255 results about "Silicate glass" patented technology

The invention belongs to the technical field of glass manufacturing, and particularly relates to anti-falling and anti-scratching lithium aluminum silicate glass and a preparation method thereof.The anti-falling and anti-scratching lithium aluminum silicate glass is prepared from, by mass, 250.0%-65.0% of SiO2, 10.0%-20.0% of Al2O3, 2.0%-8.0% of Na2O, 1.0%-5.0% of K2O, 1.0%-5.0% of MgO, 1.0%-5.0% of ZrO2, 2.0%-8.0% of Li2O, 0.1%-2.0% of CaO, 1.0%-5.0% of Y2O3, 0.1%-5.0% of BaO and 0.05%-0.5% of additives; the additive is one or more of Fe2O3, Co2O3, CuO and Cr2O3; the mass ratio of BaO to Y2O3 is 1: (2-4). The problems of long founding time, low ion exchange process efficiency, low hardness, low bending strength and poor high-temperature stability of the existing lithium aluminosilicate glass preparation process are solved.

The application discloses a kind of ship super-long anticorrosion special nano powder coating, preparation method and application, belong to ship heavy anticorrosion material technical field.The preparation method of the ship super-long anticorrosion special nano powder coating is as follows: epoxy resin, graphene modified epoxy resin, core-shell structure ZnO@SiO2, modified 2,5-dimercapto-1,3,4-thiadiazole, borosilicate glass powder, flaky boron nitride, silane coupling agent modified silica, phenolic amine curing agent, 2-ethyl-4-methylimidazole, fumed silica, defoaming agent, ultraviolet absorber, high-temperature pigment are put into stirrer and stirred for 20-30min, then melt extrusion is carried out through double screw extruder, the extrusion temperature is 90-110 DEG C, grinds and sieves, and the ship super-long anticorrosion special nano powder coating is obtained.The coating prepared by the application has good anticorrosion performance and can be applied in the field of ship metal surface corrosion protection.

An embodiment of the present disclosure relates to the field of photovoltaics, and provides a solar cell and a manufacturing method thereof. The manufacturing method includes the steps of: providing a substrate having a first surface and a second surface facing each other; performing a doping process on at least the first surface to form a doped layer having a first doping element; performing a first laser process on a portion of the doped layer to form an activated portion and leaving the remaining doped layer as a doped portion; performing a first etching process on the first surface, using the remaining doped layer as a dead layer, to remove the activated portion and form a first textured surface; forming a doped polysilicon layer and a silicate glass layer having a second doping element at least on a side of the substrate away from the doped portion; performing a second laser process on at least a portion of the silicate glass layer to form a sparse portion; and performing a second etching process on at least the second surface, using the remaining silicate glass layer as a protective layer, to remove the sparse portion and the doped polysilicon layer facing the sparse portion and form a second textured surface. The first laser process and the second laser process use different laser types, thereby simplifying at least the manufacturing process.

The invention discloses a fluid inclusion standard sample for in-situ isotope analysis as well as preparation and application of the fluid inclusion standard sample. The preparation method comprises the following steps: obtaining silicate glass powder with uniform components, carrying out high-temperature and high-pressure reaction on the glass powder and a fluid salt solution with the same mass in a closed Cu-Au tube, taking out a reaction product after the reaction, and drying to obtain the fluid inclusion standard sample for isotope analysis. According to the method, the silicate glass with uniform components can rapidly capture the fluid inclusion, and the Cu isotope in the fluid inclusion is accurately measured and controlled according to the fractionation degree of the Cu isotope between the acid salt melt and the fluid.

