Effect of the Physical Property of Insulator on the Slurry Stability

슬러리의 안정화가 애자의 물리적 특성에 미치는 영향

  • Published : 2001.12.01

Abstract

This paper was researched the effect of slurry stability on the mechanical and electrical property of the porcelain insulator with various raw materials such as feldspar, quartz, clay and l7wt% alumina. The slurry was fabricated after ball milling the mixed raw materials. Green compacts were made by the extrusion and were sintered at 1300$\^{C}$ for 60min in the tunnel kiln. All of the specimens were densified 96% of the theoretical density. The 3-point flexural strength($\sigma$$\_$B/) of the specimen stabilized slurry pH 7.8 was 1650 k9/㎠ and the vickers hardness(Hv) and the fracture toughness(K$\_$IC/) were 27.5 GPa and 2.2 MPa$.$m$\^$$\sfrac{1}{2}$/, respectively. The mechanical properties of the specimen stabilized slurry PH 9.3 were 1716 kg/㎠($\sigma$$\_$B/), 27.6 GPa(Hv) and 3.0 MPa$.$m$\^$$\sfrac{1}{2}$/(K$\_$IC/), respectively. The dielectric strength was increased from 8.3kV/mm to 13.2kV/mm as the increase of the slurry pH from 7.8 to 9.3. Therefore the physical properties of the specimen stabilized slurry pH 9.3 were improved.

Keywords

References

  1. J. Am. Ceram. Soc. v.81 no.1 Porcelain-raw Materials, Processing, Phase Evolution and Mechanical Behavior W.M.Carty;U.Senapati
  2. J. Ceram. Soc. Jpn. v.100 no.8 Improvement of Mechanical Strength of Porcelain Bodies by Grinding of Raw Materials K.Hamano;Z.Nakagawa;M.Hasegawa
  3. Am.Ceram.Soc.Bull. v.57 no.10 Inexpensive High Strength Electrical Porcelain J.E.Schoreder
  4. J. Am. Ceram. Soc. v.40 no.9 Mechanical Strength of Porcelain L.Mattyasovszky-Zsolnay
  5. Keram. Zeitschrift v.32 no.7 Electroporzellan Mit Sehr Guten Mechanischen Eigenschaften B.Zivanovic;S.Isakovski;M.Aleksic;N.Hajdukovic;J.Cinkler;J.Ranogajec
  6. Am. Ceram. Soc. Bull. v.49 no.5 Effect of Alumina Additions on Crystalline Constituents and Fired Properties of Electrical Porcelains S.K.Khandelwal;R.L.Cook
  7. Am. Ceram. Soc. Bull. v.40 no.2 High Strength Alumina Porcelains W.E.Blodgett
  8. Ceram. Eng. Sci. Proc. v.17 no.11 Al₂O₃-strengthened Feldspathic Porcelain Bodies:Effect of the Amount and Particle Size of Alumina R.Harada;N.Sugiyama;H.Ishida
  9. J. Mater. Sci. Lett. v.1 Evaluation of Kic of Brittle Solids by the Indentation Method with Low Cracks-to-indent Ratio K.Niihara;R.Morena;D.P.H.Hasselman
  10. J. Am. Ceram. Soc. v.52 no.2 Kinetics and Mechanism of High-temperature Reaction of Kaolinite Minerals J.F.Duncan;K.J.D.Mackenzie
  11. J. Am. Ceram. Soc. v.61 no.3-4 Feexamination of the Kaolinite-to-mullite Feaction Series A.K.Chakraborty;D.K.Ghosh
  12. J. Am. Ceram. Soc. v.73 no.5 Surface Forces and Their Action in Ceramic Materials R.G.Horn
  13. Sol-Gel Science C.J.Brinker;G.W.Scherer
  14. J. Mater. Res. v.9 no.2 Sedimentation in Flocculation Colloidal Suspensions C.H.Schilling;I.A.Aksay
  15. 세라믹스 총론 김병훈(외9명)(공역)
  16. 고신뢰성 자기재 배전용 현수애자개발(중간보고서) 김형식