LIQUID COMPOSITE DIELECTRIC Russian patent published in 2016 - IPC H01B3/00 B82B1/00 

FIELD: instrument making.

SUBSTANCE: invention relates to production of materials for electrophysical instrument making, namely, to composite dielectrics, and may be used in designing various electronic instruments and devices which working parameters are determined by permittivity of the inter-electrode space capacitive elements, including manufacturing of microcapacitors and capacitive sensors of pressure and movement. Higher material permittivity while retaining high yield in wide temperature range is the technical result of the invention. Liquid composite insulator includes an organic liquid with homogeneously dispersed in it powder ferroelectric material in the form of a composite oxide with particle size of not exceeding 400 nm, stabilizing additive in the form of a surfactant which prevents deposition of solid phase from liquid dielectric in the amount of 1.0-1.5 % by weight of the total content of composite oxide powder in the mixture, and an additive organometallic compound, increasing density of the organic liquid, in amount of 2-5 % of the weight of organic liquid. Composite oxide is represented by compound of composition K_1.46Ti_8-xMe_xO₁₆, where Me = Fe or Ni, x = 0.3-0.7, and organic liquid is a liquid with freezing point not above -40°C and boiling temperature is no lower than +150 °C, with total content of ferroelectric material nanopowder from 35 to 45 weight parts, and organic liquid - from 55 to 65 weight parts.

EFFECT: obtained liquid composite dielectric material has high fluidity and stability to stratification, and also has a dielectric permeability not less than 10⁵ at frequency of 40 Hz.

4 cl, 3 dwg, 1 tbl