White light fluorescent powder non-activated by rare earth ions and preparation method thereof

Abstract

The invention discloses white light fluorescent powder non-activated by rare earth ions. The fluorescent powder is a solid solution prepared by enabling a substance A, Y2O3 and a substance B to react under a high-temperature weakly-reducing atmosphere according to a molar ratio of (1-2):1:(0.1-10), wherein the substance A is one of CaCO3 and CaO, or a mixture of any proportions of CaCO3 and CaO; the substance B is one of ZnCO3 and ZnO, or a mixture of any proportions of ZnCO3 and ZnO; when the substance A and the substance B are the mixtures, the sum of mole fractions keeps unchanged according to a stoichiometric ratio. Meanwhile, the invention also discloses a preparation method of the fluorescent powder. The preparation method comprises the steps of mixing the substance A, Y2O3 and the substance B, and reacting for 0.5-5 hours under the high-temperature weakly-reducing atmosphere at 900-1500 DEG C to obtain the white light fluorescent powder. The white light fluorescent powder disclosed by the invention is simple in preparation process, good in operability and low in raw material cost; the white light fluorescent powder with a good luminescence property can be prepared without consuming rare earth resources; the white light fluorescent powder is high in environmental protection coefficient and easy in industrial production, popularization and application.

Description

technical field [0001] The invention relates to a fluorescent powder and a preparation method thereof, in particular to a white light-emitting fluorescent powder activated by non-rare earth ions and a preparation method thereof. Background technique [0002] Phosphor powder, also known as luminous powder, is a substance that emits light under the action of ultraviolet rays, visible radiation and electric fields. It has a variety of colors and can be widely used in fluorescent lamps, energy-saving lamps, LED lamps, display screens, instruments and Emergency signs and other fields. At present, phosphor powder emits white light mainly through the following two methods: 1. Use blue light chip to excite yellow phosphor powder to emit white light; 2. Use ultraviolet light source to excite a certain ratio of red, green and blue three primary color phosphors to couple and emit white light. In addition, there are also those that use near-ultraviolet to excite a single matrix to gene...

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Problems solved by technology

[0003] The purpose of the present invention is to provide a non-rare-earth ion-activated white light phosphor and its preparation method to solve the need to add and consume rare earth resources in the preparation of existing white light-emitting phosphors, the cost of materials is high, the preparation process is complicated, and the production control is poor. The problem

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