1089 results about "Barium oxide" patented technology

A catalyst system and a method for reducing nitrogen oxides in an exhaust gas by reduction with a hydrocarbon or oxygen-containing organic compound reducing agent are provided. The catalyst system contains a silver catalyst and a modifier catalyst, where the modifier catalyst contains a modifier oxide, where the modifier oxide is selected from the group consisting of iron oxide, cerium oxide, copper oxide, manganese oxide, chromium oxide, a lanthanide oxide, an actinide oxide, molybdenum oxide, tin oxide, indium oxide, rhenium oxide, tantalum oxide, osmium oxide, barium oxide, calcium oxide, strontium oxide, potassium oxide, vanadium oxide, nickel oxide, tungsten oxide, and mixtures thereof. The modifier oxide is supported on an inorganic oxide support or supports, where at least one of the inorganic oxide supports is an acidic support. The catalyst system of the silver catalyst and the modifier catalyst provides higher NO_x conversion than either the silver catalyst or the modifier catalyst alone.

A chip antenna 10 includes, inside a rectangular-parallelepiped base 11 having barium oxide, aluminum oxide, and silica as main constituents, a conductor 12 wound in a spiral form along the length direction of the base 11, and an LC parallel resonance circuit 13, which is inserted in the intermediate portion of the conductor 12 and which is connected electrically in series with the conductor 12, and includes, on the surface of the base 11, a power-feeding terminal 14 for applying a voltage to the conductor 12. The conductor 12 is separated into a first conductor 121 and a second conductor 122 by the LC parallel resonance circuit 13. The LC parallel resonance circuit 13 is formed of a coil L1, which is an inductance element, and a capacitor C1, which is a capacitance element, which are connected in parallel.

A single-layered three-way catalytic converter containing palladium as the only catalytically active noble metal, with high activity and heat resistance. The catalyst contains, in addition to finely divided, stabilized aluminum oxide, at least one finely divided cerium/zirconium mixed oxide and optionally finely divided nickel oxide as well as highly dispersed amounts of cerium oxide, zirconium oxide and barium oxide. The palladium is distributed largely uniformly throughout the entire catalyst.

A composition which is useful for producing profiles and cable insulation which retain their function in the event of fire, comprise peroxidically crosslinking or condensation-crosslinking silicone rubber, metal oxides selected from magnesium oxide, aluminum oxide, tin oxide, calcium oxide and barium oxide and metal compounds of this class which produce oxides on heating, boric acid, zinc borate, and a platinum complex having at least one unsaturated group.

Certain example embodiments relate to seals for glass articles. Certain example embodiments relate to a composition used for sealing an insulted glass unit. In certain example embodiments the composition includes vanadium oxide, barium oxide, zinc oxide, and at least one additional additive. For instance, another additive that is a different metal oxide or different metal chloride may be provided. In certain example embodiments, a composition may be combined with a binder solution that substantially or completely burns out by the time the composition is melted. In certain example embodiments, a CTE filler is included with a frit material. In certain example embodiments, a vacuum insulated glass unit includes first and second glass substrates that are sealed together with a seal that includes the above-described composition.

The invention discloses a method for preparing a silicon-free or low-silicon acidproof ceramic fracturing propping agent, which comprises the following steps of: (1) preparing the following raw materials in percentage by weight: 30 to 95 percent of alumina, 5 to 70 percent of barium carbonate and 0 to 10 percent of sintering aid, wherein the sintering aid is one or more of titanium dioxide, boric acid, calcium carbonate, magnesium oxide and dolomite; (2) performing ball milling on the raw materials in the step (1) in a ball mill for 24 to 48 hours; (3) preparing the raw materials obtained in the step (2) into semi-finished product particles; and (4) sintering the semi-finished product particles obtained in the step (3) at the temperature of between 1,500 and 1,800 DEG C for 1 to 3 hours, and cooling to the room temperature. The method has simple process; the barium carbonate is decomposed at high temperature to generate barium oxide, and the barium oxide is fully reacted with alumina to generate stable barium aluminate; and the barium aluminate has strong acidproof performance and protects other components in the finished product against corrosion of acid liquor, so the acidproof performance of the finished product is greatly improved.

