black alumina ceramic

Black alumina ceramics, black in appearance, similar in performance to traditional alumina ceramics, microscopic porous structure, referred to as “black porcelain”.

Properties of  Black Alumina Ceramics

Advantages of alumina ceramics

Like traditional alumina ceramics,  black alumina ceramics have good insulation properties, small expansion coefficient, high thermal conductivity, high mechanical strength, good light-proof, wear resistance, low dielectric loss and other excellent characteristics. Due to its unique properties, it has received extensive attention and attracted more researchers to develop and study it. In the future, the application of black alumina ceramics in air pollution control and smelting metal filtration is already possible.

Disadvantages of alumina ceramics

Although black alumina ceramics have unique and excellent properties, because they are porous products,  black alumina ceramics have great brittleness, and severe cracks often occur during the sintering process. These performances are very To a large extent, it limits the application and popularization of black alumina ceramics. Therefore, in the research industry, this problem has been plaguing scientific researchers for a long time, but until now, no effective and obvious improvement method has been found. If a solution cannot be found in time, its use will definitely be affected.

At present, in the market of ceramic preparation, there are many ways of toughening black corundum ceramics, such as particle toughening, toughening transformation, and adding an appropriate amount of ductility to its toughening. While designing black alumina ceramics, we should also look for new ways and means.

Application of black alumina ceramics

Black alumina ceramic substrate

Black alumina ceramic substrate 01

Black alumina ceramic substrates are mostly used in semiconductor integrated circuits and electronic products. This is mainly due to the high light sensitivity of most electronic products. Packaging materials need to have strong shading properties to ensure the clarity of the digital display. It is packaged on a black alumina ceramic substrate. With the continuous upgrading of modern electronic components, the demand for black aluminum oxide packaging substrates is also expanding. At present, research on the manufacturing process of black alumina ceramics is being actively carried out at home and abroad.

The black alumina ceramic substrate for electronic product packaging is based on the needs of its application field. The selection of black coloring materials needs to combine the properties of ceramic raw materials. For example, ceramic raw materials need to be considered for better electrical insulation.

Therefore, in addition to the final coloration and mechanical strength of the ceramic substrate, the black coloring material must also consider electrical insulation, thermal insulation and electronic properties. Other functions of packaging materials. During the ceramic coloring process, the low temperature environment may affect the volatility of the coloring material and keep it warm for a certain period of time. During this process, free coloring materials may aggregate into spinel compounds, preventing the continued existence of coloring materials in high temperature environments. Volatility guarantees a coloring effect.

Other Applications for Black Alumina Ceramics

95% black alumina ceramic structure 01

In addition to being used in semiconductor integrated circuits and electronic products, black alumina ceramics can also be used in electronic bases, ceramic metallization, ceramic heating plates for hair straighteners, ceramic heating rods for faucets, and food processing machinery and equipment.


With the continuous improvement and development of science and technology and related ceramics, in the near future, the brittleness problem of black alumina ceramics will be solved in time, and its porous characteristics will be more widely used in alumina ceramics. 

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