6 results about "Microcrystalline" patented technology

The composition of nano-grade lanthanum titanium compound oxide is La2-4Ti2-9O7-24, in which La:Ti:O (atom ratio)=2-4:2-9:7-24, LawTi2O7 and La4Ti9O24 are existed in micro-crystal state, its average grain size is 28nm-35nm, and its specific surface area is greater than 60 sq.m/g. Said compound oxide can be used as catalyst for preparing lactide by utilizing lactic acid dehydration and polycondensation, can improve viscosity of reaction system and can effectively reduce lactic acid oligomer cracking temp., and the yield of lactide is 80%-90%.

The invention relates to the modification of cast stone. The cast stone is modified and prepared into a wear-resistant composite microcrystalline sheet material by the addition of some raw materials. The wear-resistant composite microcrystalline sheet material is concretely prepared by the following steps of: uniformly mixing natural basalt, quartz sand, feldspar, changbaiite, boron nitride and molybdenum disulfide according to a certain weight ratio, heating the mixture into a crystallization tank furnace for crystallization, fully melting, followed by water quenching to prepare crystallized pellet diet; placing the pellet diet into a thermal furnace for heating, softening, melting, laying flat to obtain a smooth and flattening sheet material, preparing into a polycrystalline sintered body with a hard microscopic structure, cooling by annealing, grinding, polishing, and cutting into the required specification. The invention relates to a high-strength, high wear-resistant and corrosion-resistant protective material. Due to the adoption of natural inorganic materials, the novel green environmental-protection wear-resistant composite microcrystalline sheet material, which is prepared by two-time high-temperature sintering, is characterized in that its wear resistance can be more than ten times than that of common carbon steel, the microcrystalline sheet material has strong wear-resistant performance; and its use cost is low.

The invention related to a preparation method of a silicon carbide microcrystalline homogenized in dimension and shaped in a polyhedron form. The preparation method comprises the following steps of: putting the SiC raw material in a crucible, fastening a microcrystalline depositing collector at the inner side of a crucible cover, screwing the crucible and then putting the crucible in a crystal growth furnace; vacuumizing the crystal growth system until the vacuum degree is less than 5*10<-3>Pa, and then filling an atmosphere gas of 1-20000Pa; increasing the temperature of the crystal growth system so that the temperature of the raw material zone is in the range from 1800 to 2200 DEG C, keeping the temperature of the microcrystalline depositing collector at the crucible cover in the range from 1750 to 2100 DEG C, and starting microcrystalline growing; and after the microcrystalline grows for 0.5-2 hours, turning off the power of the crystal growth furnace. The preparation method provided by the invention is not involved with any other precursor and catalyst; besides, the raw material zone is separated from the deposition growth zone; the obtained SiC microcrystalline dimension is adjustable in the range from 10 to 50 microns; the microcrystalline obtained is separated from each other and shaped in the polyhedron form; the microcrystalline growth period is short, and the microcrystalline growth method is simple and easy to popularize; therefore, the preparation method of the silicon carbide microcrystalline homogenized in dimension and shaped in the polyhedron form is suitable for large-scale industrial production and has high practicable value.

The invention relates to the technical field of far-infrared heater assembly, in particular to a rubberizing mechanism and a rubberizing device for assembling and producing microcrystalline far-infrared heater. The rubberizing mechanism comprises a rubberizing bracket, and an adhesive tape roller, a tensioning wheel, an adhesive tape pressing component, an adhesive tape cutting component and an auxiliary pressing component which are mounted on the rubberizing bracket, the adhesive tape roller is rotationally mounted on the side surface of the rubberizing bracket; the tensioning wheel, the adhesive tape pressing component, the adhesive tape cutting component and the auxiliary pressing component are sequentially arranged on one side of the adhesive tape roller. The adhesive tape is pressed by the pressing wheel to be smooth.

The invention provides a current transformer for a CGIS, and the current transformer comprises an air chamber, which is internally provided with an iron core, the outer layer of the iron core is woundwith a low-voltage secondary coil, and the outer layer of the low-voltage secondary coil is covered with a shielding layer; the measurement stage adopts a novel process combining a silicon steel sheet and a microcrystalline iron core, and the measurement precision requirement is ensured at 1% of test points and 120% of test points; the high-voltage electrical part is arranged in the gas chamber and surrounded by insulating gas; and a sealing groove is designed at a mounting position and adopts a sealing structure, so that the high-voltage part of the product is sealed and insulated in the gaschamber, and a secondary wiring terminal is arranged outside the air chamber to facilitate wiring operation.