A sintering aid for a low-temperature cofired medium ceramic material is composed of, by weight, 31%-45% of silicon dioxide, 1%-10% of boron oxide, 5.1%-10% of zinc oxide, 18%-30% of aluminum oxide, 11%-24% of alkaline earth metallic oxide and 5%-15% of oxide with the general formula of R2O3, wherein R refers to at least one of lanthanum, cerium, praseodymium, neodymium, samarium, europium and dysprosium, and the alkaline earth metallic oxide refers to one of magnesium oxide, calcium oxide, barium oxide and strontium oxide. Adding the sintering aid into the low-temperature cofired medium ceramic material enables the prepared low-temperature cofired medium ceramic to have excellent thermal mechanical performance and dielectric performance. In addition, the invention provides the low-temperature cofired medium ceramic material and application thereof and a method for preparing the low-temperature cofired medium ceramic.

A process for the preparation of an organosilicon condensate which comprises reacting together a silicon containing compound having at least one silanol group and a silicon containing compound having at least one —OR group or at least one silanol group (or a compound having both groups) in the presence of strontium oxide, barium oxide, strontium hydroxide or barium hydroxide and optionally a solvent such as water, methanol, ethanol, 1-propanol, 2-propanol, 1-butanol and 2-butanol, acetone or toluene.

The present invention provides a glass flake that is substantially free of boron trioxide (B₂O₃), barium oxide (BaO), zinc oxide (ZnO), and fluorine (F) and has sufficient heat resistance and good formability for glass flake. The glass flake of the present invention includes a glass composition that contains the following components, expressed in mol %; 50≦SiO₂≦65; 4≦Al₂O₃<12; 5≦SrO≦25; 10<(MgO+SrO)≦30; 20≦(MgO+CaO+SrO)≦45; and 0<(Li₂O+Na₂O+K₂O)<2; wherein the glass composition is substantially free of B₂O₃, BaO, ZnO, and F. This glass flake is useful for resin compositions, paints, cosmetics, ink compositions, and the like.

The invention relates to an alkali-free aluminoborosilicate glass having a coefficient of thermal expansion alpha20/300 of between 2.8.10-6/K and 3.6.10-6/K, which has the following composition (in % by weight, based on oxide): silicon dioxide (SiO2)>58-65, boric oxide (B2O3)>6-11.5, aluminum oxide (Al2O3)>20-25, magnesium oxide (MgO) 4-<6.5, calcium oxide (CaO)>4.5-8, strontium oxide (SrO) 0-<4, barium oxide (BaO) 0.5-<5, with strontium oxide (SrO)+barium oxide (BaO)>3, zinc oxide (ZnO) 0-<2, and which is highly suitable for use as a substrate glass both in display technology and in thin-film photovoltaics.

The invention relates to a green body of red soil ceramic. The green body of the red soil ceramic is prepared from the following raw materials: red soil, quartz, talc, limestone and dolomite; the transmutation glaze of the red soil ceramic is prepared from the following raw materials: potassium feldspar, albite, calcium oxide, barium oxide, kaolin, quartz powder, sodium tripolyphosphate, titaniumoxide, rutile, zinc oxide and a coloring agent. By addition of other mineral raw materials, chemical raw materials and the like, the physical performance and the chemical performance of the green body are changed and the technical problems that the green body glaze of the red soil product is difficult to combine and the product is loose and fragile are solved; the firing temperature of the glaze is reduced from 1,310 DEG C to 1,230 DEG C, so thatthe firing temperature is reduced by 80 DEG C, the using amount of the fuel and the discharge quantity of harmful gas are reduced, environmental protection is contributed and production cost is greatly saved; and by development of the lead-free transmutation glaze, the lead-free transmutation glaze is suitable for being combined with the green body of the red soil ceramic, so that the problem of pollution to the ceramic decorative environment is solved fundamentally.

To obtain a SEM capable of both providing high resolution at low acceleration voltage and allowing high-speed elemental distribution measurement, a SE electron source including Zr—O as a diffusion source is shaped so that the radius r of curvature of the tip is more than 0.5 μm and less than 1 μm, and the cone angle α of a conical portion at a portion in the vicinity of the tip at a distance of 3r to 8r from the tip, is more than 5° and less than (8/r)°. Another SE electron source uses Ba—O and includes a barium diffusion supply means composed of a sintered metal and a barium diffusion source containing barium oxide.

