47 results about "Scandium oxide" patented technology

The invention provides a method for recovering scandium from scandium-containing lithium slag and a pretreatment method of the scandium-containing lithium slag. The method for recovering scandium from the scandium-containing lithium slag comprises the following steps: mixing the scandium-containing lithium slag with concentrated sulfuric acid, and heating and roasting to obtain a roasted product; the roasted product is subjected to water leaching, and scandium-containing leaching liquid and leaching residues are obtained; the scandium-containing leachate is extracted, and a scandium-containing organic phase and raffinate are obtained; washing the scandium-containing organic phase to obtain a purified scandium-containing organic phase and a washing solution; carrying out reverse extraction on the purified scandium-containing organic phase, and filtering to obtain a reverse extract; the reverse extract is subjected to acid dissolution, and a scandium-containing acid solution is obtained; adding oxalic acid into the scandium-containing acid solution for precipitation, filtering to obtain scandium oxalate precipitation, and roasting to obtain scandium oxide.

The invention discloses a multi-band high-stability ferrite magnetic material composite formula and a preparation process, and relates to the technical field of magnetic materials. The ferrite magnetic material composite formula comprises 38-42 parts of ferric oxide powder, 37-41 parts of ferroferric oxide powder, 6-12 parts of graphene nanosheets, 5-7 parts of hydroxypropyl methyl cellulose, 6-9 parts of lanthanum oxide, 4-6 parts of scandium oxide, 1-3 parts of nano titanium dioxide, 4-6 parts of bismuth magnesium boron, 9-13 parts of ferric sulfate, 3-5 parts of manganese sulfate, 4-6 parts of zinc sulfate, 2-4 parts of copper sulfate and 2-3 parts of samarium sulfate. By utilizing a physical vapor deposition gradient doping process, the problems that an existing ferrite magnetic material is single in electromagnetic performance, cannot stably and efficiently work in a multi-frequency-band complex electromagnetic environment and cannot meet the requirements of the fields of communication, radar, electronic countermeasure and the like for wide-frequency-band and high-performance magnetic materials can be solved.

This application provides a method and system for extracting scandium from a scandium-containing cobalt-nickel hydroxide solution, belonging to the field of heavy metal recovery technology. The method includes the following steps: extracting the scandium-containing cobalt-nickel hydroxide solution with an organic extractant to obtain a scandium-containing organic phase; washing the scandium-containing organic phase to obtain a purified organic phase; back-extracting the purified organic phase with hydrochloric acid to obtain a scandium-containing back-extract and a back-extracted organic phase; performing scandium extraction treatment on the scandium-containing back-extract to obtain scandium oxide; and regenerating the back-extracted organic phase sequentially with sodium carbonate and dilute sulfuric acid to obtain a regenerated organic extractant, which is then reused. This application first sequentially washes the chlorine with sodium carbonate and sulfuric acid solutions, solving the emulsification problem in the extraction, washing, and back-extraction stages caused by washing with sodium carbonate solution. Furthermore, compared to directly using sulfuric acid solution for washing, this application uses less sulfuric acid in the regeneration stage, preventing phase miscibility during the washing process.

The invention belongs to the field of inorganic ceramic materials, particularly relates to a scandium oxide modified continuous aluminum oxide-zirconium oxide high-temperature-resistant composite ceramic fiber and a preparation method thereof, and particularly relates to a technology for regulating and controlling the microstructure of the composite fiber through the synergistic effect of rare earth oxide and a preparation process so as to improve the high thermal stability. The fiber composite ceramic fiber comprises the following components in percentage by mass: 0.1 to 3 percent of scandium oxide, preferably 0.5 to 2.5 percent, further preferably 0.8 to 1.2 percent, 8 to 9.5 percent of zirconium oxide, preferably 8.8 to 9.2 percent, and the balance of aluminum oxide, the grain size of the aluminum oxide is 150 to 200nm, the grain size of the zirconium oxide at the grain boundary is 40 to 80nm, and the grain size of the zirconium oxide at the intragranular position is 5 to 20nm. The obtained product is subjected to heat preservation service for 100 hours at the temperature of 1200 DEG C in the air atmosphere and then cooled to the room temperature, and the grain size of aluminum oxide in the product is only 0.21-0.33 micron. The composition is reasonable in design, the preparation process is simple and controllable, and the obtained product is extremely excellent in heat resistance and mechanical property and convenient for industrial application.

