Effects of SiO2 and TiO2 fillers on thermal and dielectric properties of eco-friendly bismuth glass microcomposites of plasma display panels

Bulletin of materials science

Shiv Prakash Singh¹  Kalyandurg Annapurna¹  Anal Tarafder¹  Mousumi Das¹  Basudeb Karmakar¹  Karan Pal¹ 

[1] Glass Division, Central Glass and Ceramic Research Institute (Council of Scientific and Industrial Research), Kolkata 700 032, India$$Glass Division, Central Glass and Ceramic Research Institute (Council of Scientific and Industrial Research), Kolkata 700 032, IndiaGlass Division, Central Glass and Ceramic Research Institute (Council of Scientific and Industrial Research), Kolkata 700 032, India$$

关键词: Composite materials;    FTIR;    thermal properties;    dielectric properties.;   

DOI  :  

学科分类：材料工程

来源: Indian Academy of Sciences

【 摘 要 】

The effects of SiO₂ (amorphous) and TiO₂ (crystalline, rutile) fillers on softening point (ð‘�??_s), glass transition temperature (ð‘�??_g), coefficient of thermal expansion (CTE), and dielectric constant (ðœ�?) of zinc bismuth borate, ZnOâ€�?�Bi₂O₃â€�?�B₂O₃ (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 560°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 ceramicâ€�?�glass microcomposites. In consideration of the desired properties of white back of PDPs, the addition of TiO2 filler to ZBIB glass is found to be more preferable than SiO₂ filler. The addition of 10 wt% TiO₂ filler yielded ð‘�??_s, ð‘�??_g, CTE and ðœ�? values of 560°C, 480°C, 82 Ã�? 10^-7/K and 14.6 which are found to meet the desired values of < 580°C, < 500°C, < 83 Ã�? 10^-7/K and < 15, respectively with respect to use of PD200 glass as substrate in PDP technology.

【 授权许可】

Unknown