69 results about "Nepheline" patented technology

The invention discloses a ceramic rock plate with a decorative effect and a production process thereof, and belongs to the technical field of ceramics. The rock plate is composed of a green body layer, a ground glaze layer, a cover glaze layer and an ink jet pattern layer, and after firing, a micro-nano rough and low-surface-energy synergistic protection layer is formed through oxygen-nitrogen plasma activation, a hydrothermal reaction of aluminum salt and an ammonia source compound, high-temperature calcination and silane derivative dipping and curing. The green body takes wollastonite, quartz sand and the like as raw materials, and the ground glaze and the cover glaze adopt a feldspar-quartz-nepheline system; after firing, performing plasma treatment and hydrothermal treatment to generate needle-shaped aluminum oxide, and introducing a silane derivative to realize double functions of super-hydrophobicity and wear resistance. Compared with the prior art, the anti-fouling and wear-resistant coating reaches the national standard 5 level, the process is simple, and the coating can be directly connected to an existing production line and is suitable for high-end wall floor decoration.

The invention provides a hierarchical porous silicon material and a preparation method thereof, and belongs to the technical field of comprehensive utilization of fly ash. The preparation method of the hierarchical porous silicon material provided by the invention comprises the following steps: mixing fly ash and an activating agent, and calcining to obtain activated fly ash; the activating agent comprises at least one of sodium salt and potassium salt; and mixing the activated fly ash with hydrochloric acid, and carrying out acid etching to obtain the hierarchical porous silicon material. According to the invention, at least one of sodium salt and potassium salt is adopted to activate the fly ash, and at least one of Na < + > and K < + > in the activation process can promote the conversion of mullite in the fly ash to different mineral phase aluminosilicate, so that a nepheline structure of Na and / or K is formed; and then hydrochloric acid is adopted for acid etching, and the alumina component can be selectively etched, so that the hierarchical pore channel is constructed, the process is simplified, and template-free preparation of the hierarchical pore silicon material is realized.

The invention belongs to the technical field of ceramic ink, and particularly discloses crystal change ink, a preparation method thereof and a ceramic rock plate. The crystal-changing ink comprises the following raw material components: crystal-changing glaze, an inorganic active agent and an ink auxiliary agent, wherein the inorganic active agent is selected from at least one of nano titanium dioxide, nano zinc oxide and nano aluminum oxide; the crystal-changing glaze is prepared from the following raw material components in parts by weight: 5 to 15 parts of halloysite, 20 to 30 parts of nepheline, 10 to 25 parts of feldspar, 3 to 8 parts of hydromica, 5 to 15 parts of wollastonite, 15 to 30 parts of quartz, 10 to 20 parts of calcium carbonate and 2 to 7 parts of zinc oxide. All the raw materials in the crystal-changing glaze are subjected to chemical reaction and physical change in the high-temperature firing process to form a stable crystal structure; the inorganic active agent further promotes the growth of crystals while improving the stability, adhesive force and optical performance of the ink, and the glaze surface generates unique texture and color changes under the combined action of the inorganic active agent and the ink.

The invention discloses a dark golden velvet texture ceramic rock plate, base glaze and a preparation method of the dark golden velvet texture ceramic rock plate, the dark golden velvet texture ceramic rock plate is prepared from golden velvet base glaze materials, water, carboxymethyl cellulose and sodium tripolyphosphate according to the mass ratio of 100: 36: (0.1-0.2): (0.3-0.5) through mixing and ball milling; the gold velvet base glaze is prepared from the following components in parts by weight: 3-8 parts of wollastonite, 5-10 parts of dolomite, 10-15 parts of strontium carbonate, 2-5 parts of calcined talc, 30-40 parts of potassium feldspar, 5-10 parts of nepheline, 5-10 parts of calcined kaolin, 5-15 parts of quartz, 1-5 parts of white corundum, 3-8 parts of calcined zinc oxide and 10-15 parts of matte transparent frit; the matte transparent frit comprises the following components in percentage by mass: 55%-60% of SiO2, 12%-15% of AL2O3, 2%-3% of K2O, 3%-4% of Na2O and 20%-25% of CaO, and the burning vector of the matte transparent frit is 1%-5%. According to the scheme, the light transmittance of a glaze layer is improved, the transparency is improved, meanwhile, the surface gloss can be kept to be uniformly dispersed and is not clear, and the glaze touch feeling is soft like velvet.

