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1371 results about "Composite ceramic" patented technology

Watery acrylic acid insulating mould coating

InactiveCN101519560AImprove friction and scrub resistanceImprove insulation effectFireproof paintsElectricityWeather resistance
The invention relates to a watery acrylic acid insulating mould coating comprising the following components with the parts by weight:10-40 of acrylic acid latex, 12-20 of composite ceramic microballon, 5-15 of fillers, 1-15 of pigment, 0.1-1 of accessory ingredient and 15-35 of water. The watery acrylic acid insulating mould coating takes the watery acrylic acid latex as a carrier and contains a large amount of composite ceramic microballon, thereby enhancing the friction resistance and scrub resistance; a coating film generated by the watery acrylic acid latex has the capacities of heat insulation, heat preservation, water prevention, corrosion resistance and sun protection, thereby the watery acrylic acid insulating mould coating can be widely used for metal roofing materials, building materials, pipeline materials, and the like and can effectively reduce the electricity consumption and enhance the comfort level of work and environment. Besides, the watery acrylic acid insulating mould coating has the advantages of good heat insulation and preservation effects, innocuity, environmental protection, simple construction (the same as the construction technology of common water paint), friction resistance, acid-alkali resistance, water resistance, weather resistance, good dirt resistance, high cohering degree, powerful scrub resistance function and longer service life.
Owner:深圳市方浩实业有限公司

Composite ceramic filter core and preparation method thereof

InactiveCN102924067AGood mesoporous materialHas a hydrophobic surfaceFiltration separationCeramicwareActivated carbonComposite ceramic
The invention relates to a composite ceramic filter core and a preparation method thereof, in particular to a low-temperature sintering and high-strength diatomaceous earth composite ceramic filter core containing multi-walled carbon nanotubes and a preparation method thereof. The composite ceramic filter core comprises, by mass, 60-80% of refined diatomaceous earth, 12-20 parts of activated carbon, 4.5-9 parts of dispersing agent, 2-6 parts of sintering additives, 1-3 parts of antibacterial agents and 0.5-2 parts of carbon nanotubes. According to the low-temperature sintering and high-strength diatomaceous earth composite ceramic filter core containing the carbon nanotubes, due to the fact that the multi-walled carbon nanotubes are evenly distributed in the composite ceramic filter core, mechanical performance of the ceramic filter core can be improved, and the multi-walled carbon nanotubes are of mesoporous structures simultaneously and can perform effective adsorption on remove heavy metal ions in water. In addition, the sintering temperature is reduced to be below 950 DEG C by adding micron-sized metal aluminum powder, natural nano micropores of the diatomaceous earth are reserved, the mechanical strength of the ceramic filter core is further improved, and the compression strength is above 0.5GPa.
Owner:珠海启月生物科技有限公司

Multifunctional photocatalysis composite ceramic separation membrane as well as preparation method and use thereof

The invention belongs to the technical field of membrane and relates to a photocatalytic composite ceramic separation membrane using porous ceramic membrane as a carrier, a method for preparing the same and application of the separation membrane. The method is characterized in that a porous ceramic membrane substrate is used as the carrier to prepare hydroxyapatite sol and argent-titania composite sol through sol-gel technology; and a carrier membrane is subjected to secondary sol-gel dipping, drying and roasting sequentially to obtain the argent-carried titania/hydroxyapatite photocatalytic composite ceramic separation membrane with aperture of between 100 and 1,900 nm and porosity of between 20 and 55 percent. The photocatalytic composite ceramic separation membrane has biological adsorption and high photocatalytic activity and membrane permeability, improves separation of the composite membrane, photocatalytic degradation and sterilization, has remarkable effects of decontamination and sterilization, reduces the loss of porosity in the process of membrane preparation, has a simple preparation and application process, is easy for large-scale industrial production, integrates three units of membrane separation, photocatalytic degradation and sterilization and reduces investment and occupied area.
Owner:DALIAN UNIV OF TECH

