36results about How to "No need for high temperature sintering" patented technology

The invention discloses small fiber balls for a solid buoyancy material and a preparation method of the small fiber balls. The small fiber balls have nuclear shell structures, nucleating carriers are foam balls, and shell layers are powdery fiber reinforced resin matrix composite layers; the small fiber balls with the nuclear shell structures are prepared by adopting the expandable polystyrene foam balls as the nucleating carriers, uniformly coating the surfaces of the expandable polystyrene foam balls with powdery fiber reinforced resin systems, solidifying and washing. The physical performance of the small fiber balls can be conveniently and effectively controlled and improved by changing the foam diameter, the fiber and resin type and the coating thickness according to different environmental usage requirements.

The invention discloses a composite heat insulation type furnace face prefabricated block for an aluminum anode carbon roasting furnace flue wall. The composite heat insulation type furnace face prefabricated block comprises a prefabricated material pouring body which is of a cuboid structure and is provided with a fire jet opening in the middle, bearing nets and heat insulation layers, wherein the bearing nets and the heat insulation layers are sequentially and horizontally embedded into the portions, located on the two sides of the fire jet opening, of the upper portion of the prefabricated material pouring body from top to bottom. L-shaped reinforcing frames are pressed on the edge of the periphery of the upper surface of the prefabricated material pouring body in a buckled manner. The composite heat insulation type furnace face prefabricated block is a composite body composed of refractory castable, the L-shaped reinforcing frames, the bearing nets, the heat insulation layers and other materials, and the requirements for fire resistance, collision prevention, heat insulation performance, load-bearing performance and anti-skidding performance of the furnace face prefabricated block for the flue wall are met; and the refractory castable sintered bauxite with the high strength and high performance is adopted as a host material for the furnace face prefabricated block, so that the finished prefabricated block has high strength, micropores and the medium or high specific gravity and is high in performance. A manufacturing method of the composite heat insulation type furnace face prefabricated block is simple, the process parameters are easy to control, and high-temperature sintering is not needed; and the pouring material formula is changed for different portions, and the field actual requirements of different portions of the prefabricated block are met.

The invention discloses a tetravalent manganese ion doped ammonium salt red light material and a preparation method thereof. (NH4)2TiF6 is taken as the matrix, Mn<4+> is taken as the activator, and the chemical formula of the red light material is (NH4)2TiF6:Mn<4+>. The red light material is prepared by the following steps: placing a (NH4)2TiF6 solid in a container, sequentially dropwise adding a KMnO4 water solution and an HF water solution, adding deionized water, carrying out reactions for 1 to 12 hours under stirring at a room temperature, carrying out suction filtration, and naturally drying. The maximal excitation wavelength of the red light material is in the 467 nm blue light area, the red light material can be excited by a GaN blue light chip and emits a red tetravalent manganese characteristic emission peak, the emission spectrum is in a range of 600 to 650 nm; the material can supply red lights to white light LED so as to increase the color rendering index of white light LED; the material does not contain any rare earth, no high temperature sintering is needed in the preparation method , and the method is suitable for industrial production.

The invention discloses a preparing method for high-strength light multihole construction waste composite, which comprises the following steps: 1) smashing and sieving construction waste to acquire construction waste powder, adding water for mixing, using absolute ethyl alcohol to dilute silane coupling agent, dropwise adding the diluent to coal ash, mixing evenly, and drying for standby application; 2) dissolving epoxy resin into acetone, sequentially adding fillers including phenolic resin, stearic acid, fiber and silicone oil, mixing evenly, adding a curing agent, adding the construction waste powder step by step, and using acetone to adjust viscosity of a sizing agent so as to acquire a forming sizing agent of the construction waste composite; 3) pouring the forming sizing agent of the construction waste composite into a steel die, rising temperature, pressurizing and forming to acquire the construction waste composite. The composite adopts a multihole structure, the density is less than that of water, and the compressive strength and flexural strength are high than those of common bricks. The composite has excellent water resistance, water permeability and gas permeability, and can be used in fields, such as quake prevention of buildings, cover plates of drainage channels at towns and cities, and surface hardening of landslide zones.

The invention discloses a preparation method of nano petaline Ni(OH)2. The method comprises the steps of taking nickel sulfate and urea as materials, preparing mixed solution of which the molar ratio of nickel to urea is 1:1 to 1:6 and then transferring the mixed solution to a 200mL of self-pressure lining polytetrafluoroethylene stainless steel reaction kettle, wherein the loading degree of a hydrothermal reaction kettle can be up to 80%; covering an inner cover and an outer cover to feed to an electric heating constant-temperature tank, heating the solution to 170 DEG C, reacting for 2-20 hours at constant temperature, then naturally cooling the solution to room temperature, filtering and washing the solution into a neutral state by deionized water; drying the solution into constant weight at 80 DEG C, and thinning the petals to prepare the nano petaline Ni(OH)2. According to the preparation method, the urea is taken as a precipitator, and a nano petaline Ni(OH)2 microsphere is directly prepared by hydrothermal syntheses; the method is simple in process, low in cost and easy to control without high-temperature sintering or a template agent, the obtained product crystal particle has the advantages that the size is uniform; the particle purity is high; the dispersity is good, and the crystalline form is good and controllable.

