Sapphire ingots LED Grade

Product Description

studied material and a thin ruby plate are clamped between sapphire plates. Under the influence of electric current or laser heating on the investigated plate, a pressure of ~100 kbar arises during 1–2 ms.

The pressure is measured from the shift in the ruby luminescence peak value. A pulse at l = 532 nm is applied to the ruby plate via a light guide and the sapphire plate.

The luminescence signal is passed at l = 700 nm using the same light guide. The shift of the luminescence peak at this signal, equal to 0.5 nm, corresponds to an increase in pressure by 20 kbar.3.

As an expendable transducer, high-quality ruby with a chromium content of 0.5–0.7% is used.

Ruby-based pressure transducers are used for hydrostatic pressures on the order of 60 kbar. Such a sensor is shaped as a disk, with a diameter of 0.6 mm and a thickness of 0.1 mm, and contains 4·10 14 spins. 

Although there are lots substrates which are regarded as potential materials to replace sapphire substrate, it is still dominated in the substrates (for GaN LED growth) market, because of its reasonable price and relatively low mismatch. Zhongju is capable of processing substrates according to customer needs. Currently, our sapphire substrate productions ranges from 2 to 12 inches with high quality and accurate orientation.

Table 1 Size of substrates

Table 2 Specification of substrates