The invention relates to the technical field of glass, in particular to an alkali-free aluminoborosilicate glass composite clarifying agent and a clarifying method thereof. The alkali-free aluminoborosilicate glass composite clarifying agent is prepared from the following raw materials in percentage by mass on the basis of the total mass of alkali-free aluminoborosilicate glass: 0.4 to 5.5 percent of halogen alkaline earth metal salt, 0.03 to 0.4 percent of lanthanum oxide, 0.01 to 0.4 percent of tin dioxide and 0.01 to 0.3 percent of cerium dioxide. The alkali-free aluminoborosilicate glass composite clarifying agent is applied to alkali-free aluminoborosilicate glass, and the problems that the alkali-free aluminoborosilicate glass is poor in clarifying effect and has many bubble defects are solved; the corrosion of high-temperature molten glass to refractory materials at parts such as a tank furnace and the like is reduced, so that the number of stone defects of the refractory materials in the glass is reduced, and the service life of the refractory materials of the furnace is prolonged.

The invention belongs to the technical field of sealants, and particularly relates to a heat-conducting flame-retardant sealant for a power battery and a preparation method thereof.The heat-conducting flame-retardant sealant for the power battery is prepared through collaborative design of a composite heat-conducting filler and a polyglutamic acid-melamine cyanurate-calcium hydrophosphate composite flame retardant and combination of magnetic field dispersion, ultrasonic blending and silane coupling agent interface optimization technologies; the heat-conducting and flame-retardant properties of the material are obviously improved. A lithium silicate glass ceramic precursor is subjected to surface modification through phosphorus oxychloride, the combination of a reinforcing filler and a matrix is enhanced, a flexible cross-linked network is constructed by amino-terminated polyether and an isocyanate curing agent, and the mechanical strength and thermal stability are guaranteed. The sealant inhibits combustion propagation and reduces toxic gas release through a multi-stage reaction mechanism during thermal runaway, meanwhile, the sealant adapts to high-frequency vibration and thermal cycle working conditions of a battery module, and the preparation process realizes synergistic enhancement of heat conduction and flame retardance through gradient stirring, vacuum defoaming and filler uniform dispersion technologies.

The invention discloses fluorescent glass ceramic, a preparation method thereof and a luminescent device, and belongs to the technical field of luminescent materials. The fluorescent glass ceramic comprises glass powder and fluorescent powder, the glass powder comprises zinc borosilicate glass powder; the zinc borosilicate glass powder comprises the following components in percentage by mole: 5%-20% of SiO2, 10%-35% of B2O3, 20%-65% of ZnO, 0.3%-15% of P2O5, 2%-20% of RO and 0.1%-15% of R2O, RO is selected from at least one of MgO, CaO, SrO and BaO, and R2O is selected from at least one of Li2O, Na2O and K2O; the fluorescent powder comprises blue-green fluorescent powder; the emission peak wavelength of the blue-green fluorescent powder is 480-510 nm; based on the total mass of the glass powder and the fluorescent powder, the mass percentage content of the glass powder is 30-80%, and the mass percentage content of the fluorescent powder is 20-70%. The fluorescent glass ceramic is high in reliability and can be applied to high-power light emitting, a light emitting device formed by combining the fluorescent glass ceramic and a proper light source can provide an accurate azure light emitting effect, and the requirements in application scenes with harsh color requirements are met.

The invention discloses sand grains with a water storage structure and a preparation method and application thereof. The method comprises the steps that S1, sand grains with the grain size ranging from 0.1 mm to 1 mm are selected, the grain size distribution meets the condition that D50 is equal to 0.3 mm, clay impurities are screened out, and the sand grains are placed on a sand grain base plate (1) after being cleaned and dried; s2, nano silicate powder is uniformly sprayed on the surfaces of the sand grains through an electrostatic spraying technology, so that a silicate glass layer (5) is formed on the surfaces of the sand grains; s3, a microarray lens (3) is used for dividing a laser source into multiple laser beams, each laser beam irradiates the silicate glass layer (5) on each sand grain in a one-to-one mode, silicate powder and the surface layers of the sand grains are co-melted, and then an amorphous net-shaped structure is formed; s4, argon is used for spraying the amorphous net-shaped structure so that the amorphous net-shaped structure can be rapidly cooled, and then a porous heterojunction structure is formed on the surface of the sand grains; and S5, scanning the silicate glass layer (5) by using the laser again, so that the part of the silicate glass layer (5) is molten again, silicate is decomposed to generate gas, and cooling and curing are performed after bubbles are formed in the molten glass. According to the invention, the sand grains have a certain water storage characteristic.

