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Anion powder
Negative ion powder is a general term for powder materials that can produce air negative ions. Negative ion powder is usually composed of rare earth elements, electric stone powder and other substances. Some are prepared by mechanochemical compounding of rare earth salt and tourmaline; Some are mainly natural mineral tourmaline, which are prepared by means of ultra-fine grinding, gel coating modification, ion exchange doping and high temperature activation; Some of them are directly extracted and ground from rare earth ore powder or rare earth waste slag.
