11 results about "Trifluoride" patented technology

The invention belongs to the technical field of special ceramic preparation, and particularly relates to high-strength special ceramic and a preparation method thereof. The high-strength special ceramic is prepared from the following raw materials: alumina powder, quartz powder, serpentine, phosphorus slag, eucryptite, barium borate, nano yttrium trifluoride, nano hafnium boride, nano strontium zirconate, nano lanthanum titanate and polyborosilazane. According to the high-strength special ceramic disclosed by the invention, the aluminum oxide powder, the quartz powder, the serpentine and the phosphorus slag are taken as matrix raw materials, eucryptite, barium borate and yttrium trifluoride are taken as fluxing agents, and nano hafnium boride, nano strontium zirconate, nano lanthanum titanate and polyborosilazane are taken as fillers, so that the prepared special ceramic has excellent bending strength and fracture toughness.

The object of the present invention is to provide a fluoride compound remover that can remove fluorine compounds, particularly phosphoric acid trifluoride (PF3), from exhaust gas. [Solution] The above problem is solved by a fluoride compound remover that contains 60-98% by weight of manganese (Mn) calculated as MnO and 0.5-20% by weight of alkali metals calculated as oxides, and does not contain calcium (Ca).

The invention belongs to the technical field of concrete, and particularly relates to basalt fiber composite modified sprayed concrete and a preparation method thereof. The basalt fiber composite modified sprayed concrete is prepared from the following raw materials in parts by weight: 420 to 470 parts of cement, 200 to 220 parts of water, 830 to 860 parts of sand, 840 to 880 parts of gravel, 40 to 60 parts of admixture, 15 to 30 parts of modified basalt fiber, 2 to 6 parts of polycarboxylate superplasticizer and 5 to 12 parts of alkali-free accelerator. The modified basalt fiber is added into the sprayed concrete to serve as a reinforcing phase, the strength and impact toughness of the concrete can be improved, and the later strength of the concrete is guaranteed. The cerium trifluoride modified fly ash is added into the admixture, so that the rebound rate can be reduced, and the early strength of the concrete is improved.

The application provides a solid-state electrolyte interface protection layer, a preparation method and a solid-state battery, and relates to the technical field of solid-state batteries.The preparation method of the solid-state electrolyte interface protection layer provided by the application comprises the following steps: a mixed suspension with vanadium trifluoride nanoparticles is sprayed on the surface of a solid-state electrolyte substrate and deposited, and then, under the action of a low-energy electron beam in a vacuum environment, the interface protection layer is in-situ solidified.The application can improve the interface compatibility between the solid-state electrolyte and the electrode interface, effectively relieve the cyclic mechanical stress generated by the electrode material in the cycle process, and improve the performance and cycle life of the solid-state battery.

A Ramjet solid fuel comprising up to 50% metal by weight selected from the group consisting of aluminum, boron, boron carbide, magnesium, titanium, and titanium boride; between 2.0 and 9.0 weight percent fluorinated combustion aids selected from the group consisting of 3-hydroxybenzo trifluoride (3HBTF), hydroxyfluoro-2-propanol (HF2P), polytetrafluoroethylene, and trifluoroethanol (TFE); and up to 48% by weight of the remaining component being a hydroxyl terminated, epoxidized polybutadiene polymer (Poly BD 605E) (HO—CH2-CH═CH—CH2-CH2-CH—O—CH—CH2-CH2-CH—(CH═CH2)-CH2-CH═CH—CH2-CH2-CH—O—CH—CH2-OH).

The method for preparing phosphorous trifluoride according to the present invention comprises the steps of: controlling the particle size (D50) of NaF to 67 μm to 137 μm; and reacting the particle size-controlled NaF, PCl3, and a solvent to prepare phosphorus trifluoride. By maximizing reactivity through control of the NaF particle size, the conversion rate of NaF can be increased, thereby suppressing the generation of unreacted NaF. Further, the selectivity for phosphorus trifluoride is excellent, and the preparation cost can be reduced.

