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What are the production methods of ceria polishing slurry?
source：www.btslckj.cn | Release time：2022年04月02日the production methods of ceria polishing slurry include slurry phase method, precipitation method, hydrothermal method, etc. next, the small editor of rare earth polishing powder manufacturer will introduce in detail:
slurry phase method.
compared with solid-phase method and gas-phase method, slurry-phase method has the advantages of less strict physical conditions, convenient operation and particle control, so it has been studied. At present, there are precipitation methods, sol-gel method, hydrothermal method and microemulsion method for preparing nano dioxide dioxide by slurry phase method.
precipitation method is used to synthesize high-purity nanoparticles by slurry-phase chemistry. It is a typical slurry phase method, mainly including direct precipitation, homogeneous precipitation, coprecipitation and so on. There are many reports on the preparation of nano-sized oxide caves.
in the precipitation method, the key problem of synthesis is to inhibit the agglomeration of particles. For example, Ce (NO3) 3 is precipitated with ammonia and then frozen with slurry nitrogen. After dehydration twice at room temperature, nano-sized oxide cave powder with average particle size of 7Nm and specific surface area of 89m2 / G can be obtained.
hydrothermal method.
hydrothermal method is to create a high-temperature and high-pressure reaction environment by heating the high-pressure reactor with water as the medium in a special high-pressure reactor, so that insoluble or insoluble substances can be dissolved and recrystallized. Hydrothermal synthesis has been used to prepare rare earth oxide nano powder.
for example, y2o3-ceo2-zro2 powder with an average particle size of about 10 nm can be heated with ethanol water and then heated with water. Narrow particle size distribution and good dispersion.
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