The invention relates to the technical field of coatings, in particular to a stone-like fluorocarbon coating and a preparation method thereof. The stone-like fluorocarbon coating is prepared from the following components in parts by mass: 35 to 50 parts of fluorocarbon resin, 10 to 20 parts of nepheline powder, 5 to 15 parts of potassium aluminum silicate, 3 to 8 parts of rutile titanium dioxide, 1 to 5 parts of inorganic color paste, 0.5 to 2 parts of silane coupling agent, 0.3 to 1.5 parts of polyamide wax anti-settling agent, 0.5 to 2 parts of fumed silica, 0.1 to 0.8 part of organic silicon flatting agent and 0.2 to 1 part of modified hydrogenated castor oil. 5-12 parts of an aliphatic isocyanate curing agent and 10-20 parts of a mixed solvent. The stone-like fluorocarbon coating is excellent in weather resistance, can effectively resist the influence of environmental factors such as ultraviolet rays, acid rain and temperature change, remarkably reduces the probability of occurrence of phenomena such as color fading, pulverization and peeling, prolongs the service life of the coating, and ensures a long-term stable decorative effect.

The invention discloses a novel method for preparing a TS-1 zeolite molecular sieve from fly ash, which comprises the following steps: mixing and grinding fly ash and anhydrous sodium carbonate (Na2CO3) according to a certain proportion, and roasting for a certain time to obtain nepheline (NaAlSiO4); the preparation method comprises the following steps: mixing nepheline with hydrochloric acid (HCl) with a certain concentration according to a certain solid-to-liquid ratio, stirring for a certain time, and then filtering, washing, drying and grinding to obtain SiO2 powder; the method comprises the following steps: weighing a certain mass of SiO2, tetrapropylammonium hydroxide (TPAOH) and deionized water according to a molar ratio of SiO2: TPAOH: H2O of 1: 0.4: 50 at normal temperature, mixing and stirring to obtain a solution A, slowly melting a certain mass of tetrabutyl titanate into isopropanol to obtain a solution B, adding the solution B into the solution A to obtain a solution C, heating and stirring the solution C at 80-90 DEG C for 1 hour, putting the solution C into a crystallization reaction kettle, and carrying out crystallization for 2-3 hours at the temperature of 80-90 DEG C; crystallizing for a period of time at a certain temperature; after the crystallization is completed, filtering, washing and drying to obtain the TS-1 molecular sieve. The novel method for preparing the TS-1 zeolite molecular sieve from the fly ash is simple and safe to operate and relatively low in cost, and has the characteristics of small crystal grains and multiple mesopores. Meanwhile, industrial solid waste can be utilized, the production cost is reduced, a new method is provided for comprehensive utilization of the fly ash, the additional value of the fly ash is improved, and the method has very important practical significance on actual industrial production.

The invention discloses daily high-strength environment-friendly ceramic and a preparation process thereof, and belongs to the technical field of ceramic preparation. By optimizing the raw material ratio and introducing the composite nano material and the novel grinding aid, the comprehensive mechanical properties of the ceramic product are effectively improved on the basis of ensuring the green and environment-friendly effects of the product; the selected raw materials are nepheline syenite, baddeleyite and other natural minerals, so that the utilized resources are sustainable, the environmental pollution is reduced, and the compactness and mechanical properties of the ceramic material are improved.

This invention provides a method for activating and extracting potassium from potassium feldspar, the method comprising the following steps: (1) ball milling potassium feldspar raw material to obtain pre-activated potassium feldspar powder; the pre-activated potassium feldspar powder is in a near-amorphous state; (2) mixing the pre-activated potassium feldspar powder with an alkaline solution and performing a stirring transformation reaction, followed by a first solid-liquid separation to obtain a transformed solid product; the Si / K molar ratio of the main phase of the transformed solid product does not exceed 2.5; the phase composition of the transformed solid product includes garnet and / or nepheline; (3) mixing the transformed solid product with an acid solution and performing a second solid-liquid separation to obtain a potassium-rich leachate. This invention utilizes a stirring transformation reaction with a mixed alkaline solution to restructure potassium feldspar minerals, increasing the reactivity of potassium, and then dissolving potassium with acid to ultimately obtain a potassium-rich leachate, which is beneficial for further recycling.

