The ceramic material for the antenna radome, radome AND ITS MANUFACTURING METHOD

摘要

1. The ceramic material for the antenna radome comprising: - about 90-94% (wt%.) SiN; u about 6-10% (wt.%) of magnesium aluminosilicate comprising 3,2-5,2% (% wt.) SiO, 0,7-2% (% wt.) MgO and 2,1-4% (% wt.) AlO; having a density of not less than 2.5 g / cm and a dielectric constant of not more than 6,5.2. Ceramic material according to Claim. 1, in which said density is from 2.5 to 2.9 g / cm and / or said dielectric constant is from 5.7 to 6,4.3. Ceramic material according to Claim. 1, in which 15-35% (wt.%) SiNpredstavlyaet a β-SiN.4. Ceramic material according to any one of claims. 3.1 containing 90% (wt%.) SiN; 5.1% (% wt.) SiO, 1,4% (% wt.) MgO and 3.5% (% wt.) AlO.5. An antenna radome comprising a ceramic material according to any one of claims. 1-4.6. The method of manufacturing the antenna radome, comprising the following steps: a. forming a homogeneous mixture of about 80-95% (wt.%) powder SiNi about 5-15% (wt.%) of magnesium aluminosilicate powder comprising 2,5-12,5% (% wt.) SiO, 0,5- 3% (mass%.) MgO and 2.6% (% wt.) AlO; b. adding at least one organic binder to the mixture; c. spraying the mixture; d. isostatic pressing of the mixture at ambient temperature in a special mold so as to form a raw semifinished product; e. machining the raw semifinished product to give it a substantially final form; f. subjecting the molded raw semifinished thermal cycle; g. sintering raw semifinished product so as to get ready produkt.7. . A method of manufacturing an antenna radome according to claim 6, wherein step a comprises forming a homogeneous mixture of the following two sub-steps: a '. mixing SiNs SiOdlya forming a premix; and ". mixing the premix with MgO and AlO.8. A method of manufacturing an antenna according to claim fairing. 6 or 7, wherein the step of subjecting the semi f thermal cycle comprises the following podeta