16 results about "Lithium metaborate" patented technology

The invention discloses a method for rapidly and accurately determining multiple elements of limestone powder based on a fuse piece method, and belongs to the technical field of material detection. A fuse piece scheme is designed aiming at the characteristics of fine particles, easy moisture absorption and the like of limestone powder instead of improving a general scheme of materials such as limestone, dolomite and the like, key parameters are optimized, the flux ratio is set as follows: the ratio of lithium tetraborate to lithium metaborate is 67: 33, melting is divided into three processes of preheating, pre-oxidation and melting, the melting temperature is effectively controlled to be 1060 DEG C, the time is 60 seconds, and the melting efficiency is greatly improved. The problem that limestone powder is prone to excessive melting or uneven melting is solved, the matrix effect and the particle size effect are greatly reduced, it is verified that three limestone powder standard samples with known components are selected for testing, the relative error between the result and the standard value is smaller than 1%, data meet the strict allowance requirement of the industry, and compared with an existing fuse piece method, the method has the advantage that the cost is low. The detection adaptability to the limestone powder is remarkably improved, and the component detection requirements of mainstream limestone powder in the industry can be met.

The invention discloses a method for detecting silicon dioxide, calcium oxide and magnesium oxide in fly ash, which comprises the following steps: firing the fly ash at a certain temperature for a certain time, weighing a certain amount of fired sample, preparing a glass sheet by using lithium tetraborate-lithium metaborate as a flux and ammonium iodide as a release agent in a melting furnace at a certain temperature for a certain time, and then sintering the glass sheet in a sintering furnace at a certain temperature for a certain time. The X-ray fluorescence intensity of silicon, calcium and magnesium is determined through an X-ray fluorescence spectrometer, so that the determination of silicon dioxide, calcium oxide and magnesium oxide is completed. The method is simple to operate, high in analysis speed, accurate in result and easy to master.

The invention discloses a method for detecting the content of each element in slag. The method comprises the following steps: 1) pre-melting a sample; 2) manufacturing a glass sheet; (3) carrying out spectrum detection on the glass sheet prepared in the step (2) by utilizing a fluorescence spectrophotometer; wherein in the step 1), a mixed flux of lithium tetraborate and lithium metaborate and sodium nitrate are used for pre-melting treatment of a sample, and a sample melt is obtained; in the step (2), a mixed flux of lithium tetraborate and lithium metaborate is used for conducting melting treatment on the sample melt again, and the glass sheet is obtained.By means of the method, determination of CaO, SiO2, MgO, Al2O3, MnO, TiO2 and P2O5 in the furnace slag can be completed at the same time.

The invention belongs to the technical field of analysis and detection, and relates to a method for detecting the content of CaO, SiO2 and total Al in a slag pressing agent containing elemental aluminum. Comprising the following steps: S1, crushing a sample, uniformly mixing the sample, raising the temperature of a high-temperature furnace to 850 DEG C, and setting X fluorescence parameters; s2, pre-oxidizing the sample: putting a to-be-detected slag pressing agent sample containing elemental aluminum into a platinum gold crucible with a wall hung by using a mixed flux of lithium tetraborate and lithium metaborate; weighing lithium carbonate; uniformly mixing, and pre-oxidizing in a high-temperature furnace at 850 DEG C; s3, sample melting: taking out the pre-oxidized sheet and placing the pre-oxidized sheet in a 1050 DEG C sample melting furnace; melting is conducted for 15 min; performing mold reversing and sheet forming; s4, X fluorescence detection: putting the fuse piece sample into a spectrograph for detection, and giving a sample result; s5, sample detection is finished, whether a detection result between the parallel samples exceeds an allowable error range or not is judged, and an average result is calculated. The method solves the problem that X-fluorescence spectrum fuse piece analysis cannot be realized at present.