The invention discloses transparent microcrystalline glass and a preparation method and application thereof, and relates to the technical field of glass materials, crystal phases of the transparent microcrystalline glass comprise a primary crystal phase and a secondary crystal phase, and the mass ratio of the secondary crystal phase in the transparent microcrystalline glass is greater than or equal to 0% and less than or equal to 8%; the average grain size of the secondary crystal phase is less than or equal to 10nm; the primary crystal phase comprises sodium nepheline and triclinic nepheline, and the secondary crystal phase comprises sodium silicate and zirconium oxide; the total crystallinity of the transparent microcrystalline glass is greater than or equal to 20%; the average grain size of the crystal phase is greater than 10nm and less than or equal to 75nm; when the thickness of the transparent glass ceramic is smaller than or equal to 1.0 mm, the average transmittance of the transparent glass ceramic to light in the wavelength range of 400-780 nm is larger than or equal to 88%, the haze of the transparent glass ceramic is smaller than or equal to 0.15, the absolute value of the B value in LAB ranges from 0.6 to 1.0, and the transparent glass ceramic has excellent optical performance.

The present application relates to zirconium-free and titanium-free quartz-based ceramic tile underglaze, and a preparation method of the ceramic tile using the underglaze. The zirconium-free and titanium-free quartz-based ceramic tile underglaze comprises, by weight: 5-8 parts of talc, 6-8 parts of wollastonite, 10-20 parts of potassium feldspar, 0-3 parts of calcined kaolin, 8-10 parts of kaolin, 35-40 parts of nepheline syenite, and 18-22 parts of high-purity high-white quartz powder. The chemical composition of the underglaze comprises, by weight percentage: 2.07-3.87% of LOI, 62.64-64.25% of SiO2, 18.47-19.34% of Al2O3, 0.10-0.32% of Fe2O3, 2.67-4.75% of CaO, 2.05-2.38% of MgO, 2.07-2.15% of K2O, and 5.02-7.17% of Na2O. The present application provides a zirconium-free and titanium-free quartz-based ceramic tile underglaze with low cost, wide firing range, uniform color development, white degree of 66-72° after firing, and glossiness of 4-7°.

The invention relates to the field of architectural ceramics, and discloses light-transmitting powder, a gradually-changed light-transmitting ceramic tile and a preparation method of the gradually-changed light-transmitting ceramic tile. The light-transmitting powder comprises the following raw materials in parts by weight: 50-70 parts of nepheline syenite, 10-15 parts of superfine quartz, 10-20 parts of kaolin, 3-8 parts of barium carbonate, 5-10 parts of wollastonite, 3-5 parts of yttrium aluminum garnet and 2-4 parts of magnesium aluminate spinel. By adopting the formula, the light-transmitting green body which is high in light transmittance, stable in light transmittance and uniform in light transmittance can be prepared by compounding multiple components, and a good foundation is provided for preparing a ceramic tile with full-transparent jade texture.

The invention relates to the technical field of glass ceramics, and discloses a transparent glass ceramic, a preparation method thereof and a reinforced transparent glass ceramic. The crystal phase of the transparent glass ceramic is one or a composite crystal phase of more of sodium nepheline, triclinic nepheline, eucryptite, beta quartz solid solution and zirconium oxide; the overall crystallinity R of the transparent glass ceramic accounts for 20-70% of the total mass; when R is larger than or equal to 60%, the total crystal phase proportion M of the sodium nepheline and the triclinic nepheline and the crystal phase proportion N of the eucryptite meet the condition that M / N is larger than or equal to 0.75 and smaller than or equal to 4, and the average light transmittance T of the transparent glass ceramic in the visible light wave band of 400-700 nm is larger than or equal to 88%, the haze H is smaller than or equal to 0.18%, and B is smaller than or equal to 1.4. According to the invention, the variety of the crystal phase and the proportion of the overall crystallinity are controlled, so that the transparent glass ceramic has very high transmittance in a visible light wave band, and also has relatively good mechanical properties.

