68results about How to "Reduced porosity" patented technology

A high-heat conductivity and wear-resistant composite material comprises a main material and an auxiliary material, wherein the main material comprises zirconium corundum fine powder, nanometer aluminum nitride, pure calcium aluminate cement, carbon fiber, magnesium zirconium sand, silica micropowder, aluminum oxide micropowder, sodium tripolyphosphate, silicon carbide, graphene and the like; and the auxiliary material comprises phosphoric acid, ink-grade aluminum hydroxide, aluminum oxide, graphene, a sintering agent and the like. The high-heat conductivity and wear-resistant composite material provided by the invention has high compressive strength, high compactness, very high wear resistance, corrosion resistance and scouring resistance, heat shock stability and high heat conductivity. The high-heat conductivity and wear-resistant composite material is applied to wear-resistant and flame-isolating parts of a circulating fluidized bed boiler and chemical and industrial kilns, and can prolong the service life of wear-resistant layers of the wear-resistant and flame-isolating parts, so that the complex repair times, the maintenance cycle and the maintenance cost are reduced, and thus a requirement on long-cycle safe operation of the high-temperature wear-resistant layer of the circulating fluidized bed boiler is met.

A coalescence media for separation of water-hydrocarbon emulsions comprises an emulsion-contacting sheet formed of: (a) at least one component of the group consisting of natural fibers, cellulose fibers, natural-based fibers, and cellulose-based fibers, at least one component of the group consisting of high-surface-area fibrillated fibers, surface-area-enhancing synthetic material, glass microfibers, and nanoceramic functionalized fibers; and (c) at least one component of the group consisting of a dry strength additive, and a wet strength additive, wherein the fibrous components of the media constitute at least about 70% of the media. In preferred embodiments, the coalescence media comprises kraft fibers, fibrillated lyocell fibers, glass microfibers or nanoceramic functionalized fibers, a wet strength additive, and a dry strength additive. Preferably, the coalescence media is formed as a single, self-supporting layer from a wet-laid process using a homogenously distributed, wet-laid furnish. It may also be formed as a multi-layer structure.

The invention discloses a seashore saline land improver, a preparation method of the seashore saline land improver and a seashore saline land improvement method. The seashore saline land improver comprises the following components in parts by mass: 5-20 parts of industrial waste gypsum, 0.2-1 part of monosodium glutamate waste residue, 30-60 parts of plant waste ground and decomposed material, 0.01-1 part of anionic polyacrylamide and 5-15 parts of bacillus flora. The seashore saline land improver is applicable to seashore saline areas in both north and south China and can rapidly improve the saline land within 50-70 days, and the salinity of the saline land is reduced to a concentration suitable for plant growth. Moreover, the improver has excellent fertilizer maintenance and salinity reduction effects and can achieve the effects of improving the pore structure of soil and reducing the volume weight of soil.

The invention belongs to the field of graphene material synthesis, and particularly relates to a method for preparing a three-dimensional graphene / foamed nickel composite material by taking loofah sponge as a raw material. The method comprises the following specific steps that: after the loofah sponge is cleaned, carrying out carbonization, carrying out natural cooling to the room temperature, and smashing to obtain loofah sponge powder; carrying out purification processing on the foamed nickel; weighing the loofah sponge powder and sodium carbonate powder, after grinding is carried out, dripping polyethylene glycol 400, stirring the mixture into a slurry form, and coating the foamed nickel subjected to purification processing with the slurry to obtain an intermediate product; and puttingthe intermediate product in a high-temperature tube furnace, introducing pure nitrogen, carrying out calcination, after the intermediate product is cooled to the room temperature, carrying out repeated dipping by distilled water until the pH (Potential of Hydrogen) of the solution is neutral, and drying to obtain the three-dimensional graphene / foamed nickel composite material. The invention provides a preparation method for novel biomass three-dimensional porous graphene. The method has the advantages of wide loofah sponge raw material source, low price, simple preparation process technology, environment protection, wide industrial prospect and huge social and economic benefit.

In respect of the object of specifying a filter element which can be used as an inertial separator and, while being of compact construction, can be used in small installation spaces, said filter element displaying a low level of flow resistance, the highest possible dust-holding capacity and the best possible separating-off action, a filter element which is configured in the form of an inertial separator, that is to say has means which separate off particles by deflection of a flow medium, is characterized in that the means comprise, or have, nonwoven fabric.

