73 results about "Platinum crucible" patented technology

The invention belongs to the technical field of chemical analysis, and particularly discloses a casting glass sheet method for quickly measuring potassium, sodium, silicon, calcium, magnesium, aluminum, titanium, sulfur and phosphorus in coal ash, which comprises the following steps: 1) preparing a sample casting glass sheet: putting a coal ash sample, anhydrous lithium tetraborate and lithium carbonate into a platinum crucible, uniformly mixing, dropwise adding an ammonium bromide solution, and stirring for 20-30 minutes; placing in an automatic sample melting machine to prepare a fuse piece, cooling, drying and storing for detection; and 2) XRF detection: constructing a standard working curve on an X-ray fluorescence spectrometer, and respectively testing the contents of potassium, sodium, silicon, calcium, magnesium, aluminum, titanium, sulfur and phosphorus in the sample casting glass sheet prepared in the step 1) by using the standard working curve. According to the method, borate high-temperature melting is adopted, so that the granularity effect, the mineral effect and the nonuniformity of the sample can be effectively eliminated, meanwhile, the absorption and enhancement effects among sample elements are well reduced, and the analysis precision and accuracy are improved.

The invention discloses a method for preparing an iron alloy sample by pre-oxidation melting, which comprises the following steps of: 1) filling a crucible with high-purity graphite, compacting, and making pits in the high-purity graphite; 2) uniformly mixing an oxidizing agent, a flux and a sample, adding the mixture into the pit, and oxidizing and melting under a high-temperature condition; 3) after melting and cooling, taking out the obtained glass frit; and 4) putting the taken glass frit into a platinum crucible for melting. The method can solve the problem that the platinum crucible is corroded when the glass fuse piece is prepared through high-temperature melting when the X-ray fluorescence spectrophotometer for preparing the glass sheet through melting is used for measuring all elements in the iron alloy.

The invention discloses a sodium carbonate alkali melting method for measuring multiple elements of soil or sediment, which comprises the following steps: selecting anhydrous sodium carbonate as a flux, putting the flux and a substance to be measured into a platinum crucible, transferring into a muffle furnace for heating, taking out, rotating, shaking and shaping, putting into tap water at room temperature for cooling, adding deionized water, heating for pyrolysis, and filtering to obtain a filtrate; soaking overnight for 24 hours, fully stirring with a plastic rod, washing with deionized water, dropwise adding 2ml of diluted hydrochloric acid, heating at low temperature, mashing fallen substances, stirring, adding nitric acid-hydrochloric acid mixed acid, dissolving, transferring, fixing the volume, uniformly shaking, filtering, directly measuring the boron element, and detecting on a machine after measuring that other elements are diluted by a proper multiple.

The invention relates to a method for preparing a sample wafer for X fluorescence analysis of bentonite by using a melting method, which comprises the following steps: 1) adding a flux and a bentonite sample into a crucible, dropwise adding a boric acid-glycerol solution, and stirring until the mixture is muddy; (2) adding a liquid oxidant into the crucible, uniformly stirring, wiping the head of the glass rod with quantitative filter paper, and putting the wiped filter paper into the crucible; and 3) firing the crucible on a high-frequency sample melting machine until the solid in the crucible is molten into a liquid state, adding a release agent, slightly cooling, and demolding to obtain the sample for X fluorescence analysis. The method has the advantages that the operation is simple, the flaking rate is high, and prerequisite conditions are provided for quickly, accurately and reliably measuring the primary and secondary components of the bentonite. According to the method, the sample does not need to be fired at high temperature by a muffle furnace in advance, the platinum crucible does not need to be pretreated, the detection period is remarkably shortened, and the power consumption cost is reduced.

