Dispersion stability and Characterization of lead-free transparent dielectric glass frit

Title
Dispersion stability and Characterization of lead-free transparent dielectric glass frit
Authors
오영제이진원
Keywords
Dispersant; Slurry; Green sheet; Lead-free; Transparent dielectric; PDP
Issue Date
2009-10
Publisher
Journal of ceramic processing research / International organization for ceramic processing
Citation
VOL 10, NO 5, 657-663
Abstract
The effect of solvents and dispersants on the slurry dispersion stability in tape castings of lead-free transparent Bi2O3-ZnOBaO- Al2O3 dielectric layers for plasma display panel (PDP) were studied. A comparative study of mechanical and optical properties of the green sheets fabricated with and without dispersion stabilizers was performed. The optimum dispersion stability, which was due to steric stabilization, was observed for a 1.5 wt% polyethylene glycol solution in methanol with 33.3% solid loading; the corresponding green sheet demonstrated the best mechanical and optical performance after firing. The green sheet prepared by dispersion stability had a stronger tensile strength of 6.6 kg/cm2(6.47MPa) and more uniform microstructure than the green sheet prepared without dispersion stability (tensile strength of 4.6 kg/cm2(4.51MPa)). The optimum result was obtained by fire processing a green sheet at 505 oC for 30 minutes; the dielectric layer obtained with 30 μm thickness on sodalime glass substrate had a transmittance of 81% at a reference wavelength of 550 nm without a yellowing phenomenon.
URI
http://pubs.kist.re.kr/handle/201004/36347
ISSN
1229-9162
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KIST Publication > Article
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