Ceramic tube for explosionproof fuse for automobile and preparation method of ceramic tube

Abstract

The invention discloses a ceramic tube for an explosionproof fuse for an automobile. The ceramic tube is prepared from ceramic materials comprising the following components in percentage by weight: 82.0-88.0wt% of cordierite, 3.00-6.00wt% of phosphorus trioxide, 2.00-3.00wt% of strontium carbonate, 3.00-6.00wt% of titanium dioxide, 0-2.00wt% of yttrium oxide and 1.00-3.00wt% of silicon dioxide. The invention further discloses a preparation method of the ceramic tube for the explosionproof fuse for the automobile. The ceramic tube for the explosionproof fuse for the automobile based on the ceramic material with cordierite as a principal crystalline phase has very low expansion coefficient so as to realize an anti-cracking effect. Meanwhile, pollution to around circuits and electronic elements by heat generated by the blown fuse can be prevented.

Description

technical field [0001] The invention relates to the technical field of automotive lighting equipment, in particular to a porcelain tube for an automotive explosion-proof fuse and a manufacturing method thereof. [0002] Background technique [0003] With the rapid development of the automobile industry, while pursuing comfort and ease of handling, safety, energy saving and environmental protection are also being paid more and more attention. Many parts in automobiles need to be installed with explosion-proof fuses, especially in LED lamps, an insulating tube needs to be set outside these explosion-proof fuses. Currently, these insulating bushings are usually made of a-Al 2 o 3 Made of ceramics as the main crystal phase. [0004] a-Al 2 o 3 The chemical bonds in ceramics are ionic bonds and covalent bonds. For ionic bonds, once the interatomic distance increases due to thermal expansion, the Coulomb force will be significantly reduced and the potential energy will be s...

AI Technical Summary

Problems solved by technology

[0005] At present, the a-Al 2 o 3 Porcelain tubes for explosion-proof fuses have an expansion coefficient of about 6.7 to 8.0, poor heat insulation and toughness, and cannot meet the requirements of circuit environments with large operating currents.

When the fuse is blown, the instantaneous current is very large, especially when the fuse is blown due to the short circuit of the load. If the porcelain tube cannot be insulated or cracked when the fuse is blown, it will cause damage to the surrounding circuit or pollute the environment.