Ukrainian Journal of Physical Optics 

Supplement 3, 2012
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Effect of MnO2 doping on the dielectric properties of barium titanate ceramics

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Sitko D., Bąk W., Garbarz-Glos B., Antonova M. and Jankowska-Sumara I.

Abstract. The effect of MnO2 doping on the structure, microstructure and dielectric proper-ties of BaTiO3 has been studied. For this purpose MnO2-doped BaTiO3 ceramics have been prepared using a conventional ceramic method. The energy-dispersive X-ray spectroscopy investigations have revealed that the samples BaTiO3 + x wt. % MnO2 (x = 0.01; 0.1) are perfectly sintered. Our studies have shown that all the electric parameters under investigation depend on the frequency of electric field and the amount of manganese substitution. In order to understand better the character of phase transition in BaTiO3 + x wt. % MnO2 (x = 0.01; 0.1), we have also studied the thermal behaviour of these compounds. 

Keywords: BaTiO3 doped with Mn, DSC, dielectric spectroscopy

UDC: 536, 537
PACS: 77.80.B-, 77.80.bg
Ukr. J. Phys. Opt. 13, Suppl.3, S34-S43 
doi: 10.3116/16091833/13/1/S34/2012
Received: 09.09.2012

Анотація. У роботі досліджено вплив легування MnO2 на структуру, мікроструктуру і діелектричні властивості BaTiO3. Для цього було підготовлено кераміку BaTiO3, леговану MnO2, згідно із загальноприйнятим методом. За методом енергодисперсійної X-спектроскопії виявлено різне спікання зразків зі складом BaTiO3+ x ваг. % MnO2 (x = 0,01; 0,1). Встановлено, що електричні параметри кераміки залежать від частоти електричного поля і концентрації заміщення. Для кращого розуміння характеру фазового переходу в сис-темах BaTiO3 + x ваг. % MnO2 (x = 0,01; 0,1) було досліджено температурну поведінку діелектричних характеристик. 
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