The present invention relates to a coating composition that provides high resistance to dirt, friction and polishing, due to the presence of mineral fillers and polymeric dispersions that promote resistance to polishing and meet wet abrasion resistance, said composition comprising: (a) at least one mineral filler selected from nepheline syenite, natural diatomite or a mixture thereof; (b) at least one silica-based matting agent; (c) at least one non-ionic aqueous emulsion selected from paraffin wax and high-density polyethylene wax or a mixture thereof; and (d) at least one additional component selected from the group consisting of solvent, dispersing agent, binding polymer and mixtures thereof. The present invention also relates to the use of the composition for the preparation of a washable matte acrylic paint product and matte acrylic paints containing the composition as claimed herein.

The application discloses a kind of ceramic rock plate with decorative effect and production process thereof, belong to ceramic technical field.The rock plate is composed of body layer, bottom glaze layer, face glaze layer and inkjet pattern layer, after firing, through oxygen nitrogen plasma activation, aluminum salt and ammonia source compound hydrothermal reaction, high temperature calcination and silane derivative impregnation solidification, form micro-nano rough and low surface energy synergistic protective layer.Body is with wollastonite, quartz sand and the like as raw material, bottom glaze and face glaze adopt feldspar-quartz-nepheline system;After firing, after plasma treatment and hydrothermal generation acicular alumina, then introduce silane derivative to realize super-hydrophobic and wear-resistant double function.Compared with prior art, the application is anti-fouling, wear-resistant, and reaches national standard 5 level, process is simple, can be directly connected to existing production line, suitable for high-end wall and floor decoration.

The present application provides a glass-ceramic, a method for preparing the glass-ceramic, and an electronic device. The glass-ceramic includes: a nepheline crystal phase, a phosphate crystal phase, and a niobate crystal phase. The present application utilizes the competitive growth of the niobate crystal phase and the phosphate crystal phase during the microcrystallization process to effectively inhibit the excessive growth or uneven growth of the phosphate crystal phase, thereby improving the mechanical properties of the glass-ceramic.

The present application relates to dunhuang murals stone green ceramic rock plate and manufacturing method, including: (1) pressing blank; (2) low zirconium series super white cosmetic clay: cosmetic clay is composed according to weight part: washed highland clay 6, black mud 3, glass frit 18, diopside 2, quartz powder 2, barium-based frit 4, ultrafine quartz powder 12, zirconium white frit 15, calcined alumina powder 6, zirconium silicate 3, potassium feldspar 10, nepheline powder 7, ball clay 10, calcined talc 2, sodium tripolyphosphate 0.6, sodium carboxymethyl cellulose 0.3; (3) inkjet printing: color ink is combined by cyan, blue, brown, wrapped yellow, red and black; (4) promote green glaze: promote green glaze formula is composed according to weight part: high-zinc low-temperature frit 32, fused quartz 28, quartz powder 17, white carbon black 14, highland clay 9; (5) apply protective glaze: according to the selection of product surface gloss and texture of green series product development, it can be dry particle glaze, matt or bright protective glaze; (6) high temperature sintering.

This invention discloses a protective glaze, an imitation stone ceramic tile, and a method for preparing the same, relating to the field of ceramic tile preparation. The protective glaze, by weight, comprises the following components: 8-10 parts potassium feldspar, 10-15 parts first frit, 15-22 parts calcined kaolin, 12-17 parts nepheline, 6-9 parts calcined zinc oxide, 14-17 parts quartz, 12-20 parts corundum, 3-5 parts calcined talc, and 14-18 parts zirconium silicate. When combined with a deep-inking process, the protective glaze can produce a glaze surface with deep concave textures, enhancing the stone-like effect.

The invention discloses a fluxing agent for replacing fluorite in iron and steel smelting and a manufacturing method thereof, and belongs to the field of iron and steel smelting. The fluxing agent for replacing fluorite is prepared by taking nepheline syenite containing various silicate minerals as a main material, crushing, adding a mixture taking bentonite and starch as a binder, adding water, uniformly mixing, then pressing into pellets with the diameter of 30-40mm by a machine, and airing and drying for use. Wherein the binder accounts for 3-5% by weight, is the same as fluorite, has the effects of reducing the melting point and apparent viscosity of the slag, improving the fluidity of the slag and reducing the iron loss of the slag, and can increase the alkalinity of molten steel and improve the quality of the molten steel. The ingredients overcome the defects of fluorite in iron and steel smelting, corrosion to a furnace lining of a melting furnace can be reduced, the health of workers is not harmed, pollution of slag to the environment can be reduced, and the post-treatment process of the slag is simplified, so that the treatment cost of the slag is reduced.

