390 results about "Polysilazane" patented technology

The invention provides a polysilazane green special refractory ceramic coating and a preparation method thereof, and belongs to the field of ceramic coatings. The ternary core material composed of titanium carbide, zirconium boride and silicon nitride provides high hardness, oxidation resistance, thermal shock resistance and excellent thermal stability; the silicon dioxide-aluminum oxide composite shell layer remarkably improves the oxidation resistance and reliability of the coating through the synergistic oxidation resistance and crack self-repairing function; the multi-metal oxygen cluster network endows the coating with excellent electrical conductivity, thermal conductivity and corrosion resistance; the intercalated montmorillonite enhances the crack resistance and oxidation resistance through a layered structure and embedded active ions; and the boron nitride coated vanadium carbide particles provide lubricity, oxidation resistance and wear resistance. Through collaborative optimization of multiple components, the comprehensive performance of the coating is comprehensively improved in the aspects of oxidation resistance, thermal conductivity, interface stability, high-temperature performance, mechanical performance and the like, so that the coating shows excellent long-term stability and functionality in an extreme environment.

The invention discloses a heat-dissipation flame-retardant composite material as well as a preparation method and application thereof, and belongs to the field of functional composite materials. The preparation method comprises the following steps: S1, mixing a ceramic filler with a phosphorus-containing modifier, and carrying out inorganic modification to obtain a first modified filler; s2, mixing the first modified filler with an organic modifier to obtain a second modified filler; s3, mixing the second modified filler with the polymer matrix to obtain the heat-dissipation flame-retardant composite material. The organic modifier is at least one of polysilazane, polysilazane and polysiloxane. The phosphorus-containing modifier and the organic modifier are adopted to modify the ceramic filler, so that the flame retardant property, the thermal stability and the high temperature resistance of the composite material are improved, the compatibility between the ceramic filler and the filler and between the filler and a polymer substrate is improved, the dispersity of the ceramic filler in the polymer substrate is improved, and the thermal resistance of the composite material is reduced; and the heat dissipation capability of the composite material is improved.

The invention discloses a synthesis method of phosphorus-containing polysilazane. The synthesis method comprises the following steps: S1, preparing solid methyl hydrogen polysilazane; s2, solid methyl hydrogen polysilazane is dissolved in an organic solvent, phosphate ester is added, the mixture is stirred to be uniform, then a Karst catalyst is added, and a phosphorus-containing polysilazane solution is obtained after a heating reaction. The phosphorus-containing polysilazane solution obtained through combined action of polysilazane and phosphate containing a vinyl structure is applied to an anti-corrosion coating, the anti-corrosion coating with the thin thickness can be obtained, and the adhesive force and the salt spray resistance are excellent. According to the invention, self-made phosphorus-containing polysilazane is adopted, phosphate is connected to polysilazane through chemical modification, the salt spray resistance effect is improved, the storage stability is good, phosphorus liquid passivation treatment is not needed, and the process is green and environment-friendly.

The invention discloses a high-temperature-resistant insulated copper wire and a preparation method thereof, and belongs to the technical field of enameled insulated copper wires. The high-temperature-resistant insulated copper wire comprises a copper wire body (1) and a polysilazane mixed filler layer (2), and the polysilazane mixed filler layer (2) wraps the surface of the copper wire body (1) and is formed by mixing polysilazane and inorganic filler. According to the preparation method of the high-temperature-resistant insulated copper wire, firstly, polysilazane and inorganic filler are mixed, the surface of the copper wire body is coated with the mixed polysilazane and inorganic filler, and the organic-inorganic combined coated insulated copper wire has the advantages of being resistant to high temperature and high pressure, high in hardness and quality and uniform in coating and has high stability and reliability.

