Effects of Mn and Sr Doping on the Electrical Properties of Lead-Free 0.92BCZT-0.08BZT Ceramics

作者：Parjansri Piewpan; Intatha Uraiwan; Eitssayeam Sukum^*; Pengpat Kamonpan; Rujijanagul Gobwute; Tunkasiri Tawee

来源：Integrated Ferroelectrics, 2012, 139(1): 75-82.

DOI：10.1080/10584587.2012.737225

• Lead Free Ceramics
• Phase Formations
• Solid State Reaction
• Dielectric Properties
• Perovskite Structure

The effects of Mn and Sr doping on the electrical properties of lead-free 0.92[(Ba0.85Ca0.15Zr0.1Ti0.9)O3]-0.08[(BiZn0.5Ti0.5)O3] ceramics have been studied. A-site and B-site doping with 0.000.05mol% of SrCO3 and 00.25mol% of MnO2 was performed. The ceramics were prepared using the solid state reaction technique. The powder was ball-milled for 24h, then calcined at 1,000oC for 4h and sintering at 1,300oC for 2h. Phase formation and microstructure of ceramics were examined using an x-ray diffractometer (XRD) and scanning electron microscopy (SEM). All samples have a single phase of perovskite structure. Grain size and density value were in the range of 3.434.07m and 5.785.83g/cm3, respectively. The electrical properties of the ceramics were investigated as a function of Mn and Sr doping. It was found that the dielectric constant, activation energy and ac conductivity change with the dopant. Moreover, Mn and Sr doping lead to a decrease of dielectric loss, lower than 0.003 for all samples (at 1kHz).

• 出版日期2012