A polishing liquid for polishing undoped silicate glass, the polishing liquid having a pH of 3.0 or more. A polishing method including a step of polishing a surface to be polished of a member to be polished containing undoped silicate glass by using the above-described polishing liquid. A method for manufacturing a component, including obtaining a component by using a polished member polished by the above-described polishing method.

The invention relates to an environment-friendly water-based composite flame retardant and a preparation method thereof, and belongs to the technical field of flame retardant preparation. A formula of the environment-friendly water-based composite flame retardant comprises the following components in percentage by weight: 1.5-3.0% of modified graphene, 8-12% of nano magnesium hydroxide, 5-8% of nano sodium silicate, 0.5-1.0% of a surfactant and the balance of deionized water. Modified graphene, nano magnesium hydroxide and sodium silicate generate a synergistic flame-retardant effect, the modified graphene builds a compact carbon layer framework, magnesium hydroxide reflects heat radiation through endothermic decomposition and magnesium oxide barrier, sodium silicate promotes formation of a silicate glassy carbon layer, and the oxygen index of the material is remarkably increased through compounding of the three. The flame retardant prepared by the invention has excellent thermal conductivity and environment-friendly characteristic, and can be widely applied to the fields of fire extinguishing and flame retardance.

The invention discloses a low-dielectric low-loss high-strength borosilicate glass ceramic composite material and a preparation method thereof, and belongs to the technical field of borosilicate glass ceramic composites.The low-dielectric low-loss high-strength borosilicate glass ceramic composite material is prepared from, by weight, 70% of low-alkali borosilicate glass ceramics with the low borosilicate ratio, 29% of Al2O3 and 1% of Bi2O3. The preparation method comprises the following steps: preparing low-alkali borosilicate glass ceramics with a high borosilicate ratio, melting the low-alkali borosilicate glass ceramics with the high borosilicate ratio and amorphous SiO2 at a set temperature to obtain the required low-alkali borosilicate glass ceramics with the low borosilicate ratio, and finally mixing and ball-milling the crushed and ground low-alkali borosilicate glass ceramics with Al2O3 and Bi2O3 to obtain the low-alkali borosilicate glass ceramics with the low borosilicate ratio. And finally, the borosilicate glass ceramic composite material is sintered at the temperature of 880-900 DEG C. The borosilicate microcrystalline glass ceramic composite material is low in dielectric, low in loss and high in strength.

The invention relates to a lithium aluminosilicate glass ceramic having a coefficient of thermal expansion in the range of 20 DEG C to 700 DEG C of-0.5 to 1.9 ppm / K and to the use thereof. The glass ceramic contains the following components in percentage by weight on the basis of oxides: 60 to 70 percent of SiO2, 17 to 25 percent of Al2O3, 1.5 to 1t of Li2O, 0.5 to 1.5 percent of Na2O, 0.5 to 1.5 percent of Na2O, 0.5 to 1.5 percent of Na2O and 0.5 to 1.5 percent of Na2O. 3.0% of MgO, 0-1.4% of K2Ogt, 0-1.4% of 1 to 3 parts of SnO2 and 0.1 to 1t of SnO2; 1.

