An article that takes you through the light transmission of alumina ceramics
July 4, 2023
An article that takes you through the light transmission of alumina ceramics
Mei Cheng ceramic manufacturers are professional production of alumina ceramics, zirconia ceramics production and processing manufacturers, many customers in doing alumina ceramic products need a certain degree of light transmission, then we know what are the factors affecting the light transmission of alumina ceramics? The following will be explained by the beauty Cheng ceramic manufacturers.
Transparency is a key performance of alumina ceramics, it is related to the basic chemical composition of the material, but also depends on the microstructure of this material. So, alumina ceramic transparency how also depends on the ceramic porosity, grain size, grain boundary structure and surface processing finish and other factors.
The preparation process of alumina ceramics is essentially a densification process that completely excludes microscopic porosity during the sintering process. The size, number, and type of porosity in the material can have a significant effect on its transparency. In addition to porosity, the diameter of the pores also has a significant effect on the light transmission of alumina ceramics, with the lowest transmission rate when the pore diameter is comparable to the incident light wavelength.
The grain size of alumina ceramic polycrystals also has a great influence on the transmittance. When the incident light wavelength is equal to the grain diameter, the light scattering effect is the greatest and the transmittance is the lowest. In view of this, in order to improve the light transmission of alumina ceramics, the grain size should be controlled outside the wavelength range of the incident light.
It is understood that grain boundaries are one of the important factors that destroy the optical homogeneity of alumina ceramic bodies, thus causing light scattering and resulting in a decrease in the light transmission of the material. Moreover, the greater the difference in composition of the material, the greater the difference in refractive index, the lower the light transmission of the entire alumina ceramic.
In addition, the transmittance of alumina ceramics is also affected by the surface roughness, in addition to the fine dispersion of raw materials, but also with the surface of the ceramic machined finish. For the sintered untreated alumina ceramic surface has a large roughness, so light incident on such surface will occur diffuse reflection, resulting in light loss.
The above is the content brought to you by Mecheng ceramics. Mei Cheng ceramic is a collection of R & D, production, sales in one of the electronic ceramics enterprises, start listed companies, is located in Xinhua County, Hunan Province, electronic ceramics industrial park, covers an area of 8W flat. Mainly engaged in: zirconia ceramics, alumina ceramics, talc ceramics and other non-oxide ceramics research and development and application.