The invention discloses a titanium white waste acid treatment process, and relates to the technical field of industrial waste regeneration. The titanium white waste acid is subjected to microfiltration and membrane electrolysis treatment, sulfuric acid is separated and recycled under the control of constant pressure and constant current, and residual liquid is subjected to electrodialysis treatment to oxidize ferrous ions into ferric hydroxide precipitates and calcined into ferric oxide; carrying out reduction leaching on the titanium-containing material, hydrolyzing to generate metatitanic acid, and calcining to obtain titanium dioxide; oxidizing the hydrolysate to precipitate vanadate, and calcining to obtain vanadium pentoxide; adjusting the pH value of the filtrate, selectively adsorbing scandium through a biological adsorption column, precipitating and calcining the eluent to obtain scandium oxide, and regenerating and recycling the adsorbent through acid pickling. According to the process, through multi-stage treatment and biological adsorption, resource recycling of sulfuric acid, iron, titanium, vanadium and scandium components in the waste acid is achieved, the process is clean and efficient, secondary pollution of a traditional process is avoided, and a green low-carbon solution is provided for waste acid treatment in the titanium dioxide industry.

The invention belongs to the field of photocatalytic functional materials, and discloses a preparation method and application of a scandium monatomic anchored polytriazine imide photocatalytic material. In a high-temperature molten salt medium, scandium oxide and a melamine precursor are subjected to a synchronous reaction, so that scandium is anchored in a polytriazine imide carrier lattice in a monatomic form. Scandium is stably anchored on the surface of the polytriazine imide carrier in an atomic-scale dispersion form. The structure can synergistically increase active sites and effectively promote separation and migration of photo-induced electron-hole pairs, so that the activity of the material in photocatalytic synthesis of hydrogen peroxide is remarkably improved.

The application discloses a beneficiation-metallurgy combined method for comprehensively recovering niobium, silicon and scandium from niobium-containing tailings, and belongs to the technical field of mineral processing and metallurgical engineering. The application first adopts one roughing and two cleaning flotation to obtain a niobium rough concentrate, and then adopts hydrogen-based mineral phase conversion roasting to activate the niobium rough concentrate, and the roasting product is subjected to acid leaching, so that niobium and scandium enter into a leaching solution, and silicon is enriched in a leaching residue; the leaching solution is subjected to solvent extraction, precipitation and calcination to obtain a niobium oxide product; the leaching residue is subjected to alkali leaching and pH adjustment to obtain white carbon black; and the raffinate is subjected to selective extraction to obtain a scandium oxide concentrate. The preparation method has the advantages of low-temperature hydrogen-based roasting, low carbon and low energy consumption, and can realize the step-by-step recovery of three valuable products, realizes the high-value utilization of all components of the niobium tailings, and has the advantages of mild process conditions, a niobium recovery rate of greater than or equal to 70% in the whole process, a scandium recovery rate of greater than or equal to 60% in the whole process, a white carbon black SiO2 content of greater than or equal to 95%, and good industrial application prospect.

The present invention provides a semiconductor structure comprising: a silicon substrate in [100] orientation; a scandium oxide layer over the substrate, in [111] orientation; and a scandium-rare earth-oxide layer over the scandium oxide layer. The scandium-rare earth-oxide layer can have a graded composition to transition lattice constant to match to a subsequent layer, such as an indium nitride layer having very high electron drift velocity. InN over Si (100) offers transistors, photonics and passive electronics that operate in the terahertz frequency range.

