61 results about "Congruent melting" patented technology

The invention relates to a method for preparing soluble glass by using waste residues with aluminum extracted by coal gangue. The method comprises firstly mixing and grinding the waste residue with aluminum extracted by coal gangue and sodium carbonate to be 1-50mu m particles, then conducting temperature programming in a muffle furnace, conducting low temperature congruent melting reaction for 1-5 hours at the temperature of 500-850 DEG C, and conducting water quenching to obtain coarse sodium silicate solid; and placing the coarse sodium silicate solid in a high pressure reactor, adding distilled water, heating to be 150 DEG C, stirring and dissolving for 5 hours, cooling to be room temperature, filtering and separating to obtain a colorless and transparent sodium silicate solution, and crystallizing to be the soluble glass. The method lowers the temperature for preparing sodium silicate by using a traditional soda ash method by about 600 DEG C, greatly reduces energy consumption, and simultaneously avoids highly corrosive of a traditional caustic soda alkali-dissolution method on production facilities and alkali pollution on the environment.

The method includes following steps: (1) aligning chip with close over and making plastic parts to be bonded contact tightly; (2) guiding laser beam to penetrate through transparent plastic layer to reach the location to be bonded, laser irradiation making plastic layer and coating layer be melted; (3) controlling time and intensity of laser energy, making congruent melting between two materials. The device includes laser light source system, laser beam transformation system, workpiece alignment platform, offset table, servo controller and microcomputer main control system. The advantages of the invention are fast heating up and small heat affected zone, easy to be controlled by computer, high efficiency and reliability.

The invention relates to a method for determining the steel belt feeding process parameter of a crystallizer in the thick slab continuous casting process. The method comprises the steps the work condition parameter of the crystallizer in the thick slab continuous casting process is collected, and the feeding quantity of a cold steel belt is determined through the work condition parameter of the crystallizer in the thick slab continuous casting process based on the liquidus congruent melting and phase change heat transfer theory; a continuous casting slab-cold steel belt system phase change heat transfer theoretical model is built through a generalized enthalpy method, namely, a relation model among the melting time and feeding thickness of the cold steel belt, the superheat degree of casting molten steel and the initial temperature of the cold steel belt; the section size and feeding speed of the cold steel belt are determined through the continuous casting slab-cold steel belt system phase change heat transfer theoretical model according to the feeding quantity and melting time of the cold steel belt and the depth of a solidified liquid core; and the cold steel belt with the determined section size and feeding speed is preheated and fed into molten steel in the crystallizer through the position between a water opening and a narrow face of the thick slab crystallizer parallel to the wide face of the crystallizer in a low-amplitude high-vibration manner.

A photocatalyst in the form of magnetic float microbead for photocatalytic degradation of the pollutant flaating on water surface (such as petroleum, oil, organic matter, etc.) is prepared through mixing nanometre Ni or Zn ferrite and the general glass powder, congruent melting to make up polycrystalline complex, after pulverizing, spraying it in cold water by oxyacetylene flame sprayer to obtainhollow magentic glass microbeads floating on water, compounding photocatalytic TiO2 film on the surface of micro bead, and holding temp at 500-550 deg.C for 2-3 hr. After used, the said catalyst can be recovered magnetically to prevent secondary pollution.

The invention provides a process for preparing postassium stannate comprising, producing beta-stannic acid by tin and concentrated nitric acid, heating betastannic acid and potassium hydroxide for congruent melting into solution, cooling down, watering for dissolution, filtering, evaporating and concentrating to separate crystallized product of postassium stannate. The process according to the invention can be applied to obtain high purity postassium stannate end product with the yield over 98.5%, thus is suitable for industrial mass production.

The present invention provides a phase change non-volatile memory material comprising a base material and at least one non-metallic light element selected from the group consisting of boron, carbon, nitrogen and oxygen, wherein the base material has a composition which corresponds to either that of congruent melting of the type with a minimum melting point or that of eutectic melting within the range of ±0.15 atomic fraction for each constituent element, thereby having a melting temperature of 600° C. or lower. The phase change non-volatile memory material according to the present invention may be utilized to reduce the electric power needed for reset/set operation and thermal interference between memory cells.

