Abstract: The heat-resisting material according to the present invention comprises a fiber aggregate containing crystalline alumina short fibers and formed in a continuous length and an inflammable sheathing for maintaining the shape of the fiber aggregate in a compressed state. The expansion percentage of the fiber aggregate after burn-off of the sheathing is not less than 10% by volume based on the volume of fiber aggregate in a compressed state. This heat-resisting material can be worked into various forms of product of the heat-resisting material such as rope, square bar, sheet, etc., according to the purpose of use. The present heat-resisting material is provided in continuously long products, has high heat resistance and restoring property, and can be easily applied to the openings or spaces ranged continuously in the longitudinal direction, such as the boundaries between the blocks of the heat-resisting material and joints.

Abstract: A zinc silicate phosphor represented by the formula:(Zn.sub.1-x-2y, M.sup.II.sub.x, Na.sub.2y).sub.2 SiO.sub.4 :Mn.sub.a, As.sub.b, M.sub.c (I)where M.sup.II is at least one element selected from the group consisting of barium, calcium and strontium, M is at least one of antimony and bismuth, and x, y, a, b and c satisfy the conditions of O.ltoreq.x.ltoreq.5.times.10.sup.-2, O.ltoreq.2y.ltoreq.5.times.10.sup.-3, 5.times.10.sup.-5 .ltoreq.a.ltoreq.3.times.10.sup.-2, O.ltoreq.b.ltoreq.5.times.10.sup.-3 and O<c.ltoreq.1.times.10.sup.-2, respectively (provided x+2y.noteq.0).

Abstract: A process for preparing a rare earth oxide type phosphor comprises compressing a starting mixture composed essentially of a matrix material for said rare earth oxide type phosphor, an activator material and a flux under a presssure of from 250 to 1500 kg/cm.sup.2 to form a compact, and firing and unbinding the compact thereby obtained.

Abstract: An electrochromic composition is composed of a solvent, an electrochromic compound having a high solubility to the solvent, and a compound selected from a group of ammonia, organic amine and alkali. The solubility of the electrochromic compound to the solvent is not less than 10.sup.-2 mol/100 g-solvent in a reduced state and not less than 10.sup.-1 mol/100 g-solvent in an oxidized state. A masking agent may be added to the EC compound. The EC composition is sealed in an EC display cell.

Abstract: An electrochromic display device composed of a pair of oppositely disposed electrode plates at one of which is transparent, and an electrochromic composition sealed between the pair of electrode plates. The electrochromic composition is composed of an electrochromic compound coloring in a reduced state and a solvent. The electrochromic compound coloring in a reduced state is sealed between the electrode plated in a reducing atmosphere. The solubility of the electrochromic compound to the solvent is 10.sup.-2 mol/(100 g solvent) or more in a reduced state and 10.sup.-1 mol/(100 g solvent) or more in an oxidized state. The solvent is preferably composed of water and at least 70% by weight of alcohol. The alcohol is desirably polyhydric alcohol.

Abstract: The display in a diffusion type electrochromic display device is turned off with high response by applying an A.C. input voltage having a frequency of one to ten times as high as the cut-off frequency. The diffusion type electrochromic display device is an EC display device which uses an EC composition consisting of an EC compound coloring in a reduced state and a solvent in which the solubility of the compound to the solvent is 10.sup.-2 mol/(100 g solvent) or more in a reduced state and 10.sup.-1 mol/(100 g solvent) or more in an oxidized state. The cut-off frequency is a critical frequency at a freqency higher than which the oxidization or reduction of the EC compound cannot follow the change in the input voltage, which is normally 20 to 50 Hz.

Abstract: When a 4,4'-substituted benzylideneaniline compound having specific substituents is compounded in a nematic liquid crystal material, a liquid crystal composition having a positive dielectric anisotropy and a broad mesomorphic range extending above and below room temperature can be obtained. An electro-optical element comprising a thin layer of this liquid crystal composition filled and supported between two substrates can be used for light modulation and display.

Abstract: A liquid crystal cell consisting of two planar supports and a spacer interposed between them only on the margin, said supports being fixed at intervals of a limit by the spacer to form an aperture, has at least one opening through which the liquid crystal material is poured into said aperture. The openings are sealed with use of cyanoacrylates or polybutadiene type resins so that the liquid crystal cell can be prevented from lowering of the characteristics caused by incorporating of impurities into the liquid crystal layer.

Abstract: When a 4,4'-substituted benzylideneaniline compound having specific substituents is compounded in a nematic liquid crystal material, a liquid crystal composition having a positive dielectric anisotropy and a broad mesomorphic range extending above and below room temperature can be obtained. An electro-optical element comprising a thin layer of this liquid crystal composition filled and supported between two substrates can be used for light modulation and display.

Abstract: In a liquid crystal display device comprising a pair of opposed electrode-mounted plates and a nematic liquid crystal layer, the electrode terminals are mounted on one plate by transferring the connection of one electrode to the opposite plate without directly contacting the liquid crystal material by interposing an electrically conductive material between the corresponding electrode terminal and the one electrode. In accordance with changes of environment, distinct patterns are obtained by making the front electrode of the liquid crystal display element transparent and the back electrode thereof a partial light-transmissive, mirror-like plane. The life of the liquid crystal element under application of D.C. field is increased by using titanium, zirconium and palladium as an essential component of the negative electrode of said element.

Abstract: In a liquid crystal display device comprising a pair of opposed electrode-mounted plates and a nematic liquid crystal layer, the electrode terminals are mounted on one plate by transferring the connection of one electrode to the opposite plate without directly contacting the liquid crystal material by interposing an electrically conductive material between the corresponding electrode terminal and the one electrode. In accordance with changes of environment, distinct patterns are obtained by making the front electrode of the liquid crystal display element transparent and the back electrode thereof a partial light-transmissive, mirror-like plane. The life of the liquid crystal element under application of D.C. field is increased by using titanium, zirconium and palladium as an essential component of the negative electrode of said element.