31 results about "Gallium trichloride" patented technology

The present invention is an apparatus for deliverying high purity gallium trichloride in the vapor phase to a gallium nitride reactor, comprising; a source of carrier gas at an elevated pressure; a purifier to remove moisture from the carrier gas; a heater capable of heating the carrier gas to at least 80° C.; a container having a supply of gallium trichloride, a valve controlled inlet for the carrier gas having a dip tube with an outlet below the level of the gallium trichloride, a valve controlled outlet for removing the carrier gas and entrained gallium trichloride; a heater capable of heating sufficient to melt the gallium trichloride; a delivery line connected to the valve controlled outlet for carrying the entrained gallium trichloride to a reaction zone for gallium nitride. A process is also described for the apparatus.

The present invention is related to the field of semiconductor processing equipment and methods and provides, in particular, methods and equipment for the sustained, high-volume production of Group III-V compound semiconductor material suitable for fabrication of optic and electronic components, for use as substrates for epitaxial deposition, for wafers and so forth. In preferred embodiments, these methods and equipment are optimized for producing Group III-N (nitrogen) compound semiconductor wafers and specifically for producing GaN wafers. Specifically, the precursor is provided at a mass flow of at least 50 g Group III element/hour for a time of at least 48 hours to facilitate high volume manufacture of the semiconductor material. Advantageously, the mass flow of the gaseous Group III precursor is controlled to deliver the desired amount.

The present invention is related to the field of semiconductor processing equipment and methods and provides, in particular, methods and equipment for the sustained, high-volume production of Group III-V compound semiconductor material suitable for fabrication of optic and electronic components, for use as substrates for epitaxial deposition, for wafers and so forth. In preferred embodiments, these methods are optimized for producing Group III-N (nitrogen) compound semiconductor wafers and specifically for producing GaN wafers. Specifically, the method includes reacting an amount of a gaseous Group III precursor as one reactant with an amount of a gaseous Group V component as another reactant in a reaction chamber under conditions sufficient to provide sustained high volume manufacture of the semiconductor material on one or more substrates, with the gaseous Group III precursor continuously provided at a mass flow of 50 g Group III element/hour for at least 48 hours. A system for conducting the method is also provided.

The invention provides a preparation method of gallium oxide hydroxide nano-crystals and belongs to the technical field of preparation of gallium oxide hydroxide nano-materials. According to the reaction kettle sealed heating alcoholysis method and the liquid-liquid interface reaction principle, through gradually dropwise adding methanol into a gallium oxide benzene solution disposed in an ultrasonic appliance and then enabling the mixed solution to be subjected to sealed low-temperature heating reaction, the prepared sample is white powders. The crystals in nano brush shape and which in smooth in surface, complete in shape and uniform in size are prepared under a preferable condition. According to the invention, the synthesis of gallium oxide hydroxide nano-crystals is carried out by using the alcoholysis reaction method for the first time, the disadvantage that the gallium oxide is very liable to absorb water and be decomposed by moisture is overcome, the operations are finished without adjusting pH (potential of hydrogen) and without using a vacuum condition, the reaction speed of the gallium oxide is significantly inhibited, so that the shape of the generated gallium oxide hydroxide is more easy to control. In addition, the product prepared by the method provided by the invention is high in yield and high in purity; and the preparation method is simple, excellent in repeatability and low in cost.

The invention discloses a preparation method of trimethyl gallium. The preparation method comprises the following steps of: adding a curafume gas into a mixture of metal magnesium and organic ether under the protection of an inert gas at the temperature of 30-100 DEG C and under the normal pressure to generate a methyl-magnesium-bromide solution; continuously stirring at the temperature of 50-100 DEG C for 2-3 hours, and lowering the temperature below 40 DEG C; adding an organic ether solution of absolute gallium trichloride or absolute gallium trichloride into the methyl-magnesium-bromide solution at the temperature of 30-100 DEG C and under the normal pressure, reacting, and continually stirring a reactant for 3-5 hours after reacting; heating a reaction kettle under the normal pressure to 130-190 DEG C, distilling a crude trimethyl gallium product out, and controlling the receiving temperature at 56-62 DEG C; and rectifying the crude product once again under the normal pressure to obtain pure trimethyl gallium, wherein the product collecting temperature is 56 DEG C. The method has the advantages of difficulty in introducing impurities, low cost, high reaction efficiency, high safety, easiness of recovering solvents from produced waste and environment friendliness.

