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High purity quartz

High purity quartz

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High purity quartz (HPQ) is a very high-quality form of quartz that has exceptionally low levels of impurities. It is highly sought after in industries that require materials with minimal contamination, such as electronics, semiconductors, and high-end optical applications.


  1. Chemical Composition: High purity quartz typically consists of more than 99.99% silicon dioxide (SiO₂). The levels of impurities such as iron, aluminum, and titanium are extremely low, often measured in parts per million (ppm).
  2. Physical Properties:
  • Optical Clarity: HPQ has excellent optical clarity, making it ideal for high-performance optical applications.
  • Thermal Stability: It exhibits very low thermal expansion and high resistance to thermal shock.
  • Mechanical Strength: HPQ has high mechanical strength and hardness.
  • Chemical Resistance: It is highly resistant to most chemicals, except hydrofluoric acid.

Production Process

  1. Mining: High purity quartz deposits are rare and are mined using specialized methods to avoid contamination. The raw quartz is carefully extracted to ensure the highest possible purity.
  2. Beneficiation: The raw quartz undergoes various processing steps to increase purity. This can include crushing, grinding, washing, and chemical treatments to remove impurities.
  3. Purification: Advanced purification techniques such as flotation, acid leaching, and thermal processing are used to further enhance the purity of the quartz. In some cases, high temperature chlorination is used to remove trace impurities.
  4. Screening and Classification: The purified quartz is then screened and classified based on size and quality to meet specific industry requirements.


  1. Semiconductor Industry: HPQ is critical in the production of silicon wafers used in semiconductors. Its high purity ensures that there are minimal defects in the wafers, which is crucial for the performance of electronic devices.
  2. Optical Applications:
  • Lenses and Optics: Due to its exceptional optical clarity, HPQ is used in high-end lenses, prisms, and other optical components.
  • Fiber Optics: HPQ is used to produce optical fibers for telecommunications and data transmission, where purity is essential for signal clarity and strength.
  1. Solar Industry: HPQ is used in the production of photovoltaic cells for solar panels. High purity quartz ensures efficient conversion of sunlight into electricity.
  2. Laboratory Equipment: Due to its chemical resistance and thermal properties, HPQ is used in the manufacture of high-quality laboratory glassware and equipment.
  3. Lighting Industry: HPQ is used in the production of high-intensity discharge lamps and other lighting applications that require materials with high thermal and optical performance.

High purity quartz is a highly refined form of quartz with very low levels of impurities, making it essential for applications requiring high-performance materials. The production of HPQ involves careful mining, beneficiation, and advanced purification techniques to achieve the highest levels of purity. HPQ is widely used in the semiconductor industry, optical applications, solar energy, laboratory equipment, and lighting due to its exceptional chemical, thermal, and optical properties.