11results about How to "Improved thermal shock stability" patented technology

The method comprises the following steps that S1, dry materials and a binding agent are provided, and the dry materials comprise 19 wt%-24 wt% of intaglio corundum with the particle size being 3-5 mm, 22 wt%-35 wt% of intaglio corundum with the particle size being 1-3 mm, 12 wt%-19 wt% of white corundum with the particle size being 0-1 mm, 18 wt%-24 wt% of white corundum fine powder with the particle size being smaller than 200 meshes and 2 wt%-4 wt% of composite metal powder; s2, the dry material and a binding agent are mixed and ground, and a mixed and ground material is obtained; and S3, molding and drying the mixed and ground material to obtain the fire-resistant heat-insulating brick. The refractory brick produced by adopting the inked corundum and the white corundum as main raw materials, adding the composite metal powder and adding the additional binding agent has the advantages of high strength, good thermal shock resistance, good permeability resistance, good erosion resistance and long service life, and can be widely applied to rotary kilns, cement kilns and other parts.

The invention discloses a composite fireproof heat insulation pad for a battery pack and a preparation method thereof, and belongs to the technical field of battery safety. The heat insulation pad is of a double-layer composite structure, the inner layer is a high-silicon-dioxide glass fiber needled felt heat insulation core layer, and the outer layer is a ceramic silica gel glass fiber cloth fireproof coating layer. The two layers are sewn into a whole through high-temperature-resistant sewing threads, and a back adhesive layer is arranged on one side of the two layers. The product provided by the invention has excellent fire resistance (can tolerate flame at 1000 DEG C for 30 minutes), excellent heat insulation, excellent flexibility and thermal shock resistance, and is convenient to install. The preparation process is simple, can be completed through cutting, wrapping and sewing and gum application, and is suitable for large-scale production. The product can effectively delay or prevent heat spreading in the battery pack, and the battery safety level of the new energy automobile is remarkably improved.

The invention discloses high-purity heat-resistant quartz ceramic and a preparation method and application thereof, and belongs to the technical field of inorganic non-metallic materials, the high-purity heat-resistant quartz ceramic comprises the following raw materials by mass fraction: 50-80% of a fused high-purity quartz raw material, 10-50% of fused high-purity quartz fine powder, 0.1-1% of a composite mineralizer, and 0.1-5% of a binder; the content of CaO in the high-purity heat-resistant quartz ceramic is less than or equal to 0.1%. The aspects of raw material deep processing, additives, the preparation process and the like are strictly controlled, the addition of calcium-containing substances is avoided, the eutectic point phase is fundamentally reduced, the alkali corrosion resistance and the high-temperature strength are further improved, and the finally obtained quartz ceramic has the advantages of high refractoriness under load, excellent thermal shock resistance and corrosion resistance, and the service life of the quartz ceramic is prolonged. The method is suitable for severe environments such as oxy-fuel combustion glass kilns.

This invention relates to the field of refractory material production technology, specifically to the preparation of nitride-bonded corundum-silicon carbide composite materials. The mixture comprises 50-80 wt% silicon carbide particles, 5-20 wt% corundum particles, 5-20 wt% silicon powder, 2-12 wt% silica micropowder, 2-5 wt% additives, and 1-2 wt% water or alcohol. The corundum particles consist of two different particle sizes: 0-1 mm and 1-3 mm, with contents of 3-8 wt% and 5-15 wt%, respectively. The silicon carbide particles consist of three different particle sizes: 1.5-2.5 mm, 0.5-1.5 mm, and 0-0.5 mm, with contents of 10-15 wt%, 25-35 wt%, and 10-15 wt%, respectively. A fine mixed powder is obtained by mixing the silica micropowder, silicon powder, and silica powder. The mixture is then loaded into a mold and formed by friction vibration. After drying, it undergoes nitriding treatment. The silica powder and silica micropowder in the blank undergo a co-nitriding reaction to generate silicon nitride and silicon oxynitride. The mixture is then cooled to room temperature in a furnace to obtain a nitride-bonded corundum-silicon carbide composite material. The process is simple and the production cost is low. Its products have excellent high temperature resistance and thermal shock resistance, which are significantly better than those of traditional silicon nitride-bonded silicon carbide materials.

The invention discloses a production process for blue glass, and relates to the technical field of blue glass production. The process comprises the following steps: S1, raw material pretreatment: respectively grinding and drying a basic glass raw material, a coloring agent and a functional additive, and then mixing in sequence; s2, melting the mixture in a primary melting furnace in a reducing atmosphere, and adding a reducing agent; s3, transferring the primarily molten glass liquid into a main furnace, and stirring and clarifying in a nitrogen-oxygen mixed protective gas environment; s4, cooling the clarified glass liquid, and continuously stirring and homogenizing; according to the preparation method, the basic raw materials, the coloring agent and the functional additive are accurately proportioned, and control steps of staged mixing, reducing atmosphere melting, multi-stage clarification and homogenization, float forming and the like are combined, so that synergistic improvement of high optical purity and excellent mechanical performance is realized. In the process, the purity, the granularity, the charging sequence and the thermal regulation of the raw materials are strictly controlled, so that the component uniformity and the product consistency are guaranteed.