The invention belongs to the field of epoxy resin composite materials, and particularly relates to a high-heat-resistance degradable epoxy resin composite material and a preparation method thereof.The high-heat-resistance degradable epoxy resin composite material is prepared by using ester-based structure epoxy resin as matrix resin, selecting benzoxazine as reinforced resin, using a phosphorus-containing polysilazane derivative as a modifier and using anhydride as a curing agent; the high-heat-resistance degradable epoxy resin composite material is prepared by taking epoxy resin as a raw material and an amine accelerant as an accelerant through mixing, pouring, curing and forming. The high-heat-resistance degradable epoxy resin composite material disclosed by the invention has excellent degradation capability in an alkaline solution at the temperature of 80-150 DEG C; the heat resistance is excellent, and the glass transition temperature can reach 185 DEG C; meanwhile, the high mechanical strength is achieved.

The invention discloses an optical thin film and a preparation method thereof, and relates to the technical field of optical thin films. The optical thin film comprises a base film, and a low-refractive-index layer and a high-refractive-index layer which are sequentially arranged on the surface of the base film, the high refractive index layer is prepared from TiO2, a Y2O3-CeO2 nanowire and graphene oxide; the low refractive index layer is prepared from mesoporous SiO2 aerogel, a MgF2 nanosheet and polysilazane. The preparation method of the optical thin film comprises the following steps: coating the base film with the low-refractive-index layer by a sol-gel spin-coating method, and coating the low-refractive-index layer with the high-refractive-index layer by aerosol-assisted chemical vapor deposition. The surface of the base film is sequentially coated with the low-refractive-index layer and the high-refractive-index layer, so that an antireflection effect is formed, and the surface reflectivity is reduced; the comprehensive performance of high light transmission, low reflection, bending resistance, environmental aging resistance and the like is realized.

The invention relates to the technical field of coating materials, in particular to a high-scratch-resistant and wear-resistant coating material and a preparation method thereof.The high-scratch-resistant and wear-resistant coating material is prepared from, by weight, 20-30 parts of tetraphenol ethane tetraglycidyl ether epoxy resin, 15-25 parts of polyurethane modified polytetrafluoroethylene, 15-25 parts of acrylate modified polysilazane and 5-15 parts of modified nano tungsten carbide. 2-5 parts of a curing agent, 1-3 parts of a dispersing agent and 0.5-1 part of an antioxidant; the preparation method comprises the steps of raw material mixing, stirring, coating, drying, heat treatment and the like. Through matching of specific raw materials, the prepared coating paint not only can improve the scratch resistance and wear resistance of a metal matrix, but also has good high temperature resistance, high humidity resistance and corrosion resistance, and the performance is not affected when the coating paint is used in different environments.

The invention relates to the technical field of high polymer materials and preparation, and discloses a high-temperature-resistant ceramic polymer-derived ceramic precursor resin molding compound and a preparation method thereof. The high-temperature-resistant composite material is prepared from the following raw materials: 100 parts of high-molecular methyl hydrogen solid polysilazane resin, 1.0 to 5.0 parts of organic silicon plastic modifier, 30 to 40 parts of hybrid fiber, 1.0 to 5.0 parts of fiber sizing agent, 20 to 25 parts of high-temperature-resistant active filler, 10 to 15 parts of fluxing agent, 1.0 to 5.0 parts of high-temperature-resistant lubricant, 0.01 to 2.50 parts of curing agent, 0.1 to 5.0 parts of release agent and 1.2 parts of high-temperature-resistant pigment. Wherein the fiber sizing agent is one or more of epoxy resin, hexamethyldisilazane and polydopamine. The high-temperature-resistant ceramizable polymer derived ceramic precursor resin molding compound provided by the invention has good processability and relatively high ceramic yield.

The invention provides a wear-resistant coating, a preparation method thereof, a workpiece and a treatment method of the workpiece. The wear-resistant coating comprises polysilazane resin and auxiliary materials, the auxiliary materials comprise the following components in parts by weight: 1-10 parts of an active filler, 5-50 parts of a structural filler, 10-70 parts of a solvent and 0.1-2 parts of a dispersing aid; and the polysilazane resin accounts for 20-40% of the weight of the wear-resistant coating. According to the preparation method disclosed by the invention, the active filler, the structural filler, the solvent and the dispersing aid are crushed and mixed in a ball milling manner, and then are uniformly mixed with the polysilazane resin, so that the wear-resistant coating prepared by the method disclosed by the invention has the characteristics of good wear resistance and strong adhesive force; and the problem that the silicon nitride ceramic coating is easy to crack can be effectively solved through the cooperative use of the polysilazane resin and the auxiliary materials.

