Multicolour long-afterglow luminescent material for single matrix and preparation method thereof

Abstract

The invention provides a multicolour long-afterglow luminescent material for a single matrix and a preparation method thereof. The multicolour long-afterglow luminescent material for the single matrix comprises the chemical constitution of Ca1-xOSnO2SiO2:xRe<3+>, wherein CaSnSiO5 is the matrix, Re<3+> is a rare earth ion which serves as an activator ion, x is more than or equal to 0 and is less than or equal to 0.02, and R is any one of Pr, Sm, Tb and Dy. Calcium carbonate, silicic acid, tin oxide and rare earth oxide serve as raw materials; and after all components are weighed and evenly mixed at the chemical dose ratio of a target product, the mixture is calcined for 3-6h at the temperature of 1000-1380DEG C and is naturally cooled to the room temperature to obtain the multicolour long-afterglow luminescent material. The long-afterglow emision of blue light, red light, green light and white light can be respectively realized in the single matrix, and the multicolour long-afterglow luminescent material continuously lights above the luminescent luminance (0.32mcd/m<2>) which can be distinguished by human eyes. The preparation method is simple and is easy to operate.

Description

technical field [0001] The invention relates to a long afterglow luminescent material, in particular to a single matrix multicolor long afterglow luminescent material activated by trivalent rare earth ions, which belongs to the technical field of luminescent materials. Background technique [0002] Long afterglow luminescent material is a new type of environmentally friendly and energy-saving material. It can store part of the energy after absorbing the energy of sunlight or ultraviolet light, and then slowly release the stored energy in the form of visible light. After the light source is withdrawn Still can emit visible light for a long time. Since long-lasting luminescent materials are widely used commercially in display backlights, sign lighting, and luminous coatings, research on material composition and preparation processes has developed rapidly since the beginning of the 20th century. From the perspective of practical application, people hope to obtain long-lasting ...

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Problems solved by technology

However, this scheme must require that the luminous intensity and decay time of the three primary colors are basically the same. At present, the research on blue and green long-lasting luminescent materials is relatively mature, but the luminous intensity and afterglow time of red long-lasting materials are still not up to the requirements.

Moreover, due to the different physical and chemical properties of the substrates of the tri-primary long-lasting luminescent materials, as well as the difference in the excitation wavelength range of the luminescent center ions, the scheme of realizing the color change of long-lasting luminescence by mixing different tri-primary long-lasting luminescent materials still needs to be improved.

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