Method for producing a shatter-resistant membrane glass (2) of a glass component of a measuring half-cell (1) of an analyte-sensitive sensor, comprising: - providing at least one membrane glass (2) of a sensor blown onto a shaft (3), which consists of a sodium- and lithium-containing glass, preferably sodium- and lithium silicate glass, or of a lithium-containing glass, preferably lithium silicate glass, or comprises one of these materials; - bringing the at least one membrane glass (2) blown onto a shaft (3) into contact with a pickling solution containing sodium ions, preferably a sodium acetate or sodium nitrate solution or a melt containing sodium ions; - heating the membrane glass (2) at a temperature of 200°C-500°C, preferably 300-450°C, more preferably 400-450°C for 10-20 minutes, wherein the membrane glass (2) is ion-sensitive.

This application belongs to the field of ceramic tile technology and specifically discloses a candy dry granule glaze, a candy-effect ceramic tile, and a preparation method. The candy dry granule glaze comprises candy dry granules, and its raw materials, by weight, include: 11-15 parts kaolin, 21-31 parts soda-lime silicate glass powder, 7-13 parts nano-silicon dioxide, 12-18 parts alpha-alumina, 2-5 parts calcium fluoride, 5-13 parts nano-zinc oxide, 2-6 parts borax, 3-5 parts sodium carbonate, 4-6 parts potassium carbonate, 1-3 parts lithium carbonate, and 8-10 parts calcium carbonate; a glaze layer formed on the surface of the ceramic tile by the candy dry granule glaze is obtained to obtain a ceramic tile with a candy effect. The candy dry granule glaze provided in this application takes into account both good transparency and good physical properties, with a more three-dimensional and natural texture and high wear and stain resistance.

The invention relates to a lithium aluminosilicate glass ceramic having a coefficient of thermal expansion in the range of 20 DEG C to 700 DEG C of-0.5 to 1.9 ppm / K and to the use thereof. The glass ceramic contains the following components in percentage by weight on the basis of oxides: 60-70% of SiO2, 17-25% of Al2O3, 2.0-lt of Li2O, 0.1-0.5% of MgO, 0.1-0.5% of MgO, 0.1-0.5% of Na2O, 0.1-0.5% of Na2O, 0.1-0.5 3.0, MgOgt is selected; 1.5 to 4.0 parts of ZnO (zinc oxide) gt; and 3.0 to 6.0 parts by weight.

A method of measuring temperature includes positioning an optical fiber in contact with an object or in an environment having a temperature to be determined, where the optical fiber comprises a core surrounded by a cladding; the core comprises an alkaline-earth fluorosilicate glass including defects, and the cladding comprises a silica glass. Infrared light is supplied to the optical fiber, thereby electronically exciting the defects. Green light emitted from the defects is detected, and an intensity value of the green light is obtained and converted to a temperature value for the optical fiber, whereby the temperature of the object or environment is determined. The green light may be detected along a length of the optical fiber, and a plurality of intensity values may be converted to a plurality of temperature values along the fiber length, thereby obtaining a distributed measurement of the temperature of the object or environment.

The invention relates to a preparation technology of a solar cell selective emitter, and relates to the field of solar cell preparation. The method mainly comprises the following steps of: slotting on a silicon substrate with a prepared borosilicate glass layer by using laser, removing the borosilicate glass layer in a slotting area, printing boron slurry in the slotting area, oxidizing to form a heavy expansion area in a boron slurry printing area, and forming a light expansion area in a non-laser slotting area. The preparation process can effectively improve the surface concentration of the re-diffusion region, reduce metal contact and improve the cell efficiency.

The invention belongs to the technical field of ceramic tiles, and particularly discloses a candy dry granular glaze, a candy effect ceramic tile and a preparation method. The candy dry granular glaze comprises candy dry granules and is prepared from the following raw materials in parts by weight: 11-15 parts of kaolin, 21-31 parts of soda-lime silicate glass powder, 7-13 parts of nano silicon dioxide, 12-18 parts of alpha-aluminum oxide, 2-5 parts of calcium fluoride, 5-13 parts of nano zinc oxide, 2-6 parts of borax, 3-5 parts of sodium carbonate, 4-6 parts of potassium carbonate, 1-3 parts of lithium carbonate and 8-10 parts of calcium carbonate. A ceramic tile with a candy effect is obtained through a glaze layer formed on the surface of the ceramic tile through the candy dry granular glaze. The candy dry granular glaze provided by the invention has better transparency and better physical properties, the texture is more three-dimensional and natural, and the candy dry granular glaze has higher wear-resistant and antifouling properties.

