Sintering Effects on the Physical Properties of Bismuth Sodium Titanate Ceramics Doped Tantalum Pentoxide

Abstract

This research studies the preparation of bismuth sodium titanate doped tantalum ceramics pentoxide (Bi0.5Na0.5Ti1-xTaxO3, BNT/xTa2O5). BNT/xTa2O5 powders were prepared using x = 0.015 and 0.030 at%. Starting, BNT/xTa2O5 nanopowders were prepared using a high-energy ball milling technique. The BNT/xTa2O5nanopowders were sintered at 1,050 - 1,125 °C. Preliminary study of the physical properties of BNT/xTa2O5ceramics showed that the linear shrinkage of the ceramics sintered at 1,050 - 1,125 °C was decreased with the amount of Ta2O5 at 0.015 to 0.030. To study of the relative density of the ceramics was found to be maximum at x= 0.015 after sintered at 1,100 °C. The relative density value is 96%. Moreover, it was found that the relative density was decreased with the amount of Ta2O5 at 0.015 to 0.030.The microstructure of BNT/xTa2O5 ceramics at 0.015 and 0.030 after sintering at 1,100 °C showed that the average grain size was decreased when increasing the amount of Ta2O5.