Study on the Effects of Thermal Etching Processes for BSNT Ceramics on SEM Micrograph

The tungsten bronze type Ba6–3 (Sm1–yNdy)8+2 Ti18O54(x=2/3, y=0.8)(BSNT) and BSNT+0.5wt.%Bi2O3 x x microwave dielectric ceramics were prepared by a routine solid state reaction process. The effects of different thermal etching processes on the Scanning Electron Micrograph(SEM) and the characteristics and forming reasons of all kinds of microstructures were studied. The results show that SEM micrographs are best after the samples without and with Bi2O3 additive were thermally etched at lower 80℃ and 105℃ than their sintering temperatures, respectively.