This application provides a method for deep removal of calcium impurities from scandium oxide, belonging to the field of rare earth metal oxide purification. The method includes: dissolving scandium oxide raw material containing calcium impurities to obtain a calcium-containing scandium solution; adding a pH adjuster to the calcium-containing scandium solution to obtain a first scandium solution; reacting the first scandium solution with phosphoric acid and / or phosphate to obtain a second scandium solution and solid calcium phosphate; reacting the second scandium solution with a complexing agent to obtain a third scandium solution; reacting the third scandium solution with oxalic acid and / or sodium oxalate to obtain scandium oxalate crystals and a calcium complex solution; adding a strong acid solution to the calcium complex solution; and calcining the scandium oxalate crystals to obtain scandium oxide. Through calcium phosphate precipitation-complexation-crystallization, not only can calcium impurities be deeply removed from scandium oxide products, but impurities such as iron, titanium, and zirconium can also be removed, resulting in scandium oxide products with a purity of over 99.99%.

The application belongs to the technical field of scandium separation and purification, and particularly relates to a method for separating and purifying scandium from crude nickel-cobalt hydroxide, which comprises the following steps: using 0.1-0.5 mol / L dilute sulfuric acid to leach the crude nickel-cobalt hydroxide, and filtering to obtain a scandium-containing leaching solution, wherein the ratio of the dilute sulfuric acid to the crude nickel-cobalt hydroxide is (3-5) mL:1 g, and the molar ratio of sulfuric acid to scandium is (3-5):1; using an extractant comprising Cyanex572 and Aliquat336 to treat the scandium-containing leaching solution to obtain a scandium-containing organic phase; using an oxalic acid solution to back-extract the scandium-containing organic phase to obtain scandium oxalate precipitation; and calcining the scandium oxalate precipitation to obtain scandium oxide. The technical scheme adopts a selective leaching process to realize efficient separation of scandium from main metals nickel and cobalt at the front end, has low reagent consumption, a short process, and great cost advantages; a new type of synergistic extraction technology is adopted, which has super-high selectivity and extraction capacity for scandium, the prepared scandium oxide has a purity of greater than or equal to 96%, and the scandium recovery rate is greater than or equal to 89%.

This invention discloses a multi-cavity thin-walled battery tray-type aluminum alloy profile for new energy vehicles and its preparation method, relating to the field of battery tray technology. The internal chemical composition of the aluminum alloy profile, by mass percentage, includes: Si: 0.65%–0.75%, Mg: 0.70%–0.85%, Cu: 0.10%–0.20%, Mn: 0.10%–0.18%, Cr: 0.06%–0.12%, Ti: 0.05%–0.10%, Sc: 0.02%–0.08%, Zr: 0.05%–0.12%, Fe≤0.20%, B≦0.10%, with the balance being Al. This invention successfully constructs a nanoscale dispersed reinforcing phase in the matrix through stepwise pretreatment of Sc / Ti elements and a two-stage aging process. Combined with an upward dual-medium quenching technology, the high-temperature zone utilizes a scandium oxide-containing water-based medium for rapid cooling, effectively freezing the supersaturated solid solution. The low-temperature zone utilizes an oil-based medium for slow cooling, eliminating harmful residual stress and significantly improving the load-bearing capacity and collision energy absorption safety of the battery tray.

The application provides a titanium dioxide type low-temperature hydrogenolysis catalyst and a preparation method and application thereof. The catalyst comprises a titanium dioxide carrier and an active component loaded on the titanium dioxide carrier, and the active component comprises scandium oxide and tungsten oxide. The preparation method of the catalyst comprises the following steps: dipping the titanium dioxide carrier in a mixed solution of scandium salt and tungsten salt for a period of time, so that the scandium salt and the tungsten salt are loaded on the titanium dioxide carrier; and then drying and calcining the titanium dioxide carrier loaded with the scandium salt and the tungsten salt, to obtain the titanium dioxide type low-temperature hydrogenolysis catalyst. The catalyst has good sulfur dioxide hydrogenation activity and organic sulfur hydrolysis activity, and can be applied to a process for treating sulfur recovery tail gas at a low temperature of 210-220 DEG C.