The invention discloses high-alkali-resistance glass and a preparation method and application thereof.The preparation method comprises the steps that evenly-mixed ingredients are added into a platinum crucible at the temperature of 1400-1500 DEG C, the platinum crucible is placed in a lifting furnace to be subjected to heat preservation for 60-80 min at the temperature of 1550-1580 DEG C, then the crucible is taken out, and molten liquid is poured onto a mold; after the molten liquid is formed, quickly transferring the molten liquid into an annealing furnace, keeping the temperature at 550-580 DEG C for 30 minutes, and cooling the molten liquid to room temperature along with the furnace to obtain the high-alkali-resistance glass. The corrosion rate of the prepared high-alkali-resistance glass is 7-14 mg / dm < 2 >, the alkali resistance of the high-alkali-resistance glass is far lower than the industrial standard that the alkali resistance of the high-alkali-resistance glass is smaller than or equal to 75 mg / dm < 2 >, the weight loss of the glass in a NaOH solution with the ph being larger than 12 is small, and the high-alkali-resistance glass can be used for containing strong-alkali liquid medicine such as phenytoin sodium for injection and omeprazole for injection and other injections with the ph being larger than 11. And the problems of sheet falling or influence on liquid medicine quality caused by poor alkali resistance can be avoided.

The invention belongs to the field of single crystal growth, and particularly relates to a novel single crystal with ferroelectricity and ferromagnetic orderliness at room temperature and a growth method. Comprising the following steps: grinding a composition 1 and a composition 2 in an aluminum oxide mortar, putting into a platinum crucible, putting the platinum crucible into an aluminum oxide crucible, putting the aluminum oxide crucible into a single crystal growth furnace, adjusting a temperature program, cooling to room temperature, and taking out the platinum crucible; and S2, putting the platinum crucible taken out in the step S1 into a beaker, adding dilute nitric acid, and carrying out ultrasonic cleaning to obtain the novel ordered single crystal with ferroelectricity and ferromagnetic at room temperature. The high-temperature melting method is adopted for the first time to grow the novel single crystal with ferroelectricity and ferromagnetic ordered state at the same time under the room temperature condition, and the operation method is simple and easy to implement.

The invention belongs to the technical field of quantum dot glass ceramics, and relates to high-modulus multiphase quantum dot glass ceramics as well as a preparation method and application thereof. The microcrystalline glass comprises eucryptite (LiAlSiO4), lithium aluminate (LiAlO2) and quantum dots (CsPbBr3), wherein the eucryptite (LiAlSiO4) and the lithium aluminate (LiAlO2) are main crystalline phases. The surface of the LiAlO2 crystal phase is coated with the LiAlSiO4 crystal phase or gaps of the LiAlO2 crystal phase are filled with the LiAlSiO4 crystal phase to form a multi-phase reinforced structure, and the CsPbBr3 quantum dot glass ceramic has excellent water stability and deformation resistance. The preparation method comprises the following steps: respectively preparing a basic glass batch and a CsPbBr3 quantum dot precursor, and carrying out melting, water quenching and grinding on the glass batch to obtain basic glass powder; the preparation method comprises the following steps: placing a quantum dot precursor at the bottom of a platinum crucible by adopting a layered loading process, then covering basic glass powder, and finally obtaining the quantum dot microcrystalline glass through melting homogenization, casting molding and controlled heat treatment. The method is simple in process and high in controllability; the obtained product is excellent in comprehensive performance and good in application prospect.

The invention discloses an X-ray fluorescence spectrum detection method of metal manganese, which comprises the following specific steps: step 1, pre-oxidizing a series of standard samples of metal manganese and a sample to be detected, and melting at high temperature to prepare a uniform and smooth glass sheet; 2, measuring the X-ray fluorescence intensity of the to-be-measured element in the glass sheet prepared in the step 1 by using an X-ray fluorescence spectrometer, drawing a calibration curve of the to-be-measured element according to the X-ray fluorescence intensity of the to-be-measured element and the certificate value of the element in the standard sample, and calculating the X-ray fluorescence intensity of the to-be-measured element according to the calibration curve obtained in the step 2. And calculating the mass fractions of manganese, silicon, phosphorus, iron and other components in the metal manganese sample. The method comprises the following steps: dissolving, oxidizing and evaporating a manganese metal sample by using a dilute nitric acid solution, melting lithium tetraborate as a flux and cobalt as an internal standard element of manganese at high temperature by using a high-frequency melting furnace, and melting the sample and lithium tetraborate into a flat and smooth glass sample wafer, so that the glass sample wafer meets the analysis requirements of an X-fluorescence spectrophotometer and does not damage a platinum crucible.