The invention provides transparent microcrystalline glass and a preparation method thereof, and belongs to the technical field of glass preparation. The transparent microcrystalline glass comprises a primary crystal phase, a secondary crystal phase and a residual glass phase, the primary crystal phase comprises sodium nepheline and eucryptite, and the secondary crystal phase comprises at least one of zirconium oxide and beta quartz solid solution; the total crystallinity R is 40-75 wt%; the refractive index improvement coefficient k satisfies 0.05 < = k < = 0.20. The crystal phase proportion of the crystal phase and the glass phase is limited, so that the average grain size (less than or equal to 50 nm) is controlled, and the light scattering performance is reduced; by introducing a refractive index regulator and providing a refractive index improvement coefficient (k is more than or equal to 0.05 and less than or equal to 0.2), the refractive index difference between a crystal phase and a glass phase is reduced, and the problem of poor optical performance of the microcrystalline glass is improved.

The invention belongs to the technical field of architectural ceramics, and particularly discloses a low-thermal-conductivity ceramic rock plate and a preparation method thereof. The ceramic rock plate sequentially comprises a green body, a first cover glaze layer, a second cover glaze layer, a pattern layer and a protective glaze layer from bottom to top, wherein the first cover glaze layer is prepared from the following raw material components: silica powder, wollastonite, nano montmorillonite, glass fibers, potassium feldspar, albite, calcite and boron frit powder; the second cover glaze layer is prepared from the following raw material components: halloysite, montmorillonite, hydromica, pearlite, dickite, nepheline, wollastonite and barium-strontium frit powder. The two surface glaze layers both have low heat conductivity coefficients, can effectively isolate the cool degree of a green body and reduce heat conduction, so that the ceramic rock plate has proper touch temperature, and the ice-cold feeling is reduced. The heat conductivity coefficient of the ceramic rock plate is 0.50-0.55 W / m.K, the wear resistance of the ceramic rock plate can reach grade 5, and no residual stain is left in an antifouling property test; and the glaze surface is smooth, fine and rich in texture.

The invention discloses a lead-free environment-friendly white oily cracked ceramic glaze and an application method thereof. The ceramic glaze is prepared from the following raw materials in percentage by weight: 28 to 35 weight percent of albite, 5 to 8 weight percent of Suzhou kaolin, 9 to 19 weight percent of quartz, 4 to 10 weight percent of calcite, 5 to 10 weight percent of barium carbonate, 18 to 25 weight percent of talc, 0.5 to 16 weight percent of sodium carbonate, 1.4 to 2 weight percent of ZnO and 2 to 6 weight percent of nepheline syenite. The application method comprises the following steps: step 1, preparing ceramic glaze powder; 2, mixing and ball-milling are carried out; step 3, sieving the glaze slip with meshes, and aging to obtain glaze; and 4, applying the glaze to the surface of the green body, drying, and sintering in a reducing atmosphere to obtain a ceramic glaze decoration product. The ceramic glaze has the advantages of high whiteness, high hardness and unique decorative effect, the preparation process is simple, the energy consumption is lower, and the product does not contain heavy metals such as lead and meets the green and environment-friendly requirements.

The present invention provides a method for preparing porcelain antique tiles that reduces the occurrence of surface prickly heat, and relates to the technical field of antique tile preparation methods. The method comprises the steps of (1) preparing a top glaze; (2) applying the top glaze; (3) applying an antique protective glaze; and (4) low-temperature fast firing. The present invention solves the problem of prickly heat on the brick surface by adjusting the top glaze formula and combining it with the existing antique protective glaze. By increasing the amount of quartz in the top glaze, increasing the SiO2 content, and increasing the firing temperature of the top glaze, the generation of small prickly heat caused by premature melting and sealing of the top glaze during early exhaust is reduced. The firing temperature of the top glaze is adjusted by appropriately increasing the amount of talc used to match the production firing temperature; the amount of nepheline used is reduced to adjust the thermal expansion coefficient to match the production brick shape; and barium carbonate is added to introduce BaO. BaO increases the viscosity of the glaze at low temperatures, making it difficult for gas in the brick to be discharged, thereby further reducing the occurrence of prickly heat. The firing temperature range is wide and suitable for a low-temperature fast firing environment.