The invention relates to a method for preparing and comprehensively utilizing aluminum oxide by pelletizing, chloridizing and electrolyzing bauxite. The method comprises the following steps: mixing bauxite, a carbon source and kaolin at a ratio; adding a binder and water, pelletizing and airing; chloridizing, separating and purifying, thereby obtaining anhydrous aluminum chloride, anhydrous ferric chloride, silicon tetrachloride, titanium tetrachloride, scandium chloride and gallium trichloride; converting anhydrous aluminum chloride and anhydrous ferric chloride into a corresponding chloride solution; controlling voltage and current density to electrolyze, thereby obtaining aluminum hydroxide, ferric hydroxide, hydrogen and chlorine; returning the chlorine to a chloridizing section; roasting aluminum hydroxide, thereby obtaining metallurgical/chemical aluminum oxide; roasting ferric hydroxide, thereby obtaining iron oxide red or other iron-containing products; purifying silicon tetrachloride; refining titanium tetrachloride, thereby obtaining a titanium sponge raw material; and enriching scandium chloride to serve as a scandium raw material. The method provided by the invention is low in cost, the raw materials are low-cost and are easily obtained, the complete chlorination is realized through pelletizing and chloridizing, the operation process is simple, the degree of automation is high, the product purity is high, and the raw materials, such as, chlorine and zinc, can be reused.

The invention discloses a preparation method for a powder metallurgy antifriction bearing. The preparation method comprises the step that 60-65 parts of titanium powder, 15-20 parts of magnesium powder, 10-15 parts of molybdenum disulfide, 10-20 parts of silicon carbide, 3-11 parts of gallium trichloride, 10-15 parts of magnesite powder, 2-8 parts of nanometer silicon nitride, 1-6 parts of hafnium boride, 6-8 parts of phenolic resin, 6-7 parts of cadmium selenide and 12-16 parts of auxiliaries are weighed by weight, wherein the auxiliaries are made of flax seed oil, pentaerythritol triacrylate and polydimethylsiloxane by weight of 3: 5: 6. The powder metallurgy antifriction bearing obtained through the preparation method has higher strength, hardness, abrasion resistance and corrosion resistance than like products on the market, and the service life of alloy parts is prolonged; and raw materials are easy to obtain, the processing cost is low, the preparation technology is simple, parameters are easy to control, the production process is safe and environment-friendly, and the powder metallurgy antifriction bearing is suitable for large-scale industrialized production.

The invention relates to a process for preparing trialkylgallium compounds of the general formula R₃Ga. The process is based on the reaction of gallium trichloride (GaCh), optionally in a mixture with partially alkylated products, with an alkylaluminium compound of the type R_aAlCl_b (where R═C₁-C₅-alkyl, a=1, 2 or 3, b=0, 1 or 2 and a+b=3) in the presence of at least two alkali metal halides (e.g. NaCl and KCl) as auxiliary base. Preference is given to using alkylaluminium sesquichloride (R₃Al₂Cl₃) or trialkylaluminium (R₃Al). The reaction mixture is heated to a temperature in the range from 120° C. to 250° C. and the trialkylgallium compound formed is separated off via a separator which is operated at a temperature which is more than 30° C. below the boiling point of the most volatile partially alkylated product. Complete alkylation is achieved here and partially alkylated products are recirculated to the reaction mixture. In a further step, the reaction mixture can be heated to a maximum of 350° C. and the remaining fully alkylated and partially alkylated products can be separated off. The process provides a high yield of trialkylgallium compound and displays high gallium utilization; the products are used, e.g., as precursors for MOCVD processes.

The invention discloses a preparation method of gallium chloride, wherein the preparation method comprises the steps: adding anhydrous ammonium chloride and gallium which are used as reaction raw materials into a reaction kettle, wherein the molar ratio of anhydrous ammonium chloride to gallium is more than 3:1; raising the temperature of the reaction kettle to 320-500 DEG C, decomposing ammonium chloride into ammonia gas and hydrogen chloride, and reacting the hydrogen chloride with metal gallium to generate gaseous gallium chloride; cooling the reaction kettle, recrystallizing ammonium chloride obtained by reaction of ammonia gas and residual hydrogen chloride to generate solid ammonium chloride, separating out the solid ammonium chloride, and keeping gallium chloride in a gaseous state; replacing gas in the reaction kettle with protective gas and storing the gas in a sealed container; and cooling the gaseous gallium chloride in the sealed container to obtain a gallium chloride solid product. Anhydrous ammonium chloride and gallium are used as raw materials, gaseous gallium chloride is generated from hydrogen chloride and gallium obtained by ammonium chloride decomposition through heating, and the gaseous gallium chloride is packaged and stored after being cooled, crystallized and separated, so that the cost of synthesizing gallium trichloride is remarkably reduced, and the potential safety hazard problem existing in gas synthesis is avoided.