The invention relates to the technical field of metal materials, and discloses an aluminum alloy cooperatively added with scandium and scandium oxide and a preparation method of the aluminum alloy. The method comprises a casting method of an Al-4. 5Cu-0. 3Mg aluminum alloy, and Sc and Sc2O3 are added into an Al-4. 5Cu-0. 3Mg aluminum alloy matrix; comprising the following steps that under high-purity argon protection and high vacuum, an aluminum alloy matrix is mixed with Sc and Sc2O3, and homogenization treatment is conducted after smelting; carrying out primary and secondary aging treatment on the alloy subjected to solid solution treatment; and low-temperature aging treatment and short-time high-temperature aging precipitation are conducted, and the alloy is prepared. By synergistically adding scandium and scandium oxide, the high-temperature performance and stability of the cast aluminum alloy are remarkably improved, and compared with single addition, grains are refined, and the structure is optimized; the tensile strength, yield strength and plasticity of the alloy are good after thermal exposure, an Al3Sc precipitated phase is formed, scandium distribution is more uniform, and the high-temperature performance and stability of the alloy are improved.

A power storage device 1 comprises: a first electrode 10 that functions as a p-type semiconductor; a second electrode 20 that functions as an n-type semiconductor; and an oxygen vacancy region 30 that is disposed between the first electrode 10 and the second electrode 20. The first electrode 10 preferably contains manganese oxide. In addition, the second electrode 20 preferably contains tin oxide. The oxygen vacancy region 30 also preferably contains zirconium oxide stabilized by yttrium oxide, cerium oxide, calcium oxide, magnesium oxide, or scandium oxide.

The utility model discloses a glass cover plate, a display module and electronic equipment, and the glass cover plate comprises a base material layer; the titanium diboride layer is arranged on the upper surface of the base material layer; and the scandium oxide layer is arranged on one side, back to the base material layer, of the titanium diboride layer. The mechanical property and the wear resistance of the product are improved, and the optical property is also considered.

The invention discloses high-light-yield boron gadolinium silicate scintillation glass with a wide aluminum content range and a preparation method and application of the high-light-yield boron gadolinium silicate scintillation glass. The scintillation glass comprises a matrix and light-emitting central ions dispersed in the matrix, the boron-gadolinium silicate scintillation glass with the wide aluminum content range and the high light yield comprises a matrix and light-emitting central ions dispersed in the matrix, wherein the matrix comprises the following components in percentage by mass: 3-15% of silicon dioxide, 5-15% of silicon dioxide, 5-15% of silicon dioxide, and the balance of water. 4 to 11% of diboron trioxide; 50 to 70% of gadolinium oxide; 6-20% of gadolinium fluoride; 4-20% of aluminum oxide; 1-3% of gallium oxide; 2-5 parts of barium oxide; 0.5 to 1.5 percent of calcium oxide; the content of the luminescent central ions is 2-9%, and the sum of the proportions of the components is 100%. The gadolinium borosilicate scintillation glass is characterized in that gadolinium trioxide, silicon dioxide and diboron trioxide are used as main components, a large amount of aluminum oxide is added, so that the gadolinium borosilicate scintillation glass has high density, high light yield and high transmittance, and the preparation cost of the high-performance scintillation glass is remarkably reduced.

The invention provides a dielectric layer material for an electrostatic chuck and a preparation method of the dielectric layer material, and relates to the technical field of electrostatic chucks. The dielectric layer material for the electrostatic chuck comprises silicon dioxide, calcium oxide, zinc oxide, zirconium oxide, aluminum oxide, boric oxide, barium oxide, titanium oxide and functional filler, wherein the functional filler is a rare earth oxide core and glass phase shell material; the rare earth oxide in the rare earth oxide core-at-glass phase shell material is one or more of scandium oxide, yttrium oxide or lanthanum oxide. The dielectric layer material for the electrostatic chuck has the characteristics of plasma erosion resistance and low sintering temperature at the same time.

