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Effect of Mn doping on the microstructure and dielectric properties of BaHf0.1Ti0.9O3 ceramics

  • Chunlin Fu , Jingnan Liang , Wei Cai , Gang Chen and Xiaoling Deng
Published/Copyright: November 30, 2013
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International Journal of Materials Research
From the journal International Journal of Materials Research Volume 104 Issue 12

Abstract

Pure and Mn-doped barium hafnate titanate ceramics (BaHf0.1MnxTi0.9–xO3, where x = 0, 0.02, 0.05, 0.08, and 0.1) are prepared by means of a sol–gel method. The microstructures, dielectric properties and ferroelectric properties of the ceramics are investigated. X-ray diffraction patterns indicate that Mn4+ ions enter the unit cell to maintain the perovskite structure of solid solution. Consequently, the tetragonality gradually decreases with increased Mn content. The grains of Mn-doped BaHf0.1Ti0.9O3 ceramics become uniform and almost spherical. The diffuseness constant decreases from 1.89 to 1.48 with increased Mn content from 0 at.% to 5 at.%. Hysteresis loops can be observed in all samples from 30 °C to 90 °C, which may be due to the relaxor ferroelectric property of these ceramics.

Keywords: Barium hafnate titanate; Ceramics; Ferroelectric; Doping
* Correspondence address, Prof. Chunlin Fu, Huxi University Town, School of Metallurgical and Materials Engineering, Chongqing University of Science and Technology, Chongqing 401331, PR China, Tel.: +86 23 6502 3479, Fax: +86 23 6502 3706, E-mail:

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Received: 2012-12-12
Accepted: 2013-7-10
Published Online: 2013-11-30
Published in Print: 2013-12-12

© 2013, Carl Hanser Verlag, München

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https://doi.org/10.3139/146.110980
Keywords for this article
Barium hafnate titanate; Ceramics; Ferroelectric; Doping

Articles in the same Issue

  1. Contents
  2. Contents
  3. Original Contributions
  4. Critical sizes for coherent to semicoherent transition in precipitates
  5. Thixoformability evaluation of AA2011 and AA2014 alloys
  6. Joint strength of friction stir welded AISI 304 austenitic stainless steels
  7. Optimization of process parameters in explosive cladding of titanium/stainless steel 304L plates
  8. Optimization of the hot rolling parameters for evaluation of the formability of Nb-microalloyed steel sheet by using the Taguchi method
  9. XPS measurements of LDX 2101 duplex steel surface after magnetoelectropolishing
  10. Phase equilibria of the Al-Cr-Pr ternary system at 773 K
  11. Processing and mechanical characterisation of monolithic silicon carbide ceramic consolidated by spark plasma sintering (SPS)
  12. Effect of Mn doping on the microstructure and dielectric properties of BaHf0.1Ti0.9O3 ceramics
  13. Nano hydroxyapatite–polysulfone coating on Ti-6Al-4V substrate by electrospinning
  14. Photocatalytic and self-cleaning properties of SiO2/TiO2/SiO2 nanostructured thin film
  15. Formation mechanism of manganese vanadate microtubes and their electrochemical sensing properties
  16. Modification of the luminescent properties of ZnS nanoparticles by the adsorbed species
  17. DGM News
  18. DGM News
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