Ultra-high hardness brown glaze for insulator and preparation method thereof

Abstract

The invention discloses ultra-high hardness brown glaze for an insulator and a preparation method thereof. The glaze is characterized by being prepared from the following components in percentages by weight: 6-7% of white corundum micropowder, 10-13% of self-made microcrystal ceramic powder, 30-33% of quartz, 10-15% of zirconium silicate micropowder, 6-8% of albite, 5-7% of lithium feldspar, 5-7% of wollastonite, 1-2% of barium carbonate, 8-13% of synthesized cordierite, 7-12% of standard clay, 1-2% of ferric oxide, 1-2% of chromic oxide and 3-5% of manganese oxide. The glaze disclosed by the invention has the advantages that the glaze has good scratch resistance, the glaze hardness reaches 7-level Moh's hardness or above, the glaze of the insulator can bear metals, invasion of sand blown by the wind, and scratches are not generated.

Description

technical field [0001] The invention relates to the technical field of glazes for insulators, in particular to an ultra-high hardness brown glaze for insulators (Mohs hardness is not less than 7 grades, and the strength of a test strip is 67.6 MPa) and a preparation method thereof. Background technique [0002] Insulators for high-voltage power transmission and transformation are generally made of insulating parts and metal accessories glued with glue or mechanically clamped. It is an indispensable insulating material in the power industry. It generally belongs to external insulation and works under natural atmospheric conditions or high voltage conditions. Overhead transmission lines, busbars of power plants and substations, and external live conductors of various electrical equipment must be supported by insulators and insulated from the earth (or ground) or other conductors with potential differences. [0003] Insulators generally use a variety of minerals and clay mate...

AI Technical Summary

Problems solved by technology

As the protective layer glaze of the insulator, it covers the outer and inner surfaces of the insulator and directly contacts with the outside world. Under the harsh working environment, such as in the Gobi desert, high temperature and high pressure environment, the glazed surface of the insulator is constantly subjected to wind and sand. If the glaze hardness is lower than 6 (Mohs hardness), the surface of the insulator is easily scratched and roughened by gravel, the surface becomes rough, easy to accumulate dirt, loses self-cleaning ability, may cause pollution flashover accidents, and cause large-scale power outages

The hardness of the glaze surface is low. During the cutting and grinding process of the hollow porcelain insulator after firing, it is easy to be scratched by the metal shaft and foot pad in the inner hole. The cracking source of hollow insulator damage leads to the explosion of the insulator during use, causing great safety hazards