Impact-resistant ceramic insulator and manufacturing method thereof

Abstract

The invention discloses an impact-resistant ceramic insulator and a manufacturing method thereof. The impact-resistant ceramic insulator has impact strength of being not less than 1.5 J / cm<2>, volume resistivity of being not less than 1*10<14>Omega.cm, dielectric strength of being not less than 750 kV / cm, thermal conductivity of being not less than 20 W / m.K, bending strength of being not less than 600 Mpa, Young's modulus of being not less than 450 Gpa and fracture toughness of being not less than 55 Mpa. A one-stage multiple-sintering manner is adopted in every 4-5 mm, so that a finished insulator has a multi-layer buffer and support structure, can withstand multi-angle and high frequency impact energy; a micro-structure is formed on the surface of the insulator, so as to facilitate the use on one hand and also increase the impact resistance on the other hand; and the impact-resistant ceramic insulator provided by the invention has advantages of high economy, high impact resistance, high fracture toughness and high comprehensive mechanical properties.

Description

technical field [0001] The invention relates to the field of electronic components, in particular to an impact-resistant ceramic insulator and a manufacturing method thereof. Background technique [0002] Insulators are special insulation controls that can play an important role in overhead transmission lines. [0003] In the early years, insulators were mostly used on utility poles, and gradually developed into high-voltage wire connection towers where many disc-shaped insulators were hung at one end. It was used to increase the creepage distance, usually made of glass or ceramics, and was called an insulator. Insulators play two basic roles in overhead transmission lines, namely supporting wires and preventing current from returning to the ground. These two roles must be guaranteed; at the same time, insulators should have sufficient electrical insulation strength, moisture resistance and high temperature resistance. [0004] Among the relevant patents that have been appl...

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Problems solved by technology

[0004] Among the relevant patents that have been applied in China, the patent "High Insulation Silicon Carbide / Boron Nitride Ceramic Material and Its Preparation Method" (application number: 201310294766.0, publication date: 2015-01-14) discloses a silicon carbide / nitrogen Boron oxide ceramic material and its preparation method, but the two materials are brittle materials without any toughening treatment, the fracture toughness is not higher than 6Mpa, and the impact strength is not higher than 0.27J / cm 2 , easy to break or break under transportation and other vibration conditions. In addition, the invention belongs to high-temperature sintering (1900°C-2300°C) heating isostatic pressing molding, and its cost is too high to be industrialized. Inorganic nanocomposite ceramics and its preparation method and use" (application number: 201410310359.9, publication date: 2015-12-30), which discloses an inorganic nanocomposite ceramic, which ensures that its active ingredients are highly brittle materials after being made into ceramics , without toughening treatment, and because several active ingredients have no obvious functional complementarity, the comprehensive mechanical properties are poor

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