High purity quartz is also known as HPQ. The industry standard for HPQ is defined by a product marketed as IOTA, mined by Sibelco. IOTA has set a high-purity benchmark for the rest of the HPQ market. It contains 20 ppm per million as a standard, equating to 99.998% of SiO2. The IOTA brand is the industry standard for high-quality fused quartz products.
High purity quartz is a vital industrial component required in the production of all high-end electronics applications, semi-conductors, and photovoltaic (PV) solar panels. None of these products can be manufactured without reliable supply of consistent-purity HPQ.
The processing required to produce HPQ depends on the amount and type of impurities present in raw quartz and it may include crushing, screening, floatation, acid washes by using hydrofluoric acid (which is a waste product from a phosphoric acid plant), magnetic separation, and/or other physical, chemical, and thermal techniques. Lower the level of transitional elements, purer the material extracted from the ground and lesser the processing required to produce a valuable product.
Processing of raw quartz into high purity quartz involves advanced comminution technology as well as physical, thermal and chemical steps. High purity quartz is used in solar panels and semiconductors. It is geologically rare and costlier than the lower-grade material.
Deposits of HPQ are rare and the largest known occurrence is in Alaskite igneous rocks near Spruce Pine, North Carolina (the U.S.). Only a few deposits of quartz can present contamination levels lower than 0.003%. Currently, only two or three large-sized companies based in the U.S. and Europe are producing high purity quartz.
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