Certain example embodiments relate to seals for glass articles. Certain example embodiments relate to a composition used for sealing an insulted glass unit. In certain example embodiments the composition includes vanadium oxide, barium oxide, zinc oxide, and at least one additional additive. For instance, another additive that is a different metal oxide or different metal chloride may be provided. In certain example embodiments, a composition may be combined with a binder solution that substantially or completely burns out by the time the composition is melted. In certain example embodiments, a vacuum insulated glass unit includes first and second glass substrates that are sealed together with a seal that includes the above-described composition.

An LED lamp includes a light source configured to emit radiation with a peak intensity at a wavelength between about 250 nm and about 550 nm; and a phosphor composition configured to be radiationally coupled to the light source. The phosphor composition includes particles of a phosphor of formula I, said particles having a coating composition disposed on surfaces thereof;

((Sr_1−zM_z)_1−(x+w)A_wCe_x)₃(Al_1−ySi_y)O_4+y+3(x−w)F_{1−y−3(x−w)}  I

wherein the coating composition comprises a material selected from aluminum oxide, magnesium oxide, calcium oxide, barium oxide, strontium oxide, zinc oxide, aluminum hydroxide, magnesium hydroxide, calcium hydroxide, barium hydroxide, strontium hydroxide, zinc hydroxide, aluminum phosphate, magnesium phosphate, calcium phosphate, barium phosphate, strontium phosphate, and combinations thereof; and

• • A is Li, Na, K, or Rb, or a combination thereof;
  • M is Ca, Ba, Mg, Zn, or a combination thereof; and
  • 0<x≦0.10, 0≦y≦0.5, 0≦z≦0.5, 0≦x≦x.

A process for preparing lead-free glass powder used for electronic paste, which comprises: firstly uniformly mixing silicon dioxide or sodium silicate, barium oxide or barium carbonate, boron oxide or boric acid, bismuth oxide or bismuth sulfate, aluminum oxide, aluminum sulfate or aluminum silicate, zinc oxide or zinc carbonate, sodium oxide, sodium carbonate or sodium bicarbonate, potassium oxide or potassium carbonate and titanium dioxide, then heating the mixed raw materials to melt, cooling the melted mixture, then grinding into power by a ball grinder, sieving by a sieve of 100-400 eye and lastly drying glass powder to obtain the lead-free glass powder. Because the glass power of the invention does not contain lead oxide (PbO) or compounds of lead oxide (PbO), the invention is harmless in the manufacture process of paste, simultaneously is beneficial for environmental protection, and is convenient for recycling and reusing electronic product modules containing the electronic paste.

The invention provides a method of recovery and reutilization of waste lithium iron phosphate batteries. The method includes (1) separating positive electrode material mixture from the waste lithium iron phosphate batteries; (2) fully dissolving the positive electrode material mixture with sulfuric acid, performing filtration to obtain a first filtrate, adding ammonia water into the filtrate understirring until the pH value of the system is 1.0-1.9, stirring the mixture, and performing filtration to obtain a second filtrate and iron phosphate precipitate; (3) adding barium hydroxide or bariumnitrate into the second filtrate and performing filtration to obtain a third filtrate; (4) adding the third filtrate, the iron phosphate precipitate, a manganese source, a phosphorus source and a carbon source according to the element ratio of a product to be prepared that is lithium-manganese-iron phosphate LiFe<1-x>Mn<x>PO4 to obtain a solution mixture; and (5) subjecting the solution mixture to ball milling, drying and crushing, pre-sintering a product at a first temperature in an inert atmosphere, and sintering the product at a second temperature to obtain the lithium-manganese-iron phosphate positive-electrode material covered with carbon. Through the method, all elements in the waste lithium iron phosphate batteries are recovered and reutilized.

The invention provides a catalyst for preparing isophorone by acetone condensation method. The catalyst is sinter formed by the step that magnesium oxide or nitrate, calcium oxide or nitrate, barium oxide or nitrate, zirconium oxide or nitrate, rare earth metal oxide or nitrate and aluminium oxide are mixed and then sintered at 400-600 DEG C for 4-6 hours. The sinter contains 25.4-46.4% of aluminium element, 3-18% of magnesium element, 1.4-7.1% of calcium element, 0.8-4.2% of barium element, 0.7-1.5% of zirconium element and 0.5-6% of rare earth metal element; wherein the rare earth metal is one or two of lanthanum, cerium and yttrium. The catalyst is used for catalyzing acetone condensation reaction, can effectively improve acetone conversion and selectivity of isophorone and causes the acetone conversion and selectivity of isophorone to respectively reach more than 86% and 65%.

