Mixed-valence europium-doped strontium magnesium lanthanum oxygen-based apatite silicate luminescent material and preparation method thereof

Abstract

The invention discloses a mixed-valence europium-doped strontium magnesium lanthanum oxygen-based apatite silicate luminescent material. Strontium magnesium lanthanum silicates are used as a fluorescent body matrix, europium ions are used as doping ions, and the raw materials are strontium carbonate, magnesium carbonate, lanthanum oxide, silicic acid and europium oxide. At the same time, a fluxingagent boric acid and an accelerant are added, wherein the addition amount of the boric acid is 2%-2.5% of the total mass of the raw materials, and the addition amount of the accelerant is 1.5% of thetotal mass of the raw materials. The luminescent material is prepared by a high-temperature solid-phase method. The accelerator comprises the following components: titanium bis(triethanolamine)diisopropoxide, 2,5-difluorobenzylzinc bromide, (3,4-epoxycyclohexyl)ethyltriethoxysilane, (4-carboxybenzyl)methylbicarbamic acid dibenzyl ester, bis(2,2,6,6-tetramethyl-3,5-heptanedionato)calcium, and tetrakis(ethylmethylamino)zirconium. The final luminescent material gives out pure white light, the color rendering index can reach 90, the color temperature is around 4000 K, and the luminescent materialcan be used for indoor lighting.

Description

technical field [0001] The invention relates to a luminescent material, more specifically to a mixed valence europium co-doped strontium magnesium lanthanum oxyapatite silicate luminescent material and a preparation method thereof. Background technique [0002] Lamp is a great invention for human beings to conquer the night. Since Edison invented the incandescent lamp, you can see light everywhere even in the dark; It is also larger; with the advancement of science and technology, people have invented LEDs to replace incandescent lamps; LED is a diode that can emit light, and it is a solid-state semiconductor device that can convert electrical energy into visible light. It has long life and energy efficiency. High, small size, fast response, no pollution, energy saving and environmental protection, etc., are widely used in lighting, health care, national defense technology and other fields. [0003] Among them, the white light LED is mainly composed of two parts: the LED co...

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Problems solved by technology

[0002] Lamp is a great invention for human beings to conquer the night. Since Edison invented the incandescent lamp, you can see light everywhere even in the dark; It is also larger; with the advancement of science and technology, people have invented LEDs to replace incandescent lamps; LED is a diode that can emit light, and it is a solid-state semiconductor device that can convert electrical energy into visible light. It has long life and energy efficiency. High, small size, fast response, no pollution, energy saving and environmental protection, etc., widely used in lighting, health care, national defense technology and other fields

[0003] Among them, the white light LED is mainly composed of two parts: the LED core light-emitting chip and the phosphor powder that can be excited by the light emitted by the LED core light-emitting chip; The chips are coated with phosphors that can be effectively excited to compound white light. The simplest and most commonly used method is GaN-based blue LED chips with yellow phosphors; The color chip itself will change with temperature and driving voltage, resulting in too high color temperature, the color temperature is above 5000K, and the color temperature of indoor lighting generally needs to be around 4000K; because long-term use of LED light with high color temperature is easy to cause damage to the user's retina. Irreversible damage, so the luminescent material can only be used outdoors, not suitable for indoor lighting

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