8results about How to "Physical stability" patented technology

The utility model relates to the technical field of silicon powder heating, specifically relates to a heating device for powder purification of direct pulling method, including heating block, the lower part of heating block is provided with the footboard, the footboard is connected with heating block through the connecting device, the connecting device includes the connecting hole of setting at the top of footboard, the bottom of connecting hole is provided with the plug pipe, a plurality of expansion joints are provided on the pipe body of plug pipe, improve the fixed effect of connection, guarantee the safe use, prolong the life, reduce the production cost.

The application discloses a kind of post-treatment process of lubricating rust-proof steel wire, belong to steel wire surface treatment technical field, the post-treatment process includes the following steps: steel wire is immersed in the coating liquid with temperature 70-80 ℃ soaking, after taking out, it is first dried in 50-60 ℃ temperature, then room temperature natural air drying;The coating liquid includes according to weight parts: modified MoS2 particle 3-6 parts, methyl cellulose 0.5-1 part, zinc dihydrogen phosphate 1.5-3 parts, boric acid 0.5-1.5 parts, WPU-SS dispersion 3-5 parts, alkyl polyoxyethylene ether phosphate ester salt 5-10 parts, methyl hydroxyl stearate 2-4 parts and benzotriazole 0.3-0.8 part.The application in the paper solves the problem of insufficient lubricity and rust resistance of steel wire surface by using self-made coating liquid.Provides a firm protective barrier for steel wire.

The invention relates to the technical field of ceramics, and discloses a method for producing a ceramic product with an anti-counterfeiting function by using a high-temperature-resistant upconversion material, the high-temperature-resistant upconversion material is added into an underglaze color material, and the addition amount is 3-5wt% of the total weight of the underglaze color material; drawing a pattern on a ceramic body by adopting the underglaze color material; applying transparent glaze; sintering at the temperature of 1100 to 1320 DEG C; or coating the slurry A on the surface of the ceramic body; locally covering the slurry B; sintering at the temperature of 690 to 820 DEG C; the slurry A comprises lead-free glass powder and a blender; the slurry B comprises a decorative pigment, a blender and a high-temperature-resistant upconversion material; the addition amount of the high-temperature-resistant upconversion material is 1-5wt% of the total weight of the slurry B; wherein the high-temperature-resistant up-conversion material is YSZ: x mol% of Er < 3 + > and y mol% of Yb < 3 + >; 0 < x < = 6, and 0 < y < = 20. The high-temperature-resistant up-conversion material disclosed by the invention still has efficient luminescence performance after being subjected to secondary high-temperature sintering, and has a wide application prospect in the technical field of ceramic tracing and authentic identification.

This invention discloses carbon-based silica composite materials, high-impact, low-VOC resin composite materials, their preparation methods, and applications. The carbon-based silica composite material of this invention is a carbon-based silica composite material with silica loaded on the surface of activated carbon fibers. After in-situ synthesis of silica on a carbon source matrix, the composite material is obtained through high-temperature carbonization. This invention utilizes carbon and silicon sources as raw materials to synthesize, in-situ, a mixture containing carbon source and SiO2 in a liquid-phase system. 2 The composite material was then subjected to hydrothermal carbonization to prepare a material containing SiO2. 2 The composite component is composed of activated carbon fiber. The carbon-based silica composite material prepared by this invention has a high specific surface area and excellent adsorption performance. When added to resin as a filler, it can significantly improve the VOC release of the material and at the same time improve the impact resistance of the resin material.

