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216results about How to "Lower sintering temperature" patented technology

Gravel-shaped attapulgite fireproof ceramsite

The invention discloses a gravel-shaped attapulgite fireproof ceramsite. The key points of the technical scheme are as follows: the gravel-shaped attapulgite fireproof ceramsite is composed of high-viscosity attapulgite clay powder, attapulgite clay tailing powder, granulated blast furnace slag powder, iron tailing powder, coal gangue powder, bauxite tailing powder and diatomite tailing powder. After ingredients of the gravel-shaped attapulgite fireproof ceramsite are mixed, granulated, baked, cooled, crushed and screened, the obtained product is packaged to obtain the gravel-shaped attapulgite fireproof ceramsite. The gravel-shaped attapulgite fireproof ceramsite is a grain with an irregular shape and the grain is internally provided with a plurality of small air holes; and the gravel-shaped attapulgite fireproof ceramsite is the fireproof ceramsite which has the advantages of light weight, strong compressive strength, low coefficient of heat conductivity, high refractoriness, stablechemical performance, and good corrosion resistance and heat-preservation and sound-proof effects. The gravel-shaped attapulgite fireproof ceramsite can be produced by comprehensively utilizing a plurality of types of the tailings, so that the gravel-shaped attapulgite fireproof ceramsite is good for improving the resource utilization rate, changing wastes to valuable things, and protecting the environment; and the gravel-shaped attapulgite fireproof ceramsite is applicable to producing fireproof ceramsite concrete and heat-preservation and sound-proof materials.
Owner:NANGTONG HAODI ANTICORROSION EQUIP

Sintered composite soft magnetic material and method for preparing same

The invention relates to a sintered composite soft magnetic material and a method for preparing the same. The material comprises a metal soft magnetic material, a soft magnetic ferrite and a low-melting-point soft magnetic alloy, wherein the metal soft magnetic material is formed by at least one of an Fe-Ni system, an Fe-Co system, an Fe-Co-V system, an Fe-Al system and an Fe-Al-Me system (Me is one or more than two of Co, Cr and Mo), the soft magnetic ferrite is formed by at least one of an Mn-Zn system, an Ni-Zn-based, an Li-Zn system and a Cu-Zn system, and the low-melting-point soft magnetic alloy is an Re-Fe-M system alloy (Re comprises one or more of 17 rare earth elements including Sc and Y, and M is one or more of metal elements including B, Al, Si, Ti, V, Cr, Mn, Co, Cu, Mo, Ni, Zn, Ga, Nb, Ta and W). The method for preparing the soft magnetic material formed by the components has the advantages that cold pressing and then sintering or hot pressing or spark plasma sintering are selected, and the soft magnetic material not only overcomes the low resistivity of the metal soft magnetic material and the low magnetic induction of the ferrite, but also maintains the excellent performance of the metal soft magnetic material and the soft magnetic ferrite.
Owner:GRIREM ADVANCED MATERIALS CO LTD

Method for preparing polycrystalline cubic boron nitride

ActiveCN101560624ARelieve pressureLower sintering temperatureRevolutions per minuteBall mill
The invention discloses a method for preparing polycrystalline cubic boron nitride, which comprises the following steps: using cubic boron nitride and a bonding agent as raw materials, mixing the cubic boron nitride and the bonding agent and then ball-milling the mixture, wherein the ball material ratio during the ball milling is (1-4):1, the rotating speed is between 400 and 800 revolutions per minute, and the ball milling time is between 4 and 20 hours; drying the mixed mixture after the ball milling, adding an organic binder into the mixture after drying, mixing the mixture evenly, and screening the mixture through a 100-mesh screen; performing cold compression and forming with the pressure of between 0.8 and 2 GPa; and sintering the formed green body at a sintering temperature of between 1,000 and 1,300 DEG C, and keeping the temperature for 4 to 20 hours so that the finished product is obtained after the sintering. The polycrystalline cubic boron nitride PcBN prepared by the method is gray and is a compact block which has the superior performances of high hardness, high grinding efficiency, good impact resistance toughness, easy conditioning, good grinding quality and the like. The method has the advantages of simple equipment, easily-controlled operation, low cost and easy large-scale production, has favorable social value and economic value, and is easy to popularize and apply.
Owner:FUNIK ULTRAHARD MATERIAL +1

