Product Description
Negative ion powder is a general term for powder materials that can generate air negative ions. Anion powder is usually composed of rare earth elements, tourmaline powder and other substances . Some are made by mechanochemical compounding of rare earth salts and tourmaline ; some are made of natural mineral tourmaline , which is made by ultrafine crushing, gel coating modification, ion exchange doping and high temperature activation, etc. ; Some are directly extracted and ground from rare earth ore powder or waste slag .
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