The invention discloses a catalyst for decomposing nitrous oxide and a preparation method of the catalyst. The catalyst is prepared by the deposition precipitation method. The method comprises the processes of preparing a deposit, washing, forming a deposit, activating through the catalyst, etc.; the catalyst comprises active ingredients, a carrier which is zirconium oxide, and additives, wherein the active ingredients include one or more than two of Co, Ni, Fe and Mn; the additives include one or more of cerium oxide, lanthanum oxide and barium oxide. A catalyst activity experiment shows that nitrous oxide can be completely catalytically decomposed into nitrogen and oxygen at the temperature ranging from 450 to 700 DEG C; therefore, the activation temperature is low, and the T50 (reaction temperature under conversion rate of 50%) is about 350 DEG C. The catalyst is high in activity and outstanding in heat resistance, has a wide operation window, and enables the concentration of nitrous oxide in industrial waste gas to be greatly reduced, and therefore, the environmental pollution is decreased; the catalyst is particularly suitable for N2O removal of a nitric plant and an adipic acid plant.

The invention provides a non-crystalline polyamide resin composition with enough transparency and excellent rigidity, mechanical performance, physical performance and heat resistance, and a product thereof. The composition adopts glass filler which is represented by the mass percentage based on oxide, contains 68-72 percent of silicon dioxide (SiO2), 2-5 percent of aluminum oxide (Al2O3), 2-5 percent of boron oxide (B2O3), 2-10 percent of calcium oxide (CaO), 0-5 percent of zinc oxide (ZnO), 0-5 percent of strontium oxide (SrO), 0-1 percent of barium oxide (BaO), 1-5 percent of magnesium oxide (MgO), 0-5 percent of lithium oxide (Li2O), 5-12 percent of sodium oxide (Na2O) and 0-10 percent of potassium oxide (K2O), wherein the total amount of lithium oxide, sodium oxide and potassium oxideis 8-12 percent.

The invention provides a glaze composition for redware products and relates to the technical field of redware. The glaze composition is prepared from the following components in parts by weight: 1-3 parts of copper oxide, 5-9 parts of barium oxide, 4-6 parts of silicon carbide, 25-35 parts of quartz, 10-20 parts of borax, 0.1-0.5 part of graphene, 0.005-0.03 part of ferric oxide, 0.01-0.06 part of titanium carbide, 10-20 parts of dolomite, 5-15 parts of shell and 0.1-1 part of glass. According to the invention, lead material is removed and the quartz and glass are added, the quartz is used for increasing the surface strength of glazing color, the glass is used for increasing smoothness, and the hand feeling is good. The graphene and titanium carbide are added, so that the adsorption capacity among materials is great, and a layer of mesh structure can be formed on the surface of a green body and cannot fall off after firing.

The invention discloses a high-strength low-temperature-sintering glass ceramic bonding agent. The high-strength low-temperature-sintering glass ceramic bonding agent consists of the following raw materials in percentage by mass: 40-49% of silicon dioxide, 5-15% of aluminum oxide, 8-15% of boron oxide, 1-5% of lithium oxide, 6-9% of sodium oxide, 6-9% of potassium oxide, 9-12% of magnesium oxide, 5-11% of calcium oxide, 3-8% of barium oxide, 2-5% of zinc oxide, 3-9% of phosphorous pentoxide and 2-6% of yttrium oxide. The invention further discloses a preparation method and use method of the high-strength low-temperature-sintering glass ceramic bonding agent. The high-strength low-temperature-sintering glass ceramic bonding agent is stable in component and homogeneous; particles of various sizes can be obtained easily; and sintering temperature is low, so that homogeneous packing for abrasive particles can be realized at relatively-low sintering temperature conditions, and therefore the problems of low product qualification rate and unstable performance which are encountered during production of current corundum grinding wheels, especially corundum grinding wheels finer than 400 are solved.