The invention belongs to the technical field of nanofiltration, and provides a preparation method of a recrystallized silicon carbide-silicon carbonitride ceramic membrane. The preparation method comprises the following steps: applying a polysilazane solution to a porous substrate for the first time, and then performing first pyrolysis to obtain a pyrolysis material; and applying a polysilazane solution on the pyrolysis material for the second time, and then carrying out second pyrolysis to obtain the recrystallized silicon carbide-silicon carbonitride ceramic membrane. According to the invention, a solution containing propargyl polysilazane or organic polysilazane Durazane 1500 quick-drying resin is used as a precursor to prepare the ceramic membrane, and the ceramic membrane has the advantages of high ceramic yield, excellent high-temperature stability, high retention rate and controllable microstructure, and is suitable for separation and protection application in extreme environments.

The invention discloses a preparation method of a low-cost in-situ doped silicon nitride fiber, which comprises the following steps: taking one or two of vinyl liquid polycarbosilane and vinyl polysilazane as a precursor, adding a boron monomer, an organic solvent and metallocene, and doping to prepare a doped silicon nitride fiber containing boron, titanium, hafnium, zirconium and other elements; carrying out melt spinning on the doped precursor to obtain a doped precursor; then boron-containing active gas introduced in the crosslinking process can be combined with active sites on the surface of the protofilament fiber or directly deposited on the surface of the fiber; and finally, the boron-containing active gas reacts with ammonia gas in the high-temperature sintering process to generate a boron nitride (BN) surface coating. Thus, the temperature resistance of the silicon nitride fiber is improved, the problem that a coating of a prefabricated body of a silicon nitride fiber ceramic matrix composite material with a complex structure is not uniform is solved, meanwhile, high cost of a secondary coating and large damage to the fiber are avoided, the composite material preparation process flow is simplified, and the invention provides the low-cost preparation method for in-situ doping of the silicon nitride fiber.

The invention belongs to the technical field of protective coatings, and particularly relates to a modified polysilazane-based protective coating, a preparation method thereof, a protective coating and application thereof. The modified polysilazane-based protective coating provided by the invention is prepared from the following preparation raw materials in parts by mass: 5.0 to 15.0 parts of polysilazane, 1.0 to 5.0 parts of a low-surface-energy compound, 1.0 to 5.0 parts of a hydrophilic compound, 1.0 to 5.0 parts of a silane coupling agent, 0.01 to 0.1 part of an initiator and 60.0 to 80.0 parts of a dispersion medium, both the low-surface-energy compound and the hydrophilic compound contain groups for free radical polymerization reaction. A protective coating formed by the protective paint provided by the invention has good environmental adaptability, and can simultaneously realize multiple effects of friction resistance, corrosion resistance, adhesion resistance, biological fouling resistance and the like when used under harsh working conditions (air / underwater environment).

The invention relates to the technical field of protective coatings, and discloses a preparation method of a thermal protective coating on the surface of a basalt fiber composite material, and the preparation method comprises the following steps: preparing a thermal protective coating, spraying the thermal protective coating and curing the coating, the thermal protective coating is a polysilazane thermal protective coating, and the thermal protective coating is sprayed by adopting a gas spray gun. According to the preparation method of the thermal protection coating on the surface of the basalt fiber composite material, a relatively simple construction process is utilized, the thermal protection coating with excellent performance and controlled construction can be prepared, and the prepared polysilazane thermal protection coating and the resin-based basalt fiber composite material are attached to the surface of a matrix through molecular bonds and chemical bonds, so that the thermal protection coating can be applied to the surface of the resin-based basalt fiber composite material. The coating can meet the erosive wear at high temperature, meanwhile, under the working conditions of strong scouring and short-time aerodynamic scouring and ablation, the coating cannot be separated from a composite material matrix, and the coating has the performance of high temperature resistance and erosive wear resistance.

