A pure black alumina ceramic material

Abstract

The invention discloses an aluminum oxide pure black ceramic material. The aluminum oxide pure black ceramic material comprises the following components in percentage by weight: 77.5 to 95.0 percent of alpha-aluminum oxide, 2.5 to 7.5 percent of ferric oxide, 2.0 to 10.0 percent of manganese dioxide and 0.5 to 5.0 percent of nickel oxide. The invention also discloses a formula and a processing method of the aluminum oxide pure black ceramic material. The ferric oxide, the manganese dioxide, the nickel oxide and the alpha-aluminum oxide are mixed according to the design ratio, so that the internal and external consistency of the ceramic material is greatly improved and the ceramic material is pure black. The sintered product has low shrinkage ratio and good consistency.

Description

technical field [0001] The invention relates to the technical field of electronic ceramics, in particular to a pure black alumina ceramic material. Background technique [0002] Ceramics that can use electricity and magnetic properties in the electronics industry are called electronic ceramics. Electronic ceramics are ceramics with new functions obtained through the control of surface, grain boundary and size structure. It can be widely used in energy, household appliances, automobiles, etc. [0003] At present, black electronic ceramic materials are usually mixed and finely ground by iron, manganese, chromium + α-alumina ball mills, then made into wax cakes, and then made into products. The appearance of its products is: coffee black, while the inside is iron red and black. In addition, a large amount of cobalt dioxide is also added on this basis, so that the price of cobalt is quite expensive, and the cost is greatly increased. Although the color is better than the orig...

AI Technical Summary

Problems solved by technology

In addition, a large amount of cobalt dioxide is also added on this basis, so that the price of cobalt is quite expensive, and the cost is greatly increased. Although the color is better than the original, it is blue-black, and the inside and outside are still inconsistent.

There are also some companies that directly purchase the black color base and add α-alumina to make products after grinding and mixing. The blackness of the product has improved, but it is not pure black, and the inside and outside are still inconsistent.