Our Products

Quartz


Quartz

Quartz (SiO2 or silicon dioxide) is crystalline silica, the second most common mineral in the crust of the earth. It is well known for its hardness and its use in glass. However, different types of glass require different SiO2 purity levels with the most basic flat glass (e.g. house windows) only requiring SiO2 purities of about 98.5%, while more complex glass such as solar glass or LCD glass have desired purities in excess of 99.95% SiO2. Although silicon dioxide is abundant, not all deposits are chemically exact, with the SiO2 purity and the levels of various trace element impurities varying across different deposits. Contamination of quartz can be from mineral and fluid inclusions and non-silica elements entering atomic sites usually occupied by silicon and oxygen. I-Minerals is developing three quartz products under the TrueQTM that offer different SiO2 purities and each product will be available in a variety of grinds. TrueQ1TM is a single float +99.9% SiO2 product, TrueQ2TM is a twice floated +99.94% SiO2 product and TrueQ3TM is a thrice floated +99.97% SiO2 product.

Uses

Higher value applications for quartz products the Company is targeting include sodium silicate, fused silica, epoxy molding compounds, square quartz crucibles for polysilicon manufacture, Halogen, fluorescent and xenon lamps, quartz for making fused silica grain, specialty ceramic glazes, paint, solar glass, optical glass, art glass, glass bulbs, liquid crystal display (LCD) glass. Fused silica grain is a raw material for square silica crucibles used to produce directionally solidified, polycrystalline, solar cells. +5ppm of Ti is limiting the use of TrueQ3 in mainstream LED and fibre optic applications, but I-Minerals is undertaking additional testing to see how much Ti can be removed and in the interim it is examining quartz fibers and quartz tubes that are doped with titanium for optical and/or catalyst application (e.g. lasers and tanning lights).