The invention belongs to the technical field of nano material preparation, and particularly relates to a silicon nitride nanowire and a preparation method thereof. Comprising the following steps: (1) mixing vinyl polysilazane and acrylic acid 2-isocyano ethyl ester, and carrying out stirring reaction under a vacuum condition to obtain A-PSZ; (2) the A-PSZ is put into a vacuum drying oven to be subjected to thermocuring treatment, and cured A-PSZ is obtained; (3) putting the cured A-PSZ into a tubular furnace, and introducing N2 to carry out pyrolytic reaction; and (4) taking out the sample after the pyrolytic reaction, collecting a product generated on the surface of the sample, and sequentially carrying out acid washing and alkali washing treatment to finally obtain the silicon nitride nanowire. According to the method, acrylate modified polysilazane is taken as a raw material, precursor pyrolysis and carbon thermal reduction are combined, the prepared silicon nitride nanowire is high in purity and uniform in morphology, meanwhile, a catalyst and a toxic and harmful nitrogen source do not need to be used in the preparation process, and the method is environmentally friendly and suitable for large-scale industrial production.

The invention discloses a high-temperature-resistant high-stripping organic silicon pressure-sensitive adhesive and a preparation method thereof, and relates to a pressure-sensitive adhesive and a preparation method thereof. The invention aims to solve the problems of insufficient temperature resistance, low peel strength and poor binding force with a base material of the existing organic silicon pressure-sensitive adhesive. According to the invention, phenyl siloxane rubber, hydroxyl-terminated polysiloxane and methyl vinyl MQ silicon resin are used as basic raw materials, and polysilazane is used as a heat-resistant modifier to carry out heat-resistant modification on the chemical structure of the pressure-sensitive adhesive; a trifunctional allyl silane monomer is added in the film preparation process, so that the crosslinking density of the system is improved, and the heat resistance of the pressure-sensitive adhesive is further improved; the bonding force between the pressure-sensitive adhesive and a polyimide substrate is improved by adding the peroxysilane coupling agent, and the use of a primer in the coating process is omitted; by adding the hydroxyl MQ silicon resin and the phosphate adhesion promoter, the bonding strength of the pressure-sensitive adhesive is improved, and the high-temperature-resistant and high-stripping organic silicon pressure-sensitive adhesive is prepared. According to the invention, the high-temperature-resistant and high-stripping organic silicon pressure-sensitive adhesive can be obtained.

Provided is a novel cross-linked polysilazane which is capable of forming a silicon-containing film having excellent crack resistance while being capable of forming a thick film. The invention relates to cross-linked polysilazane with a certain structure.

The invention relates to the technical field of coatings, and discloses a polysilazane-graphene composite electrical equipment insulating and pressure-resistant protective coating and a preparation method thereof. The flame-retardant coating is prepared from the following raw materials in parts by mass: 30 to 50 parts of polysilazane, 3 to 5 parts of telomer, 1 to 3 parts of synergist, 4 to 5 parts of modified silicon dioxide, 4 to 5 parts of modified graphene, 1.5 to 2 parts of multiwalled carbon nanotube, 0.5 to 2 parts of modified zinc oxide, 1 to 2 parts of fluorocarbon surfactant and 130 to 230 parts of tetrahydrofuran. By introducing the telomer, the adhesive force of the coating on a rusty surface is effectively improved, and the properties of high temperature resistance, insulation and pressure resistance, flame retardance, water resistance, ice condensation resistance and the like are enhanced; by introducing the synergist, the modified silicon dioxide, the modified graphene, the multi-walled carbon nanotubes and the modified zinc oxide, the protection capability is further improved. Therefore, the coating disclosed by the invention is excellent in comprehensive protection performance, can meet the long-term operation requirement of power equipment in a complex and severe environment, and is wide in application prospect.

