H.C. Materials Corporation(HCMC) also develops and manufactures
FLUORINE MICA CRYSTALS (SYNTHETIC FLUOROPHLOGOPITE,
KMg3(AlSi3O10)F2).
The synthetic fluorine mica, fluorophlogopite KMg3(AlSi3O10)F2,
contains no (OH)- of the natural phlogopite KMg3(AlSi3O10)(OH)2.
The (OH)- is fully substituted with F- . Large fluorine mica crystals of high quality are grown
by a Bridgman-Stockbarger method using platinum crucibles with seeds. The fluorine mica has the
following unique characteristics: highly chemical stability, excellent transmittance, outgasing-free
at high temperature in vacuum, excellent electrical insulation, high heat endurance (up to 1100 °C),
non-radioactive background, highly flexible and cleavable, which are much superior to that of natural mica.
The synthetic mica sheets are suitable for a variety of uses such as substrates of thin
film, windows and monochromater for x-ray, neutron diffraction, microwave and optics,
spacers of electrical vacuum devices, supporters at high temperature and water-gauges of high
pressure boilers, and etc., which are important in modern industry and most advanced branches
of science.