The present application belongs to the field of hydrometallurgy, and discloses a sandstone type scandium ore in-situ leaching mining process method, wherein a scandium leaching reagent is injected into a sandstone type scandium ore layer through a liquid injection well, a scandium-containing leaching reagent is pumped out through a liquid pumping well, the scandium-containing solution is subjected to a filtering process, then the scandium-containing solution is subjected to a column adsorption process by taking a functional ion exchange resin as an adsorbent; then the obtained scandium-loaded saturated resin is subjected to elution by a desorption agent, the desorption volume is 1-5 BV, the elution liquid after passing through the column is collected, then oxalic acid is added, and scandium oxide products are obtained through precipitation and calcination. The process method has the advantages of simple operation, green environmental protection, and easy large-scale production, the product purity is as high as 99.9%, and the process method has good industrial application value.

The invention belongs to the technical field of scandium separation and purification, and particularly relates to a method for separating and purifying scandium from crude nickel cobalt hydroxide, which comprises the following steps: using 0.1-0.5 mol / L dilute sulphuric acid to leach crude nickel cobalt hydroxide, filtering to obtain scandium-containing leachate, the ratio of dilute sulphuric acid to crude nickel cobalt hydroxide is (3-5) mL: 1g, and the molar ratio of sulphuric acid to scandium is (3-5): 1; carrying out scandium extraction treatment on the scandium-containing leachate by using an extraction agent comprising Cyanex572 and Aliquat 336 to obtain a scandium-containing organic phase; carrying out reverse extraction on the scandium-containing organic phase by using an oxalic acid solution to obtain scandium oxalate precipitate; and calcining the scandium oxalate precipitate to obtain scandium oxide. According to the technical scheme, the selective leaching process is adopted, efficient separation of scandium and main metal nickel and cobalt is achieved at the front end, reagent consumption is low, the process is short, and the large cost advantage is achieved; a novel synergistic extraction technology is adopted, ultrahigh selectivity and extraction capacity on scandium are achieved, the purity of prepared scandium oxide is larger than or equal to 96%, and the recovery rate of scandium is larger than or equal to 89%.

The application discloses high-purity anhydrous scandium fluoride and a preparation method thereof, and belongs to the field of rare earth fluoride preparation. The preparation method comprises the following steps: mixing scandium oxide and zinc fluoride by a mechanical activation treatment method to obtain mixed raw materials, using mechanical activation to induce crystal lattice defects, significantly improving the kinetic conditions of the solid-solid reaction process of scandium oxide and zinc fluoride, and making fluorination more sufficient; roasting the mixed raw materials under an inert atmosphere to obtain roasted materials; putting the roasted materials into a mixed leaching system containing ammonia and ammonium salt for selective leaching, and then filtering and separating to obtain a solid crude product; using an ammonia-ammonium salt complex system, using the high stability of Zn(NH3)4] 2+ complex ions to realize accurate separation of by-products Zn and main products ScF3; and washing and drying the solid crude product to obtain anhydrous scandium fluoride, with a content of 400 ppm or less and a fluorination rate of 99.99%.

