It is shown that one way of synthesizing new composite materials for producing antenna fairings may be the method of molding billets from mixed suspensions of lithium aluminosilicate and quartz glasses followed by sintering to the required level of physicotechnical properties. These studies make it possible to isolate a region of SiO2 content (5–40%) within whose limits it is possible to prepare materials with quite high strength, i.e. from 75 to 120 MPa, and a broad spectrum of dielectric properties: a dielectric permittivity from 5.0 to 6.7, and a dielectric loss tangent from 0.009 to 0.007. It is established that the most uniform structure occurs for specimens molded from slips with a moderately fine SiO2 addition (5–7% content of 63–500 µm particles) that promotes the minimum amount of open porosity in billets.
Refractories and Industrial Ceramics – Springer Journals
Published: Feb 27, 2009
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