摘要:
Described are matrix liquid crystal displays having two plane parallel support plates which together with a frame form a cell, integrated non-linear elements for switching individual picture elements on the support plates and a nematic liquid crystal mixture which is present in the cell and has a positive dielectric anisotropy and high resistivity. The liquid crystal mixture has a nematic phase range of at least 60° C., a maximum viscosity at 20° C. of 30 mPa·s and a mean dielectricity constant ε≦8. The liquid crystal mixture contains: a) at least 10% by weight of a liquid-crystalline component B having one or more compounds of the following formulae: and b) up to 90% by weight of a liquid-crystalline component A having one or more compounds with a dielectric anisotropy of −1.5 to 1.5 of the formula I:
摘要:
The invention relates to a matrix liquid crystal display containing integrated non-linear elements and a liquid crystal mixture which has a particularly high resistivity.
摘要:
The invention relates to a matrix liquid crystal display containing integrated non-linear elements and a liquid crystal mixture which has a particularly high resistivity.
摘要:
The invention relates to a process for preparing lithium intercalation compounds by thermal solid state reaction of mixtures of lithium hydroxide or lithium oxide and oxides or oxide precursors of transition metals. A significant step of this process is the treatment of an aqueous suspension of the raw material components lithium hydroxide or lithium oxide and metal oxide or metal oxide precursors with hydrogen peroxide, resulting in the lithium compound going into solution. In the drying of the mixture, the lithium hydroxide is very uniformly absorbed onto the metal oxide. Calcination at temperatures between 450.degree. C. and 700.degree. C. results in complete reaction to form the lithium intercalation compound in less than 5 hours.
摘要:
Moldings, preferably comprising polyester which contains oxide particles which have been subjected to a surface modification with a silylating agent of the formula I �R.sup.1 R.sup.2 R.sup.3 !Si--(CH.sub.2).sub.l --X--R.sup.4 (I) wherein R.sup.1 is Cl or alkoxy having 1 to 6 carbon atoms, R.sup.2 and R.sup.3 are alkyl having 1 to 6 carbon atoms or R.sup.1, l is a number from 1 to 6, X is a single bond, O, NH, CONH or NHCONH, R.sup.4 is ##STR1## where Y is CH, ##STR2## Z is OR or two radicals Z together are --O-- or NR and m and n are a number from 0 to 6, or R.sub.4 is ##STR3## where X is a single bond and R, R' and R" are H or alkyl having 1 to 6 carbon atoms, and the use of said moldings are described.
摘要:
The invention relates to the use of stabilised organometallic adduct compounds for the production of thin films and epitaxic layers by gas phase deposition.
摘要:
The invention relates to the use of organometallic compounds containing, as metals, aluminum, gallium or indium for the deposition of thin films or epitactic layers from the gas phase.
摘要:
The invention relates to a matrix liquid crystal display containing integrated non-linear elements and a liquid crystal mixture which has a particularly high resistivity.
摘要:
The invention relates to organometallic compounds which are stabilized intramolecularly and have a cyclic or bicyclic structure and to the use thereof for the preparation of thin films and epitaxial layers by gas phase deposition.
摘要:
Liquid crystalline fluorine-containing pyrimidine compounds have the formula I ##STR1## wherein R.sup.1 and R.sup.2 are H, R, OR or OCOR, and one of them can also be CN or F, or, if A is a covalent bond, also one or both of R.sup.1 and R.sup.2 can be 4-R.sup.4 -phenyl or 4-R-cyclohexyl, wherein R.sup.4 is R, OR, cyano, f or OCOR; wherein R is an alkyl group of 1 to 12 C atoms; R.sup.3 is F or, if one of the radicals R.sup.1 or R.sup.2 is F or 4-fluorophenyl, also H; Z is 1,3-pyrimidin-2,5-diyl; and A is 1,4-phenylene, 1,4-cyclohexylene or a covalent bond.Fluorine-containing pyrimidine compounds are useful components of liquid crystal dielectrics for electro-optical display devices.
摘要翻译:液晶含氟嘧啶化合物具有式I的化合物,其中R 1和R 2是H,R,OR或OCOR,它们之一也可以是CN或F,或者如果A是共价键,也可以是一个或 R 1和R 2可以是4-R 4 - 苯基或4-R-环己基,其中R 4是R,OR,氰基,F或OCOR; 其中R是1至12个C原子的烷基; R 3为F,或者如果基团R 1或R 2中的一个为F或4-氟苯基,则为H; Z是1,3-嘧啶-2,5-二基; A是1,4-亚苯基,1,4-亚环己基或共价键。 含氟嘧啶化合物是用于电光显示装置的液晶电介质的有用组分。