34 results about "Zirconia silica" patented technology

The chromium-free refractory material for RH vacuum furnace lining consists of one or several of magnetize, magnesia zirconia and magnesia zirconia silica 88-97 wt%, fine zirconia powder 1-6 wt%, fine zircon powder 0-9 wt%, and organic binding agent 1-3 wt%. It has the chemical composition of MgO 80-90 wt%, SiO2 1-4 wt%, and ZrO2 7-13 wt%. The organic binding agent is binding agent commonly for refractory material, such as sodium humate, calcium lignosulfonate, dextrin and Arabic gum. The MgO-SiO2-ZrO2 chromium-free refractory material has high slagging resistance and is significant for RH vacuum furnace to obtain long service life.

An electrode, a method of producing the same, and a fuel cell including the electrode are disclosed. The electrode includes: a support; and a catalyst layer formed on the support, the catalyst layer includes: a support catalyst; and a proton conductor having an amorphous phase greater than about 60% by weight. The proton conductor includes: at least one material from the group of B₂O₃, ZrO₂, SiO₂, WO₃, and MoO₃; and P₂O₅, the proton conductor being 0.5-60 parts by weight where the support catalyst is 100 parts by weight. The proton conductor can be synthesized at a low enough temperature so that it can be applied to the support with catalyst particles to form a catalyst layer. The coated proton conductor is in a solid state so the fuel cell is stable over time and it does not obstruct a fuel gas so that the catalyst can be more efficiently used.

The invention discloses a small-particle-diameter praseodymium zirconium yellow ceramic pigment which comprises the following components in percentage by weight: 3-6% of praseodymium oxide, 48-62% of zirconium oxide, 30-38% of silicon dioxide and 3-8% of a mineralizing agent, wherein the zirconium oxide selects the product which does not remove hafnium elements in the zirconium oxide production process, wherein the atom molar ratio of zirconium oxide to the hafnium elements is greater than 40:1; silicon dioxide selects silicon dioxide aerogel, wherein the BET specific surface area is 500-800 m<2>/g, the average particle diameter is 3-8 [mu]m, and the pore volume is 3-5. The praseodymium zirconium yellow pigment is small in particle diameter and relatively stable in structure, and is hard to damage in the ceramic ink preparation process. Meanwhile, the pigment is high in color strength in transparent glaze, and fine and smooth in color tone, and can be used as the high-grade ceramic pigment.

The invention discloses a method for preparing alpha-phenethyl alcohol by taking a zirconia-silica/graphene hybrid material as a catalyst and belongs to the technical field of chemical synthesis. The method comprises the following steps: by taking acetophenone as a raw material under normal pressure, taking alcohol as a hydrogen source and a solvent, and taking the zirconia-silica/graphene hybrid material as a catalyst, reacting at the reaction temperature of 45-90 DEG C for 2-10 hours, rectifying the reaction solution after the reaction is ended, taking the fraction at the temperature of 105-115 DEG C, thereby obtaining the alpha-phenethyl alcohol. According to the method disclosed by the invention, the zirconia-silica/graphene hybrid material is taken as the catalyst, the hybrid material is prepared by adding silica and doping graphene by virtue of an aerogel mode, the specific surface area and pore size of the catalyst are improved, dispersion of the surface active center is promoted, and the activity of the catalyst is increased. The catalyst is high in selectivity and high in water resistance, is easily separated in the reaction solution and can be repeatedly utilized after separation, the operation is convenient, and the preparation cost is reduced, so that the economic benefits are improved.

The invention discloses zirconia-silica gel liquid-phase chromatographic packing. According to the packing, the surface of a zirconia-silica gel matrix is modified with D-fructose-1,6-bis(dihydrogen phosphate). Compared with the conventional adenosine monophosphate modified zirconia-silica gel chromatographic packing, the packing provided by the invention has a better chromatographic separation property under a hydrophilic action mode. Compared with the prior silica-gel-matrix liquid-phase chromatographic packing, the material provided by the invention has good chemical stability, can be stably used in a pH range of 1-14, and has a better application prospect.

The invention discloses a porous metal oxide-silica gel liquid chromatogram filling material, and a preparation method thereof. According to the preparation method, the surface of a zirconia-silica gel, titanium oxide-zirconia-silica gel, or titanium oxide-silica gel matrix is modified with D-glucose-6-phosphate groups or D-fructose-1, 6-diphosphate groups, and fosfomycin sodium is adopted for endcapping processing. Compared with conventional adenosine monophosphate group or fructose bisphosphate group modified zirconia-silica gel chromatogram filling materials, the advantages are that: at hydrophilic effect mode, the porous metal oxide-silica gel liquid chromatogram filling material possesses better chromatogram separation performance; compared with conventional silica gel surface saccharide group modification method, the preparation method is simpler, and is friendly to the environment; the silica gel microspheres modified with metal oxides such as zirconia and titanium oxide can beused steadily at a pH value range of 1 to 14; and the application prospect is promising.

The present invention relates to a sintered concrete having the following mean chemical composition, as mass percentages on the basis of the oxides and for a total of 100%:

• • ZrO₂: 55 to 70%,
  • SiO₂: 25 to 40%,
  • P₂O₅: 0.2 to 9.0%,
  • Al₂O₃: 0.5 to 7.0%,
  • CaO: >0.2%,
  • CaO+MgO+B₂O₃+Fe₂O₃: 0.2 to 10.0%,
  • MgO+B₂O₃+Fe₂O₃: ≤7.5%,
  • B₂O₃+MgO: ≤4.5%,
  • ZrO₂+SiO₂+P₂O₅+Al₂O₃+CaO+MgO+B₂O₃+Fe₂O₃: ≥95.0%,

and containing more than 70% of zircon, as a mass percentage on the basis of the mass of the crystalline phases.

