Densification of Bi0.5Na0.5ZrO3 ceramic using liquid-phase sintering method

作者：Jaiban Panupong; Jiansirisomboon Sukanda; Watcharapasorn Anucha^*

来源：ScienceAsia, 2011, 37(3): 256-261.

DOI：10.2306/scienceasia1513-1874.2011.37.256

• lead-free material
• bismuth sodium zirconate
• sintering aid
• microstructure

Lead-free bismuth sodium zirconate (BNZ) ceramics with formula Na0.5Bi0.5ZrO3/xBi(2)O(3) with x = 0, 2, 3, 4, and 6 wt% were prepared by liquid-phase sintering method. The specimens were sintered at 850 and 900 degrees C. Phase identification was investigated using X-ray diffraction technique. BNZ/4 wt% Bi2O3 and BNZ/6 wt% Bi2O3 ceramics sintered at 900 degrees C showed impurity phase of Bi7.38Zr0.62O12.31 compound due to excess additive reacted with zirconium in system. Scanning electron microscopy and energy-dispersive X-ray spectroscopy were employed to study microstructure and measure chemical composition of ceramics, respectively. The results revealed creation of bismuth oxide liquid phase at BNZ grain boundaries inhibited grain growth and decreased pore size. This caused the relative densities of the modified samples to increase.

• 出版日期2011-9