The invention relates to a compound sodium metaborate birefringent crystal and a preparing method and application thereof, in particular to a sodium metaborate birefringent crystal with a molecular formula of NaBO2 used in the deep-ultraviolet-infrared waveband. The chemical formula of the crystal is NaBO2, molecular weight is 65.8, the crystal belongs to a trigonal system, space group is shown in the description, and cell parameters a=11.8617angstroms, b=11.8617angstroms, c=6.3957angstroms, V=590.93 cubic angstroms, and Z=4; light-pervious range is 180-3500 nm, and birefringence is between 0.09(3500 nm) and 0.23(180 nm). Crystal growth is conducted with a high-temperature melt method or high-temperature solution method. The crystal is moderately hard and easy to process, growth is easy due to congruent melting, and birefringence is high; the crystal has a high application value in the optical and communication fields and can be used for preparing optoisolators, circulators, light beam displacers, optical polarizers or optical modulators.

The invention relates to a method for selectively separating a phenol mixture from oil, which comprises the following steps: by using a quaternary ammonium salt as a separating agent, selectively forming a congruent melting liquid from the separating agent and phenol compounds (phenol, cresol and dimethyl phenol) in the oil at 0-30 DEG C, thereby separating the phenol compounds from the oil; and carrying out back extraction on the phenol compounds containing the congruent melting liquid to separate the phenol substances from the quaternary ammonium salt, thereby obtaining the product and recovering the extractant. The method has the advantages of simple technique, low separate cost and environment friendliness.

The invention relates to a sodium lithium borate birefringent crystal, and a preparing method and uses thereof. The chemical formula of the crystal is Li<2>Na<2>B2O5, the molecular weight of the crystal is 161.4, the crystal belongs to an orthorhombic system, and the space group is Cmcm. According to cell parameters, a is 3.313 angstroms, b is 9.985 angstroms, c is 13.400 angstroms, V is 443.3 angstrom<3>, and Z is 4. The transparent range of the crystal is 170-3500 nm. The birefringence of the crystal is between 0.108 (1064 nm) and 0.248 (200 nm). The sodium lithium borate is synthesized by adopting a solid phase reaction process. The Li<2>Na<2>B2O5 birefringent crystal grows by adopting a high-temperature melt process or a cosolvent process. The crystal prepared by the method has characteristics of proper mechanical hardness, easy cutting, polishing and storage, congruent melting, easy growth and a high birefringence, has important applications in the optical and communication fields, and can be used for manufacturing polarizing beam splitter prisms, phase delay devices, electrooptical modulators, and the like.

The present invention relates to a terbium vanadate-doped magneto-optical crystal, a growth method and applications thereof. According to the present invention, the molecular formula of the terbium vanadate-doped magneto-optical crystal is CaxMyTb1-x-yVO4, wherein M is a rare earth element and an alkali metal element, x is more than or equal to 0.01 and is less than or equal to 0.5, and y is more than or equal to 0 and is less than or equal to 0.5; the faraday rotation angle of the series of the crystals at 1064 nm is 1.3-1.5 times the faraday rotation angle of the TGG crystal, the crystal has the congruent melting property and can grow through a Czochralski method, the large size crystal easily grows, the raw material cost is low, and the magneto-optical crystal cost can be effectively reduced; the magneto-optical crystal device prepared from the magneto-optical crystal has the large Verdet constant during magneto-optical isolator production, such that the requirement on the magneto-optical crystal length can be reduced; and compared with the magneto-optical crystal in the prior art, the magneto-optical crystal of the present invention has advantages of compact device design, reduction of the number of the magneto-optical crystals used in the isolator, cost reducing and the like. The terbium vanadate-doped magneto-optical crystal of the present invention can further be used for optical switch production.

The invention discloses an apatite type silicate terbium magneto-optical crystal which is high in transmittance rate and high in Verdet constant in a visible-near infrared region and a preparation method thereof. The crystal grows by a melt pulling method; the molecular formula is Tb(10-x)(SiO4)6O(3-1.5x), wherein x is equal to 0-2; the crystal belongs to a hexagonal crystal system, and the space group is shown in the specification. The magneto-optical crystal has a good magneto-optical effect, and the Verdet constant of the magneto-optical crystal is higher than that of the conventional commercially applied terbium-doped glass and terbium gallium game (TGG) crystals; meanwhile, at the waveband of 400-1,500nm except for 485nm where the magneto-optical crystal has a feature absorption peak of the Tb<3+> ion, the magneto-optical crystal has high transmittance rate at other waveband; particularly within the visible light waveband of 400-650nm, the transmittance rate of the magneto-optical crystal is obviously increased as compared with that of the TGG crystal, so that the magneto-optical crystal has a good application prospect when used as a magneto-optical material; furthermore, the magneto-optical is a congruent melting compound and can grow by an intermediate-frequency induction pulling method; the growth technology is simple, the period is short, and large-scale and low-cost batch production can be realized.

