5 results about "Ammonium borate" patented technology

The application relates to a three-dimensional hollow network structure boron nitride, and a main process of a preparation method thereof is as follows: taking citric acid, sodium borate and strontium carbonate as raw materials, a boron-containing precursor is obtained through a sol-gel method; then, the boron-containing precursor is pre-nitridated under a nitrogen-containing atmosphere to obtain a pre-nitridation product; next, the pre-nitridation product is uniformly mixed with ammonium borate and ammonium chloride through ball milling, and then is placed into a high-pressure reaction kettle to react, so that the three-dimensional hollow network structure boron nitride is obtained. The three-dimensional hollow network structure boron nitride prepared by the application has a connected network structure formed by multiple cavity units, has high purity, provides a new idea for preparation of a hollow boron nitride structure, and has a good application prospect in the fields of gas adsorption, water pollution treatment, hydrogen storage and a drug carrier.

This invention discloses a method for large-size ammonium fluoroborate single crystal vapor phase growth, comprising the following steps: weighing two or more compounds containing NH4, B, O, and F as raw materials in a stoichiometric ratio of 1:4:6:1, mixing them thoroughly, adding a transport agent to obtain an initial mixture, and loading the initial mixture into a crystallization vessel; during the crystal growth stage, seed crystals or suspended seed crystals are selected by geometric selection and temperature screening among the grains; the crystallization vessel is dynamically heated within the temperature gradient zone of a vertical tube furnace, the dynamic heating being achieved by independently raising or lowering the temperatures of the high-temperature and low-temperature zones to dynamically control the temperature gradient of the crystal growth zone, so as to match it with the temperature gradient required at each stage of the crystal growth process; the raw materials crystallize in the crystal growth zone under the transport agent, resulting in large-size ammonium fluoroborate crystals. This invention produces large-size single crystals, is simple to operate, and highly practical, representing a superior ammonium fluoroborate single crystal growth process.

This invention discloses a high-strength corrosion-resistant pipeline steel component and its preparation method, relating to the field of steel material technology. The high-strength corrosion-resistant pipeline steel component prepared by this invention comprises, from the inside out, a pipeline steel component base layer and an anti-corrosion layer. The high-strength corrosion-resistant pipeline steel component is prepared by first pre-treating the pipeline steel component base layer with a temperature rise, then applying tension to the pre-treated base layer using a tensioner, followed by coating the outer surface of the pre-treated base layer with an anti-corrosion material, and then continuing to heat and cool under a nitrogen-containing gas atmosphere. The pipeline steel component base layer, by mass fraction, comprises the following components: 0.09–0.11% C, 11–14% Cr, 0.4–1% Si, 0–0.03% S, 0–0.03% P, 0.03–0.08% Ti, with the remainder being Fe. The anti-corrosion material includes ammonium borate, polyacrylonitrile, aluminum oxalate, and ammonium polyvanadate. The high-strength corrosion-resistant pipeline steel component prepared by this invention exhibits high strength and good corrosion resistance.

The application relates to the technical field of semiconductor manufacturing, in particular to a water-soluble protective film and a preparation method and application thereof; the water-soluble protective film is prepared from raw materials comprising the following components: 2wt%-8wt% of a film forming agent; 0.05wt%-0.5wt% of a fluoride removing agent; 0.05wt%-0.5wt% of a buffer; and the balance of a solvent; the fluoride removing agent comprises ammonium tetraborate and / or ammonium gluconate. Compared with the prior art, the water-soluble protective film is prepared from raw materials comprising specific components, the components realize good mutual interaction under specific proportioning conditions, the water-soluble protective film can complex and absorb Al surface F ‑ under certain conditions, and can physically isolate water vapor, so that corrosion of the Al surface is effectively avoided; meanwhile, the water-soluble protective film is soluble in water and can be removed through water washing operation, the operation is simple, and the cost is low.

The application provides an outdoor intumescent steel structure fireproof coating and a preparation method thereof, and relates to the field of fireproof coatings.The fireproof coating comprises a matrix and a curing agent, and the matrix raw materials are bisphenol A type epoxy resin, low-viscosity aromatic epoxy resin, aerogel, ammonium polyphosphate, ammonium pentaborate, pretreated expanded graphite, composite filler, polyamide wax, dispersant and reactive diluent; and the curing agent raw materials are polyamide resin, low-viscosity aromatic epoxy resin, reactive diluent, melamine, carbon black powder, glass fiber, hydrogenated castor oil and attapulgite.The fireproof coating can form a uniform and stable coating layer, has strong adhesion to the steel structure, is resistant to high temperature and humid heat, effectively avoids problems such as peeling, bulging and cracking during use, and has excellent freeze-thaw resistance, acid resistance, alkali resistance, salt mist resistance and ultraviolet radiation resistance, so that the fireproof performance of the coating does not attenuate during long-term outdoor use, and the service life of the coating is effectively prolonged.