Showing papers on "Inorganic compound published in 1994"

Organization of Organic Molecules with Inorganic Molecular Species into Nanocomposite Biphase Arrays

Abstract: The organization of cationic or anionic organic and inorganic molecular species to produce three-dimensional periodic biphase arrays is described. The approach uses cooperative nucleation of molecular inorganic solution species with surfactant molecules and their assembly a t low temperatures into liquid-crystal-like arrays. The organic/inorganic interface chemistry makes use of four synthesis routes with @+I-), @-I+), (S+X-I+), and (S-M+I-) direct and mediated combinations of surfactant (cationic S+, anionic S-) and soluble inorganic (cationic I+, anionic I-) molecular species. The concepts can be widely applied to generate inorganic oxide, phosphate or sulfide framework compositions. Distinct lamellar, cubic silica mesophases were synthesized in a concentrated acidic medium (S+X-I+), with the hexagonal and the cubic phases showing good thermal stability. For the hexagonal mesostructured silica materials high BET surface areas (>lo00 m2/g) are found. Hexagonal tungsten(V1) oxide materials were prepared in the presence of quaternary ammonium surfactants in the pH range 4-8. Cubic (Iu3d) and hexagonal antimony(V) oxides were obtained by acidifying (pH = 6-7) homogeneous solutions of soluble Sb(V) anions and quaternary ammonium surfactants a t room temperature @+I-). Using anionic surfactants, hexagonal and lamellar lead oxide mesostructures were found (S-I+). Crystalline zinc phosphate lamellar phases were obtained a t low synthesis temperatures (4 \"C) and lamellar sulfide phases could be also readily generated a t room temperature. The synthesis procedure presented is relevant to the coorganization of organic and inorganic phases in biomineralization processes, and some of the biomimetic implications are discussed.

Synthesis of mesoporous vanadium silicate molecular sieves

Abstract: Substitution of vanadium into the framework of mesoporous MCM-41 molecular sieves has been achieved; these materials were found to be very efficient catalysts for the selective oxidation of large organic molecules using hydrogen peroxide.

Liquid crystal device with phase retarder having layered inorganic compound

Abstract: A liquid crystal device with a compensator made of a layered inorganic compound sheet or film in which a refractive index in the plane and a refractive index in the thickness direction are different from each other. The layered inorganic compound may be smectite group minerals. The layered inorganic compound has a mean particle size of 500 nm or less. The phase retarder is employed in a liquid crystal device.

Inorganic and organic byproducts of the reactions between chlorite, activated carbon, and phenolic compounds.

Abstract: The effect of phenolic compounds (phenol and p-nitrophenol) on the removal of chlorite in aqueous solution (50 mg/L; pH=7.2; 20 o C) by filtration though granular activated carbon beds (3.0g of CECA 40 activated carbon) was examined. No reaction between chlorite and phenol or p-nitrophenol was observed in the absence of activated carbon. The presence of phenol or p-nitrophenol in solution or preadsorbed on carbon decreased the capacity of activated carbon to remove chlorite. High-performance liquid chromatography, total organic halogen, and gas chromatography/mass spectrometry analyses showed that many organic byproducts such as chlorophenols, p-benzoquinone, dimerization, and carboxylation products were formed on the surface of activated carbon

Modification of an Inorganic-Organic Hybrid Composite: Effect of Ethylamine

Abstract: Changes in the physical properties of a sol-gel derived, poly(tetramethylene oxide)/silica hybrid composite as a function of aging in a strongly basic solution of 70% ethylamide in water were monitored. Characterization of the in situ modified inorganic phase was carried out using mechanical tensile testing, dynamic mechanical spectrometry, thermogravimetric analysis, swelling studies, and small-angle X-ray scattering experiments. It appears that syneresis, followed by ripening of the original polysilicate phase produces a more sharply phase-separated composite. There are significant and systematic changes in the mechanical and damping characteristics associated with the change in morphology. Additionally, the fractal nature of the system is transformed from a mass fractal to a surface fractal as a result of this solution-induced inorganic modification

Selectivity and composition dependence of response of gas-sensitive resistors. Part 1.—Propane–carbon monoxide selectivity of Ba6FexNb10 –xO30(1 ⩽x⩽ 2)

Abstract: A series of tetragonal tungsten bronze structure compounds of formula Ba6FexNb10 –xO30(1 < x < 2) have been made and characterised by X-ray powder diffraction and electron microprobe analysis. The compounds were ostensibly single-phase materials, but since their electrical conductivity did not vary with composition, their structure was interpreted as being Ba6FeNb9O30 with intergrowths of, possibly, BaFe2O4. The gas-sensing behaviour to propane and carbon monoxide was investigated. The compounds were n-type semiconductors, exhibiting a resistance decrease in the presence of ppm levels of the gases in air. Pellets were found to show some selectivity to propane over carbon monoxide which increased with temperature in the range 400–485 °C. The selectivity was shown to be dependent on the porosity of the pellets. There was no systematic variation of either sensitivity or selectivity with stoichiometry, x. Temperature-programmed mass spectrometric experiments showed that the onset of carbon monoxide oxidation occurred at 310 °C over these compounds, while propane combustion started at 420 °C. The propane–carbon monoxide selectivity was interpreted as being due to differences in the combustion kinetics of the two gases which resulted in different gas concentration gradients within the pellet. This was confirmed by using a novel electrode geometry, which enabled the resistance to be measured simultaneously at both the centre and the edge of a pellet.