The invention relates to the technical field of ceramic metallization, in particular to a metallization process of a ceramic material, which comprises the following steps: reacting chitosan with glycidyl methacrylate to obtain a water-soluble vinyl chitosan derivative; the preparation method comprises the following steps: adding a vinyl chitosan derivative, soluble metal salt and a water-based photoinitiator into water to prepare impregnation liquid; impregnating the ceramic material in the impregnation liquid, and curing under ultraviolet light; maintaining ultraviolet light for heat treatment; according to the metallization technology, the tensile strength and the thermal shock resistance of the ceramic metallization layer are remarkably improved, operation is easy, generated waste liquid is little, and the metallization technology is more environmentally friendly.

The application discloses a nitrogen-oxygen composite rare earth ceramic riser base and a preparation process thereof, and relates to the technical field of coke oven riser. The riser base comprises a base and a riser cylinder, the riser cylinder is fixedly arranged on the upper portion of the base, and the riser cylinder and the base are both circular in cross section and concentrically arranged. The base comprises the following components in parts by weight: 40-50 parts by weight of silicon carbide powder, 12-13 parts by weight of industrial silicon powder, 8-10 parts by weight of silicon micro powder, 2-3 parts by weight of additives and 33-36 parts by weight of a binding agent. A decoking assembly for cleaning graphite and tar attached to the inner wall of the base is arranged in the base. The preparation process comprises the following steps: S1, mixing; S2, forming; S3, sintering; and S4, installation. The application selects high-purity silicon carbide as the main raw material, guarantees excellent thermal shock stability of the product, adds rare earth oxides to improve the toughness of the riser base material, and further improves the wear resistance and oxidation resistance of the riser base.

The application relates to the technical field of composite film materials, and particularly discloses a bifunctional composite carrier as well as a preparation method and application thereof. 1‑a X a The ceramic material is selected from at least one of Al2O3, ZrO2, YSZ, TiO2, SiC or MoSi2. The bifunctional composite carrier provided by the application has structural support strength and high-efficiency heating performance, effectively making up the blank in the prior art that no ideal support body material is used in the field of Joule heat and has excellent electric conductivity to realize rapid and uniform heating, a suitable pore structure to ensure low-resistance mass transfer, and excellent mechanical strength and stability at high temperatures.

This invention belongs to the field of refractory materials technology, and relates to a high-strength nano-polycrystalline spraying material for non-ferrous metal smelting furnaces and its preparation method. The high-strength nano-polycrystalline spraying material comprises the following raw materials in parts by weight: 30-45 parts high-purity fused magnesia, 15-20 parts fused magnesia-chromium sand, 5-7 parts fused chromium corundum, 10-20 parts polycrystalline nano-magnesium oxide, 3-5 parts CA-80 type calcium aluminate cement, 3-5 parts silica sol, 8-15 parts chromium oxide micropowder, and 2-3 parts sodium carboxymethyl cellulose. After spraying onto copper smelting anode furnaces (Kaldor furnaces), the corrosion resistance, thermal shock stability, and service life are improved.

The application discloses a surface coating of an induction coil of a medium-frequency welding machine and a preparation method thereof. The surface coating comprises a transition layer and a surface layer. The transition layer is composed of nickel-aluminum, aluminum oxide and coated powder in a weight ratio of 85-90:5-8:5-10. The surface layer is composed of aluminum oxide and potassium silicate in a weight ratio of 94-98:2-6. The coated powder is formed by coating zirconium diboride with calcium fluoride. The thickness of the transition layer is 30-150 microns. The thickness of the surface layer is 200-500 microns. The prepared coating has good bonding strength and insulation performance, and the preparation method is simple and efficient, and is suitable for various industrial applications.

This invention discloses a low-carbon magnesia-carbon brick and its preparation method. The low-carbon magnesia-carbon brick is composed of the following components in parts by weight: 40-50 parts by weight of resin-impregnated magnesia aggregate, 45-55 parts by weight of unimpregnated magnesia, 2-4 parts by weight of graphite, 0.5-2.0 parts by weight of nano-carbon black, 1-3 parts by weight of composite antioxidant, and 2.5-4.0 parts by weight of phenolic resin. The preparation method is as follows: unimpregnated magnesia fine powder, nano-carbon black, and composite antioxidant are mixed to obtain mixed raw material A. The resin-impregnated magnesia aggregate, unimpregnated magnesia aggregate, phenolic resin, graphite, and mixed raw material A are added to a mixer in sequence, mixed, pressed into shape, and finally heat-treated. The low-carbon magnesia-carbon brick of this invention significantly improves the thermal shock stability and slag erosion resistance of the material while effectively reducing the carbon content.