The method suggests coating the transparent solid with an additional laser radiation absorptive layer of material and then laser texture the coated solid to attain a nanostructured transparent solid with increased transmissivity while the additional coating 5 is removed. This method is applicable but not limited to a substrate transparent solid like glasses of silicate composition, such as fused silica, borosilicates, aluminosilicates, alkali aluminosilicates, float glasses, crown glass, amorphous sapphire etc., crystals, for example crystalline sapphire, laser active medium crystals etc. and polymers, for example polycarbonate, plexiglass etc. It is also applicable to substrates coated with a thin film of 0 above mentioned materials.

The present invention relates to a method for producing silicate glass from oxide-based waste comprising alkalis and earth-alkalis at a level of equal to or greater 5wt%, preferably 10wt%, preferably 15wt%, more preferably 20wt%, even more preferably 25% by weight of the total composition of the oxide-based waste; comprising at least one metal and / or metalloid elements (M) selected from the group consisting of Fe, Co, Cr, Ni, V, Sb, Zn, Mn, Sn, Bi, Pb, Ag, Cu, W, Nb, Mo and mixtures thereof. The amount of at least one metal and / or metalloid elements (M), has been lowered by the following steps : a) melting the oxide-based waste to obtain a oxide melt; b) performing a chemical reaction to reduce the oxide melt to precipitate a metal phase enriched in the metal and / or metalloid elements; c) separating at least a part of the metal phase from the oxide melt to obtain a purified oxide melt; d) preferably, performing an oxidation treatment on the purified oxide melt to obtain a highly purified oxide material; and e) using the purified oxide melt and / or preferably the highly purified oxide material, as component for silicate glass.

The invention relates to sunglasses glass which comprises borosilicate glass and is characterized in that Fe2O3 accounting for 2-10wt% of the weight of the borosilicate glass is added into the borosilicate glass; the borosilicate glass is mainly prepared from the following raw materials in percentage by weight: 40 to 60 percent of SiO2, 10 to 30 percent of B2O3, 5 to 20 percent of Na2O and 1 to 10 percent of Al2O3. The borosilicate glass has the advantages that Fe2O3 is doped in the borosilicate glass, so that the absorption capacity of the glass to ultraviolet rays is improved, and the protection effect of sunglasses is enhanced; the body of the glass absorbs ultraviolet rays, additional coating is not needed, the durability is improved, and the problem of stripping or color fading is avoided; the glass has excellent ultraviolet protection performance and mechanical strength and is suitable for sunglasses glass, and the ultraviolet transmittance of the sunglasses glass at 0-400 nm is 0.

The present application belongs to the field of sealant technology, and specifically relates to a heat-conducting flame-retardant sealant for power batteries and its preparation method. By collaboratively designing a composite heat-conducting filler with a polyglutamic acid-melamine cyanurate-calcium hydrogen phosphate composite flame retardant, combined with magnetic field dispersion, ultrasonic blending and silane coupling agent interface optimization technology, the thermal conductivity and flame retardancy of the material are significantly improved. The lithium silicate glass ceramic precursor is surface-modified by phosphorus oxychloride to enhance the bonding between the filler and the matrix. The amino-terminated polyether and the isocyanate curing agent construct a flexible cross-linked network to ensure mechanical strength and thermal stability. The sealant suppresses the propagation of combustion through a multi-stage reaction mechanism in the event of thermal runaway, reduces the release of toxic gases, and adapts to the high-frequency vibration and thermal cycling conditions of the battery module. The preparation process achieves a synergistic enhancement of thermal conductivity and flame retardancy through gradient stirring, vacuum degassing and uniform dispersion of fillers.