The invention discloses a device and a method for preparing gallium chloride. The device comprises a reaction kettle, a surge flask and a sealed container. The reaction kettle is provided with a feed port, a first shielding gas inlet and a discharge port. The surge flask is provided with openings in both ends, the opening in one end is connected to the discharge port of the reaction kettle through a pipeline, and the opening in the other end is connected to the sealed container through a pipeline. The sealed container is provided with a second shielding gas inlet and a communication port connected with the opening in the other end of the surge flask. Anhydrous ammonium chloride and gallium are used as raw materials, gaseous gallium chloride is generated from hydrogen chloride and gallium obtained by ammonium chloride decomposition through heating, and the gaseous gallium chloride is packaged and stored after being cooled, crystallized and separated, so that the cost of synthesizing gallium trichloride is remarkably reduced, and the potential safety hazard problem existing in gas synthesis is avoided.

The invention provides a saturated solution for preparing an electrothermal film. The saturated solution is formed by tin tetrachloride, titanium tetrachloride, cobaltic chloride, gallium trichlorideand ethylene glycol. The mass percentage of the tin tetrachloride in the saturated solution is 30%-40%; the mass percentage of the titanium tetrachloride in the saturated solution is 10%-20%; the masspercentage of the cobaltic chloride in the saturated solution is 10%-20%; the mass percentage of the gallium trichloride in the saturated solution is 10%-20%; and the mass percentage of the ethyleneglycol in the saturated solution is 20%-30%. The invention also provides a preparation method of the saturated solution. The preparation process of the saturated solution is simple; and the prepared electrothermal film is high in heat energy conversion efficiency, uniform in heating, long in service life and low in cost.

The invention discloses an electrolyte salt of a lithium/thionyl chloride battery and a preparation method thereof, and the electrolyte salt is characterized in that the electrolyte salt is synthetic lithium tetrachlorogallate (LiGaCl4), and the molar concentration range of the lithium tetrachlorogallate in the electrolyte is 0.5 mol/L to 1.5 mol/L. The lithium tetrachlorogallate is synthesized by fusing anhydrous lithium chloride (LiCl) and anhydrous gallium trichloride (GaCl3) in a dry reaction vessel. The anhydrous lithium chloride and the anhydrous gallium trichloride require drying treatment.

The invention relates to the technical field of gallium trichloride synthesis and discloses a preparation method of gallium trichloride granules. The preparation method includes the steps of: 1) moving gallium trichloride in a glove box, controlling the contents of water and oxygen in the glove box to be lower than 5 ppm, and increasing the temperature to melt the gallium trichloride; 2) adding the molten gallium trichloride dropwisely in liquid nitrogen in the glove box; 3) solidifying the molten gallium trichloride to obtain spherical or spherical-like gallium trichloride granules. The preparation method is simple in process steps, employs low-cost and easy-to-obtain raw materials, is free of introduction of impurities and can prepare regular spherical granules. These regular spherical granules have strong flowability, are not adhered on wall of a container, are very easy to move and apply, and are very easy to control in addition amount.

The invention provides a novel method for preparing Keggin-GaAl12 chloride single crystal and polycrystalline powder, and belongs to the technical field of inorganic high polymer synthesis. The inorganic polymer cluster MeAl12 ([MeO4Al12(OH)24(H2O)12]7+, Me=Al and Ga) with thirteen metal cores is a typical Keggin type polycation, and occupies an important position in modern material chemistry. However, Keggin- MeAl12 (Me = Al and Ga) chloride crystals are not obtained. In the method, a spontaneous hydrolysis product polyaluminum chloride PAC solid is dissolved in a methanol solvent, a galliumchloride solid is dissolved in the solution, and slow crystallization is performed at room temperature to precipitate the Keggin-GaAl12 chloride crystal. The obtained single crystal particles are confirmed to have a Keggin type structure by X-ray single crystal diffraction analysis.

The invention discloses a trimethylchloroethylamine-containing multipolar axis plastic ferroelectric and piezoelectric material as well as preparation and application thereof, which relates to ferroelectric and piezoelectric materials. The chemical formula of the trimethylchloroethylamine-containingmultipolar axis plastic ferroelectric and piezoelectric material is [(CH3)3NCH2Cl]GaCl4. The preparation method comprises the following steps of mixing trimethylchloroethyl ammonium chloride with a solvent, then adding gallium trichloride, stirring, volatilizing and growing a clear solution obtained by filtering, and standing to obtain the trimethylchloroethylamine-containing multipolar axis plastic ferroelectric and piezoelectric material, namely [(CH3)3NCH2Cl]GaCl4. A polycrystalline tabletting sample of the obtained multipolar axis plastic ferroelectric and piezoelectric material at room temperature has excellent piezoelectric property. The trimethylchloroethylamine-containing multipolar axis plastic ferroelectric and piezoelectric material can be applied to preparation of ferroelectric storage materials, signal sensing materials, energy collection materials and the like.