Thermal and electrical properties of BaO-B2O3-ZnO glasses

Glasses in the BaO-ZnO-B2O3 system were examined as potential replacement for PbO glass frits with low firing temperature (500-600 degreesC) for the dielectric layer of a plasma display panel (PDP). The glasses were evaluated for glass transition temperature (T-g), thermal expansion coefficient (alpha) and dielectric constant e. The electrical and the thermal properties were also compared with theoretical data calculated by a known empirical equation. T, of the glasses varied between 480 and 560 degreesC, and a was in the range of 7-9x10(-6)K(-1). The dielectric constant ranges from 14 to 19 and the theoretical data showed lower alpha and epsilon than the experimental data. The results suggest that BaO-ZnO-B2O3 glasses would be suitable as an alternative to Pb-based dielectric layer in PDPs. (C) 2002 Elsevier Science B.V. All rights reserved.