Study on preparation of La0.85Bi0.15Al1-xGaxO3 amorphous spheres fabricated by containerless solidification process and dielectric properties

Abstract:

In this paper, a series of La0.85Bi0.15Al1-xGaxO3powders with the composition of x from 0 to 1 have been firstly prepared by sol-gel method. Then as-prepared powders were pressed into 10 mm diameter discs of 1-2 mm thickness, part of one disc rapidly solidified to form homogeneous amorphous sphere by means of aerodynamic levitator method, which involved a containerless solidification process. The prepared La0.85Bi0.15Al1-xGaxO3 amorphous samples are spherical shape and transparent property with wide-banded transmittance from 1000nm to 3000nm, the apparent transmittance had a maximum of about 81.7% for x=0. The dielectric constant is higher 19 and dielectric loss is lower 0.006 for all the fabricated samples from 10kHz to 1MHz. The nature of La0.85Bi0.15Al1-xGaxO3 amorphous spheres were identified by XRD and Raman spectrum.