The invention provides a processing technology for reducing edge crystal holes of a zone-melting POLY back-sealed single-side-polished wafer. POLY back-sealing, thinning and polishing are carried outon an acid corrosion wafer in sequence, and optimal matching is carried out on a cleaning procedure after thinning. Because the thinning procedure is performed after the POLY back sealing procedure, the phenomenon of crystal holes generated in the POLY back sealing process can be greatly reduced. Compared with the prior art, the processing cost is not increased under the same processing steps, thepercent of pass of finished products is greatly increased, and the processing technology has very high practical application value.

The invention discloses a three-dimensional porous composite scaffold and a preparation method thereof. The composite scaffold is prepared by taking 2-10 wt% of silk fibroin solution, hyaluronic acid and sodium alginate as raw materials, wherein the ratio of the hyaluronic acid to the silk fibroin solution is 0.1 g : 5-30 ml, the ratio of mixed solution composed of the silk fibroin solution and the hyaluronic acid to sodium alginate is 15-25 ml : 0.1 g; the solution of the hyaluronic acid and sodium alginate is physically mixed with silk fibroin, and the three-dimensional porous composite scaffold can be obtained after freeze-drying. The obtained scaffold is not favorable for adhesion and proliferation of fibroblasts, but also has good hydrophily and the like, some problems of an existing scaffold material are solved, multiple materials are composited, the advantages of original materials are maintained, and property shortcomings of original materials are overcome. The three-dimensional porous composite scaffold is simple in preparation process, the required cost in the needed raw material ratio is low, and the three-dimensional porous composite scaffold is suitable for mass production.

The invention relates to a high-temperature-resistant anticorrosive smooth coating layer used in stainless steel blade surfaces and a preparation method of the coating layer. The coating layer is prepared by using the following steps: a phosphate and silica sol are adopted as film forming substances, modified orthophosphate or polyphosphate powder is adopted as an anticorrosive filler, mica powder, talc powder and aluminum oxide powder are selected as a high-temperature-resistant filler, particle size distribution of the filler is strictly controlled, surface auxiliary agents such as a wettingdispersing agent and a surface slip agent are added to prepare a coating material, the coating material is sprayed onto the stainless steel blade surfaces, and heating curing is performed to preparethe smooth coating layer. According to the method provided by the invention, the coating layer prepared by the method is resistant to high-temperature corrosion and has an excellent surface finish, and can significantly improve aerodynamic performance of engines when applied to the stainless steel blade surfaces of the aero-engines, thereby improving efficiency of the engines.

The invention belongs to the technical field of fishing net processing, and particularly relates to a high wear-resistant fishing net suitable for a complicated seabed fishing environment. The fishing net is prepared by modifying high density polyethylene by modified nanosilicon dioxide with a surface hydroxy number not higher than 0.4 / nm<2>; the use amount of the high density polyethylene is 74 to 78 percent of the total amount of raw materials of the finishing net. Compared with the prior art, the high wear-resistant fishing net has the following advantages: the high density polyethylene is modified by using the modified nanosilicon dioxide, an interval multipore structure is reduced, processability and mechanical properties are obviously improved, the prepared finishing net is high in strength, good in toughness and strong in impact resistance, and has stronger creep resistance and weather fastness in the complicated seabed environment and environment with strong wind and big waves, and the service life is greatly prolonged in the complicated seabed environment, and is more remarkably prolonged in a simple environment.

The invention discloses a composite coating used for the titanium alloy investment precision casting, a surface coating and a preparation method and application thereof. Preparation materials of the composite coating used for titanium alloy investment precision casting comprise a refractory material, an adhesive, an anti-hydration agent and a regulator, wherein the refractory material comprises yttrium oxide, and the anti-hydration agent is a derivative of a saturated fatty acid. The structural formula of the derivative of the saturated fatty acid is shown in the following formula (1) that R represents an alkyl group, X and Y independently represent a substituent group, wherein the substituent group contains one or more of an alkyl group, a hydroxyl group, a phenyl group or a carboxyl group. The surface coating comprises the composite coating, and further comprises a wetting agent and a defoaming agent. The composite coating used for the titanium alloy investment precision casting andthe surface coating have the advantages of being simple in component, stable in performance, not easy to gel, not easy to dissolve in water, long in service life and low in production cost, and the reaction degree of yttrium oxide ceramic type shell and the titanium alloy prepared by using the coating is small, and the formed alpha adhesion layer is small in thickness.

