Advantage of high purity alumina as LED phosphor

High purity alumina is widely used in LED lighting industry. Sapphire crystals, for example, made from highly purified alumina, are widely used as a substrate for LED chips. In addition, high purity alumina can also be used as phosphor in LED lighting. In this article, I will briefly introduce its application advantages as LED phosphor.

High purity alumina powder is an important basic material for preparing rare earth aluminate series phosphors and long afterglow phosphors in three primary colors for LED lighting. A 20-watt fluorescent lamp is as bright as a 40-watt fluorescent lamp and is called an energy-saving lamp because it is twice as efficient as one made of halogen powder.

1, high purity alumina reflected through the fluorescent layer of UV light, so that it continues to stimulate the phosphor, improve the luminous efficiency.

2. Blocking the diffusion of mercury can reduce the amount of mercury and prolong the service life.

3. As a binder, it can improve the bonding strength between the phosphor and the glass tube, so that the phosphor does not fall off.

The luminous degree and quality of LED lamps are directly affected by the purity, crystal shape, particle size distribution and other characteristics of alumina, so the quality requirements for high-purity alumina products are very high.