The utility model discloses a high-strength durable slag line brick for a steel ladle, which relates to the technical field of slag line bricks and comprises a slag line brick body, four corners of the outer wall of the slag line brick body are arc corners, and a plurality of radial reinforcing ribs uniformly extend to the periphery along the radial direction of the outer wall of a support rib to reach an anti-oxidation coating. According to the utility model, the metal ceramic honeycomb-shaped supporting framework is arranged in the chamfered square hole and is integrally sintered with the hole wall to construct a high-strength and high-stability three-dimensional bearing network structure, so that the compressive strength of the slag line brick is remarkably enhanced, the slag line brick can bear a harsh working environment, and the service life of the slag line brick is prolonged. According to the slag line brick provided by the invention, the radial reinforcing ribs are arranged on the surface of the slag line brick, and are matched with a dual-protection mechanism of the porous reinforcing body and the anti-oxidation coating, so that the permeation of slag is effectively blocked, all-directional protection is provided for the slag line brick, and in addition, the radial reinforcing ribs further disperse stress concentration, avoid structural damage caused by overlarge local stress and prolong the service life of the slag line brick. Therefore, the overall durability and reliability of the slag line brick are greatly improved.

The invention relates to the technical field of environment detection, in particular to environment detection-based automatic preparation equipment for a soil sample to be detected, which comprises a preparation tank, a driving mechanism, a grinding mechanism and a screening mechanism, and four discharging pipes are fixedly mounted on one sides of the bottoms of the four spiral conveying assemblies correspondingly, and the driving mechanism is in transmission connection with the spiral conveying assemblies, the discharging pipes, the grinding mechanism, the screening mechanism and the grinding rollers. Through the water-cooling heat absorption effect of the water-cooling grinding table, heat generated when the grinding roller grinds a soil sample is absorbed in time; and meanwhile, the intermittent rotating assembly intermittently rotates by driving the rotating isolation frame, the water cooling cavity which absorbs heat and the water cooling cavity which does not absorb heat can be effectively replaced, the water cooling cavity under the grinding roller is kept in an efficient heat exchange state all the time, stable grinding temperature control is achieved, and volatilization of chemical substances and loss of samples are reduced.

The application discloses the technical field of high polymer synthesis and functional material modification, and relates to a preparation method of low-molecular-weight polyacrylamide. The method comprises the following steps: firstly, preparing a double-metal doped multi-level pore carbon nanotube-covalent organic framework composite modification material, and the preparation process comprises the following steps: surface functionalization of multi-walled carbon nanotubes, growth of a covalent organic framework layer, doping of double-metal ions, and subsequent reduction and calcination treatment; then, adding deionized water, acrylamide and the modification material into a three-necked flask, stirring under nitrogen to dissolve the acrylamide, preparing an oxidation-reduction initiator solution, and dropping the initiator solution into the system under the protection of nitrogen, and polymerization reaction is carried out in a constant-temperature water bath at 19-21 DEG C. After the polymerization is completed, the product system is washed, filtered, and finally, low-molecular-weight polyacrylamide is obtained by using a vacuum freeze-drying method. The polyacrylamide prepared by the method has low and controllable molecular weight, and has good solubility and salt resistance.

This utility model relates to the field of ceramic fiber heat-resistant board technology, and more particularly to an environmentally friendly ceramic fiber heat-resistant board, comprising a fiber matrix layer, a ceramic fiber board, a reinforcing layer, a ceramic fiber felt, and a surface coating. The fiber matrix layer includes an intermediate layer, with an upper surface layer and a lower surface layer fixedly connected to the upper and lower surfaces of the intermediate layer, respectively. The reinforcing layer, ceramic fiber felt, and ceramic fiber board are sequentially fixedly connected to the upper and lower ends of the fiber matrix layer. The surface coating is applied to the surface of the ceramic fiber board. The reinforcing layer includes a surrounding panel, with mortises on all four inner walls of the surrounding panel, into which tenons are engaged. Transverse reinforcing rods are fixedly connected between corresponding tenons on the left and right sides of the surrounding panel, and longitudinal reinforcing rods are fixedly connected between corresponding tenons on the front and rear sides of the surrounding panel. The unique design of the reinforcing layer of this utility model greatly enhances the overall strength of the board, reduces the risk of deformation and damage, improves the toughness of the board, and effectively blocks heat transfer, meeting the environmental protection requirements of modern society.