8 results about "Magnesium sulfide" patented technology

The invention belongs to the field of preparation of high-end carbon materials, and relates to a method for desulfurizing high-sulfur petroleum coke. The core of the invention is to construct a'desulfurization-acidification-regeneration 'three-step closed cycle system. The system takes magnesium oxide as a circulating medium, firstly magnesium oxide reacts with sulfur in petroleum coke at a high temperature to be converted into magnesium sulfide, then sulfur is released and recovered through an acidification step, meanwhile magnesium is converted into an intermediate product magnesium hydroxide, and finally, the magnesium medium is recovered to be active through a thermal regeneration step, magnesium oxide is obtained, and circulation is completed.

The invention discloses an outdoor magnesium oxysulfate fireproof plate and a preparation method thereof, and belongs to the technical field of light building materials, and the preparation method comprises the steps of filler pretreatment, cement paste preparation, filling reinforcement, molding pouring and segmented maintenance. According to the invention, the recycled foamed ceramic leftover material is used as a core filler, so that the problem of treatment of foamed ceramic processing waste is effectively solved, and the environmental pressure caused by industrial solid waste accumulation is reduced. Meanwhile, part of traditional filler is replaced with waste, the raw material cost for preparing the fireproof plate is greatly reduced, the dual benefits of environmental protection, waste reduction and cost optimization are achieved, and the development trend of green building materials is met.

The invention belongs to the technical field of electrochemical energy storage batteries, and particularly relates to a chlorine-free simple magnesium salt electrolyte for a magnesium-sulfur battery as well as a preparation method and application of the chlorine-free simple magnesium salt electrolyte. The electrolyte comprises magnesium salt, ionic liquid, an organic ether solvent, an amine solvent and an organic phosphide additive. The solvation structure is regulated and controlled through the synergistic effect of multiple components, the compatibility of the electrolyte with the sulfur positive electrode and the magnesium negative electrode is improved, and the electrochemical performance of the magnesium-sulfur battery is improved. Specifically, the amine solvent is used as a strong polar solvent to improve the solubility of the magnesium polysulfide, so that the diffusion and redox conversion kinetics of the magnesium polysulfide are promoted, and the organic phosphide is used as an additive to effectively improve the specific discharge capacity and voltage platform of the magnesium-sulfur battery. Meanwhile, due to the addition of the ionic liquid, the stability of a magnesium negative electrode / electrolyte interface is improved, the transmission capacity of Mg < 2 + > is enhanced, and the overpotential of magnesium deposition / dissolution is reduced. In addition, the electrolyte does not contain chloride ions, so that the corrosion problem caused by the chloride ions is avoided.

The application belongs to the field of batteries, and particularly relates to a modified lithium-rich lithium iron phosphate lithium supplement agent, a preparation method and application thereof, a lithium-supplemented positive electrode and a lithium ion battery, wherein the modified lithium-rich lithium iron phosphate lithium supplement agent comprises a core and a shell coated on the surface of the core, the core is lithium-rich lithium iron phosphate, and the shell comprises an oxygen scavenger, porous carbon and a fast ion conductor; the oxygen scavenger comprises at least one of potassium sulfide, zirconium disulfide, di-aluminum sulfide, cuprous sulfide and magnesium sulfide. The application provides a new material in which the lithium-rich lithium iron phosphate is coated with a shell of a synergistic composite material of an oxygen scavenger, porous carbon and a fast ion conductor, and based on the combination of the shell synergistic components and the core-shell structure, the problems of gas generation and poor air stability of the lithium-rich lithium iron phosphate can be solved from the root cause, and the first efficiency and long cycle stability of the battery assembled from the material can be effectively improved.

The application discloses a preparation method of magnesium sulfide / MXene composite material, and products and applications thereof. Lithium halide is added into strong acid to dissolve Ti3AlC2 powder, and the treated Ti3AlC2 powder is collected when the pH value is 6 after washing, centrifugation, vacuum drying, ultrasonic bath and centrifugation. The green supernatant is collected to obtain a layered MXene colloidal suspension. The MXene dispersion liquid and oleylamine are stirred to form an emulsion. The mixed dispersion is heated to form Mg-O-X / MXene. A solution containing thioacetamide in oleylamine is injected into the three-necked bottle. After heating, stirring, cooling, washing, centrifugation and freeze drying, the magnesium sulfide / MXene composite material is obtained. The first discharge specific capacity of the magnesium sulfide / MXene composite material is 199.7 mAh / g at a current density of 500 mA / g, and the discharge specific capacity is 187 mAh / g after 50 cycles, and the capacity retention rate is 93.6%.

The application discloses a sound insulation bamboo powder magnesium oxysulfate cement composite material and a preparation method, and belongs to the technical field of building materials. The composite material takes magnesium oxysulfate cement as a matrix, and is mixed with alkali-treated bamboo powder and rubber powder as functional components. By alkali treatment of the bamboo powder, more active hydroxyl groups are exposed on the surface of the bamboo powder, the chemical bonding force between the bamboo powder and the cement matrix is enhanced, the interface compatibility is improved, the bamboo powder surface is roughened, and then a mechanical interlocking structure is formed with the rubber powder, and the uniform dispersion and synergistic effect of the two in the cement are promoted. On the basis of improving the mechanical properties of the composite material, the porous sound wave absorption characteristics of the alkali-treated bamboo powder and the viscoelastic damping effect of the rubber powder are utilized to construct a multi-scale sound wave dissipation system, so that the sound insulation performance of the material in the full frequency range is optimized.

A magnesium oxychloride cement having improved strength retention in humid conditions and durability tests, the cement comprising: a hydrated magnesium oxychloride cement, a hydrated magnesium oxysulfate cement, a phosphate binder, and a hydrated magnesium silicate cement, the magnesium silicate cement comprising magnesium oxide and silica fume.

The present application relates to the technical field of flame-retardant materials, and particularly relates to a preparation method of low-hygroscopic flame-retardant plywood and the prepared plywood. The preparation method of low-hygroscopic flame-retardant plywood comprises the following steps: S1, providing a plywood as a base material plate; S2, coating magnesium sulfide oxide adhesive on two surfaces of the base material plate to obtain a sizing base material plate; S3, providing two veneers; S4, assembling the veneers in the order of veneer-sizing base material plate-veneer to obtain a board blank of low-hygroscopic flame-retardant plywood; and S5, cold pressing and hot pressing the board blank in sequence to obtain the low-hygroscopic flame-retardant plywood. The low-hygroscopic flame-retardant plywood is prepared by using the magnesium sulfide oxide flame-retardant adhesive, the problem of moisture absorption and corrosion of metal connecting parts existing in the traditional wet-process flame-retardant plywood is solved, and the low-hygroscopic flame-retardant plywood can be used only in the facing layer of the flame-retardant plywood, so that the cost can be effectively reduced.