Disclose in the present invention are flexible glass having a high elastic modulus and a preparation method therefor. The flexible glass is prepared from the following raw materials in percentage by weight: 55.0-60.0% of SiO2, 16.0-21.0% of Al2O3, 13.3-19.0% of B2O3, 2.8-13.0% of CaCO3, 2.2-3.4% of MgO, 0.3-1.8% of SrCO3, 0.1-4.4% of Ba(NO3)2, 0.8-2.0% of BeCO3, and additionally, on the basis of the total weight of the raw materials, 0.2-0.4 wt% of SnO. The raw materials are uniformly mixed and poured into a platinum crucible, melted clear at 1580-1700°C, then poured into a stainless steel mold for molding, transferred to an annealing furnace at 550-650°C for annealing and cooling, and subjected to thinning and strengthening processing.

The utility model provides a platinum crucible polishing device which comprises a drilling machine, the output end of the drilling machine is connected with a polishing head, the periphery of the polishing head is coated with a wool layer, and the wool layer is coated with a silicon dioxide nanofiber membrane. A circle of polishing bristles used for polishing the corners of the bottom face and the side face of the platinum crucible are arranged at the corner connecting position of the side face and the bottom face of the polishing head. Silicon dioxide is a common grinding aid, and can effectively remove an oxide layer, dirt and tiny flaws on the surface of the platinum crucible, so that the surface of the crucible is smoother; the wool has a soft fiber structure, can adapt to the curved surface and fine concave-convex parts of the crucible, and can be used for uniformly polishing the surface of the whole crucible, so that the polishing effect is ensured to be consistent; the fiber structure of the wool is very fine and smooth, so that obvious scratches or traces cannot be left on the surface of the platinum crucible; the wool fiber is soft and mild, does not cause excessive heat or friction, and does not damage or destroy the platinum crucible, so that the integrity of the crucible is protected.

A method for effectively reducing melting bubbles in an LTPS glass substrate. The LTPS glass substrate is composed of the following oxides in percentage: 62-65% of SiO2, 18-22% of Al2O3, 3.9-4.85% of CaO, 1.5-2% of B2O3, 4-5% of MgO, 5-6.8% of SrO2, and 0.10-0.15% of SrCl2, wherein the proportion of SiO2 + Al2O3 is 83-84%, and raw materials for introducing SrO are Sr(NO3)2, SrCO3, and SrSO4. The following steps are used for melting: uniformly mixing the raw materials of these components, melting the mixed raw materials at a high temperature of 1690-1720°C for 8-15 hours, pouring clear molten glass into a mold from a platinum crucible for molding, and then placing the mold in a muffle furnace for precise annealing to obtain LTPS glass.

The invention relates to the technical field of beta-Ga2O3 crystal material growth, in particular to a fluxing agent of a beta-Ga2O3 crystal and a preparation method of a single crystal X-ray detector of the fluxing agent. A fluxing agent for growing the beta-Ga2O3 crystal comprises tellurium oxide and divalent alkaline earth metal carbonate. Uniformly mixing gallium oxide and a fluxing agent to obtain a mixed material; transferring the mixed material into a crystal growth furnace, and heating to melt the mixed material to obtain a melt; and cooling the melt to 0.5-3 DEG C above the saturation point temperature, putting a seed crystal into the melt, cooling to enable the crystal to grow, taking out the crystal after the growth is finished, and cooling to room temperature to obtain the beta-Ga2O3 crystal. The fluxing agent provided by the invention does not contain toxic components such as lead, fluorine and the like, the crystal growth temperature range of the fluxing agent is approximately 780-850 DEG C, the growth temperature of the crystal is effectively reduced, the volatilization of a melt at a high temperature is reduced, the deviation and viscosity of solution components are reduced, the corrosion to a platinum crucible is reduced, and the beta-Ga2O3 crystal with high quality and large size is easy to obtain.