Cylindrical attapulgite construction waste ceramsite

The invention discloses a cylindrical attapulgite construction waste ceramsite. The key point of the technical scheme is as follows: the cylindrical attapulgite construction waste ceramsite comprises high viscosity attapulgite clay powder, attapulgite clay tailing powder, construction waste powder, red bentonite powder, diatomite tailing powder and wood chip powder. The ingredients of the cylindrical attapulgite construction waste ceramsite are mixed, granulated, roasted, cooled, screened and packaged to obtain the cylindrical attapulgite construction waste ceramsite. The cylindrical attapulgite construction waste ceramsite is of cylindrical shape, has rough and hard surface and has a lot of fine pores in the interior; and the spherical attapulgite refractory ceramsite is a construction ceramsite with light weight, high strength, low thermal conductivity, high refractoriness, stable chemical property, durability and good heat insulation and sound insulation effect. The comprehensive utilization of construction wastes and tailings in producing the cylindrical attapulgite construction waste ceramsite is beneficial for increasing the resource utilization rate, turning waste into wealth and protecting the environment; and the cylindrical attapulgite construction waste ceramsite disclosed by the invention is suitable for producing ceramsite concrete as well as heat insulation and sound insulation materials.
Owner:南通通州江华纺织有限公司

Microwave dielectric ceramic LiMg2V3O10 allowing low-temperature sintering and preparation method thereof

The invention discloses microwave dielectric ceramic LiMg2V3O10 allowing low-temperature sintering and a preparation method of the microwave dielectric ceramic LiMg2V3O10. The preparation method includes the steps that (1), Li2CO3 original powder, MgO original powder and V2O5 original powder are weighed and proportioned according to components of LiMg2V3O10, wherein the purity of the original powder is over 99.9%; (2), wet-type ball milling is performed on the raw material in the step1 for 12 hours with distilled water being ball milling media and pre-sintered for 6 hours in the atmosphere at 750 DEG C after drying; (3), binding agents are added into powder obtained in the step2, granulation is performed, then, compression forming is performed, and finally sintering is performed for 4 hours in the atmosphere at 800 DEG C-830 DEG C, wherein polyvinyl alcohol solutions with the 5% concentricity are adopted as the binding agents, and the additive amount of polyvinyl alcohol accounts for 3% of the total mass of the powder. According to the prepared ceramic, sintering is good at 800 DEG C-830 DEG C, the dielectric constant reaches 12-13, the quality factor (Qf) value is up to 75000 GHz-89000 GHz, the temperature coefficient of resonance frequency is small, and the microwave dielectric ceramic has great application value in the industry.
Owner:SHANDONG XINGQIANG CHEM IND TECH RES INST CO LTD

Low-dielectric-constant microwave dielectric ceramic CaLi3NdV8O24 and preparation method thereof

The invention discloses high-quality-factor temperature-stable low-dielectric-constant microwave dielectric ceramic CaLi3NdV8O24 capable of being sintered at low temperature, and a preparation method thereof. The preparation method comprises the following steps: (1) weighing and burdening original powder, having the purity over 99.9% (by weight), of CaCO3, Li2CO3, Nd2O3 and V2O5 according to the constitution of CaLi3NdV8O24; (2) carrying out wet ball-grinding and mixing on the raw materials in the step (1) for 12 hours, wherein a ball grinding medium is distilled water, drying and then pre-sintering for 6 hours at an air atmosphere at 700 DEG C; (3) adding a binder to the powder obtained in the step (2), granulating, then carrying out compression moulding, and finally sintering for 4 hours at an air atmosphere of 750-800 DEG C; a polyvinyl alcohol solution having the mass concentration of 5% is adopted as the binder, and the addition amount of the polyvinyl alcohol accounts for 3% of the total mass of the powder. The ceramic prepared by using the preparation method can be favorably sintered below 800 DEG C, wherein the dielectric constant reaches 20.6-21.4, the quality factor QF is up to 91000-126000GHz, and the temperature coefficient of resonance frequency is low; the microwave dielectric ceramic CaLi3NdV8O24 has a great application value in the industry.
Owner:GUILIN UNIVERSITY OF TECHNOLOGY
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