The invention relates to the field of glass production, in particular to an ICP (inductively coupled plasma)-based carbonate main component and trace element synchronous detection method, which comprises the following steps: S1, sample pretreatment: grinding a sample, and melting and digesting with a lithium tetraborate-lithium metaborate mixed solvent to obtain mother liquor; s2, gradient dilution, wherein the concentration of microelements in the mother liquor is kept at 0.01-1 ppm; 1 ml of mother liquor is taken and diluted by 100-200 times, and sub-liquor is obtained; preparing at least five groups of concentration gradient test curve ranges by using a full-element standard solution; s3, ICP (Inductively Coupled Plasma) detection: detecting main components, adding a Y internal standard solution into a sub-solution, correcting the solution concentration and atomization efficiency fluctuation, selecting a vertical test, and detecting the concentrations of Ca and Mg; and trace element detection: selecting a horizontal test during the test, and detecting the concentrations of Li, Zr and Nb. According to the method, the problem of detection deviation caused by carbonate and silicate residues is avoided, the Y internal standard is added during detection to correct instrument fluctuation, the matrix interference problem of traditional ICP detection is solved, the detection efficiency and precision are improved, the cost is reduced, and the application range is wide.

The invention discloses a low-dielectric-loss chip packaging glass substrate and a preparation method thereof, and relates to the technical field of glass manufacturing. The chip packaging glass substrate is prepared from the following raw materials: silicon dioxide, boric oxide, zirconium dioxide, germanium dioxide, aluminum oxide, gadolinium oxide, a composite fluxing component and a low-loss dielectric functional component, the composite fluxing component is prepared from the following raw materials: magnesium fluoride, lithium metaborate and strontium fluoride; the low-loss dielectric functional component is prepared from the following raw materials: silicon nitride, boron nitride micro powder and a coupling agent solution. The preparation method of the chip packaging glass substrate comprises the following steps: preparing the composite fluxing component, preparing the low-loss dielectric functional component, forming the glass substrate, and preparing the chip packaging glass substrate. The prepared chip packaging glass substrate is low in dielectric loss and excellent in mechanical property.

The invention relates to a preparation method of a high-purity lithium tetrafluoroborate liquid salt, which comprises the following steps of: reacting lithium metaborate serving as a raw material with calcium fluoride and excessive sulfur trioxide gas for 1-5 hours at the temperature of 60-150 DEG C and the high pressure of 0.2-5 MPa, after the reaction is finished, depressurizing to separate out the sulfur trioxide gas for reuse, dissolving a reaction product in a benign organic solvent under the protection of inert gas, filtering out insoluble substances, and performing vacuum drying to obtain the high-purity lithium tetrafluoroborate liquid salt. And performing resin deacidification and membrane filtration on the filtrate to obtain the product. The method is simple in process, mild in condition and high in product yield, the water content of the prepared high-purity lithium tetrafluoroborate liquid salt is lower than 10 ppm, the free acid content (in terms of HF) is lower than 13 ppm, the Cl content is lower than 3 ppm, the SO4 content is lower than 2-5 ppm, and the single content of various metal impurity ions (such as calcium, iron, magnesium, sodium and potassium) is smaller than or equal to 2 ppm.

The invention discloses a red mud-based pneumatic silencer and a preparation method thereof, the method takes red mud, waste aluminum oxide ceramic substrate powder, waste glass powder and other industrial solid wastes as raw materials, and the high-performance pneumatic silencer is prepared through the processes of mixing, burdening, grinding and powdering, melting, atomizing and balling and sinter molding. The preparation method comprises the following specific steps: mixing 20-50 parts of red mud, 10-30 parts of waste aluminum oxide ceramic substrate powder, 1-7 parts of lithium tetraborate, 1-3 parts of lithium metaborate, 5-15 parts of waste glass powder, 5-15 parts of quartz sand and 10-20 parts of kaolin, and grinding until the 325-micron screen residue is less than 1%; melting at the temperature of between 1,300 and 1,700 DEG C; carrying out atomization under the pressure of 0.5-2.0 MPa, and preparing 18-88 [mu] m glass spheres at the cooling rate of 100-500 DEG C / s; and sintering at the temperature of 1000-1200 DEG C for 1-3 hours. The prepared silencer has a communicated pore structure, the silencing capacity reaches 21-30dB (A), the silencer is not damaged under the radial load of 260-350N, and meanwhile, the silencer has excellent acid and alkali corrosion resistance and high-temperature stability. High-value utilization of industrial solid waste is achieved, and the problems that a traditional metal silencer is prone to corrosion and short in service life are solved.