The invention discloses a water-based poly-ceramic coating material as well as a preparation method and application thereof. The formula comprises a composite base material (40-45 parts of modified waterborne polyurethane resin and 15-20 parts of a waterborne acrylic emulsion), a synergistic curing system (10-12 parts of a blocked isocyanate curing agent and 0.8-1.2 parts of a latent organic zinc salt accelerant), an organic-inorganic reinforced phase (10-15 parts of nano silicon dioxide and 8-10 parts of polysilazane) and a functional aid. The base material and the cosolvent cooperate to make VOCs less than or equal to 30 g / L, a curing system cooperates to realize low-temperature rapid curing, organic-inorganic components cooperate to form a poly-ceramic structure, the coating is adaptive to an existing roll aluminum production line, and the problems of environmental protection, energy conservation and performance of a traditional coating are solved.

The invention relates to the technical field of aerogel composite materials, and discloses an aerogel composite fiber material and a preparation method and application thereof.The aerogel composite fiber material comprises, by weight, 15-50% of polysilazane fibers and 50-85% of a silicon dioxide aerogel matrix, the polysilazane fibers and the silicon dioxide aerogel matrix are connected through Si-O-Si chemical bonding, and an inert passivation layer is arranged at the interface of the two. The preparation method comprises the following steps: immersing the polysilazane fiber in silicon source precursor sol to carry out in-situ catalytic gelation; carrying out gas phase treatment on the obtained alcogel composite material, and forming an inert passivation layer on the surface of the fiber by utilizing a generated by-product; and carrying out normal-pressure drying on the composite material subjected to gas phase treatment. Through in-situ catalysis and interface self-passivation design, the interface bonding strength and the mechanical property of the material are remarkably enhanced, normal-pressure drying of the material is achieved through gas phase treatment, the process is simplified, and the production cost is reduced.

The invention provides a high-voltage-resistant polysilazane-based insulating material for a power battery pack of a new energy automobile and a preparation method of the high-voltage-resistant polysilazane-based insulating material, and belongs to the technical field of insulating materials. The silicon carbide microspheres are prepared through reaction of polycarbosilane and polyaniline, and through hydrothermal deposition of molybdenum disulfide and coating of organic boron, the heat-conducting property, the electrical insulating property and the flame retardant property of the silicon carbide microspheres are improved; secondly, the prepared metal organic supramolecular cage is subjected to carbon nitride modification and surface modification, so that the thermal conductivity, the interface bonding force and the dielectric property of the metal organic supramolecular cage are improved; in addition, the carbon nanotubes are subjected to acid treatment, rare earth lanthanum modification and boron nitride compounding, so that the dispersity, the thermal conductivity and the insulating property of the carbon nanotubes are remarkably improved; through the synergistic effect of all the components, the thermal performance, the electrical performance and the mechanical performance of the composite material are comprehensively optimized.

The invention relates to the technical field of ceramic materials, and discloses a nitrogen-rich Si-Zr-N precursor, a nitrogen-rich amorphous SiZrN ceramic preparation method and a nitrogen-rich Si-Zr-N. The preparation method comprises the following steps: mixing perhydropolysilazane and tetrakis (dicarboxamide) zirconium, and then carrying out low-temperature liquid ammonia crosslinking and room-temperature ammonification to obtain the nitrogen-rich Si-Zr-N precursor. According to the preparation method of the nitrogen-rich amorphous SiZrN ceramic, high-temperature ammonolysis is carried out on a nitrogen-rich Si-Zr-N precursor, and the nitrogen-rich amorphous SiZrN ceramic is obtained. According to the invention, the nitrogen content of the precursor is increased through the molecular-level structure design, so that the formation of the high-nitrogen-ratio amorphous ceramic is facilitated; the pyrolysis path can be regulated and controlled, the product structure is compact, the components are uniform, and the problem of uneven mixing or incomplete reaction in the traditional method is avoided; the precursor is high in universality, is suitable for various processing and pyrolysis modes, and has good application expansibility; the cost is controllable and the method is environment-friendly.