The invention relates to a method for cleaning a platinum crucible with a water jet cutter grinding and polishing surface. According to the scheme, a vacuum overturning suction cup (15) is used for sucking the outer bottom or the inner bottom of a crucible (14), a nozzle (10) is aligned to any point of the inner surface or the outer surface of the crucible, the inner wall, the outer wall, the inner bottom face and the outer bottom face of the crucible (14) are cleaned through water jet flow, and first cleaning is completed; the crucible (14) is dried through hot air and normal-temperature air, and the mass of the crucible (14) cleaned for the first time is weighed and recorded as m1g; the second time of cleaning is repeated, and the mass of the repeatedly cleaned crucible is weighed and recorded as m2; the difference value of m1-m2 is calculated, and the difference value is lt; when the weight is 0.001 g, cleaning is stopped; the difference value is gt; when the weight is 0.001 g, repeatedly cleaning to a difference value lt; when the weight is 0.001 g, the cleaning is stopped; and washing with pure water, and blow-drying to obtain the clean crucible. The method is free of acidic emissions and environment-friendly, the efficiency is improved, and pollution errors are reduced.

The utility model discloses a moving and overturning device for a glass experiment. The moving and overturning device comprises a moving carrier, an overturning platform, a limiting plate and a clamp, the movable carrier is installed on the limiting plate, the overturning platform is rotatably installed on the movable carrier through a rotating shaft, a bottom plate is arranged at the bottom of the overturning platform, a bottom face heat insulation plate is arranged on the bottom plate, a first vertical plate is arranged on one side of the overturning platform, second vertical plates are connected to the two sides of the first vertical plate, and a first vertical face heat insulation plate is arranged on one side of the first vertical plate. A second vertical face heat insulation plate is arranged on one side of the second vertical plate, the first vertical plate and the second vertical plate form a U-shaped frame, and one end of the clamp is supported on the movable carrier. According to the utility model, the platinum crucible and the lining thereof can be quickly moved out of the heating furnace platform through the moving and turning device, and molten materials are quickly poured into a preset sample preparation mold by using the turning platform, so that the success rate of sample preparation of the large-capacity platinum crucible is improved, and the safety risk in the process is reduced.

The present invention discloses a device and method for laser-assisted growth of large-size X-axis lithium niobate crystals, and relates to the technical field of lithium niobate crystal material preparation. The device includes a single crystal furnace, which includes a furnace body, an induction coil and a platinum crucible from the outside to the inside, and a corundum insulation barrel is also provided between the induction coil and the platinum crucible. A glass cover is provided on the top of the corundum insulation barrel, and a seed hole is opened in the center of the glass cover. A seed rod and a laser assembly are provided on the top of the furnace body, and the seed rod passes through the seed hole and extends into the platinum crucible; the laser assembly includes a laser, a conical lens, and a spherical mirror, and the laser is located directly above the seed rod. The present invention adopts beam shaping technology, and the interaction between the annular laser beam and the melt can regulate the local temperature gradient around the growth interface, thereby achieving the purpose of regulating the crystallization rate of each axial direction, and effectively solving the problems of heterogeneous nucleation and twinning caused by the large difference in the growth rate of each crystal face in the shouldering stage of crystal growth.

