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Deutschetelekom Ag

Lev M Blinov

Vadim M Shoshin

Viktor V Titov

Wolfgang Dultz

Wolfgang Haase

Leonid Beresnev

Vladimir G Rumyantsev

Mikhail F Grebenkin

Tamara S Pljusnina

Alexandr V Ivaschenko

Valentina T Lazareva

Elena K Prudnikova

Ljudmila A Karamysheva

Alexandr V Ivashenko

Yuri Galyametdinov

Irina F Agafonova

Eduardo Soto Bustamante

Mikhail I Barnik

Viktor A Nefedov

Sergei Yablonsky

Vladimir P Sevostyanov

Nikolai M Shtykov

Evgeny I Kovshev

A method of preparing a pyroelectric mixture, especially for pyroelectric and piezoelectric components. At least two compounds are mixed in a prescribed ratio. One compound contains polymerizable and preferably achiral liquid-crystal monomers and the other a preferably achiral liquid-crystal polymer or copolymer. Each compound also contains hydrogen-bridging substituents. The mixture is heated to above its specific vitrification point. An electric field is applied to polymerize the monomer and polarize the mixture. The mixture is cooled to below its specific glass transition point with the field still present.

Method of preparing a pyroelectric mixture and pyroelectric device

A mesomorphic material contains at least one compound 'A' ensuring a positive dielectric anisotropy of the material and a compound 'B' ensuring a lowered value of optical anisotropy of the material; the content of compound A is within the range of from 4.9 to 30.0% by weight, the content of compound B is within the range of from 70 to 95.1% by weight. The material of the invention has a dielectric anisotropy of from +1 to +10 and the value of optical anisotropy--within the range of from 0.04 to 0.1.

Mesomorphic material with low optical anisotropy and process for

Mesomorphic material containing 2,2'-azoimidazole compounds containing

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Moscow, Russia

Lev M Blinov