Preparation method of high-toughness boride-carbide composite ceramic

A preparation method of a high-toughness boride-carbide composite ceramic relates to a preparation method of a boride-carbide composite ceramic and solves the problems that in the conventional preparation of the boride-carbide composite ceramic, due to high sintering temperature and high sintering pressure, the preparation cost is high and the prepared boride-carbide composite ceramic is poor in mechanical property and fracture toughness. The preparation method of the high-toughness boride-carbide composite ceramic comprises the following steps : adding a dispersing medium into boride and carbide; uniformly mixing the dispersing medium, the boride and the carbide; pressing the mixture into a blank material; and sintering the blank material in a two-section pressure-free sintering way at alow temperature and a high temperature sequentially. The sizes and the distribution of grain crystals in the boride-carbide composite ceramic which is prepared under the low-temperature pressure-freeconditions are uniform; the fracture toughness is as high as 5.0-13MPa.m<-1/2>; and the bending strength is as high as 400-1000 MPa; the boride-carbide composite ceramic with excellent comprehensive mechanical property can be prepared; the preparation cost is reduced; and the application range is widened.
Owner:吉林长玉特陶新材料技术股份有限公司

Preparation method of silicon carbide/zirconium carbide composite ceramic

The invention relates to a preparation method of silicon carbide/zirconium carbide composite ceramic, and relates to inorganic nonmetal material composite ceramic. The preparation method comprises the steps of: dissolving bis(cyclopentadienyl) zirconium dichloride with a solvent under the protection of inert atmosphere, and adding liquid hyperbranched polycarbosilane to obtain a mixture A; and distilling the mixture A under reduced pressure under the protection of inert atmosphere to remove the solvent, and carrying out cracking reaction in inert atmosphere to obtain the silicon carbide/zirconium carbide composite ceramic. According to the invention, bis(cyclopentadienyl) zirconium dichloride is used as a zirconium source, and is used for catalyzing the crosslinking reaction of liquid hyperbranched polycarbosilane, so as to increase ceramic yield; zirconium carbide can inhibit the growth of silicon carbide microcrystal grains, and improve high-temperature resistance and oxidation resistance of the composite material; the zirconium content in the composite ceramic can be controlled by controlling the content of bis(cyclopentadienyl) zirconium dichloride in a hybrid precursor; the liquid hyperbranched polycarbosilane/bis(cyclopentadienyl) zirconium dichloride hybrid precursor is free of oxygen, thus the gas escaped in the high-temperature cracking process is reduced; the ceramic has high compactness; and the preparation method is simple to operate, and is easy for engineering.
Owner:XIAMEN UNIV

Infrared energy-saving coating of high-temperature kiln and preparation method thereof

The invention relates to the field of infrared radiating ceramics materials, in particular to an infrared energy-saving coating of a high-temperature kiln and a preparation method of the infrared energy-saving coating. The infrared energy-saving coating comprises the following raw materials in parts by mass: 10 to 30 parts of infrared radiating filler, 30 to 40 parts of filling material, 20 to 30 parts of silica sol, 8 to 20 parts of assistant and 10 to 15 parts of water, wherein the infrared radiating filler comprises the following raw materials in parts by mass: 10 to 20 parts of iron sesquioxide, 5 to 10 parts of cobalt oxide, 0 to 30 parts of nickel oxide, 20 to 50 parts of manganese dioxide, and 5 to 10 parts of nanoscale lanthanum oxide. The preparation method comprises the steps of mixing raw materials, diffusing, grinding, homogenizing to reach the average grain size of 350 to 500 meshes, filtering, encapsulating to obtain the product. According to the infrared radiating coating prepared by the method provided by the invention, a multi-phase composite ceramics layer is sintered at a lining of an inorganic kiln during heating; and the infrared radiating coating can be used for a long time at higher temperature, the energy consumption can be saved, and the service life of a kiln can be prolonged.
Owner:CHINA SILICON ZIBOCERAMIC TECH

