抄録
The synthetic method of mica corresponding to three kinds of production situations is considered. Since the melting method has high concentration, yield becomes high.
The mineral kind which can do the biggest crystal of synthetic mica is fluoro-phlogopite (KMg3A1Si3O10F2). The feature of fl uoro-phlogopite is a pure crystal. Compared with it, the crystal of tetrasilsic mica does not become large like fluoro-phlogopite.
The greatest use of synthetic mica is cosmetics. It is mainly makeup cosmetics that synthetic mica is used. The high aspect ratio particle with transparent gloss is obtained only from fluoro-phlogopite. Transparent gloss hides a blotch or wrinkles, and it is shown like a bright natural skin.
The pure crystal of fluoro-phlogopite is not somber. It makes transparent gloss and clear interference color. Therefore, it is indispensable for basis material of pearl mica paints.
In recent years, there is much research of the silicon wafer polish using mica. The wafer ground by K tetrasilsic mica (KMg2.5 Si4O10F2) has few scratches, and a good polish side can be acquired.
The gas barrier film that coated Na tetrasilsic mica (NaMg2.5 Si4O10F2) and poly vinyl alcohol were devised for food packing. Na tetrasilsic mica synthesized by melting method have high aspect ratios. The film coated with Na tetrasilsic mica demonstrates high barrier nature.
Synthesis could give various characteristics, such as a high purity crystal, a large crystal, and a high aspect ratio, besides these, and various applied technologies have been developed
