Preparation of Bi2O3 -B2O3 -ZnO -BaO -SiO2 glass powders with spherical shape by spray pyrolysis

• Published in: Journal of alloys and compounds Vol. 437; no. 1-2; pp. 215 - 219
• Main Authors: Hong, Seung Kwon, Koo, Hye Young, Jung, Dae Soo, Suh, Il Soon, Kang, Yun Chan
• Format: Journal Article
• Language: English
• Published: Lausanne Elsevier 28.06.2007
• Subjects: Condensed matter: structure, mechanical and thermal properties; Equations of state, phase equilibria, and phase transitions; Exact sciences and technology; Glass transitions; Physics; Specific phase transitions; Transparency; Spherical shape; Dielectric materials; Spray coatings; Gas-solid reaction; Glass; Droplets; Amorphous materials; Silicates; Chemical synthesis; Surface structure; Drying
• ISSN: 0925-8388; 1873-4669
• DOI: 10.1016/j.jallcom.2006.07.072

Bi2O3-B2O3-ZnO-BaO-SiO2 glass powders were firstly prepared by spray pyrolysis. Bi2O3-B2O3-ZnO-BaO-SiO2 glass powders prepared by spray pyrolysis had complete spherical shape and micron size at the optimum preparation temperatures. One micron-sized glass powder was formed from one droplet by drying, decomposition and melting processes. The dielectric layers formed from the glass powders prepared by spray pyrolysis had clean surface, dense inner structure, and high transparencies. The maximum transparency of the dielectric layer formed from the glass powders obtained by spray pyrolysis was 89% at the firing temperature of 580 deg C. The transparencies of the dielectric layers formed from the glass powders obtained by spray pyrolysis at preparation temperature of 1250 deg C decreased from 90 to 67% when the firing temperatures of the layers were changed from 580 to 520 deg C.