DEVELOPMENT AND CHARACTERIZATION OF MICROWAVE ABSORBING PAINT USING MANGANESE SUBSTITUTED BARIUM HEXAGONAL FERRITE

Abstract

Attempt is made to develop microwave absorbing paint in the Ku-Band (12.5 to 18.0 GHz) using (Co-Ti) and Mn substituted Barium Hexagonal Ferrite. Various thickness of paints for 'single layer and double layer between.0.6 :, : mm to 2.3 mm are fabricated and tested experimentally. The effect of manganese in Barium Hexagonal . Ferrite is also studied on Microwave absorption in this band. It has been observed that the absorption decreases as the concentration of manganese increases beyond 0.46% by weight. However double layer microwave absorbing paint provide higher absorption and also gives broad band characteristics. It has been also observed experimentally that the addition of small amount of iron and carbon powder (10% by weight) further increases absorption. Further the ferrite is also developed from industrial waste out of textile industries and is used in making absorbing paints. The absorption of 13 dB with thickness of 2.3 . mm is obtained experimentally.