Effects of Bi₂O₃ and Na₂O on the Thermal and Dielectric Properties of Zinc Borosilicate Glass for Plasma Display Panels

Abstract

An approach to select appropriate network modifiers to tailor the thermal and dielectric properties of zinc borosilicate (ZBS) glass has been explored to apply the glass composition to a dielectric layer of plasma display panels. Based on ionic field strength of the modifiers and the ionic polarizability of the corresponding crystalline form, Bi 2 O 3 and Na 2 O modifiers have been selected to modify the thermal and dielectric properties of the glass toward the required properties for the application (440oT g o4601C, 7.5 Â 10 À6 oCTEo8.5 Â 10 À6 /K, and 10oKo15). Bi 2 O 3 addition to ZBS could meet all the required properties simultaneously at a given addition range (8.5-14 mol%), while the addition of Na 2 O could not meet all the properties at a single composition range.

EPR, FTIR, optical absorption and photoluminescence studies of Fe2O3 and CeO2 doped ZnO–Bi2O3–B2O3 glasses

“…Among the other HMO glasses, bismuth oxide glasses have wide range of applications in the field of glass ceramics, layers for optical and electronic devices, thermal and mechanical sensors, reflecting windows [3,4]. Now-a-days lead oxide glasses have been restricted in various applications as it is hazardous to health and environment [5]. In this context, bismuth oxide has been a suitable substitution of lead oxide in glass preparation for its high refractive index, non-toxicity, wide transmission range, low melting temperature, etc.…”

Measurement of the mechanical properties of silver and enamel thick films using nanoindentation

“…Chromite spinels, such as MgCr 2 O 4 , Mn 1.2 Cr 1.8 O 4 , CoCr 2 O 4 , NiCr 2 O 4 , or ZnCr 2 O 4 , have a CTE ranging from 6.8 to 7.5 10 −6 /K −1 . Bismuth‐Zinc borosilicates glasses such as glass with composition of 65 wt% ZnO, 25 wt% B 2 O 3 , and 10 wt% SiO 2 with extra 10 to 15 wt% Bi 2 O 3 have a CTE ranging from 7.7 to 8.5 10 −6 /K −1 . For a given glass ceramic, when the particles has a lower thermal expansion coefficient than the surrounding glass matrix, compression residual stresses are developed on the precipitate upon cooling.…”

Calcium Zinc Borosilicate Glass with High Thermal Expansion Coefficient for LTCC Applications

“…Therefore, the Appen constant of CTE is the effective CTE of an oxide when it is dissolved in glass network. The approach of tailoring the properties of glasses, based on and reported effective properties, was shown to be qualitatively valid in many existing works 6–10 . As the developed high CTE glass is aimed to be applied as a dielectric material, the dielectric constant of the glass has been also estimated and compared with the predicted value based on as reference data.…”

“…The design tool employed in the current work has been the effective CTE value of the oxides in glass network, which allows the prediction of the CTE of the resultant glass by the formula, where p is the property (CTE or dielectric constant) of the resultant glass, and p i and x i are the effective property (CTE or dielectric constant) and mole fraction of the oxide species i . The effective CTE and dielectric constant of some readily available oxides provided by Appen 3,4 and others 5,6 are shown in Table I.…”