The invention relates to a ceramic composite diaphragm as well as a manufacturing method and application thereof. The method for manufacturing the ceramic composite diaphragm comprises the following steps: (1) mixing at least two of a rare earth oxide, a metal organic framework material and glass powder, polysilazane resin and an organic solvent to obtain precursor slurry, the polysilazane resin comprising hyperbranched polysilazane resin; (2) performing electrostatic spinning on the precursor slurry to obtain a precursor film; and (3) sequentially carrying out ultraviolet light crosslinking, plasma treatment and curing treatment on the precursor membrane to obtain the ceramic composite diaphragm.

The present invention relates to a high-strength and stable sealing material for solid oxide fuel cells and its application. The high-strength and stable sealing material for solid oxide fuel cells includes: glass powder modified by surface polysilazane and ceramic powder modified by surface polysilazane; the content of the ceramic powder modified by surface polysilazane is 5-30 wt%; the content of the glass powder modified by surface polysilazane is ≥70 wt%.

The invention belongs to the technical field of special ceramic preparation, and particularly relates to high-strength special ceramic and a preparation method thereof. The high-strength special ceramic is prepared from the following raw materials: alumina powder, quartz powder, serpentine, phosphorus slag, eucryptite, barium borate, nano yttrium trifluoride, nano hafnium boride, nano strontium zirconate, nano lanthanum titanate and polyborosilazane. According to the high-strength special ceramic disclosed by the invention, the aluminum oxide powder, the quartz powder, the serpentine and the phosphorus slag are taken as matrix raw materials, eucryptite, barium borate and yttrium trifluoride are taken as fluxing agents, and nano hafnium boride, nano strontium zirconate, nano lanthanum titanate and polyborosilazane are taken as fillers, so that the prepared special ceramic has excellent bending strength and fracture toughness.

The invention relates to the field of new energy automobile power battery shell protection, and particularly discloses a high-temperature-resistant UV insulating coating applied to a new energy battery and a preparation method of the high-temperature-resistant UV insulating coating. The high-temperature-resistant UV insulating coating applied to the new energy battery is prepared from the following raw materials in parts by mass: 10 to 30 parts of polyurethane modified acrylic resin, 15 to 40 parts of polysilazane modified acrylic resin, 20 to 30 parts of epoxy acrylic resin, 10 to 30 parts of monofunctional acrylic monomer, 10 to 20 parts of bifunctional acrylic monomer and 5 to 10 parts of polyfunctional acrylic monomer, 5-10 parts of a modified polyacrylonitrile copolymer, 1-5 parts of fumed silica, 1-5 parts of a photoinitiator, 1-5 parts of a pigment, 1-5 parts of a dispersant, 1-5 parts of an antifoaming agent and 1-5 parts of a leveling agent; the preparation method comprises the following steps: sequentially adding the raw materials into a stirring kettle, and fully and uniformly stirring. The high-temperature-resistant UV insulating paint applied to the new energy battery has the advantage that the defect that the high-temperature-resistant performance of the UV insulating paint is still insufficient during use can be overcome.

The invention relates to a fully-degradable PLA composite material with ceramic characteristics and a preparation method thereof. The fully-degradable PLA composite material is prepared from the following raw materials in percentage by weight: 25-45% of PLA, 5-13% of PBS, 48-60% of a filling agent and the balance of a processing aid, the filler is obtained by modifying an inorganic filler through a modifier; the modifier is prepared from methyl hydrogen-containing polysilazane and a bio-based maleic anhydride graft; the bio-based maleic anhydride graft is a composition of one or more of maleic anhydride grafted poly (butylene adipate-co-terephthalate), maleic anhydride grafted polyvinyl alcohol and octenyl succinic anhydride modified starch. Through the synergistic effect of the inorganic components of the filling agent, the proportion of PLA / PBS and the modifier, the filling agent has the advantages that the filling effect is good; the material is matched with the use requirement of the ceramic flying saucer on key indexes, and all components have bio-based or degradable characteristics, so that the dual targets of'ceramic performance bionics' and'environment-friendly controllable degradation 'are achieved.

