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Title: Spark plasma sintering of core-shell structured (Mg,Zn)O wrapped Ba 1-xSrxTiO3 nanopowder
Authors: Chen, WP
Tian, HY
Qi, JQ
Wang, Y 
Shen, ZJ
Ruan, XF
Chan, HLW 
Keywords: Composites
Core-shell structure
Spark plasma sintering
Issue Date: 2007
Publisher: Scientific.Net
Source: Key engineering materials, 2007, v. 334-335 II, p. 1037-1040 How to cite?
Journal: Key engineering materials 
Abstract: Ba0.75Sr0.25TiO3-Mg0.9Zn 0.1O (BST-MZO) composite ceramics were prepared by sintering core-shell structured nano-powders at 1200°C via a spark plasma sintering (SPS) process. X-ray diffraction measurements revealed the coexistence of two phases (BST and MZO). Scanning electron microscope analysis indicated that the ceramic had a pore-free microstructure and an average grain size of ∼400 run. The dielectric constant and loss tangent of the ceramic were 607 and 1.2×10-4 at 10 kHz at room temperature, respectively. A good dielectric tunability was observed in the ceramic. At room temperature, the tunability and the figure of merit of the ceramic were 65.78% and 300 (under a dc bias of 19.27 kV/cm), suggesting that the ceramic is a good candidate for tunable microwave devices.
ISSN: 1013-9826
EISSN: 1662-9795
Appears in Collections:Conference Paper

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