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Ideal waveguide sealed windows, media tablets for military radar

Changchun Taiyuan Fluorophlogopite Co. Ltd.   Release time:2014/12/2   Browse:626 times

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  Ideal waveguide sealed windows, media tablets for military radar(军用雷达理想的波导密封窗、介质片)

Fluorphlogopite Mica used as the waveguide sealed windows for radar antenna feeder system, and the radar phase shifter polarization sheet

 

  Fluorphlogopite Mica (also called artificial mica, synthetic mica crystal) belongs to artificial mica crystal of silicate. It is the mica crystal which is smelted in a platinum crucible at the condition of high temperature of 1500, and the condition of process and the material ratio is controlled strictly. Its chemical formula is KMg3 (AlSi3O10) F2, not containing (OH) -. Its texture is very pure, and has very good electrical performance. Its volume resistivity is 1015 1016 Ω·cm (1000 times higher than natural mica); electrical breakdown strength is185 238 kV/mm which is 10 times of polytetrafluoroethylene(ptfe); dielectric constant is 5.6ε; dielectric loss is ( 1 4 ) × 10-4 tgδ; it can work under the condition of 1100 for long time. Fluorphlogopite Mica’s melting and crystallization temperature is 1375, and its stability of cold and hot shock is also very good. Through 10 times of cycle test by five CEPREI Laboratory(national testing center) in Guangzhou, Fluorphlogopite Mica’s properties are all qualified.


    Because of its low medium loss at high frequency, stable dielectric constant, not aging, not fragile, and easy debugging etc.., Fluorphlogopite Mica is the preferred material in high-tech fields.

 

As soon as we introduced Fluorphlogopite Mica (also called artificial mica) in 2004, it was used for the sealing windows (medium plates) in the radar antenna feeder system by fourteenth Research Institute of CETC Nanjing group and other groups, and they continue to use until now. Millimeter wave band (Ka band) material replaces the imported materials, and the cost reduced 10 times as much. Microwave band ((C band, L band) material replaces natural mica, PTFE and other low performance materials, and it overcomes the disadvantages such as easy to aging and deformation of PTFE and the problems of big loss of natural mica. The use of Fluorphlogopite Mica improves overall performance.

 

Fluorphlogopite Mica has been used as the the radar phase shifter polarization sheet by Xi'an thirty-ninth institute of Chinese Electronic Science and technology group and other organizations. It replaces the low performance material such as quartz glass and metal etc.., and it solves the problems that quartz glass is fragile and metal is not easy to debug.

 

We sincerely welcome friends from various fields to visit us, hoping your understanding about Fluorphlogopite Mica and using it. We can provide trial products to scientific research personnel at the high-tech fields for free.


       
        The relationship during the dielectric loss, temperature and frequency of Fluorphlogopite Mica