High strength and toughness 3Y-TZP composite ceramic and preparation method thereof

The invention discloses a high strength and toughness 3Y-TZP composite ceramic and a preparation method thereof. The 3Y-TZP composite ceramic consists of 3Y-TZP, a SiC crystal whisker and Sr2Nb2O7; and the preparation method of the 3Y-TZP composite ceramic comprises the steps of preparing and mixing Sr2Nb2O7 powder, ball milling, profiling, degumming and sintering. The composite ceramic is obtained by sintering the SiC crystal whisker and a Sr2Nb2O7 ferroelectric material second-phase addictive which are introduced into the 3Y-TZP. The ceramic material with high strength and toughness can be obtained by adjusting the contents of the SiC crystal whisker and the Sr2Nb2O7 and optimizing a microwave sintering process under the synergistic effect of reinforcing by the SiC crystal whisker and toughening by the Sr2Nb2O7 piezoelectric second phase. The invention has reasonable components and simple preparation process and simultaneously achieves the effects of strengthening and toughening by adopting a synergistic technology of reinforcing by the SiC crystal whisker and toughening by the Sr2Nb2O7 piezoelectric second phase. In addition, the invention is applicable for industrial production, effectively improves the mechanical property of the 3Y-TZP ceramic and widens the application field of the 3Y-TZP ceramic.
Owner:CENT SOUTH UNIV

Preparation of high-temperature floamed ceramic

The invention provides a preparation method of a high temperature foam ceramics, which is characterized in that: zirconium diboride-aluminum oxide composite ceramic powder is prepared into ceramic slurry, polyurethane foaming plastic with certain bore diameter and porosity is soaked into the ceramic slurry so that the ceramic slurry evenly adheres to the surface of the pores of the polyurethane foaming plastic to form a ceramic slurry layer, which are then prepared into a polyurethane foaming plastic ceramic blank, and then are subjected to drying, degreasing and sintering, and the high temperature foam ceramics is prepared. The invention adjusts the high temperature resisting performance of the high temperature foam ceramics prepared by adjusting the ratio of zirconium diboride and aluminum oxide, therefore, the high temperature foam ceramics can resist high temperature and greatly expand working temperature scope; the high temperature foam ceramics prepared by the method can resist high temperature and keep chemical stability under high temperature condition; therefore, in high temperature working environment, the high temperature foam ceramics can be used repeatedly or continuously for the performances of thermal-shock resistance, oxidation resistance, molten steel erosion resistance, and the like, when being used in the filtration of molten steel, showing good performance.
Owner:SHANDONG UNIV OF TECH

Hollow fiber membrane reactor for gaseous oxidation reaction, preparation and application thereof

The invention discloses a hollow fiber membrane reactor for gaseous oxidation reaction, a preparation method and application thereof. The membrane reactor is made of a compact hollow fiber oxygen permeation membrane, wherein the wall thickness of a pipe is between 0.1 and 0.3mm, and the outer pipe diameter is between 1 and 3mm; the oxygen permeation membrane is made of a dual-phase composite ceramic oxygen permeation membrane material which is prepared by mixing an electron conductive phase material and an ion conductive phase material in a volume ratio of 0.43-1.5:1; the electron conductive phase material is provskite-type chromic lanthanum composite oxide (Ln1-xAx)1-zCr1-yByO3 and/or strontium titanate-based composite oxide (LnxSr1-x)1-zTi1-yByO3; and the ion conductive phase material is stabilized fluorite type zirconium dioxide Zr1-x1Rx1O2-delta, or doped cerium dioxide R'z1Ce1-z1O2-delta. The method for preparing the membrane reactor comprises the following steps: mixing the electron conductive phase material and the ion conductive phase material in the volume ratio of 0.43-1.5:1 to prepare a hollow fiber membrane blank by adopting a wet phase inversion method; and sintering the blank at the temperature of between 1,300 and 1,600 DEG C for 10 to 18 hours. The membrane reactor has high oxygen permeation performance, excellent high temperature reduction resistance and long-term stability and low production cost.
Owner:UNIV OF SCI & TECH OF CHINA

