The difference between transparent and black alumina ceramics

What is the transparency of alumina ceramics? Alon transparent ceramics have the advantages of high visible-mid-infrared transmittance, excellent mechanical strength, good thermal shock resistance and so on, compared with single crystal materials (such as Sapphire) , Alon transparent ceramics have lower production cost and are easy to fabricate large-size special-shaped devices. Supported by the major research projects of the state foundation of China and the 100-person plan of the Chinese Academy of Sciences, the direct nitriding method was Chinese Academy of Sciences by the Zhou Youfu Research Group of the key laboratory of optoelectronic materials chemistry and physics of the Chinese Academy of Sciences, Fujian Institute of Material Structure, alon ultrafine powder with high purity and high sintering activity was synthesized at low cost. Alon ceramic discs (53mm in diameter) were prepared by ball milling, molding and pressureless sintering, the linear transmittance at 400 nm and 1100 nm was 77.1% and 80.6% , respectively. This work has been published in the journal of Ceramics (j.eur.ceram.soc. , 2015,35,1173-1178) and patented in China. The results provide a basis for the development of larger size and complex shape AlON transparent ceramic optical components and the realization of practical and engineering application of Alon Transparent Ceramics.

What is alumina ceramic? Because of its unique properties, the black alumina ceramics have received widespread attention, and are more attractive to researchers for development and research, it is possible to control the air pollution and filter the molten metal, but there are still many problems to be solved in time. The brittleness of alumina ceramics still needs to be improved, and brittleness is one of its fatal shortcomings, which limits the use of black alumina ceramics in different fields to a great extent, although the relevant professionals have been studying it, but there will be many problems. Improve the strength of black alumina ceramics in the performance, because of its porosity is very much, so to a large extent reduce the strength of its performance, timely strength optimization is actually a great relationship between porosity. To find a way to accurately control the pore size and shape distribution of black alumina ceramics. Looking for mode of production to manufacture porous alumina ceramics on a large scale and at low cost. Because science and technology and related fields are constantly improving and developing, the problems mentioned above will certainly be solved in a timely manner in the near future, and porous alumina ceramics will be more widely used.

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