Abstract: A green fluorescent ceramic material, a preparation method therefor and the use thereof, are applicable in the field of fluorescent ceramics for LED lighting. The chemical constitution of the green fluorescent ceramic material is graphene-Y3-x-yAl5O12:x Ce3+, y Lu3+, with 0.0001?x?0.1, and 0.01?y?2.9; and the mass percentage of graphene is less than 0.5 wt % but is not 0 on the basis of the total weight of the green fluorescent ceramic material. The green fluorescent ceramic material has the characteristics of a high heat conductivity, a good heat dissipation property, and a controllable light-emitting wavelength within a range of 490-540 nm; and same is suitable for use as an LED encapsulating material.

Abstract: A white light LED chip packaged in inorganic material, a device, a preparation method therefor, and an application thereof are provided. The white light LED chip includes an LED chip wafer, an inorganic material packaging layer and a single crystal substrate. The LED chip wafer has at least one flip or vertical LED chip. The inorganic material packaging layer packages the LED chip wafer. The inorganic material packaging layer has a fluorescent transparent ceramic piece or a fluorescent crystal piece.

Abstract: Aluminum oxynitride (AlON) powder, a synthesis method thereof by direct nitridation under high pressure and use thereof, which belongs to the field of ceramic powder are presented. In the method, pure-phase AlON powder is synthesized by direct nitridation under high pressure with aluminum powder and alumina powder as starting materials. The powder has a spherical-like morphology, with a particle size ranging from 5 ?m to 15 ?m. The powder has good dispersibility and uniformity, and higher sintering activity. AlON transparent ceramic (1.2 mm thick) prepared from the AlON powder has a linear transmittance of more than 84%. The batch yield is on kilogram-scale; therefore, the method is suitable for large-scale production of the AlON powder.