The invention discloses a method for solidifying heavy metal ions in a nickel slag filling material, and belongs to the technical field of mine filling materials. The method comprises the following steps: sequentially carrying out anoxic pyrolysis (200-250 DEG C, O2 < = 3%), CO2 mineralization (300-350 DEG C, CO2 > = 90%) and liquid nitrogen shock cooling (the cooling rate is > = 50 DEG C / min) on the nickel slag to form an amorphous silicate glass body; and then mixing the thermally activated nickel slag with amino-functionalized activated carbon and MOFs loaded nano silicon dioxide, adding calcium-based montmorillonite, adding water, stirring, and hardening at normal temperature, so that heavy metal ions in the nickel slag filling material can be cured. The leaching rate of solidified and hardened heavy metal ions is lower than the national standard limit value of 1 mg / L, the compressive strength reaches 28.1 MPa, 15 tons of CO2 can be sealed for storage when every ten thousand tons of nickel slag are treated, and the method has high stability, low carbon property and industrial application potential.

The invention discloses a silicate glass fast ion conductor material and a preparation method thereof, the chemical component of the silicate glass fast ion conductor material is AnBmSieOkMyXq, A is a carrier and comprises one or more of Li, Na, K, Ag and Cu; b is a doping ion in a silicate glass structure and comprises one or more of P, B, Al, Zn, Ca, Y, In, Zr, Hf, La, Ce, Ti, Sb, Bi, C, Ge, Sn, Pb and Ga; m is one or more of Ta, Ti, Zr, Hf, V, Nb, Y, In and Ga; x is one or more of F, Cl, Br, I, O, S and N; n, m, e, k, y and q are all integers, 0 < n < = 6, 0 < = m < = 3, 1 < = e < = 6, 4 < = k < = 16, 0 < = y < = 2, and 0 < = q < = 4. According to the invention, the network polymerization degree and the softening point of the material are obviously reduced, the Young modulus is regulated and controlled, an ion migration channel is expanded, the activation energy is reduced, and the quick charge requirement of a solid-state battery is met.

The present invention belongs to the field of glass manufacturing technology and specifically relates to a drop-resistant and scratch-resistant lithium aluminosilicate glass and a preparation method thereof. The glass comprises the following components, by mass percentage: SiO2 50.0-65.0%, Al2O3 10.0-20.0%, Na2O 2.0-8.0%, K2O 1.0-5.0%, MgO 1.0-5.0%, ZrO2 1.0-5.0%, Li2O 2.0-8.0%, CaO 0.1-2.0%, Y2O3 1.0-5.0%, BaO 0.1-5.0%, and an additive 0.05-0.5%. The additive is one or more of Fe2O3, Co2O3, CuO, and Cr2O3. The mass ratio of BaO to Y2O3 is 1:2-4. The present invention solves the problems of the existing lithium aluminosilicate glass preparation process, such as long melting time, low ion exchange process efficiency, low hardness, low flexural strength, and poor high-temperature stability.

The invention discloses a neutral ramming material for an intermediate frequency furnace, and belongs to the technical field of steel smelting. Comprising the following raw materials in parts by weight: 35-40 parts of microporous sintered corundum particles with the particle size of 3-5mm, 35-40 parts of microporous sintered corundum particles with the particle size of 1-3mm, 20-25 parts of magnesium aluminate spinel particles with the particle size of 1-3mm, 9-11 parts of activated aluminum oxide micro powder, 5-7 parts of modified cordierite fine powder, 1-2 parts of pretreated boron nitride, 0.5-1.5 parts of nano aluminum oxide and 0.2 part of nano aluminum oxide. 0.4 part by weight of zinc borosilicate glass powder, 0.6-0.8 part by weight of high-temperature organic silicon resin and 0.05-0.1 part by weight of anti-burst fiber. The prepared neutral ramming material for the intermediate frequency furnace has good compression strength, thermal shock resistance and slag resistance.