The invention discloses a method for separating and purifying high-purity scandium oxide from an MHP raw material, and belongs to the technical field of rare metal extraction. The method comprises the following steps: oxidizing the MHP sulfuric acid leaching solution to remove iron and aluminum, and synchronously obtaining a scandium-containing purified solution and scandium-rich iron and aluminum slag; respectively carrying out directional recovery-purification liquid direct extraction on the two strands of materials, carrying out acid washing on the iron and aluminum slag to dissolve out scandium, and then extracting; a novel chelating extraction agent DY-SS-01 (containing-CONR2 and-COOH functional groups) is adopted for multi-stage extraction-washing-reverse extraction, and efficient separation of scandium from main metals such as Ni, Co and Mn is achieved; and precipitating the strip liquor through oxalic acid, and calcining to obtain high-purity scandium oxide with the Sc2O3 purity of more than or equal to 95%. Through the strategy of double-flow-path collaborative recovery and scandium pre-separation, interference of scandium on the subsequent P204 impurity removal process is eliminated, the quality of the nickel sulfate product is guaranteed, the organic phase can be recycled, and the process is green, economical and easy to industrialize.

The present application relates to the field of hydrometallurgy, and discloses an extractant and a method for separating and extracting scandium and radioactive elements. An acidic aqueous phase containing scandium and radioactive elements is mixed with an organic phase containing an extractant, and extraction separation is performed to obtain an aqueous phase containing scandium and an organic phase containing radioactive elements; the extractant is any one of the structures shown below; the present application uses a nitrogen-containing heterocyclic extractant, and through solvent extraction, most of the radioactive elements, such as uranium and thorium, can be removed, a high radioactive removal rate is easy to obtain a high-purity scandium oxide product, the loss of scandium is low, the obtained scandium oxide product has a very high added value, the economic benefits of production are improved, the production safety problems caused by possible radioactive accumulation in the production process are reduced, and the production safety is ensured.

The invention provides a method for preparing high-purity scandium oxide, which comprises the following steps: S1, dissolving coarse scandium oxide in an acid solution to obtain a scandium-containing solution; s2, adsorbing the scandium-containing solution in the step S1 by using cationic resin, and analyzing the adsorbed cationic resin to obtain a purified scandium-containing solution; wherein the cationic resin has a sulfur group and / or a carboxylic acid group; s3, mixing a surfactant solution, an oxalic acid solution and the purified scandium-containing solution in the step S2, carrying out reaction treatment, and carrying out solid-liquid separation to obtain a scandium oxalate solid phase; and S4, sequentially washing, drying and roasting the scandium oxalate solid phase in the step S3 to obtain the high-purity scandium oxide. According to the method, the high-purity scandium oxide can be prepared through a simple process, the absolute purity of the scandium oxide is high, and the impurity content can be reduced to 5 ppm or below.

The application discloses a magnetic regulation catalyst, a preparation method thereof and application of the catalyst in ammonia-hydrogen energy catalytic conversion, and belongs to the technical field of ammonia synthesis and decomposition, and comprises a magnetic component and an electron spin regulation component; the magnetic component is a main magnetic component and / or a secondary magnetic component; the main magnetic component is one or two or more combinations of oxides of iron; the secondary magnetic component is one or two or more combinations of oxides of nickel and oxides of cobalt; and the electron spin regulation component is one or two or more combinations of scandium oxide, yttrium oxide and lanthanide oxides. The electron spin regulation component, as an electron transfer intermediate, is added to the magnetic regulation catalyst to regulate the electron spin state and magnetic moment of the main magnetic component and the secondary magnetic component, so that the catalyst has stronger N2 activation performance under the rapid adjustment of an electromagnetic field, and then the activation energy of N2 is significantly reduced, thereby improving the ammonia synthesis efficiency at low temperature and low pressure.

The invention provides a method for recovering scandium from scandium-containing slag and preparing scandium oxide, which comprises the steps of acid leaching, filtering, pH regulation, extraction, washing, reverse extraction, washing, roasting, organic purification and the like, can effectively recover scandium from industrial byproducts or industrial wastes and prepare scandium oxide, effectively realizes resource recovery and cyclic utilization, and is suitable for industrial production. Through repeated acid leaching treatment on the filtered filter residues and the raffinate, multi-stage treatment can be carried out, scandium loss can be reduced, and the washed liquid for eluting impurities can be returned to the acid leaching process again, so that acid recycling is realized, the sewage discharge amount is reduced, and the problems of high investment, high loss rate, high preparation cost and the like can be effectively solved.