The present invention belongs to the technical field of functional films, and particularly relates to a UV-protection PVB composite film, a preparation method therefor, and the use thereof. The UV-protection PVB composite film comprises an EVA / PVB composite film formed by an EVA film and a PVB film, wherein an ultraviolet light conversion layer is provided between the EVA film and the PVB film, the EVA film contains an ultraviolet light conversion agent, the PVB film contains an ultraviolet light absorber, and the ultraviolet light conversion layer is formed by coating with a transparent ultraviolet light conversion coating, and contains the ultraviolet light conversion agent, perhydropolysilazane, α-Al2O3 and a solvent. The ultrathin inorganic ultraviolet light conversion layer is designed which uses the perhydropolysilazane as a film-forming substance and the α-Al2O3 as a dispersion aid, and therefore exhibits excellent dispersibility, transparency and durability, thus reducing the use amount of light conversion agents, improving the light conversion efficiency, and solving the problem that light conversion agents added to EVA films are difficult to disperse and thus cannot achieve effective light conversion.

The invention discloses polysilazane containing a perfluorinated branched short chain and a preparation method of the polysilazane. The method comprises the following steps: (1) under the protection of inert gas, adding chlorosilane and a perfluorinated branched short-chain compound into a solvent for reaction to obtain a fluorine-containing chlorosilane monomer; and (2) adding a fluorine-containing chlorosilane monomer and a chlorosilane monomer into a solvent, and carrying out ammonolysis reaction under the protection of inert gas to prepare the fluorine-containing polysilazane. According to the invention, a perfluorinated branched short chain is introduced into polysilazane, so that the polysilazane is endowed with the characteristic of low surface energy, and meanwhile, the problems of toxicity and biological accumulation caused by a long-chain perfluorinated chain segment are avoided.

The invention relates to a large-thickness ultra-low-density high-toughness silicone rubber heat-proof coating as well as a preparation method and application thereof, and belongs to the technical field of heat-proof coatings. The formula of the coating is optimally designed, and purified methyl diphenyl silicone rubber and large, medium and small hollow microspheres with different density sizes in a specific ratio are adopted, so that the high-toughness silicone rubber heat-proof coating is prepared. The silicon rubber heat-proof coating prepared from the silicon rubber, the reinforcing filler, the cork powder, the high-temperature-resistant antioxidant filler, the glass fiber, the tetraalkoxysilane, the polysilazane and the like is high in lightweight degree, good in toughness, capable of being sprayed in a large-thickness mode and good in ablation resistance, and the silicon rubber heat-proof coating passes ablation tests of a quartz lamp with the highest heat flux of 90 KW / m < 2 > in the CO2 atmosphere and a wind tunnel. Compared with the prior art, the high-strength and high-toughness coating has the advantages that the high-strength and high-toughness coating is low in density and better in toughness, the density is as low as 0.24-0.28 g / cm < 3 >, the elongation at break is as high as 15%-25%, and the high-strength and high-toughness coating can be sprayed in a large-thickness manner, is good in environmental adaptability and

The invention discloses a high-temperature-resistant and high-insulation composite material for an integrally-formed inductor and a preparation method of the high-temperature-resistant and high-insulation composite material, and relates to the technical field of composites.The composite material comprises alloy powder, an insulation material and a coating material, the surface of the alloy powder is coated with the insulation material, and the alloy powder with the surface coated with the insulation material is coated with the coating material; the insulating material is polysilazane, the coating material comprises cyanate ester resin and epoxy resin, and the technical problems that traditional organic coating is prone to decomposition, moisture absorption and aging and poor in interface bonding effect with metal alloy powder can be solved.