The invention relates to a method for rapidly determining the content of molybdenum in ferromolybdenum, and belongs to the field of measurement of metal molybdenum. The method comprises the following steps: 1) dissolving a sample: weighing a ferromolybdenum sample in a beaker, adding a dissolving acid, covering a watch glass, and heating to completely dissolve the ferromolybdenum sample; 2) interference ion masking: adding water and a masking agent into the solution; 3) pH adjustment: adjusting the solution to weak acidity, and adding a buffer solution to maintain the pH value of the solution; 4) precipitating and aging: heating the solution to near boiling, adding a precipitating agent to precipitate the molybdenum element, and aging; 5) filtering and firing: after the solution is cooled, filtering the solution with quantitative filter paper, washing the precipitate, adding ammonium oxalate as a stabilizer, carbonizing with a constant-weight platinum crucible, and firing to constant weight; the method is simple in step and convenient to operate, and compared with an existing gravimetric method (the analysis period is shortened by at least 4 hours, the accuracy is higher, and the precision is better.

The invention provides a preparation method of a rare earth ion doped yttrium ferrite single crystal. The preparation method comprises the following steps: weighing Re2O3, Fe2O3 and Y2O3 according to the stoichiometric ratio of each element shown in the chemical formula; wherein Fe2O3 is excessive by 5-8% so as to compensate defects caused by volatilization of iron ions; nb2O5 is doped to compensate radius mismatch caused by doping of rare earth ions, and the doping range of Nb2O5 is 1-5% of the content of Re2O3. Then mixing a fluxing agent KCl-LiCl-B2O3 according to a molar ratio of (35 to 42): (35 to 42): (16 to 30) to form a mixed raw material; putting the mixed raw material into a platinum crucible, and heating the inside of the platinum crucible to 1170-1200 DEG C; carrying out heat preservation on the interior of the platinum crucible; cooling the inside of the platinum crucible to 1050-1100 DEG C, and inserting the seed crystal into the platinum crucible; continuously cooling, and rotating the seed crystal; cooling the inside of the platinum crucible to 900-950 DEG C, and finishing crystal growth; and lifting the crystal away from the liquid surface for cooling and annealing to obtain the rare earth ion doped yttrium ferrite single crystal. According to the invention, doping uniformity control, centimeter-level crystal growth, impurity blocking and lattice stress elimination are realized.

The name of the utility model is a scratch-proof platinum crucible transportation device. Belongs to the technical field of optical glass platinum crucible transportation and placement. The device mainly solves the problems that the platinum crucible is easy to deform and scratch during installation and transportation and the structure of the platinum crucible is easy to damage during hoisting. The device is mainly characterized by comprising a support ring and a support ring support frame, the diameter of the support ring is smaller than the maximum diameter of the outer upper part of the platinum crucible; the space of the inner side of the supporting ring supporting frame is larger than the space occupied by the platinum crucible. According to the device, a platinum crucible is placed on the inner wall of the supporting ring, a platinum tube is fixed in the supporting clamping groove, therefore, the platinum crucible is prevented from being scratched and deformed due to shaking in the transportation and placement process, the transportation risk is reduced, it is guaranteed that the structure is not damaged, in addition, the supporting ring is sleeved with glass fiber cotton, and the situation that stainless steel is attached and rubbed with the platinum crucible due to high hardness is avoided. The device is mainly used for transporting and placing the platinum crucible.

The utility model discloses a pilot plant test furnace platinum crucible for glass ceramic production, which comprises a melting pot body, an omega-shaped expansion structure is arranged in the circumferential direction of the pot body, a split pot cover is arranged above the melting pot body, a discharge pipe is connected below the melting pot body, a grating filter screen with a V-shaped structure is arranged inside the melting pot body, a bubbling pipe is arranged on the split pot cover, and the bubbling pipe is connected with a nozzle. An electrode is arranged at the bottom of the discharging pipe; the problems of thermal stress deformation and fatigue cracking caused by alternate cooling and heating are effectively solved by arranging an omega-shaped expansion structure and a grid filter screen of a V-shaped structure on the periphery of the melting pot body, the problems that a traditional barrel-shaped platinum crucible is prone to thermal shock deformation and cracking and the like are solved, the blowing-out maintenance and shaping frequency is reduced, the service life is remarkably prolonged, and the production cost is reduced. And under the condition of the same volume, the usage amount of platinum is reduced by more than 20% compared with that of a traditional barrel-shaped platinum crucible, and the manufacturing cost of the platinum crucible is remarkably saved.

