123 results about "Thorium oxide" patented technology

Provided is a tungsten electrode material which uses a material to replace thorium oxide so as to improve the electrode service life as compared to the conventional technique. The tungsten electrode material has a tungsten base and oxide particles dispersed in the tungsten base. The oxide particles are prepared as an oxide solid solution containing in a solid solved state: a Zr oxide and/or a Hf oxide and an oxide of at least one rare earth selected from a group consisting of Sc, Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu.

The invention discloses far infrared energy powder. The far infrared energy powder is prepared from aluminum oxide, silicon dioxide, zirconium sesquioxide, yttrium oxide, ferroferric oxide, magnesium oxide, calcium oxide, potassium trioxide, diboron trioxide, manganese oxide, titanium oxide, thorium oxide and lanthanum oxide. The invention further discloses a preparation process of the far infrared energy powder and a process for manufacturing a nanometer quantum wave insole through the far infrared energy powder. The powder and the process have the advantages that a soft plastic material serves as the body, the far infrared energy powder is added to the body, negative ions and far infrared waves can be released, the magnetic therapy effect is achieved, quite good health care functions are achieved, and good antibacterial performance is also achieved.

The invention discloses a liquid nano-catalysis desulfurizer for a new dry process cement kiln and a preparation method thereof. The liquid nano-catalysis desulfurizer, which is prepared from nano cerium oxide, nano thorium oxide, nano titanium oxide, nano nickel oxide, nano calcium oxide, nano calcium carbonate, carbomite, potassium permanganate, sodium bismuthate, AEO9, octyl phenol polyoxyethylene ether, PEG 200, polymaleic acid, fatty acid polyglycol ester, and diethylene glycol; the allowance is water. In the technical scheme, europium oxide, ferric acetylacetonate and polyoxyethylene ether are added. The desulfurization degree of the liquid nano-catalysis desulfurizer is 100%; sulfur dioxide in smoke gas can be discharged to zero.

The invention provides a preparation method for high-density pure tungsten, pure molybdenum and a tungsten alloy material and a molybdenum alloy material. The method comprises the main steps that firstly, raw material powder is crushed, and crushed powder is obtained; secondly, the crushed powder obtained in the first step is subjected to molding, and blanks are obtained; and thirdly, the blanks obtained in the second step are sintered, and the high-density pure tungsten, pure molybdenum and tungsten alloy material and molybdenum alloy material are obtained. The density of the high-density pure tungsten, pure molybdenum and tungsten alloy material and molybdenum alloy material is 98% or above. The hardness, tensile strength, corrosion resisting capacity, machining performance, hot-working performance and other performance of a product in a sintered state can be effectively improved by improving the density of the blanks in the sintered state. The method is suitable for pure tungsten, pure molybdenum, tungsten-lanthanum oxide alloy, tungsten-cerium oxide alloy, tungsten-thorium oxide alloy and other powder metallurgy products.

The invention relates to a preparation method of sulfide mineral collector. The method comprises the following steps: sodium sulfide and phosphoric acid are weighed according to the mol ratio of 2 to 3:3 to 6 and added into a gas generator; generated gas is collected and charged into a high-pressure reactor charged with 10 to 13 C of fatty alcohol, thorium oxide catalyst or strongly acid cation resin; the mol ratio of the alcohol to gas is kept to be 1 to 2:1.2 to 2.5; the reaction is performed for 6 to 8 h under the condition that the pressure is 12 to 15 MPa and the temperature is 300 to 450 DEG C to obtain liquid mixture; distillate is collected by distillation under normal pressure at 180 to 300 DEG C according to different carbon numbers, and after the refracting index is detected to be qualified, transparent, colorless and adhesive liquid substance with peculiar odor is obtained, which is the sulfide mineral collector. By adopting the sulfide mineral collector, sulphide ore can be efficiently recovered without active agent, the overall recovery of the sulphide ore reaches larger than 89 percent, and the production cost is reduced.

The present invention relates to a process of separating and purifying thorium by solvent extraction, comprising: 1) mixing a thorium enrichment with an inorganic acid to produce a feed; 2) mixing a neutral phosphorus extractant with an organic solvent to obtain an organic phase; 3) extracting from the feed with the organic phase to obtain a loaded organic phase; 4) scrubbing the loaded organic phase with a scrubbing solution and then back-extracting thorium with a stripping solution to obtain a thorium solution; 5) mixing the thorium solution with an oxalate to obtain a precipitate, which is then sintered to obtain thorium oxide. The present process allows to increase the purity of thorium from 80%-99% to 99.99% or more with a yield of more than 98%.