The invention discloses a fluorine titanium salt red light material for a white LED with two primary colors and a preparation method of the material. The chemical composition of the material is Bati(1-x)F6: xMn <4+>, wherein x ranges from 0.25% to 2.5%. The preparation method comprises the steps as follows: tetrabutyl titanate or TiO2 is taken as a titanium source, BaF2 is taken as a barium source, KMnO4 is taken as an active ion manganese source, an HF aqueous solution with the concentration ranging from 4% to 10% is taken as a medium or a fluorinating agent, a reaction is performed for 3-12 hours at the temperature ranging from the room temperature to 180 DEG C, then suction filtration and drying are performed, and white powder is obtained. The product emits bright red light under an ultraviolet lamp, the maximum excitation band of the product is matched with blue light emitted by a GaN blue light chip completely, and the emission spectrum is located in a red zone. The material can be applied to the white LED with two primary colors to improve the CRI (color rendering index) of the LED. The product has uniform and slight particles, contains no rare earth, has a simple preparation method and is suitable for industrial production.

The invention relates to the ternary compound magneto-electric material by use of the organic macromolecule as the agglomerant as well as its preparation method.With the organic macromolecule being as the agglomerant the piezoelectric ceramic(such as lead zirconate titanate etc.)and the magnetostriction material(such as terbium-dysprosium-iron alloy)are taken shape by hot pressing at low temperature.The magneto-electric compound material can be made by the method.Comparing the prior art,the invention possesses the advantages of simple process,good mechanical characters of the material and high magneto-electric transformation factor.The hotpressing technique provides the features of low pressing temperature(about 120-200 deg.C),easy to change the magneto-electric characters by changing the sequence for adding the constituent and the relative content.

The invention provides a self-enhanced ceramic cold glaze and a preparation method thereof. The cold glaze is prepared by the following steps: preparing the following raw materials: phosphate / polyphosphates, meta-kaolin, silicon dioxide, zinc oxide, sodium silicate, an alkaline compound, and water, mixing raw materials according to a certain ratio, evenly stirring the mixture by a mechanical stirrer to form slurry, evenly painting the slurry on a blank, which needs to be decorated, and drying the blank at a room temperature or low temperature (40 to 100 DEG C). The glaze, which is obtained by the provided formula and preparation method, can be used to repair the glaze of blanks made of various porcelains. The glaze and the blank interface are well combined together. The glaze has excellent mechanical properties, the compressive strength can reach 150 MPa or more, the surface of the glaze is smooth, the color is white-grey and transparent, no defect exist on the surface, and the market needs can be met. Compared with the conventional glaze production technology, the provided preparation method has the advantages of simple technology, energy saving, environment-friendliness, low cost, and easy operation.

The invention discloses a tetravalent manganese ion-doped barium fluoroscandate red light material and a preparation method thereof. The material is Ba 3 sc 2 f 12 as matrix, with Mn 4+ As an activator, the chemical composition is Ba 3 sc 2 f 12 :Mn 4+ . The preparation method is as follows: with Sc 2 o 3 Scandium source, Ba(NO 3 ) 2 as barium source, with K 2 MnF 6 In order to activate ion manganese source, HF aqueous solution is used as medium and fluorinating agent. During preparation, the Sc 2 o 3 The solid was placed in a container, and then HF aqueous solution, Ba(NO 3 ) 2 and K 2 MnF 6 , react at room temperature to 180 degrees for 1 to 12 hours, filter with suction, and dry naturally to obtain the product. The material may be applied to dichroic white LEDs to improve the color rendering index of white LEDs. The product does not contain rare earth, has a simple preparation method, does not need high-temperature sintering, and is suitable for industrial production.

The invention discloses a geopolymer-polymer composite board and a preparation method thereof. The geopolymer-polymer composite board comprises the following components in parts by weight: 12-18 parts of resin adhesive liquid, 59-66 parts of concentrated alkali liquid, 30-40 parts of building rubbish, 30-40 parts of fly ash, 30-40 parts of cement, 0.5-1 part of glass fibers and 3-5 parts of interface intensifiers. The method comprises the following steps of (1) crushing and screening of the building rubbish and the fly ash; (2) blending a geopolymer-polymer composite material: dissolving resin into benzyl alcohol, adding ethylene diamine to form the resin adhesive liquid, preparing the concentrated alkali liquid, gradually adding the building rubbish and the fly ash to the concentrated alkali liquid, continuously stirring, and sequentially adding the cement, the glass fibers, the interface intensifiers and the resin adhesive liquid at the same time to obtain the geopolymer-polymer composite material; (3) forming the geopolymer-polymer composite board: pouring the geopolymer-polymer composite material into a mould, then transferring the mould into a drying box for drying, cooling, and then taking out a product. The geopolymer-polymer composite board disclosed by the invention has the advantages of high compressive strength, good water resistance, simple forming process, low energy consumption and suitability for popularization and application.