High Purity Alumina (HPA)


High Purity Alumina (HPA)

HPA is a high-value, high margin and highly demanded product as it is the critical ingredient required for the production of synthetic sapphire. Synthetic sapphire is used in the manufacture of substrates for LED lights, semiconductor wafers used in the electronics industry, and scratch-resistant sapphire glass used for wristwatch faces, optical windows and smartphone components.  There is no substitute for HPA in the manufacture of synthetic sapphire.

Global HPA demand is approximately 25,315tpa (2016) and demand is growing at a compound annual growth rate (CAGR) of 16.7% (2016-2024), primarily driven by the growth in worldwide adoption of LEDs. As an energy efficient, longer lasting and lower operating cost form of lighting, LED lighting is replacing the traditional incandescent bulbs.


On the basis of purity, the global HPA market can be divided into the following products:

  • 4N category - 99.99% Al2O3, with an impurity level of only 0.01 percent (100ppm)
  • 5N category - 99.999% Al2O3, with an impurity level of only 0.001 percent (10ppm)
  • 6N category - 99.9999% Al2O3, with an impurity level of only 0.0001 percent (1ppm)