The invention discloses a preparation method of lithium difluoro (oxalato) borate, which comprises the following step: reacting anhydrous lithium metaborate with oxalyl fluoride in an organic solvent to generate the lithium difluoro (oxalato) borate. The method is simple in process, high in product conversion rate, free of three wastes and environmentally friendly, and the prepared product is high in purity, few in impurities and suitable for the field of lithium ion batteries.

The invention discloses a method for analyzing a refractory material by a rapid glass melting method-inductively coupled plasma atomic emission spectrometry, which comprises the following steps of: preparing a lithium tetraborate-lithium metaborate protective film in a platinum yellow crucible, preparing a standard quality control sample into a molten glass sheet, and dissolving into a to-be-tested solution; determining the content of components in the quality control sample by inductively coupled plasma atomic emission spectrometry, and drawing a working curve; and then measuring the component content in the refractory material sample to be measured, and measuring data by using the same processes of manufacturing the melt sheet, dissolving the melt sheet, filtering the sample to be measured and using the inductively coupled plasma atomic emission spectrometry. According to the method, the rapid analysis of SiO2, Al2O3, CaO, Fe2O3, TiO2, K2O, MnO, MgO, P2O5, Na2O, Cr2O3 and ZrO2 in the refractory material can be completed at the same time, and the detection time is shortened.

A mold flux for the continuous casting of large-strand ultra-high carbon wear-resistant ball steel and a preparation method therefor. ‌The mold flux is prepared from the following raw materials in parts by weight: 15-28 parts of wollastonite powder, 20-40 parts of an electrically fused pre-melted slag, 3-6 parts of lithium metaborate, 2-8 parts of borosilicate glass, 2-4 parts of sodium fluoride, 5-13 parts of sodium carbonate, 2-7 parts of barium fluoride, 7-11 parts of fluorite powder, 2-5 parts of electrode graphite, 2-5 parts of high-carbon amorphous graphite, 2-4 parts of N660 carbon black and 2-4 parts of dextrin. The mold flux has a relatively low viscosity, a relatively low melting point and a relatively high basicity, improves the lubrication effect on a casting blank, enhances the ability to absorb floating inclusions in the molten steel, reduces the incidence of cracks on the casting blank surface and the occurrence of breakouts, improves the surface and subsurface quality of the casting blank, and increases the production efficiency of continuous casting. The mold flux is particularly suitable for the continuous casting production of large-strand ultra-high carbon wear-resistant ball steel.

The invention relates to the technical field of power batteries, and discloses a coating modification method of single-crystal lithium manganate, which comprises the following steps: putting single-crystal Mn3O4 with the average particle size of 6-8 mu m into an atmosphere furnace, introducing argon-hydrogen mixed gas containing 5vol% of hydrogen, heating to 580 DEG C at the speed of 5 DEG C / min, preserving heat for 8 hours, and then cooling to 300 DEG C in nitrogen-oxygen mixed gas containing 2vol% of oxygen to form a nanoscale activation layer on the surface. Monocrystal Mn3O4 is pretreated at a low temperature in a hydrogen-containing atmosphere, the surface activity is improved while the crystal form integrity is maintained, the problem that a process window is narrow due to low reaction activity of single-crystal manganous-manganic oxide is solved, gradient distribution of elements from a crystal boundary to the inside of crystal grains is achieved, an inorganic ion conductor outer layer is constructed on a conductive polymer bottom layer, and the surface activity of the single-crystal Mn3O4 is improved. And a double-function protection interface is formed, lithium metaborate is selectively deposited on a grain boundary by utilizing high permeability of supercritical CO2 fluid, a grain boundary structure is strengthened, and nanoscale precise modification is realized.

