128 modified "2023-09-24" @default.
- W2018339128 title "Positive Temperature Coefficient Properties of (Sr 0.2 Ba 0.8 )TiO 3 Prepared by Microwave Sintering Technique" @default.
- W2018339128 doi "https://doi.org/10.1080/00150190211206" @default.
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