The invention discloses aluminum oxide ceramic for a new energy automobile, which comprises the following components in percentage by weight: 90 to 95 percent of aluminum oxide, 2 to 5 percent of silicon carbide whisker, 2 to 5 percent of yttrium-stabilized zirconium oxide, 2 to 5 percent of silicon dioxide, 2 to 5 percent of titanium dioxide, 2 to 5 percent of nickel oxide and 1 to 5 percent of strontium carbonate. The catalyst comprises the following components in percentage by weight: 1 to 2wt% of silicon dioxide, 0.5 to 1wt% of titanium dioxide, 0.1 to 0.3 wt% of nickel oxide and 0.3 to 0.8 wt% of strontium carbonate. By adjusting the formula of the aluminum oxide ceramic, especially by adding the silicon carbide whiskers, the aluminum oxide ceramic piece prepared from the new material has the strength of 95 aluminum oxide ceramic and also has excellent explosion-proof performance. The material has good adsorbability to a coating on the surface of ceramic, and is an ideal material for high-power and high-current ceramic tubes.

The invention discloses a preparation method of matte PET release paper. The preparation method includes: firstly, carrying out pulp blending, papermaking, paper forming and other steps on fast-growing pine to obtain glassine base paper, then laminating a layer of PET film respectively on the upper surface and lower surface of the glassine base paper, then coating one side of the PET film with a layer of matte agent, and coating the other surface side of the PET film with a layer of release agent so as to obtain the matte PET release paper. According to the invention, by adding zirconium dioxide, silicon dioxide and an ultraviolet absorber into the matte agent, a very good absorption effect on ultraviolet rays can be achieved, also micron-sized zirconium dioxide and silicon dioxide have very good refraction effect on ultraviolet rays of different wavelengths, so that the obtained matte PET release paper has a very good matte effect. The matte PET release paper prepared by the preparation method disclosed by the invention has a good matte effect, and also after curling, the release agent on the release surface does not easily transfer to the matte surface, and local sagging phenomenon cannot be caused.

The invention relates to the technical field of photo album manufacturing, and particularly discloses an anti-corrosion photo album and a production process thereof. The anti-corrosion photo album comprises a photo album cover, the photo album cover is coated with an anti-corrosion layer, and the anti-corrosion layer is mainly prepared from, by weight, 30-50 parts of a binder, 15-20 parts of a filler, 3-5 parts of a coupling agent and 0.5-2 parts of a defoaming agent. The binder comprises cyanoacrylate and chitosan, the filler comprises zinc silicate, titanium dioxide, barium phosphate, zirconium oxide and silicon dioxide, the coupling agent is a silane coupling agent, and the defoaming agent is prepared from dimethyl silicone oil and polyether according to the mass ratio of (3-5): (2-3). The anti-corrosion photo album has the advantage of being good in anti-corrosion performance.

The invention relates to the technical field of gutta-percha points, in particular to a biological ceramic gutta-percha point. The biological ceramic gutta-percha tip comprises the following components: natural rubber, zinc oxide, barium sulfate, zirconium oxide, silicon dioxide, an antioxidant, a bioactive material and a pigment. The biological ceramic gutta-percha tip has good biocompatibility, the micro-gap and micro-leakage phenomena between the gutta-percha tip and filling paste are avoided, the developing effect is improved, and the brightness is improved by 20%; the bone regeneration inducing function is realized;

The invention discloses a preparation method of a zirconium dioxide-silicon dioxide composite adsorption material. SiO2 sol and ZrO2 sol are respectively prepared, then, the SiO2 sol and the ZrO2 sol are mixed and dried and are calcined at a certain temperature to obtain the ZrO2-SiO2 composite adsorption material. ZrO2 with a catalytic action is imported into a common SiO2 material to improve both the adsorption speed of an SiO2 material and the adsorption rate of the SiO2 material. The method is simple and has a good practical value.

The invention discloses composite solid acid as well as a preparation method and application thereof. The preparation method of the composite solid acid disclosed by the invention comprises the following steps: adding an oxide and a fluoride into water, filtering to obtain a solid, and heating the obtained solid at the temperature of 150-350 DEG C for 12-100 hours to obtain the composite solid acid, wherein the oxide is one or more of magnesium oxide, aluminum oxide, zinc oxide, iron oxide, copper oxide, titanium dioxide, zirconium dioxide, silicon dioxide, diatomite and montmorillonite; and the fluoride is one or more of magnesium fluoride, calcium fluoride, zinc fluoride, copper fluoride and aluminum fluoride. The composite solid acid can be applied to preparation of difluoroacetate compounds, and the preparation method is high in atom economy, simple in preparation step, suitable for continuous channelization reaction in preparation process, safe in technological process, short in reaction time, high in yield and few in three wastes, and is an environment-friendly preparation method.

The invention relates to a preparation method of a zirconia sol-reinforced magnesium aluminate spinel porous ceramic. The zirconia sol-reinforced magnesium aluminate spinel porous ceramic is obtainedby taking activated light calcined magnesia powder and activated alumina powder as powder materials, zirconia sol as a a reinforcing agent and water as a solvent, adding sodium dodecyl benzene sulfonate (SDS) as a foaming agent, dextrin as a foam stabilizer and carboxymethyl cellulose (CMC) as a thickening agent, and carrying out mixing, foaming, molding, drying and sintering. The zirconia sol-reinforced magnesium aluminate spinel porous ceramic is prepared with a foaming method which is simple in process; the zirconia sol is introduced into a magnesium aluminate spinel porous ceramic; and thestrength of the porous ceramic is enhanced by forming nano-zirconia particles on the hole walls, so that the magnesium aluminate spinel porous ceramic with the high strength and the high porosity isobtained.