This invention discloses a frit, comprising, by weight, the following raw materials: 8-10 parts albite, 5-10 parts strontium carbonate, 5-15 parts alumina, 1-6 parts corundum, 3-6 parts borax, 10-15 parts diopside, 5-10 parts clay, 10-15 parts fluorite, 15-20 parts quartz, 4-10 parts dolomite, and 1-2 parts nepheline. This frit possesses advantages such as strong water retention and good screen-removal properties. Glazes prepared using this frit can solve problems encountered in the production of marble ceramic tiles using large-format screen printing, including easy adhesion to the screen, easy detachment, poor water retention, uneven printing, and pattern layer adhesion caused by large screen size and slow screen lifting.

The invention provides a method for recovering nepheline in lithium feldspar tailings and a molecular sieve preparation method and equipment, and relates to the field of tailings recovery. The method for recovering nepheline in the lithium feldspar tailings comprises the following steps: S11, grinding, screening and calcining the lithium feldspar tailings in sequence; and S12, slurrying the calcined material, dispersing the material through an ultrasonic separation system, then adding a flocculating agent, adding the mixed slurry into a flexible recovery system, adding a flotation reagent, agglomerating a hydrophilic material, and settling and separating a hydrophobic material. According to the method for recycling the nepheline in the lithium feldspar tailings and the molecular sieve preparation method, the nepheline in the lithium feldspar tailings is recycled through a soft natural stripping process, the extraction rate of the nepheline is increased, then the nepheline is further purified and treated, the nepheline forms molecular sieve crystal mush, and molecular sieve particles are obtained through the following steps of roasting and curing and the like. Therefore, full utilization of the lithium tailings is realized, and waste utilization is realized.

This invention discloses a dark-colored velvet-textured ceramic slab, a base glaze, and its preparation method. The dark-colored velvet-textured base glaze is prepared by ball milling according to the following mass ratio of material: water: carboxymethyl cellulose: sodium tripolyphosphate: 100:36:(0.1-0.2):(0.3-0.5). The material of the velvet-textured base glaze is prepared from the following components in parts by weight: 3-8 parts wollastonite, 5-10 parts dolomite, 10-15 parts strontium carbonate, 2-5 parts calcined talc, 30-40 parts potassium feldspar, 5-10 parts nepheline, 5-10 parts calcined kaolin, 5-15 parts quartz, 1-5 parts white corundum, 3-8 parts calcined zinc oxide, and 10-15 parts matte transparent frit. The matte transparent frit includes the following components in the following mass percentage: SiO2. The composition is 55-60%, Al₂O₃ 12-15%, K₂O 2-3%, Na₂O 3-4%, CaO 20-25%, and the calcination vector of the matte transparent frit is 1%-5%. This solution improves the light transmittance of the glaze layer, enhances the transparency, and maintains a uniform and dispersed surface gloss without crystallization, resulting in a glaze surface with a velvety soft feel.

The present invention relates to the technical field of ceramic tiles, and particularly to a penetrating marble glaze, a marble tile using the same, and a preparation method thereof. Calculated by weight parts, it includes the following raw materials which are ball-milled after being mixed evenly: 25-35 parts of nepheline, 12-16 parts of wollastonite, 6-10 parts of modified barium titanate frit, 6-13 parts of ball clay, 8-12 parts of zinc oxide, 3-6 parts of barium sulfate, 15-20 parts of quartz, 8-13 parts of dolomite, 1-2 parts of talc, 2-8 parts of barium carbonate, 10-20 parts of penetrant, 5-10 parts of binder, and 10-15 parts of deionized water. By sequentially applying a porous rough glaze and a penetrating marble glaze on the base glaze layer, wherein barium sulfate and modified barium carbonate frit are added to the penetrating marble glaze layer, which helps wollastonite and zinc oxide to combine into barium zinc titanate crystals, making the glaze layer have the characteristics of being porous, rough and easy to penetrate. At the same time, the performance of the penetrating marble glaze slurry is easier to control. The marble tile prepared after firing has good anti-slip property, erosion resistance and texture sense.