A metal halide lamp comprises a translucent air tight vessel (1) having an arc tube section (11) forming a discharge space (13) and sealing portions (121, 122) formed at the both ends thereof, a discharge medium with which the discharge space is filled, and a pair of electrodes (31, 32) projecting into the discharge space. The discharge medium is composed of a metal halide and rare gas and essentially containing no mercury. The pair of the electrodes is composed of tungsten containing thorium oxide. Protrusions (311, 312) are formed respectively, on the pair of electrodes and arc is formed between them when the metal halide lamp is operated.

The invention relates to a rare-earth modified active carbon catalytic material, which is prepared from the following raw materials in parts by weight: 130 to 140 parts of active carbon, 1 to 3 parts of lanthanum oxide, 1 to 3 parts of thorium oxide, 1 to 3 parts of terbium oxide, 1 to 3 parts of dysprosium oxide, 1 to 3 parts of cerium oxide, 1 to 3 parts of neodymium oxide, 1 to 3 parts of gadolinium oxide, 10 to 13 parts of chitosan, 10 to 13 parts of rectorite, 2 to 3 parts of nano white mica powder, 5 to 8 parts of sodium silicate, 1 to 2 parts of sodium benzoate, 4 to 5 parts of modified diatomite and an appropriate amount of water. The active carbon is loaded with rare-earth metal oxide and nano white mica powder, so that the carbon oxide (CO) can be adsorbed and eliminated at the normal temperature, the conversion rate of the catalytic material on the CO is 99.97 percent, the catalytic activity still can reach 99.2 percent after the catalytic material is continuously used for 600 hours; moreover, the production process is simple, and the preparation cost of the catalyst is low; by utilizing the rectorite, the catalytic material has an ion exchanging function; the rare-earth modified active carbon catalytic material is suitable for catalytically oxidizing the CO and also can be used for purifying the water.

The invention discloses a high fire resistance ceramic tile and a production method thereof. The high fire resistance ceramic tile is formed by the following raw materials of, by weight, 41 to 53 parts of periclase, 34 to 46 parts of cyanite, 27 to 39 parts of diaspore, 13 to 19 parts of aluminum dihydrogen tripolyphosphate, 11 to 17 parts of boride silicon, 10 to 15 parts of waste silica bricks, 2 to 4 parts of thorium dioxide, 5 to 8 parts of hydroxy ethyl methacrylate, 17 to 23 parts of compound clay, 3 to 5 parts ofalpha-olefin sulfonate, 1 to 2 parts of lauramidopropylamine oxide, 2 to 3 parts of anhydrous sodium sulphate and 1 to 2 parts of neopentyl glycol. According to the high fire resistance ceramic tile, the fire resistance is excellent, the refractoriness reaches 1250 DEG C, the strength is high, the abrasion resistance, the chemical corrosion resistance and the cracking resistance are achieved, and the high fire resistance ceramic tile can be widely applied to high fire resistance rating requirements of buildings.

The invention discloses a special toughened high-temperature-resistant ceramic for fuel engine cylinder liners and a preparation method thereof. The special ceramic is prepared from the following raw materials in parts by weight: 42-54 parts of anorthite, 24-36 parts of kyanite, 38-49 parts of zirconite, 22-34 parts of bauxite, 16-22 parts of magnesium oxide, 13-19 parts of molybdenum disilicide, 2-4 parts of lanthanum oxide, 10-15 parts of silicon nitride, 5-10 parts of ferric oxide, 4-7 parts of hafnium boride, 11-17 parts of calcium oxide, 1-3 parts of thorium oxide, 5-8 parts of sorbitol, 2-4 parts of sodium oleate, 4-7 parts of triisopropanolamine, 3-5 parts of carboxymethyl alantin sodium, 10-15 parts of water glass, 8-14 parts of polyvinyl acetate, 3-6 parts of hydroxypropyl distarch phosphate and a right amount of deionized water. The molybdenum disilicide, silicon nitride, hafnium boride and sintering technique are adopted to enhance the heat resistance and toughening performance of the ceramic; abundant stable lanthanum oxide, calcium oxide and thorium oxide stabilizers are utilized to lower the sintering temperature and difficulty; and by using the stabilizers, the high-temperature resistance is up to 2000-2500 DEG C, the high-temperature resistance time is up to 760-850 hours, the toughness KIc is 4-6, and the folding strength is 400-600 MPa.