The invention provides a preparation method of a CeF3 doped M type barium ferrite single crystal. The preparation method comprises the following steps: S1, drying raw materials BaCO3, Fe2O3 and CeF3 and a fluxing agent LiF-NaF-B2O3; s2, raw materials BaCO3 and Fe2O3 are weighed, meanwhile, a proper amount of CeF3 powder is added, the raw materials and a fluxing agent LiF-NaF-B2O3 are mixed, and a mixed raw material is obtained; s3, putting the mixed raw material into a platinum crucible, sealing the platinum crucible, and filling protective gas; s4, the platinum crucible is heated, the temperature of the interior of the platinum crucible is increased to 1120-1200 DEG C, heat preservation is conducted, and the mixed raw materials are fully molten and homogenized; s5, cooling the interior of the platinum crucible to 990-1030 DEG C, lt; 001gt, 001gt; inserting the oriented seed crystal into a platinum crucible, and then cooling to 900-950 DEG C; s6, rotating the seed crystal, and meanwhile, adopting a lifting mode; and S7, annealing treatment is carried out, such that a complete single crystal is obtained. According to the invention, stable doping of Ce < 3 + > ions is realized, a pollution-free preparation process is adopted, large-size single crystals are prepared, and the performance of the prepared single crystals is optimized.

The utility model discloses an air tightness detection device for a thin-wall crucible. The air tightness detection device comprises a supporting module and a connecting module, the supporting module comprises a base, a first support and a second support, the connecting module is provided with a sleeve, the center of the sleeve is provided with a penetrating gas channel, the outer wall of the sleeve is provided with threads, and the sleeve can be in threaded connection with the first support and the second support. And the sleeve is externally connected with a one-way valve and a barometer through the leak detection pipe. When the device is used, the thin-wall crucible is hermetically connected with the sleeve of the connecting module, gas is introduced, and the pressure is close to or equal to the air pressure borne by the crucible during actual growth, so that the pressure state of the thin-wall platinum crucible in a high-temperature environment during crystal growth can be effectively simulated, and the processing quality of the thin-wall crucible is further optimized; the yield is obviously improved; and the production cost is effectively reduced.

This application provides a manufacturing method of a platinum crucible for crystal growth, the manufacturing method comprising the following steps: melting platinum in a composite crucible and casting it into a platinum ingot; hot forging, rolling, first annealing, rough spinning, second annealing, fine spinning, and third annealing of the platinum ingot to produce the platinum crucible for crystal growth. In the platinum crucible manufactured by the manufacturing method of the present application, the surface of the platinum crucible is smooth, the structure is uniform, and the thickness is constant. The sheet is formed in one go, and the outer edge does not need to be welded. Product quality is significantly improved compared to traditional welding methods. By using a composite crucible to purify platinum during the melting process, the leakage rate of the platinum crucible during crystal growth is reduced.The platinum crucible can also be repeatedly melted and spun to produce a platinum crucible, so that platinum can be recycled.

The invention belongs to the technical field of artificial crystals, and particularly discloses a hollowing-free high-quality bismuth vanadate single crystal and a preparation method thereof. The preparation method comprises the following steps: mixing bismuth oxide and vanadium pentoxide to obtain a mixed raw material; then putting the mixed raw material into a platinum crucible, and heating for reaction to obtain bismuth vanadate; placing the obtained platinum crucible with bismuth vanadate in a pulling furnace, and preparing the hollowness-free high-quality bismuth vanadate single crystal by adopting a pulling method; the heating mode of the Czochralski method is medium-frequency induction heating. According to the invention, the heating mode is changed, so that the heat in the bismuth vanadate melt in the crucible can be quickly transferred and uniformly distributed, thereby keeping stable temperature distribution, realizing better thermal field stability, laying a foundation for preparing high-quality bismuth vanadate single crystals, and effectively preventing the generation of crystal hollowing. In addition, an iridium crucible is replaced by a platinum crucible, the pulling atmosphere does not need to be controlled, and low-cost preparation of the bismuth vanadate single crystal is facilitated.