TaNi2.05Te3, eine Verbindung mit aufgefüllter TaFe1+xTe3-Struktur

Abstract: TaNi2.05Te3, a Novel Telluride with “Stuffed” TaFe1+xTe3 Structure The novel metal-rich layer compound TaNi2.05Te3 was synthesized from the elements. Its structure contains TaNi2Te3 layers which are interconnected by Ni atoms on partially occupied tetragonal-pyramidal sites located between the layers. The title compound and the related telluride TaFe1.14Te3 form a pair of compounds differing only in the occupation or nonoccupation of one 3d-material atom site. Therefore, the structure of TaNi2.05Te3, which is stabilized by interstial Ni atoms, can be regarded as a “stuffed” TaFe1.14Te3 type. Pairs of compounds with a similar structural relationship seem to be of general importance in early transition-metal chalcogenide chemistry. The existence of TaNi2.05Te3 was recently proposed based on the results of extended Huckel band-structure calculations. TaNi2.05Te3 is a metallic conductor according to the results of four-probe resistivity measurements.

Amorphous organic thin film element, amorphous organic polymer compound and amorphous inorganic compound

Abstract: PURPOSE: To provide long life amorphous organic thin film element, amorphous organic polymer compound and amorphous inorganic compound having excellent heat resistance characteristic, optical characteristic and electrical characteristic. CONSTITUTION: A pigment molecule represent by the following general expression (1) or (2) is included. (1) R-[X-Y] n (1) R'-Yn (2). (In above expressions, R designates an aromatic skeleton; R', complex aromatic skeleton; X, a coupling group including ester coupling, amide coupling, urethane coupling, ester carbonate coupling, thionic ester coupling, urea coupling, thionic urea coupling, ether coupling, hydrazone coupling or ester carbamic acid coupling, etc.; Y, a substitution or non-substitution pigment skeleton; and n, an integer 3 or larger. Here, X and Y may be the same in number n or may be different respectively.) COPYRIGHT: (C)1995,JPO

Coating fluid, its production, and coated base material

Abstract: PURPOSE:To form a coating film containing fine inorganic compound particles in the form of monodisperse particles on, e.g. a glass or plastic base material by dispersing or dissolving fine inorganic compound particles or a specified matrix in water or an organic solvent and specifying the ion concentration. CONSTITUTION:A coating fluid prepared by dispersing or dissolving fine inorganic compound particles and/or at least one matrix selected from among partial hydrolyzates of an acetylacetonato chelate, an alkoxysilane and a metal alkoxide in water and/or an organic solvent and adjusting the ion concentration in such a manner that at most 10mmol of ions are present per 100g of the total solid matter of the fluid. This fluid can give a coated base material prepared by forming a coating film on a base material, especially one excellent in antireflection and antistatic properties.

Surface modified composition for inorganic compound and its production

Abstract: PURPOSE:To impart excellent plasticity and durability to an inorganic compound having problems in plasticity and durability as a ceramic raw material by hydrothermal treating an inorganic oxide ceramic raw material with a specific organic compound. CONSTITUTION:A surface modified composition made of the inorganic compound to the surface for which an organic decomposed material is stuck is obtained by hydrothermal treating the inorganic compound and the organic compound, which is decomposable by hydrothermal treating in the presence of the inorganic compound, in a water based atmosphere. An inorganic compound containing oxides of one or more kinds of elements or these hydrates selected from silicon, aluminum, titanium, zirconium, magnesium and the mixture as main structural components is exemplified as the inorganic oxide. As the organic compound, saccharides and these derivatives, amino acids and these derivatives, proteins and hydrophilic synthetic polymers are used.

Orfanic/inorganic complex thin-film electroluminescent element

Abstract: PURPOSE: To provide an organic electroluminescent element that is thermally stable, can hold its emission performance at a predetermined level or higher over a long time, and is excellent in durability. CONSTITUTION: An anode 12 is formed over a substrate 10, an emitter layer 14 is formed over the anode 12, and a carthode 16 is formed over the emitter layer 14. The emitter layer 14 is composed of composite thin films comprising an organic compound 22 uniformly dispersed in an inorganic compound 24, so as to enhance the thermal stability and durability of an element.

High field ESR of the spin-Peierls system CuGeO3

Abstract: Submillimeter wave ESR measurements of single crystal CuGeO 3 , which has recently been found as the first inorganic compound which shows a spin-Peierls transition, have been performed in the frequency region from 90 to 380 GHz using a pulsed magnetic field up to 16T. The temperature dependences of the intensity and the line width in the temperature spin-Peierls system.