The invention discloses a multilayer film with Faraday rotation and anti-reflection functions and a preparation method thereof, and belongs to the technical field of magneto-optical devices. Tantalum pentoxide (Ta2O5) and cerium trifluoride (CeF3) are adopted as high and low refractive index film layer materials of the multilayer film, an eight-layer film structure is formed by alternate deposition on a silicon dioxide glass substrate, the structure design is (0.25 H < 0.25 > L < 0.25 > H < 0.25 > L < 0.25 > H < 0.25 > L < 0.25 > H < 0.25 > L), the thickness of each layer is lambda / 4n, and lambda is reference wavelength 1064nm; the multilayer film is prepared through a physical vapor deposition process by selecting an electron beam evaporator and combining specific parameter combination, firstly, SiO2 glass is cleaned with absolute ethyl alcohol and pure water, and then pre-melted CeF3 and Ta2O5 film materials and the SiO2 glass are placed in the electron beam evaporator to be subjected to multilayer film deposition to obtain the multilayer film.

This invention relates to a method for preparing manganese trifluoride catalyst and its application, belonging to the field of chemical technology. The method includes the following steps: S1, adding manganese powder to a reactor and preheating the reactor; S2, adding nitrogen trifluoride to the reactor and maintaining the reactor temperature until the reaction is complete; S3, the manganese powder and nitrogen trifluoride react to generate manganese trifluoride and nitrogen gas. After the reaction is complete, excess fluorine gas and the nitrogen gas produced in the reaction are removed for tail gas treatment, and the product manganese trifluoride is collected; S4, the prepared manganese trifluoride is added to an octafluoropropane synthesis reactor for use as a catalyst. This invention utilizes the decomposition of nitrogen trifluoride at a certain temperature to generate free fluoride ions, which react completely with manganese powder to generate manganese trifluoride. The reaction process is stable and can achieve continuous industrial production. The conversion rate of octafluoropropane synthesis can be effectively improved through the catalysis of manganese trifluoride.

The invention provides a method for preparing indium trifluoride in a continuous gas phase, which comprises the following steps of: performing atomization, sublimation or fluidization pretreatment on an indium source in an inert carrier gas atmosphere to form a gaseous or superfine particle indium source material flow; continuously introducing the indium source material flow and fluorine-containing gas into a continuous reactor with a function of mechanically updating a reaction interface, and carrying out gas-phase fluorination reaction at the reaction temperature of 500-900 DEG C to generate a gas-solid mixture containing indium trifluoride solid and tail gas; wherein the feeding molar ratio of an indium element in the indium source to a fluorine element in the fluorine-containing gas is 1: (3.0-6.5); and performing continuous gas-solid separation on the gas-solid mixture obtained in the step S2. Through specific reactor selection and process parameter coupling, the preparation difficulties that the efficiency is low, the energy consumption is high, the product consistency is poor and the metal indium is easy to sinter and coat when the indium trifluoride is prepared by an existing intermittent method are overcome, the safe and continuous production of the indium trifluoride is realized, and the product purity reaches the electronic grade standard.

The invention particularly relates to a nitrogen trifluoride raw material electrolyte preparation device and method.The device comprises an HF storage tank, an ammonia conveying unit, an electrolyte preparation unit and an electrolyte storage tank, the HF storage tank and the ammonia conveying unit communicate with the electrolyte preparation unit through pipelines, and the electrolyte preparation unit communicates with the electrolyte storage unit through a pipeline; the ammonia gas conveying unit comprises a liquid ammonia storage tank, a liquid ammonia conveying pump, an ammonia vaporizer and an adsorption tower which are sequentially communicated along the material flow direction; and the electrolyte preparation unit comprises a mixing reaction kettle and an electrolyte heat exchanger. According to the method, liquid hydrogen fluoride and liquid ammonia are pumped from a storage tank to a mixing reaction kettle, hydrogen fluoride reacts with ammonia gas to generate a molten electrolyte of NH4HF2 and HF, the electrolyte is conveyed through a circulating pump after the reaction, one part of the electrolyte is stored in an electrolyte storage tank, and the other part of the electrolyte is cooled by a heat exchanger and then returns to the reaction kettle to maintain the temperature stable. The method has the advantages of energy conservation, high product purity, high yield and the like.

The invention discloses a preparation method of m-nitrobenzotrifluoride based on a supercritical / subcritical technology, and the disclosed scheme is as follows: benzotrifluoride and a nitrating agent are mixed in a supercritical / subcritical fluid environment for nitration reaction to generate a trifluoromethyl nitrobenzene product. According to the method disclosed by the invention, the nitration process is enhanced by utilizing the supercritical / subcritical fluid, the mass and heat transfer efficiency is high, the raw material trifluorotoluene is nearly completely converted, the selectivity of the product m-nitro trifluorotoluene is high, meanwhile, the acid consumption in the nitration process is greatly reduced, and the technical process is more environment-friendly and efficient.