Disclosed are a high-strength coverglass and a preparation method therefor, belonging to the technical field of glass manufacturing. The high-strength coverglass is prepared from the following raw materials: 56-65wt% SiO2, 15-22.5wt% Al2O3, 3-9wt% MgO, 9-15wt% Na2O, 3-6wt% K2O, 0.2-1.2wt% CaO, 0.2-1.2wt% SrO, 0.5-1.8wt% ZrO2, and 0.1-0.5wt% SnO. According to a specific proportion, the raw materials are placed into a mortar and mixed uniformly, then poured into a platinum crucible, which is then placed into a resistance-type high-temperature box for melting; once melting and fining is complete, the mixture is poured into a mold for molding, annealing, and cooling. The disclosed coverglass is high in strength, has a high elastic modulus, improved fragmentation resistance, and high light transmittance, and the properties of thereof are suited to float process production of coverglass that can be used in display products.

The invention provides a preparation method of an M-type barium ferrite single crystal, which comprises the following steps: S1, weighing raw materials BaCO3 and Fe2O3, mixing the raw materials to obtain a primary mixture, and mixing the primary mixture with a fluxing agent LiF-NaF-B2O3 to obtain a mixed raw material, s2, the mixed raw materials are put into a platinum crucible, the temperature is increased to 1200-1270 DEG C, and then heat preservation is conducted; s3, the platinum crucible is cooled to 1100-1150 DEG C, and then a tilt part is inserted; 001gt, 001gt; an oriented seed crystal; s4, continuously cooling, and rotating the seed crystal; s5, after the platinum crucible is cooled to 970-1000 DEG C, crystal growth is finished; and S6, lifting the crystal away from the liquid level, and carrying out annealing treatment to obtain the M-type barium ferrite single crystal. The problems of small crystal size, toxic pollution and microwave performance degradation in the prior art are solved, and size bottleneck breakthrough, pollution-free process, component stability control and microwave performance optimization are realized.

The application relates to a free radical polymerization method of high-polymerization-degree high-temperature-resistant inorganic materials, and the technical scheme is as follows: iron oxide powder, aluminum oxide powder, silicon dioxide powder and calcium oxide powder are uniformly mixed according to the mass ratio of 0.1-4:1 to prepare oxide mixed powder; the oxide mixed powder is filled into a platinum gold crucible and heated to complete melting under a protective atmosphere; after being kept stable for 3-10 minutes under the protective atmosphere or an oxidation atmosphere, polymerization monomer powder is added into active oxide melt containing free radicals according to the mass ratio of 0.1-1:1, chain-type chain polymerization is carried out under the protective atmosphere for 5-30 minutes, the temperature is reduced to room temperature at a speed of 50-1000 DEG C / s, and high-polymerization-degree inorganic materials are obtained. The application has the advantages of simple preparation process, short cycle, high polymerization degree of the prepared high-temperature-resistant inorganic materials, excellent high-temperature service performance, and the like, and can significantly improve the strength and toughness of high-temperature ceramic materials.

This invention discloses a method for detecting the alumina content in aluminum-manganese-calcium alloys, mainly solving the technical problem that existing methods cannot accurately and rapidly detect the alumina content in aluminum-manganese-calcium alloys. The technical solution is as follows: a method for detecting the alumina content in aluminum-manganese-calcium alloys, comprising: 1) sample preparation: after removing the oxide layer on the sample surface, the sample is placed in a reagent bottle containing organic solvent for storage; 2) alumina extraction from the sample: first, alumina is extracted from the sample by electrolysis, the sample is placed in an electrolytic cell for electrolysis, the sample is the anode, a platinum electrode is the cathode, and a saturated calomel electrode is the reference electrode; 3) detection of alumina in the sample: the filter membrane and filter material from step 2) are placed in a platinum crucible, and the filter membrane is removed by high-temperature ashing; 4) calculation of the mass percentage of alumina in the aluminum-manganese-calcium alloy. The method of this invention for determining the alumina content in aluminum-manganese-calcium alloys has a relative standard deviation (RSD) of less than 3%, indicating good precision, accuracy, and reliability of the detection data.