Manufacture of multilayer coated reflecting mirror

Abstract: PURPOSE:To provide a reflecting mirror excellent in heat resistance against a high temperature by multilayer-coating a heat-resistant resin backing layer, a bright metal layer, and an inorganic compound protective film layer on a metal substrate as the reflecting mirror used for a high-intensity illumination lamp. CONSTITUTION:The surface of a substrate made of a metal such as Al and used as the reflector of a wide-area lighting system provided with a high- intensity illumination lamp is coated with a heat-resistant resin backing layer constituted of a Si compound expressed by the general formula Si(OR')4 or colloidal silica of 20-200 pts.wt., a Si compound expressed by the general formula RSi(OR')3 of 100 pts.wt., and a Si compound expressed by the general formula R2Si(OR')2 of 0-60 pts.wt. and containing metal compound fine grains such as BaSO4, TiO2 of 5-100 pts.wt. having the average grain size of 10-300nm. A bright metal layer such as Al and an inorganic compound protective film layer such as SiO2 are coated in sequence on the backing layer. A reflecting mirror excellent in heat resistance against a high temperature of 300 deg.C is obtained.

Thermoplastic polyester composition

Abstract: PURPOSE:To provide the composition containing an inorganic compound comprising the thermal reaction product of the fine powder mixture of talc, etc., large in crystallization rate, high in crystallinity, and excellent in crystallizability. CONSTITUTION:A composition comprises (A) a thermoplastic polyester resin preferably having a melting point of 150-300 deg.C (preferably polyethylene terephthalate or polybutylene terephthalate), (B) an inorganic compound and, if necessary, (C) a crystallization-accelerating agent (preferably polyethylene glycol dibenzoate ester). The inorganic compound B comprises the thermal reaction product of the fine powder mixture comtaprising the mixture of M2SiF6 (M is alkali metal) and tale in a weight ratio of 10:90 to 50:50 and, if necessary, an Al compound. The component B includes compounds of formulas O and II (M is Li, Na, K; n is 0.1-1.0; m is 0.05-0.5) as preferable examples.

Separator for solid electrolyte type battery

Abstract: PURPOSE:To control the thermal expansion characteristic, and stabilize the gas sealing by making a separator of a sintered body obtained by baking a predetermined inorganic group compound or the compound, which can compound the predetermined inorganic group compound, in the non-oxidizing atmosphere CONSTITUTION:Nickel group alloy or the mixture of nickel group alloy and at least one kind of nickel, cobalt, cobalt group alloy, iron and iron group alloy are selected At least one kind of inorganic compound selected among alumina, silica, titania, indium oxide, stannic oxide, silica carbide, silica nitride or the compound, which can compound the inorganic compound, is prepared The selected mixture and the compound are baked under the non-oxidizing atmosphere to obtain a sintered body This sintered body has a high degree of minuteness, excellent heat resistance, excellent corrosion resistance, and excellent electrical conductivity, and the injection molding of the sintered body can be performed to reduce a cost Furthermore, the thermal expansion characteristic can be controlled by changing a ratio of the mixture and the compound appropriately, and each member can be joined to each other strongly to improve the stability of gas sealing

Production of vinyl particles having uniform size

Abstract: PURPOSE:To produce polymer particles having particle size uniformized within a specific range, high slipperiness and thermal stability and excellent quality by polymerizing a vinyl monomer together with a phosphorous acid ester and an inorganic compound used as dispersion agents. CONSTITUTION:A vinyl monomer is polymerized in an aqueous medium containing a dispersion agent consisting of fine powder of an inorganic compound and a phosphorous acid ester or a partial ester of phosphoric acid. The produced particles have particle diameters uniformized within the range of 1-100mum. The inorganic compound is e.g. barium carbonate, silica or talc and preferably added in the form of fine powder having particle diameter of 0.01-1mum.

Antibacterial film composition

Abstract: PURPOSE:To provide a film composition having an excellent antibacterial property and capable of forming a film rarely discolored by silver ions by containing an antibacterial agent made of an inorganic compound carrying silver ions and a discoloration preventing agent expressed by the specific general formula. CONSTITUTION:This antibacterial film composition is effectively applied for the construction material and fibers such as an outer wall and a decorative board, various resin moldings such as a bucket and a pot, and the surface treatment of paper in particular, and it contains an antibacterial agent made of an inorganic compound carrying silver ions and a discoloration preventing agent expressed by the general formula, where R is hydrogen or low-grade alkyl group, and R is hydrogen or alkali metal. An inorganic adsorbent such as active carbon and activated alumina or an inorganic ion exchanger such as zeolite and hydroxy apatite is used for the antibacterial agent made of the inorganic compound carrying silver ions, and zirconium phosphate which is an inorganic ion exchanger is preferably used.