Singh, Shiv Prakash and Pal, Karan and Tarafder, Anal and Das, Mousumi and Annapurna, K and Karmakar, Basudeb (2010) Effects of SiO(2) and TiO(2) fillers on thermal and dielectric properties of eco-friendly bismuth glass microcomposites of plasma display panels. Bulletin of Materials Science, 33 (1). pp. 33-41. ISSN 0250-4707

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The effects of SiO(2) (amorphous) and TiO(2) (crystalline, rutile) fillers on softening point (T (s)), glass transition temperature (T (g)), coefficient of thermal expansion (CTE), and dielectric constant (E >) of zinc bismuth borate, ZnO-Bi(2)O(3)-B(2)O(3) (ZBIB) glass microcomposites have been investigated with a view to its use as the white back (rear glass dielectric layer) of plasma display panels (PDPs). The experimentally measured properties have also been compared with those of theoretically predicted values. Both the experimental and theoretical trends of these properties with added filler contents correlate very well. The interaction of fillers with glass which occurred during sintering at 560A degrees C has also been monitored by XRD and FTIR spectroscopic analyses. The microstructures and distribution of fillers in the glass matrix have been analyzed by SEM images. It is observed that the fillers have partially dissolved in the glass at the firing temperature leaving some unreacted filler as residue which results in ceramic-glass microcomposites. In consideration of the desired properties of white back of PDPs, the addition of TiO(2) filler to ZBIB glass is found to be more preferable than SiO(2) filler. The addition of 10 wt% TiO(2) filler yielded T (s), T (g), CTE and E > values of 560A degrees C, 480A degrees C, 82 x 10(-7)/K and 14 center dot 6 which are found to meet the desired values of < 580A degrees C, < 500A degrees C, < 83 x 10(-7)/K and < 15, respectively with respect to use of PD200 glass as substrate in PDP technology.

Item Type: Article
Uncontrolled Keywords: Composite materials; FTIR; Thermal properties; Dielectric properties
Subjects: Glass
Depositing User: Bidhan Chaudhuri
Date Deposited: 16 Feb 2012 07:50
Last Modified: 26 Mar 2012 07:57

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