6results about How to "Granularity controllable" patented technology

The invention discloses a preparation method of a mattress with a negative ion sleep-aiding function, including the preparation of a negative ion release function stimulator, the preparation and modification of a negative ion emission function powder, and the compounding of the negative ion emission function powder with an adhesive and a stimulator: mixing waterborne polyurethane and the stimulator in a container, stirring evenly until they are completely dissolved, then adding negative ion emission nanopowder, stirring evenly, and preparing a negative ion emission compound solution; applying the negative ion emission compound solution to the surface of fabrics through a padding process, and processing the fabrics to prepare a functional mattress. The preparation technology of the negative ion function finishing agent provided by the invention solves the shortcomings of the prior art negative ion emission materials with low emissivity and low efficiency in improving environmental quality. Compared with the traditional preparation method, the cost is reduced, the operation is convenient, the particle size of the nanopowder is controllable, and the production efficiency is high.

The application discloses an alumina ceramic membrane sintering aid and a preparation method and application thereof, relates to the technical field of ceramic membranes, and the alumina ceramic membrane sintering aid is composed of nano silicon oxide and foamed powder, wherein the foamed powder comprises 20 parts of alumina powder, 50-80 parts of potassium feldspar, 5-20 parts of sodium feldspar, 0.1-1 part of sodium carboxymethyl cellulose, 0.1-1 part of sodium tripolyphosphate, 0.5-3 parts of sodium hexametaphosphate, 0.3-1 part of 1000-mesh manganese dioxide, 0.1-0.6 part of 1000-mesh silicon carbide and 100 parts of water. The alumina ceramic membrane sintering aid is controllable in particle size, and the temperature can be controlled when the alumina ceramic membrane sintering aid is applied to the preparation process of an alumina ceramic membrane support. In the preparation process of the alumina ceramic membrane support, the nano silicon dioxide in the sintering aid can adjust the viscosity of high-temperature liquid, accelerate the reaction between the sintering aid and the alumina powder, has a larger bridging effect, and the porous liquid at high temperature can guarantee the strength of the alumina ceramic membrane support and increase the porosity.

The invention discloses a koelreuteria paniculata leaf-shaped nickel selenide / vanadium selenide self-supporting composite electrode and a preparation method and application thereof.The preparation method comprises the steps that selenium powder serves as a selenium source, lauryl sodium sulfate and polyvinylpyrrolidone serve as morphology regulating agents, and a vanadium source and an alkali source are mixed to be uniform; a nickel-vanadium-based hydroxide precursor is synthesized on foamed nickel in situ by adopting a hydrothermal reaction method, then selenium powder is added into the precursor, and the integrated Ni3Se2 / V5Se8 / NF self-supporting composite electrode is prepared by adopting a pyrolysis method. On one hand, the oxidation-reduction process in the electrochemical reaction process is accelerated, and the adsorption energy barrier of a reaction intermediate is reduced, so that the catalytic performance of the material is improved; on the other hand, electron transfer in the electro-catalytic reaction process is improved, the catalytic activity is promoted to be improved, it is effectively guaranteed that strong interaction can be formed between the active material and the NF substrate, and the NF substrate shows good mechanical stability and deformation resistance in electrochemical application.

The utility model discloses a dry type fine sand grinding sand making machine. The speed reduction driving machine is installed on the mill support, the movable millstone is installed on the mill support and driven by the speed reduction driving machine to rotate, and the disc face of the movable millstone faces upwards; the top cover plate is arranged at the top of the mill support; the fixed millstone is installed on the top cover plate and located above the movable millstone; one end of the distance limiting pull rod is locked and connected to the fixed millstone, and the other end of the distance limiting pull rod penetrates through and is hung on the top cover plate; the disc pressing spring is located between the top cover plate and the fixed millstone and pushes and presses the fixed millstone downwards; the annular cavity type collecting hopper is arranged around the periphery of the movable millstone; and the feeding hopper is mounted on the top cover plate and is in butt joint with the feeding hole. The lower millstone is a movable millstone and cannot move in the axial direction; the upper millstone is a fixed millstone and can float up and down, and the lower limit position of the fixed millstone can be adjusted, so that the gap between the movable millstone and the fixed millstone is adjusted, the counter-acting force of the fixed millstone is presumed, and the granularity of a finished product is controllable.

This invention discloses a nickel-iron powder grinding and preparation apparatus, comprising a base on which a conveying system, a grinding system, and a dust collection system are mounted. The conveying system includes a hopper and a belt conveyor. The grinding system includes a weighing bin, a feed pipe assembly, a grinding assembly, a transmission device, and a cooling pipe assembly. The dust collection system includes a fan assembly, a centrifugal dust collector, and a bag filter dust collector. This invention enables highly efficient grinding of nickel-iron alloys.

The invention provides nano-porous rare earth silicate thermal insulation fibers synthesized by a coprecipitation method and a preparation method of the nano-porous rare earth silicate thermal insulation fibers. The fibers are prepared from the following components in parts by weight through a melt spinning process: 2-15 parts of nano-porous rare earth silicate and 85-98 parts of macromolecular polyester chips, wherein the chemical formula of the nanoscale porous rare earth silicate is (LaaCebYcSmd) 2Si2O7 (at) KH550, a, b, c and d are more than 0 and less than 1, and a + b + c + d = 1. The fabric woven by the fibers is light and thin in texture, low in heat conductivity coefficient and high in tensile strength, and has excellent heat insulation and heat preservation effects.