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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


Pure and Mn-doped barium hafnate titanate ceramics (BaHf0.1MnxTi0.9xO3, 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.

* 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