Boron carbide base composite ceramic and preparation method thereof

The invention discloses a boron carbide based composite ceramic and a preparation method thereof. The boron carbide based composite ceramic comprises the following compositions by weight percentage: 45 to 50 percent of boron carbide powder, 5 to 8 percent of phenolic resin, and 42 to 50 percent of metallic silicon. After the compositions are weighed, the phenolic resin is dissolved by alcohol first, and the boron carbide powder is added for mechanical ball milling to be mixed evenly; a granulator is used for granulation, and a green body with a shape of the needed product is obtained through compression molding; the compressed green body is placed into a baking oven for drying solidification; the weighed metallic silicon is added into a graphite crucible, the solidified green body is placed on the metallic silicon and is placed into a high-temperature vacuum sintering furnace for sintering along with the crucible, the sintering temperature is between 1,550 and 1,700 DEG C, and the green body is cooled with the furnace after the thermal insulation for 1 to 3 hours to obtain the boron carbide based composite ceramic. The phenolic resin plays a role in an adhesive and a carbon source during the preparation of the composite ceramic, and can also play a role in providing the green body with excessive air holes during the sintering, so that the infiltrability of silicon is improved.
Owner:XI AN JIAOTONG UNIV

Nano Al2O3 and MgO composite ceramic bonded spinel-magnesia fireproof casting material and preparation method thereof

The invention relates to a nano Al2O3 and MgO composite oxide ceramic bonded spinel-magnesia fireproof casting material and a preparation method thereof. Al(OH)3 and Mg(OH)2 composite sol suspension is used as a nano ceramic bond, directly added into a mixture and subjected to in-situ synthesis reaction to form a nano structural matrix using spinel and magnesia as main components so as to form the nano spinel-magnesia fireproof casting material. The mixing materials of the casting material are characterized in that the spinel is used as aggregate or proper amount of sintered magnesia of less than or equal to 5 millimeters is added into the spinel aggregate to improve the total MgO content of the casting material; and the matrix material consists of a nano ceramic bond system, magnesia, little AlO3 with different properties and admixture, wherein after the synthesis reaction of the secondary spinel, the matrix material swells and is densified under constraint so as to cause the improvement of macrostructure and microstructure, improvement of performance and enhancement of durability and form the spinel-magnesia casting material with more excellent corrosion resistance and soakage resistance. The casting material is used in slag lines in integral secondary refining ladles, and obtains good using effect.
Owner:高树森

Composite ceramic mold core for water pump impeller and preparation method thereof

The invention particularly relates to a composite ceramic mold core for a water pump impeller and a preparation method thereof, which belong to the technical field of material machining engineering. The composite ceramic mold core is characterized by comprising the following components in part by mass: 12 to 14 parts of silica sol in which the mass percent of SiO2 is 30 percent, 32 to 36 parts of 280 to 400-mesh refractory material powder, 2 to 4 parts of glass fiber chopped strand with the length of between 3 millimeter and 5 millimeters, 15 to 17 parts of antifoaming agent, 1 to 2 parts of breakdown agent and 1 to 2 parts of grain refiner, wherein the breakdown agent in the raw materials is edible glucose powder. The invention has the advantages that: 1) the stability of a coating is stable, and the high-temperature performance of a prepared mold shell is high; 2) casting defects such as sand holding and the like can be effectively avoided in an impeller casting process; 3) the preparation and service performance of the composite ceramic mold core can be effectively enhanced; 4) a manufacturing process of the mold core is easy, and is convenient to operate; and 5) the high-temperature performance of the mold core is high. After being baked, the composite ceramic mold core has the characteristic of water solubility, and can be removed by water.
Owner:SHANDONG UNIV OF TECH
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