The invention belongs to the field of inorganic non-metal materials, and discloses a ceramic water permeable brick and a production method thereof. The ceramic water permeable brick is prepared from an aggregate, a binding agent and a combustible raw material; heat generated during a combustion process of the combustible raw material can be used for heating a green brick from inside to outside, and meanwhile, a kiln is used for heating the green brick from outside to inside, so that the uniformity of inner and outer structures of the green brick is increased under the combined action of insideand outside heating, and the performance of the green brick can be more uniform; in addition, the heat efficiency is increased to a large extent. Residue generated after fuel combustion can be used as the aggregate of the ceramic water permeable brick in situ and can be fully utilized, zero emission of fuel residue is realized, and the production cost of the ceramic water permeable brick is saved; in addition, the volume of the combustible raw material is lessened after combustion, larger pore diameter is formed between residue particles, and meanwhile, certain gaps are formed in the residueper se, so that the properties of high strength and good water permeability are given to the ceramic water permeable brick through the special structure. During roasting of the ceramic water permeablebrick, a gradient temperature rising mode is adopted, the combustible raw material can be fully combusted, meanwhile, the green brick can be prevented from being over-combusted, and the quality of the ceramic water permeable brick is ensured.

Provided is a process for preparing a smooth and glossy surfaced paper web. The process comprises subjecting the paper web to shear by using calender rolls driven at different speeds or calender rolls with different diameters. The resulting paper has a totally different structure than the original paper, as it has a much smaller void structure and a much higher degree of bonding between the elements of the sheet. The process is particularly applicable to improving the electrical insulation properties of an aramid paper web.

The invention relates to a refractory material and a preparation method thereof, particularly a multielement high-strength wear-resistant composite paint and a preparation method thereof. The multielement high-strength wear-resistant composite paint is composed of a main material and an auxiliary material, wherein the main material is composed of fused alumina zirconia fine powder, kyanite, pure calcium aluminate cement, aluminium titanate, magnesium zircon sand, silicon micropowder, aluminum oxide micropowder, sodium tripolyphosphate, calcium chromate and gahnite; and the auxiliary material is composed of phosphoric acid, aluminum hydroxide for inks, aluminum chloride, boron-iron-molybdenum alloy, borax and agglutinant. The multielement high-strength wear-resistant composite paint provided by the invention has the advantages of high compressive strength, higher hardness, high Mohs hardness, high density, favorable wear resistance, favorable erosion resistance, favorable scour resistance, high thermal shock stability and high binding property. When being used for a circulating fluid bed boiler, the multielement high-strength wear-resistant composite paint prolongs the service life of the paint coat, reduces the repair frequency and lowers the maintenance cost.

The invention relates to an implant, especially for treating a bone defect. The implant has osteoconductive support bodies and an insertion aid. The insertion aid is designed for insertion of the osteoconductive support bodies into a bone defect and for holding together the osteoconductive support bodies. The invention also relates to a kit.

The invention provides a sound insulation wall for a studio, and belongs to the technical field of sound pollution control. The sound insulation wall for a studio comprises a first wall body and a second wall body, wherein the first wall body and the second wall body are provided with a soundproof module therebetween, the soundproof module includes a first sound absorbing cotton layer, a second sound absorbing cotton layer, and a damping plate disposed between the first sound absorbing cotton layer and the second sound absorbing cotton layer, each of the first sound absorbing cotton layer andthe second sound absorbing cotton layer is provided with a binder on both sides, and each of the first wall and the second wall is sprayed with paint on a side away from the soundproof module. The sound insulation wall has good sound insulation effect, and solves the problem that the sealed sound insulation device is detachably connected, the fixation is not firm, the contact between adjacent components is not tight, and the sound leakage is caused. Meanwhile, the binder for adhesion between the components of the sound insulation wall is additionally provided. The joint strength is excellent and the sound insulation effect is good.