The application provides a microcrystalline glass, wherein a crystal phase in the microcrystalline glass comprises a sodium-containing nepheline phase, a forsterite crystal phase and a TiO2 crystal phase, wherein the sodium-containing nepheline phase comprises one or more of sodium nepheline and a silica solid solution thereof, a sodium-potassium solid solution nepheline and a silica solid solution thereof; and the TiO2 crystal phase comprises at least one of an anatase phase and a rutile phase. The microcrystalline glass containing the above crystal phase has high light transmittance, can be efficiently ion exchanged to obtain a strengthened microcrystalline glass containing a hexagonal potassium nepheline crystal phase on the surface, and has high hardness and good drop resistance, and can meet the application requirements of large-size, ultrathin terminal glass cover plates and the like. The application also provides a strengthened microcrystalline glass obtained by strengthening the microcrystalline glass, and a terminal adopting the strengthened microcrystalline glass.

The application relates to the technical field of building ceramics, and discloses a radiation refrigeration ceramic tile and a preparation method thereof. The radiation refrigeration ceramic tile comprises a bottom glaze layer and a reflective heat insulation surface glaze layer. Raw materials of the bottom glaze layer comprise kaolin, calcined kaolin, porous alumina powder, quartz, calcined talc, nepheline, potassium feldspar, sodium feldspar, trivalent europium ion doped magnesium aluminate spinel powder and zirconium silicate. The purpose of the bottom glaze layer formula design is to design a bottom glaze layer with an expansion coefficient close to that of a conventional qualified ceramic tile, and meanwhile, porous alumina and trivalent europium ion doped magnesium aluminate spinel powder are introduced, so that the expansion coefficient of the bottom glaze layer is consistent with that of a conventional produced body and the reflective heat insulation surface glaze layer, the structure of the porous alumina is not damaged, and the problem that the reflectivity and emissivity of the glaze are difficult to effectively improve when the expansion coefficients of the bottom glaze layer, the body and the surface glaze layer are inconsistent is solved. + The trivalent europium ion doped magnesium aluminate spinel powder ensures that the expansion coefficient of the bottom glaze layer is consistent with that of the conventional produced body and the reflective heat insulation surface glaze layer, the structure of the porous alumina is not damaged, and the problem that the reflectivity and emissivity of the glaze are difficult to effectively improve when the expansion coefficients of the bottom glaze layer, the body and the surface glaze layer are inconsistent is solved.

The invention belongs to the technical field of protective coatings, and particularly discloses a cold and hot alternating self-adaptive coating and a preparation method thereof.The preparation method comprises the steps that a modified fluororubber matrix, directional flaky filler and a thermal expansion regulating agent are stirred at a high speed for 15-20 min according to the weight parts, ultrasonic dispersion is conducted for 8-12 min, and the coating is obtained; wherein the modified fluororubber matrix is selected from organic silicon modified fluororubber; the oriented flaky filler is one or more of talcum powder, vermiculite and mica powder with the thickness-diameter ratio larger than or equal to 50: 1; the thermal expansion regulating agent is one or more of cordierite, zirconolite and beta-eucryptite. The coating is formed by compounding the modified fluororubber, the oriented flaky filler and the thermal expansion regulating agent, and the elongation at break gt of the fluororubber coating is achieved through the synergistic effect of the three; the elastic retention rate is gt after a cold and hot cycle effect at 400 DEG C / 1h; and the interface adhesive force of the coating is increased to be greater than or equal to 5 MPa, the coating is free of cracks after 300 times of cold and hot cycles, the integrity of the coating is kept, and a long-life and high-reliability solution is provided for extreme temperature cycle scenes.

The present application relates to a method for separating and purifying desilication products from red mud, drying the red mud, coarsely grinding it into powder, passing it through a 325 mesh vibrating screen, and performing multi-stage gravity separation on the undersize product until a gravity concentrate with a density less than 2.2 g / cm 3 is obtained, removing impurities from the obtained gravity concentrate with dilute alkali, and then performing solid-liquid separation, collecting the solid precipitate, and performing washing and drying treatment on the solid precipitate to obtain a desilication product purification product. The present application separates and purifies desilication products from red mud using a simple method without the need for high temperature and high pressure, etc., thereby maximizing the preservation of the original appearance and physicochemical properties of sodalite and calcium nepheline desilication products, which can be used as original samples for mineralogical analysis, elemental composition analysis, and microscopic morphology analysis of desilication products contained in red mud. The desilication products separated and purified by the present application have high purity, low investment and operating costs, and can be applied on a large scale in industry.