What is the difference between Zhangjiakou iron oxide red and micaceous iron oxide red?
The theoretical elements are basically the same, but the grain structure of the products in different regions will be slightly different
A red inorganic pigment synthesized in a chemical manner with alpha -Fe2O3 as its chief constituent. Powder with pale red to dark red. The refractive index is from 2.94 to 3.22. Oil absorption, particle shape and particle size, surface area and relative density are determined by the preparation method. Iron oxide red available wet and dry wet preparation, is to scrap iron and sulfate (or nitrate) and sodium hydroxide as the main raw material, preparation of seed crystal, crystal growth and air oxidation in solution, the formation of iron oxide red, filtered and dried. The product particle shape is rhombohedral; dry method is to ferrous sulfate, iron oxide black or yellow iron oxide as raw materials, high temperature calcination to form iron oxide red, the product shape can be spherical or needle. Mainly used in paints, plastics, building materials, leather and other coloring pigments, but also as paint antirust pigment, can also be used as polishing agents and the preparation of ferrite raw materials.
The composition is Fe2O3, a pigment made from natural minerals. Mica is called mica iron oxide because of its mica like flake structure, but in fact it does not contain mica. More varieties of ferric oxide content of up to 92%, gray powder with red phase, particle diameter of 5~100 microns, is a kind of coarse pigment. The utility model is mainly prepared by using the flaky structure, and the antirust paint is prepared, because of the close arrangement of the flakes and the physical barrier function, the antirust property of the antirust paint is improved. Preparation method for ore selection, after crushing, water, drying, sieving and grading. China has rich mineral resources for development and utilization.