The application discloses a sodium carbonate alkali fusion method for measuring multiple elements in soil or sediment, and comprises the following steps: selecting anhydrous sodium carbonate as a flux, placing the flux and a to-be-measured object into a platinum gold crucible, moving the platinum gold crucible into a muffle furnace to heat, taking out the platinum gold crucible to shake and shape, placing the platinum gold crucible into room-temperature tap water to cool, adding deionized water, heating and pyrolyzing, soaking for 24 hours, fully stirring with a plastic rod, washing with deionized water, adding 2ml of dilute hydrochloric acid, heating at low temperature, crushing the fallen substances, stirring and adding nitric acid-hydrochloric acid mixed acid, dissolving and transferring, constant volume and uniform shaking, and after filtration, the obtained solution can be directly used for measuring boron elements, and after dilution with an appropriate multiple, the solution can be used for detecting other elements.

The present invention relates to a method for effectively reducing bubbles in the melting of LTPS glass substrate, which is composed of the following percentages of oxides: SiO 2 62~65%, Al2O318~22%, CaO 3.9~4.85%, B2O 3 1.5~2%, MgO 4~5%, SrO 5~6.8%, SrCl20.20~0.25%, among which SiO2+Al2O 3 83~84%; the raw materials for SrO are Sr(NO3)2, SrCO3 and SrSO4. The following steps are taken for melting: the raw materials of each component are mixed evenly, melted at a high temperature of 1690~1720℃ for 8~15 hours, the melted and clarified glass liquid is poured into a mold from a platinum crucible to form, and then enters a muffle furnace for precision annealing to obtain LTPS glass. The number of bubbles per unit volume in the LTPS glass of the present invention is significantly better than that of conventional glass, achieving an excellent clarification effect.

FIELD: inorganic chemistry.SUBSTANCE: invention can be used in magnetic, optical, magneto-optical, X-ray and resonance studies, as well as in new generation synchrotron technologies. A charge is prepared comprising, by wt.%: (Fe2O3 + Ga2O3) 4.9; B2O3 58.3; PbO 25.0; PbF2 11.8. The prepared charge is melted in small portions into a platinum crucible at 870 °C, which is then placed in the gradient-free zone of the growth furnace and heated for melting to 900 °C for 4 hours. A platinum crystal holder is lowered into the resulting melt solution, rotating it at a speed of 20-60 rpm, and homogenized at this temperature, holding for 20-24 hours. After this, temperature surges are carried out cyclically, consisting of rapid cooling with holding and heating with holding. During the first and second cycles of temperature surges, the temperature is sharply reduced to 800-820 °C for 20 minutes and maintain at this temperature for 2-4 hours, then heat to 900 °C for 20 minutes and maintained at this temperature for 4-12 hours. In the third cycle, the temperature is sharply reduced to 800-810 °C for 20 minutes and kept at this temperature for 2-3 hours, then heated to 830-835 °C in 20 minutes and maintained at this temperature for 3-4 hours. After the specified temperature changes, the temperature is sharply reduced in 15 minutes to 805-810 °C and isothermal holding is carried out for 0.5-1 hour, during which the rotation of the crystal holder is turned off. Then smooth cooling is carried out at a rate of 0.1-0.3 °C / h up to 780 °C, the synthesized crystals are released from the crucible by smoothly removing the crystal holder from it at a speed of 0.5 cm / min. Final cooling of the furnace is carried out for 4-6 hours to a temperature of 500 °C with subsequent shutdown. The invention makes it possible to grow single crystals of Fe1-xGaxBO3, where 0≤x<0.2, in the form of plates up to 5 mm in diameter.EFFECT: improved performance.1 cl, 2 dwg, 3 ex