The application discloses a method for directly preparing lithium tetraborate and lithium metaborate mixed flux by a liquid phase method. The method uses 99.9% lithium carbonate and 99.9% boric acid which are easy to obtain and have moderate prices to react in a liquid phase. By controlling the concentration of lithium carbonate in the feeding, the supersaturation dissolution characteristics of lithium tetraborate solution are broken, and lithium tetraborate and lithium metaborate mixed flux are directly precipitated in an aqueous solution. By controlling the reaction temperature and cooperating with the introduction of a certain mass of carbon dioxide into the reaction system, the generation of by-products is inhibited, and various forms of borate in the solution tend to generate the required mixed flux. The mixed flux required by the method is generated in a liquid phase by a chemical method, and the method has the advantages of low energy consumption, low cost, simple process, easy operation and convenience for large-scale production.

The invention relates to a preparation method of a polypyrrole / lithium metaborate composite flexible layer / rigid layer co-coated nano silicon negative electrode material, and belongs to the technical field of lithium ion batteries. The material comprises nano silicon particles, and a lithium metaborate layer and a polypyrrole layer which are sequentially coated on the surfaces of the nano silicon particles, the material is prepared by combining a solution evaporation drying method and a liquid phase chemical oxidation polymerization method, the diffusion path of lithium ions can be shortened by selecting the nano silicon particles, and the lithium is more uniformly intercalated and deintercalated, so that the stress concentration is reduced, and LBO is used as a rigid coating layer, so that the stability of the material is improved. And the surface of the nano silicon particles is coated with the composite material, so that impact can be resisted, irreversible deformation and fracture are avoided, the integrity of the structure is kept, and the lithium ion conductivity of the material in the charging and discharging process is improved. PPy is used as a flexible coating layer, coats the surface of the LBO layer, has relatively high flexibility and viscosity, and can adapt to volume expansion of silicon particles; the synergistic effect of the two improves the lithium ion conductivity and electrochemical performance of the nano-silicon negative electrode material.

The application discloses a kind of low dielectric loss chip packaging glass substrate and preparation method thereof, it is related to glass manufacturing technical field.The raw material composition of chip packaging glass substrate is: silicon dioxide, boron oxide, zirconium dioxide, germanium dioxide, aluminum oxide, gadolinium oxide, composite fluxing component, low-loss dielectric functional component;Composite fluxing component: raw material includes magnesium fluoride, lithium metaborate, strontium fluoride;Low-loss dielectric functional component: raw material includes silicon nitride, boron nitride micro powder, coupling agent solution.The preparation method of chip packaging glass substrate includes preparing composite fluxing component, preparing low-loss dielectric functional component, glass matrix forming, and the steps of obtaining chip packaging glass substrate.The chip packaging glass substrate prepared by the application has low dielectric loss and excellent mechanical properties.

This invention discloses a method for regenerating lithium borohydride using aluminum-based materials. The method involves simultaneously adding rare-earth-aluminum intermetallic compounds and lithium oxide, followed by solid-phase ball milling of aluminum and lithium metaborate dihydrate in a ball mill jar under non-oxidizing atmosphere or vacuum conditions to regenerate lithium borohydride. The addition of rare-earth-aluminum intermetallic compounds and lithium oxide additives improves ball milling efficiency, removes the aluminum oxide passivation layer, improves positive and negative hydrogen conversion, promotes lithium borohydride formation, and increases the yield of lithium borohydride. The rare-earth-aluminum intermetallic compound additives include inexpensive Al2Ce, Al3Ce, and Al... 11 One or more of Ce3, Al2La, and Al3La. This invention has the advantages of simple process, low cost, and easy industrialization.