The invention discloses a method for recovering scandium oxide in nickel-cobalt hydroxide through cooperation of acid leaching and organic amine extraction. The method comprises the following steps: carrying out acid leaching on nickel-cobalt hydroxide containing scandium, and enriching scandium to obtain a scandium-rich solution; adding an organic phase of which the N1923 extraction agent concentration is greater than or equal to 20 vol% into the scandium-rich solution to extract scandium, and separating to obtain a scandium-loaded organic phase and raffinate; carrying out acid reverse extraction on the scandium-loaded organic phase to obtain a scandium-containing solution; extracting and separating metal impurities from the scandium-containing solution by adopting an organic phase of which the TOA extraction agent concentration is greater than or equal to 30vol% to obtain purified scandium-containing raffinate; oxalic acid is added into the purified scandium-containing raffinate for scandium precipitation, and obtained solid precipitates are roasted to obtain scandium oxide of the grade 4N or above. According to the method for recycling scandium oxide in nickel-cobalt hydroxide through acid leaching and organic amine extraction, the problem of organic phase decomposition and degradation caused by alkali reverse extraction and an acidic phosphorus extraction agent is solved, directional enrichment of the scandium element is completed under the normal-temperature condition, the problem of organic phase decomposition and degradation caused by the high-temperature working condition is solved, and the method is suitable for large-scale industrial production. And a high-purity scandium oxide product can be obtained.

The invention provides a crucible for calcining high-purity zirconia powder and a preparation method of the crucible, and belongs to the technical field of crucibles. The preparation method comprises the following steps: mixing fused quartz, alumina-based sintered mullite, alumina micro-powder, micron-sized zirconium dioxide micro-powder, nano-sized zirconium dioxide micro-powder, polycrystalline mullite short fibers, a plasticizer, a binding agent, nano organic resin microspheres, acrylic fibers, carbon fibers, lanthanum phosphate, a stabilizer, lanthanum oxide and scandium oxide, pressing, and sintering to obtain a finished product. Natural gas chemical vapor deposition carbon densification, siliconizing and zirconium permeation are carried out, then graphitization is carried out, the crucible for high-purity zirconia powder calcination is prepared, and the crucible has the advantages of being high in purity, good in thermal shock resistance and smooth in surface and has wide application prospects.

The application belongs to the technical field of refractory materials, and particularly relates to a water-vapor-resistant refractory material for a glass melting furnace and a preparation method. The method uses modified electrofusion magnesium-aluminum spinel, modified nano-titanium dioxide, aluminum titanate, scandium oxide stabilized zirconia, nano-silicon carbide, nano-aluminum oxide, zirconite micro powder and polyvinyl alcohol solution as raw materials to prepare the water-vapor-resistant refractory material for the glass melting furnace. The material has high thermal shock resistance, high corrosion resistance and low thermal conductivity, and can effectively improve the use efficiency of the glass furnace.

The invention discloses a method for cleanly preparing high-purity scandium oxide from crude scandium oxalate, which comprises the following steps of: firstly, realizing efficient separation of scandium and most coexisting metal impurities through conversion reaction of the crude scandium oxalate and ammonium bicarbonate; then, an acidic phosphorus-containing extraction agent is adopted to selectively extract scandium in the returned solution, and thorium and rare earth impurities are deeply removed; then, solid oxalic acid is adopted for stripping scandium from the organic phase, and efficient conversion of scandium oxalate and in-situ regeneration of the organic phase are achieved while a traditional water phase is eliminated; and finally, removing an organic phase entrained in scandium oxalate through a secondary carbonate conversion step to obtain refined scandium salt, and roasting to obtain high-purity scandium oxide. The operation of all the units is linked with one another, an efficient, clean and low-consumption closed cycle is formed, and the method is used for purifying low-grade scandium oxalate raw materials with complex components.