Improving usual and dielectric properties of ceramic high voltage insulators

Author:

Roula A.1,Boudeghdegh K.1,Boufafa N.2

Affiliation:

1. Jijel Univ, Algeria

2. S.C.S

Abstract

The optimization of the formulation (nature and content of chemical components) and the technical parameters of the shaping-up process of ceramic insulators (in replacement of those in glass) are the objectives of this study. The decontamination of SiO2 (solid-liquid extraction of Fe xOy) and the increase of both BaO and ZrO2 amounts (while Na2O is partially eliminated) and the firing temperature allowed a significant increase of all the phys-mechanical and insulating properties at the commercial frequency 50-60 Hz. Samples with 15 mm diameter and 2 mm thickness and others for mechanical properties were needed. The characterization concerned Ba-Zr(Al xSi1-x)O3 ceramic samples. By data computing of the test results, a new "computed" formulation (Ba-stabilized and Zr doped mullite) showed excellent phys-mechanical (density, viscosity, flexural and traction strengths) and insulating properties (transversal resistivity, dielectric strength).

Publisher

FapUNIFESP (SciELO)

Subject

Ceramics and Composites

Reference8 articles.

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2. Sintering and mechanical properties of stoichiometric mullite;Kanazaki S.;J. Am. Ceram. Soc.,1987

3. "New mullite ceramic packages and substrates", IEEE Trans. Components, Hybrids and Manufact;Horiushi M.;Techn.,1988

4. Matériaux isolants céramiques en électrotechnique;Dumora D.,1989

5. Glass-Ceramics for Microelectronic Packaging, Ceram. Trans.;Macdowell J. F.,1990

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