The invention relates to a production method of antibacterial sucrose fatty acid esters. Three fatty acid methyl esters or fatty acid ethyl esters and sucrose used as raw materials react in a reaction kettle provided with a high-speed shearing/dispersion/emulsification homogenizer by using potassium carbonate as a catalyst and sucrose fatty acid esters as an emulsifier by a solventless process to obtain the antibacterial sucrose fatty acid esters. The material mixing is accelerated under the high-speed shearing/emulsifying effects of the high-speed shearing/dispersion/emulsification homogenizer to achieve the microemulsion state within a short time, so that the sucrose fatty acid ester synthetic system can react more uniformly and achieve the congruent melting state quickly, thereby increasing the reaction speed, shortening the reaction time and further effectively enhancing the conversion rate of the reaction product sucrose fatty acid esters and the contents of sucrose monoesters and total esters in the product.

The invention provides a low-temperature ceramic and a preparation method thereof. The low-temperature ceramic comprises a low-temperature green body and low-temperature glaze, wherein the low-temperature green body comprises, by weight part, Te-hua clay, Te-hua knar clay, Te-hua low-temperature stone, Te-hua wollastonite and Te-hua dolomite. The Te-hua wollastonite, the Te-hua low-temperature stone, the Te-hua dolomite, the Te-hua knar clay, the Te-hua clay and other raw materials are utilized, and through a reasonable proportion, the ceramic forming firing temperature is made to be reduced to 1120 DEG C. According to the principle, the Te-hua clay, the Te-hua knar clay, the Te-hua low-temperature stone, the Te-hua wollastonite and the Te-hua dolomite are utilized, the ratios of alkali metal oxides K2O and N2O and alkaline earth metal oxides CaO and MaO in pug are increased, a solid-phase reaction between SiO2 and Al2O3 is stronger at a low temperature, a low-temperature congruent melting effect is achieved, so that the firing temperature is reduced, and therefore, a lot of energy sources can be saved.

The invention discloses a Ba3P3O10C1 single crystal and a preparation method thereof. The molecular formula of the crystal is Ba3P3O10C1, the lattice parameters of the crystal are as follows: a=14.277(17)*10<-10>, b=5.5968(4)*10<-10>, c=14.1592(4)*10<-10>, V=1131.41(19)*10<-30>, and Z=4. The crystal has good non-linear optical property and is a phase match compound; the second-order frequency-doubled effect intensity of the crystal is 0.6 times of that of KDP (KH2PO4), and the shortwave adsorption side of the crystal can reach 180nm, and therefore, the crystal has potential non-linear optics application value. The crystal also has excellent thermal stability. The comprehensive thermoanalysis test result shows that the crystal is a congruent melting compound.

A process for preparing water-retaining agent used for edible mushroom cultivation fungus sticks belongs to the field of agricultural materials. The water-retaining agent is formed by utilizing wax, resin and oil as main components and utilizing white carbon black and/or carbon black and the like as filling materials, and weight proportion of the water-retaining agent includes that the wax takes 15%-70%, the resin takes 10%-60%, the oil takes 1%-20% and the filling materials take 0.1%-5%. The oil and the wax in the ingredient perform congruent melting, the resin is added after the wax is completely melted basically, or the oil, the wax and the resin in the ingredient perform congruent melted at temperature of 100-120 DEG C, are added with the filling materials after the resin is melted completely and then is cooled and shaped to obtain the water-retaining agent. The water-retaining agent is nontoxic, can be safely used for cultivating food materials, is excellent in water-retaining property, and has fine water-retaining property which is more excellent than paraffin wax used as water-retaining agent by 30%-80%, and coating of the water-retaining agent in a melting state can be dried fast, thereby bringing convenience for farmers. In addition, the water-retaining agent has certain elasticity and plasticity, can be freely expandable along with moisturizing and evaporation of the fungus sticks, and is favorable for growth of mushrooms with normal and attractive mushroom shapes. Moreover, after being added with the filling materials, the water-retaining property of the water-retaining agent can be improved, and then the water-retaining agent has a function of identifying appearances of products.

