Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
권호 표지
DOI QR코드

DOI QR Code

Fabrication of Transparent Dielectric Green Sheet for Plasma Display Panel

PDP 투명유전체 형성용 Green Sheet 제조

  • Heo, Sung-Cheol (Thin Film Materials Research Center, Korea Institute of Science and Technology) ;
  • Park, Duck-Kyun (Department of Ceramic Engineering, Hanyang University) ;
  • Oh, Young-Jei (Thin Film Materials Research Center, Korea Institute of Science and Technology)
  • Published : 2004.04.01
Download PDF
⟨ Previous Next ⟩

Abstract

To fabricate green sheet of transparent dielectric for PDP front panel, dispersion of transparent dielectric slurry, density, and mechanical properties of green sheets have been investigated as a function of amount and composition of organic additives. Measurements of sedimentation and viscosity were employed to determine a proper dispersant and its amount for a well dispersed transparent dielectric powders in non-aqueous system. Green sheets, having various ratios of transparent dielectric powders to transparent dielectric powders＋ binder＋plasticizer and binder to binder＋plasticizer, were fabricated. All the tape casting slurries showed shear thinning effect, that is, the apparent viscosity decreased with the increase of shear rate. It was found that the amount and composition of organic additives were main variables to affect densities and mechanical properties of transparent dielectric green sheets for PDP.

Plasma Display Panel(PDP) 상판용 투명유전체의 green sheet를 제조코자 투명유전체 슬러리의 분산특성 및 유기물의 함량과 조성비에 따른 밀도와 기계적 특성을 연구하였다. 비수계 시스템에서 슬러리의 완전분산을 위한 분산제의 종류와 분산제의 양을 결정하기 위해 침강실험, 점도측정을 행하여 최적의 분산조건을 구하였다. 조성물 변수로서 투명유전체조성 분말/(투명유전체조성 분말＋유기물)의 비와 결합제/(결합제＋가소제)의 비를 각각 변화시켜 green sheet를 제조하였다. 제조된 tape casting 슬러리의 대부분은 의가소성(pseudoplastic) 거동을 보이는데, 의가소성 거동은 shear thinning의 효과를 가지는 것으로 기술 할 수 있다. 각각의 조성을 가지는 슬러리는 모두 전단속도가 증가함에 겉보기 점도가 감소하는 shear thinning 효과를 보여 주었다. Green sheet의 특성을 조사한 결과 유기물의 함량 및 조성이 green sheet의 밀도와 기계적 특성을 결정하는 중요한 인자가 되었다.

Keywords

References

  1. Yogyo-Kyokai-Shi v.94 no.3 A Study on the Alumina Ceramics Casting Conditions by the Doctor Blade Method and their Effect on the Properties of Green Tape(Part) K.Otsuka;Y.Ohsawa;K.Yamada;Sekibat https://doi.org/10.2109/jcersj1950.94.1087_351
  2. Yogyo-Kyokai-Shi v.94 no.11 A Study on the Alumina Ceramics Casting Conditions by the Doctor Blade Method and their Effect on the Properties of Green Tape(Part) K.Otsuka;Y.Ohsawa;K.Yamada;Sekibat https://doi.org/10.2109/jcersj1950.94.1095_1136
  3. J. Ceram. Soc. Jpn. v.100 no.10 Rheology behavior of Suspension and Properties of Green Sheet-Effect of Compatibility between Dispersant and Binder K.Nagata https://doi.org/10.2109/jcersj.100.1271
  4. Ceramic Processing before Firing Tape Casting of Ceramics R.E.Milstler;D.J.Shanefield;R.B.Runk;G.Y.Onoda(ed.);L.L.Hench(ed.);Wiely(ed.)
  5. A Doctoral Thesis, Yunsei Univ. Fabrication of All-Ceramic Crown Core Using Tape Casting M.H.Lee
  6. Am. Ceram. Soc. Bull. v.71 no.10 The Role of Slip Additives in Tape-Casting Technology: Part Ⅰ-Solvents and Dispersants R.Moreno
  7. Introduction to Modern Colloid Science Effect of Polymer on Colloid Stability R.J.Hunter;Oxford(ed.)
  8. Adv. Ceram. Mater. v.3 no.4 Casting behavior and Tensile Strength of Cast $BaTiO_3$ Tape A.Karas;T.Kumagai;W.R.Cannon
  9. Am. Ceram. Soc. Bull. v.64 no.5 Biscosity of Tape-Casting Slips L.Braun;J.R.Morris,Jr.;W.Toger Cannon
  10. A Master's Thesis, Younsei Univ. The Lamination and Sintering Mechanism of Pore-Controlled Alumina Tapes H.Choi
  11. Am. Ceram. Soc. Tape Casting Theory and Practice R.E.Milstler;E.R.Twiname