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Eu 3+ and Ti 4+ion co-doped niobate tantalum salt red fluorescent powder and preparation method and application thereof

A red phosphor, niobium tantalate technology, applied in chemical instruments and methods, luminescent materials, electrical components, etc., can solve the problems of cold tone and insufficient color temperature, and achieve high luminous efficiency, wide application prospects, and excellent thermal stability. sexual effect

Active Publication Date: 2019-07-12
CHANGZHOU VOCATIONAL INST OF ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current LED lighting equipment is mostly prepared based on blue LED chips and yellow phosphor powder. Its obvious disadvantage is that the color temperature is insufficient, and it shows obvious cool colors.

Method used

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  • Eu 3+ and Ti 4+ion co-doped niobate tantalum salt red fluorescent powder and preparation method and application thereof
  • Eu 3+ and Ti 4+ion co-doped niobate tantalum salt red fluorescent powder and preparation method and application thereof
  • Eu 3+ and Ti 4+ion co-doped niobate tantalum salt red fluorescent powder and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Preparation of LiCa 1.6 Eu 0.4 Nb 1.6 Ti 0.4 TaO 10 , including the following steps:

[0030] S1: weighing, according to the chemical expression LiCa 1.6 Eu 0.4 Nb 1.6 Ti 0.4 TaO 10 The stoichiometric ratio of each element in (x=0.2) Weigh the raw material: Li 2 O: 1.35 g; CaCO 3 : 14.4 g; Eu 2 o 3 : 6.336 g, Nb 2 o 5 : 19.1374 grams; Ta 2 o 5 : 19.89 g, TiO 2 : 2.88 grams;

[0031] S2: Pre-calcination, put the raw material weighed in step S1 into an agate mortar and grind to obtain a raw material mixture powder, extrude the raw material mixture powder into a block, and place it in an air atmosphere for pre-calcination, the pre-calcination temperature is 850°C, the pre-calcination time is 4 hours, and the pre-calcined product is obtained;

[0032] S3: secondary calcination, after cooling the pre-calcined product in step S2 naturally, put it into an agate mortar and grind it again to obtain a pre-calcined product powder, extrude the pre-calcined produc...

Embodiment 2

[0040] Preparation of LiCa 1.994 Eu 0.006 Nb 1.994 Ti 0.006 TaO 10 , including the following steps:

[0041] S1: weighing, according to the chemical expression LiCa 1.994 Eu 0.006 Nb 1.994 Ti 0.006 TaO 10 The stoichiometric ratio of each element in (x=0.003) takes by weighing raw material: Li 2 CO 3 : 1.85 grams; Ca(NO 3 ) 2 : 16.35 g; Eu 2 o 3 : 0.0528 g, Nb 2 o 5 : 13.25 grams; Ta 2 o 5 : 11.05 g, TiO 2 : 0.024 grams;

[0042] S2: Pre-calcination, put the raw material weighed in step S1 into an agate mortar and grind to obtain a raw material mixture powder, extrude the raw material mixture powder into a block, and place it in an air atmosphere for pre-calcination, the pre-calcination temperature is 800°C, the pre-calcination time is 10 hours, and the pre-calcined product is obtained;

[0043] S3: secondary calcination, after cooling the pre-calcined product in step S2 naturally, put it into an agate mortar and grind it again to obtain a pre-calcined pro...

Embodiment 3

[0047] Preparation of LiCa 1.5 Eu 0.5 Nb 1.5 Ti 0.5 TaO 10 , including the following steps:

[0048] S1: weighing, according to the chemical expression LiCa 1.5 Eu 0.5 Nb 1.5 Ti 0.5 TaO 10 The stoichiometric ratio of each element in (x=0.25) Weigh the raw material: Li 2 CO 3 : 1.48 g; CaCO 3 : 6 grams; Eu 2 o 3 : 3.52 g, Nb 2 o 5 : 7.974 grams; Ta 2 o 5 : 8.84 g, TiO 2 : 1.6 grams;

[0049] S2: Pre-calcination, put the raw material weighed in step S1 into an agate mortar and grind to obtain a raw material mixture powder, extrude the raw material mixture powder into a block, and place it in an air atmosphere for pre-calcination, the pre-calcination temperature is 1000°C, the pre-calcination time is 1 hour, and the pre-calcined product is obtained;

[0050] S3: secondary calcination, after cooling the pre-calcined product in step S2 naturally, put it into an agate mortar and grind it again to obtain a pre-calcined product powder, extrude the pre-calcined prod...

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Abstract

The invention discloses Eu 3+ and Ti 4+ion co-doped niobate tantalum salt red fluorescent powder and a preparation method and an application thereof, wherein the chemical expression is LiCa 2 -2xEu2 -2xNb 2 -2xTi2-TaO10, x is mol number of Eu 3+ and Ti 4+ respectively dopping and substituting Ca2+ and Nb5+, and the x is greater than or equal to 0.003 but less than or equal to 0.25. The fluorescentpowder prepared by the preparation method has stronger excitation efficiency in near-ultraviolet and blue-light wavelength regions, red light with a main peak of 615 nm under the excitation of 200-500 nm light is emitted, the luminous life is 1.0 ms or more, and the requirements of luminous illumination and display without generating afterglow, so that the fluorescent powder has wide applicationprospect in the field of near-ultraviolet or blue-light semiconductor chip luminous devices; and in addition, the preparation method of the fluorescent powder is a solid-phase reaction synthesis method with simple synthesis steps and high practicability.

Description

technical field [0001] The invention belongs to the technical field of inorganic fluorescent materials, in particular to a Eu 3+ and Ti 4+ Ion co-doped niobium tantalate red phosphor, preparation method and application. Background technique [0002] During the development of human society, lighting and display have always been one of the important subjects of scientific research. In modern times, most of the human lighting uses metal mercury Hg to discharge under high voltage, thereby activating the fluorescent powder to bring about various lighting methods. However, this method has obvious disadvantages, for example, the low luminous efficiency causes energy loss, and there is great pollution to human beings in the process of preparation and scrapping of lighting equipment. [0003] The green revolution of lighting is based on fluorescent conversion type white light LED device lighting prepared by semiconductor diodes. Compared with traditional Hg-based lighting, semico...

Claims

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Application Information

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IPC IPC(8): C09K11/67H01L33/50
CPCC09K11/7731H01L33/502
Inventor 唐惠东杨蓉
Owner CHANGZHOU VOCATIONAL INST OF ENG