The invention relates to the technical field of fireproof materials, and discloses a fireproof plugging material and a preparation method thereof, and the fireproof plugging material comprises the following components by mass: 20-40 parts of a metal oxide enriched phosphate gelling system, 10-25 parts of an expansion main body, 5-15 parts of a synergistic fluxing and heat absorbent, 30-50 parts of an in-situ reactive aggregate, and 1-5 parts of reinforced fibers. According to the preparation method, a four-stage chain reaction system of expansion, synergistic fluxing, volatilization inhibition and in-situ welding is constructed, an oxygen-enriched phosphate gelling system provides BO volatilization inhibition capability and a POprecursor, boric acid provides a low-temperature endothermic effect and a BO precursor, the oxygen-enriched phosphate gelling system and the boric acid form a phosphorus borate eutectic melt at the temperature of 600-900 DEG C, and the low-temperature heat absorption effect and the BO precursor form a low-temperature heat absorption effect and a low-temperature heat absorption effect at the temperature of 600-900 DEG C; and the melt further reacts with wollastonite to generate a calcium-magnesium-boron-phosphorus-silicate glass phase, and a loose carbon layer obtained after expandable graphite is expanded is welded, so that the core contradiction that high expansion rate and high-temperature residual strength cannot be considered at the same time in the prior art is effectively solved.

The invention relates to the technical field of glass strengthening, in particular to a low-temperature ion exchange strengthening process method for high-strength glass. According to the technical scheme provided by the invention, the method comprises the following steps: S1, pretreatment of a glass substrate: carrying out ultrasonic cleaning and surface activation treatment on soda-lime silicate glass; s2, low-temperature ion exchange: immersing the pretreated glass into a salt bath containing composite molten salt at 350-420 DEG C, and meanwhile, applying a gradient electric field to treat for 8-14 hours; s3, cooling: cooling the glass from the exchange temperature to 80 DEG C or below by adopting an aerial fog two-phase gradient cooling mode; s4, washing and drying to obtain tempered glass; through the process method, the process time is greatly shortened, the energy consumption is reduced, the performance is remarkably improved, and the thermal deformation risk of the glass is reduced.

The present application relates to the technical field of protecting slag, in particular to a special protecting slag for non-oriented high-grade silicon steel for new energy automobile motor, which is composed of the following raw materials: acid leaching wollastonite, glass powder, lithium-loaded hydrotalcite, zirconium oxide, silicon carbide and magnesia.The present application removes calcium impurities in wollastonite through acid leaching treatment to obtain high-activity porous SiO2, so as to quickly form a homogeneous low-melting-point silicate glass phase in the molten slag, effectively avoid the generation of high-viscosity calcium aluminum yellow longite, and keep the molten slag viscosity stable; lithium ions and CO2 gas are released from lithium-loaded hydrotalcite in the decomposition process, Li + further reduces the viscosity by charge balance depolymerization of the silicon-oxygen network; in addition, the pure base of acid leaching wollastonite enhances the viscosity reduction efficiency of Li + , and improves the ability of the slag layer to resist the impact of steel flow.

The invention belongs to the technical field of silicate glass, and relates to low-expansion silicate glass and a preparation method thereof. Comprising the following steps: preheating a reaction precursor, a carrier gas and an oxidation reaction gas to 900-1200 DEG C; wherein the reaction precursor comprises a silicon-containing compound and a titanium-containing compound; and carrying out plasma chemical vapor deposition on the preheated reaction precursor, the carrier gas and the oxidation reaction gas in vacuum at the temperature of 1200-1800 DEG C to prepare the low-expansion silicate glass. The preparation method provided by the invention can effectively solve the problem that the thermal expansion coefficient of the current silicate glass is relatively high, so that the application requirements of the silicate glass in extremely sensitive fields such as optical fiber coating, precision optics, extreme ultraviolet lithography, aerospace and the like are met.