The invention provides a powdery mixture containing phytosterol and oryzanol and a preparation method thereof. The powdery mixture contains the phytosterol, the oryzanol and at least one emulsifier. The granular diameter of the powdery mixture ranges from 0.04 micrometer to 100 micrometers. The powdery mixture maximizes the lipid-reducing effects of the phytosterol and the oryzanol by utilizing the synergistic effect of the phytosterol and the oryzanol. According to the preparation method, the dimension of the powdery mixture is controlled by first congruent melting and then cooling solidification, the obtained granular diameter ranges from 0.04 micrometer to 100 micrometers, and the bioavailability of the powdery mixture is greatly improved; and the powdery mixture can reduce the serum total cholesterol, the low density lipoprotein cholesterol and the triglyceride after being eaten and also be used for various foods taking no matter any food as bases and has outstanding dispersion stabilization.

The invention discloses a crystal growing device. The crystal growing device comprises a furnace body, a furnace body bracket used for supporting the furnace body and a furnace chamber located in the furnace body, wherein the furnace chamber comprises a high temperature zone located at the upper end and a low temperature zone located at the lower end; a lifting device is arranged on the furnace body bracket to control lifting of a crucible support rod in the furnace chamber and further control reciprocating motion of a to-be-heated raw material between the high temperature zone and the low temperature zone. The crystal growing device is novel and simple in structure, not only can adapt to growth of Ba3P3O10Cl single crystals, but also can adapt to crystal growth of a series of easily-oxidized and non-congruent melting compounds or compounds with the decomposition temperature lower than the melting point and has wide application value.

The invention relates to silicon nitride eutectic and a manufacturing method and an application thereof. Total nitrogen concentration in the silicon nitride eutectic is 1E16 to 7E18 atom/ccm. The silicon nitride eutectic is used for the adulteration of the nitrogen in the preparation process of czochralski crystal. The proper amount of the nitrogen which is added in the growing method of single silicon crystal made by czochralski (CZ) does not affect the growth of the single crystal and can control the concentration and the size of crystal defect, namely 'COP' or 'voids' in the crystal, which is one primary cause that affects the function of an integrated circuit. The adulteration of the silicon nitride eutectic stabilizes the adulteration and shortens melting time.

Disclosed is a general glass fiber vitrolite and its industrial production method, wherein the board comprises ceramic raw material, color glaze and inorganic fiber, the framework is a net form structure of interlaced inorganic fiber layers, and is integrated through agglutination and congruent melting, the surface is compact and smooth.

The invention discloses a raw materials formula for synthetic sucrose fatty ester and a synthetic method thereof, belonging to the chemical field. The raw materials formula includes, based on the weight part, 50 to 100 parts of sucrose, 20 to 80 parts of fatty acid methyl ester or ethyl ester, 0.2 to 8 parts of catalyst, 5 to 50 parts of fatty acid cationic soap salt, 1 to 20 parts of modified phospholipids, 0 to 8 parts of sucrose ester (HLB is 5 to 15) and 0 to 6 parts of sodium lactate. In the invention, the method that the composite catalyst is added in the system for synthesizing sucrose ester by the solvent-free method is adopted. The modified phospholipids are added so that the reaction in the system for synthesizing sucrose ester is more uniform, the congruent melting can reach rapidly, thus effectively improving the conversion rate of the sucrose ester and the content of the sucrose monoesters and total esters in the products.

Disclosed is an energy storage building material and preparing method, wherein the material is prepared by mixing heptadecane, octadecane, nonadecane, and eicosane by a certain proportion. The preparation process consists of heating organic phase change energy-storage material to form congruent melting mixture, packaging in spherical or cylindrical hollow plastic chambers with good thermal conductivity, then filling the spherical or cylindrical energy-storage members into the cavities of the hollow bricks. The invention can solve the problem of leakage and corrosion of the liquid phase energy-storage material.