Optical Grade Transparent Spinel Ceramic

Of spie 8708 window and dome technologies and materials xiii edited by r.

Optical grade transparent spinel ceramic. While transparent spinel ceramic s mechanical and optical characteristics are ideal for many ultraviolet uv visible short wave infrared swir mid wave infrared mwir and multispectral sensor window applications commercial adoption of the material has been hampered because the material has historically been available in relatively small sizes one square foot per window or less low. Available in large sizes up to 18x35. Some of the key properties of alon and spinel optical ceramics are given in table 1. While transparent spinel ceramic s mechanical and optical characteristics are ideal for many ultraviolet uv visible short wave infrared swir mid wave infrared mwir and multispectral sensor window applications commercial adoption of the material has been hampered because the material has historically been available in relatively small sizes one square foot per window or less low.

This all becomes even more challenging for components with complex geometries. Shaffer manufacturing process scale up of optical grade transparent spinel ceramic at armorline corporation proc. Optical quality transparent spinel has been produced by sinter hip hot pressing and hot press hip operations and it has been shown that the use of a. Magnesium aluminate spinel mgal 2 o 4 is a transparent ceramic with a cubic crystal structure with an excellent optical transmission from 0 2 to 5 5 micrometers in its polycrystalline form.

Outstanding hardness scratch resistance and high strength high quality. Synthesis of optical grade spinel ceramics superior to commercially available single crystal spinel was successfully achieved through reactive sintering between high purity mgo and al 2 o 3 powders with a small amount of mgf 2 and alf 3 as sintering aids. Additionally transparent ceramic components must go through grinding and polishing in order to achieve transparency. Perlucor exhibits three to four times the hardness and strength of conventional glass making it well suited for use in extreme wear conditions.

Surmet s magnesium aluminate spinel or simply spinel is a durable polycrystalline ceramic with optical transparency from the near ultraviolet through the mid wave infrared mwir spectrum. Indian land to purchase and install the equipment needed for. Key properties and applications. The average grain size of the fabricated spinel ceramics was approximately 20 μm with residual porosity at the 10 13 level.

Further unique properties include the material s higher. Alon optical ceramic s key features. Surmet is a leading supplier of optical products made from spinel a high performance transparent and polycrystalline ceramic material. Excellent refractive index homogeneity over large areas commercially available.

Its high transparency grade ceramic has an optical grade of 92 relative transparency 80 it opens up fields of application for perlucor everywhere glass reaches its limits.