The invention relates to the field of metal material manufacturing technology, and specifically relates to a negative electrode material for a high intensity discharge lamp and a manufacturing method thereof. The negative electrode material comprises the following components: 1.5%-2.0% of thorium oxide, 0.0020%-0.0080% of potassium and 97%-98% of tungsten. Compared with a conventional negative electrode material, the negative electrode material provided by the invention has the following advantages that (1) thorium oxide particles of a thorium tungsten negative electrode even if 0.0020%-0.0080% of potassium is doped are fine and uniformly distributed; and (2) the thorium tungsten negative electrode contains a trace amount of potassium element, and by adopting the potassium-doped tungsten thorium negative electrode, the growth speed of crystal particles is slow, the tip shape of the electrode can be stably maintained, and the service life of the discharge lamp is prolonged.

The invention discloses an energy-saving type foot warmer. The energy-saving type foot warmer comprises a decoration cover, a pedal plate, a heating body, a supporting device and a base. The heating body is arranged on the periphery of the pedal plate, and the decoration cover is arranged on the periphery of the pedal plate. The supporting device is placed below the pedal plate, and the decoration cover, the pedal plate, the heating body and the supporting device are fixedly connected in sequence through a fastener and then are arranged in the base. A heat insulating layer is arranged on the inner side of the base, and a coating is arranged on the heat insulating layer. The coating is at least one kind of oxide powder or a mixture of two or more kinds of oxide powder of aluminum oxide, lanthanum oxide, beryllium oxide, calcium oxide, zirconium oxide, uranium oxide, magnesium oxide, cerium oxide, thorium oxide, silicon dioxide and titanium dioxide. A high-radiation coating is smeared on the lower end of the heating body. The energy-saving type foot warmer is low in powder, environmentally-friendly, free of open fire, safe in use, easy to maintain, convenient to clean and waterproof and saves energy.

A short arc type discharge lamp wherein a cathode and an anode are arranged opposite to each other in an interior of a light emitting tube and said cathode comprises a main part made from tungsten and a tip end part made from thoriated tungsten, wherein thorium oxide particles having been peripherally coated with thorium are contained in the tip end part of said cathode.

The invention belongs to the technical field of metal material manufacturing, and particularly relates to a thorium tungsten wire used for winding a microwave oven magnetron and a manufacturing method of the thorium tungsten wire. The thorium tungsten wire is characterized by comprising 0.5-1.5% of thorium oxide, 0.0020-0.0080% of potassium and 97-98% of tungsten. Compared with the prior art, the thorium tungsten wire and the manufacturing method have the advantages that (1) according to the thorium tungsten wire, though 0.0020-0.0080% of the potassium is added, thorium oxide particles are still fine and uniform; (2) the thorium tungsten wire contains microelement potassium in content, after coils of the microwave oven magnetron wound through the thorium tungsten wire are carbonized at a high temperature, crystal grains cannot grow larger easily, organization stability is maintained, and the situation that the microwave oven magnetron cannot break due to shaking in the packaging and delivery transportation processes after being produced is guaranteed.

A discharge lamp includes a cathode and an anode which face each other in an arc tube, wherein the cathode is made of tungsten in which thorium oxide is doped. The cathode has a cylindrical body portion, a tip portion having a cone shape, and a middle portion formed between the body portion and the tip portion, wherein an angle θ1 of the tip portion is set to a range of 55 degrees≰θ1≰65 degrees, and an angle θ2 formed by side faces of the middle portion is smaller than that of the tip portion.

The invention belongs to the technical field of application of thorium-based nuclear fuel pellets and particularly relates to a preparation method of Nb2O5-doped thorium dioxide pellets. The preparation method includes pressing a blank through a pressing process, crushing the pressed blank, and screening the crushed blank to obtain particles with the particle size between 150 micrometers and 300 micrometers as finished particles; mixing Nb2O5 powder with ThO2 power uniformly; subjecting thorium dioxide pellets to cold-pressing molding, and using pelletized ThO2-0.25 wet% Nb2O5 powder for pellet molding, wherein an inner diameter of a female mould of a mould is of a cylindrical structure, the pellet molding powder is 1.58+/-0.20 g, pressure rise rate is 0.8-1.2 KN/s, molding dwelling time lasts for 10-15 seconds, green body density is controlled within 5.3-5.5 g/cm<3>; sintering the Nb2O5-doped thorium dioxide pellets in three holding stages including a low-temperature stage, a medium-temperature stage and a high-temperature stage. The preparation method is simple in process, easy in Nb2O5 powder addition, lower in ThO2 pellet preparation difficulty and ThO2 pellet production cost and beneficial to industrialized production.