4results about How to "Improve sintering performance" patented technology

This invention discloses a method for preparing magnesium aluminum spinel using calcium aluminate filter residue from water treatment agents, belonging to the field of magnesium aluminum spinel synthesis technology. The method involves drying the calcium aluminate filter residue from water treatment agents and then calcining it at a low temperature of 400-800℃ to obtain an intermediate material. This intermediate material is then mixed with a magnesium source and rare earth oxides and ball-milled to obtain a mixed powder. The mixed powder is then pressed into pellets and sintered at a high temperature of 1400-1700℃ to obtain magnesium aluminum spinel. This method uses calcium aluminate filter residue from industrial solid waste water treatment agents as the main raw material, fully utilizing its raw material characteristics to prepare a high-purity, high-density magnesium aluminum spinel product, achieving high-value utilization of waste. Furthermore, this method is simple to operate, low-cost, and easy for industrial production.

The application discloses a high-performance aluminum nitride ceramic rapid sintering method and belongs to the technical field of ceramic materials, and comprises the following steps: preparing ceramic raw materials according to a formula: uniformly mixing high-purity aluminum nitride powder, a sintering aid, a hydrolysis-resistant agent and a solvent, and drying under a nitrogen atmosphere; the ratio of the high-purity aluminum nitride powder, the sintering aid and the hydrolysis-resistant agent is 1:1%-3%:0.5%-1.5%; primary sintering of the ceramic: heat-press sintering the uniformly mixed aluminum nitride powder under a neutral or reducing atmosphere at 1650-1850 DEG C and a pressure of 20-30 MPa for 10-60 min, so that the density of the aluminum nitride powder reaches more than 99%; secondary sintering of the ceramic: sintering the primary-sintered aluminum nitride ceramic under a reducing atmosphere at 1850-2000 DEG C under normal pressure for 1-6 h. The prepared aluminum nitride ceramic not only has high heat conduction performance, but also has high sintering efficiency; meanwhile, the problem of waste gas generated in the degreasing process is avoided, and the environment is protected.

This invention discloses a Zisha mineral water filter, made from 60% Zisha clay, 20% tourmaline powder, 15% maifanite powder, and 5% clinoptilolite powder. The process involves vacuum refining, aging, molding, air-drying, and high-temperature sintering at 850℃ to produce mineralized ceramic blocks. The product can be directly placed in water cups or teapots, transforming tap water into weakly alkaline, small-molecule cluster active water (pH 7.4–8.2) within 10 minutes, dissolving beneficial minerals without heavy metal leaching. It is resistant to boiling water, does not pulverize, and does not cloud the water, with a service life of 6–12 months. This invention features a stable, safe, and convenient process suitable for daily drinking water, solving the problems of traditional filter media's single function, poor stability, and insufficient safety. It is suitable for healthy drinking water in homes and offices.

This invention relates to the field of conductive pastes, specifically a low-temperature conductive paste suitable for 3D printing, its preparation method, and its applications. The low-temperature conductive paste comprises silver nanoparticles, a diluent, and a binder; wherein the surface of the silver nanoparticles is coated with ligands; the diluent is an organic alcohol; and the binder is an alcohol-soluble resin. This invention aims to overcome the problems of easy agglomeration of silver nanoparticles and poor dispersibility during long-term storage in existing conductive pastes, leading to easy clogging of the 3D printing nozzle, poor conductivity after sintering, and poor adhesion. The low-temperature conductive paste prepared by this invention not only has good dispersibility and stability but also exhibits good density and conductivity after sintering, enabling high-precision direct-write 3D printing of 10 μm and below.