Development of a dielectric ceramics based on composite ressoadora x (CR3 / 8fe5 / 8) 203 - CaTiO3 1 - x for applications in dielectric antenna

摘要

Development of a dielectric ceramics based on composite ressoadora x (Cr,,, fe5,8) Zo, 1 - [Cato,] 1 - x for applications in antennas dieletricas ". The present invention relates to the development of a dielectric ceramic ressoadora based on mixture of two substances forming composites based on iron oxide, chromium oxide, calcium carbonate and titanium oxide.The method of the present invention is to undertake a new material, using the substances synthesized (CaTiO3 - CTO) and crfo - [(cr38fe5,3) zo3, in that its dielectric properties were improved considerably. The method involves the preparation of the compound by the traditional method of solid state, without any additional doping to the pressing phase.The materials are calcined to ll00u00b0c for 3h to the CTO and l300u00b0c during 5h. The series [x] crfo - [L - x] CTO was sintered at l200u00b0c for 3 h. The proposed method is able to undertake a ceramic dielectric ressoadora, operating with a resonance frequency from 2 to 9 GHz, with 0,0 x L, 0, which resulted in the COE? Aware of temperatures ranging from + 921 and - 57 ppm / C.The T = 0 ppm / C is found at x = 0.77 in accordance with the exponential adjustment is proposed.