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Green titanium niobate up-conversion luminescent material, and preparation method and application thereof

A luminescent material, titanium niobic acid technology, applied in the direction of luminescent materials, chemical instruments and methods, etc., can solve the problems of complex preparation process, insufficient stability, environmental hazards, etc., achieve simple preparation process, improve excitation stability, and can good repeatability

Active Publication Date: 2017-06-30
NANJING TONGLI CRYSTAL MATERIALS RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, up-conversion luminescent materials are mainly concentrated in rare earth-doped fluoride, sulfide, halide and other systems, which can realize the emission of red, green, blue and white light. However, in practical applications, these matrix materials are not resistant to radiation and stable Insufficient, and the material itself is harmful to the environment, and the preparation process is also complicated, which has a great impact on the use and popularization of up-conversion luminescent materials.

Method used

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  • Green titanium niobate up-conversion luminescent material, and preparation method and application thereof
  • Green titanium niobate up-conversion luminescent material, and preparation method and application thereof
  • Green titanium niobate up-conversion luminescent material, and preparation method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0027] According to the chemical formula Ca 4.4 Er 0.3 Yb 0.3 Nb 4 Ti 3 o 21 The stoichiometric ratio of each element, respectively weigh calcium carbonate CaCO 3 : 2.20 g, erbium oxide Er 2 o 3 : 0.2869 g, ytterbium oxide Yb 2 o 3 : 0.2956 g, niobium pentoxide Nb 2 o 5 : 2.6580 g, titanium oxide TiO 2 : 1.1981 grams, ground and mixed uniformly to obtain a mixture; the obtained mixture was placed in a muffle furnace, pre-sintered in an air atmosphere, the pre-sintering temperature was 1100 ° C, and the time was 1 hour; the above-mentioned pre-sintered mixture was naturally cooled , ground and mixed evenly, placed in a muffle furnace, calcined in an air atmosphere, the calcined temperature was 1400°C, the calcined time was 1 hour, naturally cooled to room temperature, and the calcium titanium niobate up-conversion luminescent material was obtained after uniform grinding.

[0028] See attached figure 1 , is the X-ray powder diffraction pattern of the sample prepared...

Embodiment 2

[0032] According to the chemical formula Ca 4.994 Er 0.002 Yb 0.004 Nb 4 Ti 3 o 21 The stoichiometric ratio of each element, respectively weigh calcium oxide CaO: 1.9144 grams, erbium nitrate Er (NO 3 ) 3 ·5H 2 O: 0.0045 g, ytterbium nitrate Yb (NO 3 ) 3 ·5H 2 O: 0.0091 g, niobium pentoxide Nb 2 o 5 : 5.400 g, titanium oxide TiO 2 : 1.1981 g, ground and mixed uniformly to obtain a mixture; the obtained mixture was placed in a muffle furnace, pre-sintered in an air atmosphere, the pre-sintering temperature was 1000 ° C, and the pre-sintering time was 5 hours; the pre-sintered mixture was naturally cooled After that, put it in the muffle furnace again, and pre-sinter it for the second time in the air atmosphere. The pre-sintering temperature is 1200 ° C, and the time is 10 hours; after grinding and mixing evenly, it is placed in the muffle furnace and calcined in the air atmosphere. , the calcination temperature is 1200° C., the calcination time is 15 hours, natural...

Embodiment 3

[0035] According to the chemical formula Ca 3.8 Er 0.6 Yb 0.6 Nb 4 Ti 3 o 21 The stoichiometric ratio of each element takes by weighing calcium oxide CaO: 1.064 grams respectively; Erbium nitrate Er (NO 3 ) 3 ·5H 2 O: 0.675 g, ytterbium nitrate Yb (NO 3 ) 3 ·5H 2 O: 1.365 g, niobium pentoxide Nb 2 o 5 : 2.6580 g, titanium oxide TiO 2 : 1.1981 g is the prepared raw material, ground and mixed uniformly to obtain a mixture; the obtained mixture is placed in a muffle furnace, pre-sintered in an air atmosphere, the pre-sintering temperature is 1000 ° C, and the time is 8 hours; the above-mentioned pre-sintering The mixture is naturally cooled, ground and mixed evenly, placed in a muffle furnace, calcined in an air atmosphere, the calcined temperature is 1250 ° C, the calcined time is 8 hours, naturally cooled to room temperature, and the up-converted titanium niobate is obtained after uniform grinding Calcium luminescent material.

[0036] The X-ray powder diffraction...

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Abstract

The invention discloses a green titanium niobate up-conversion luminescent material, and a preparation method and application thereof. The green titanium niobate up-conversion luminescent material has a general chemical formula of Ca<5-5x>Er<5x>Yb<5y>Nb<4>Ti<3>O<21>, wherein x is the doping mol ratio of Er<3+> ions, y is the doping mol ratio of Yb<3+> ions, and the sum of x and y is no less than 0.001 and no more than 0.20. The green titanium niobate up-conversion luminescent material prepared in the invention has uniform particles, and under the excitation of light with a wavelength of 976 nm, the material emits green light with a wavelength of about 550 nm and has high luminescent intensity and high up-conversion luminescent efficiency. The green titanium niobate up-conversion luminescent material has good stability, no toxicity and no pollution and can be widely applied to fields like infrared radiation detection, optical fiber communication technology, fiber amplifiers, three-dimensional stereo display and biomolecular fluorescent marking. The preparation method is simple, safe, low in production cost, not restricted by raw material supply and easy for operation and industrial production.

Description

technical field [0001] The invention relates to the preparation and application of a titanium niobate green up-conversion luminescent material, belonging to the technical field of inorganic luminescent materials. Background technique [0002] Stokes' law believes that materials can only be excited by high-energy light and emit low-energy light, but later people discovered that some materials can actually achieve a luminous effect that is exactly the opposite of the above-mentioned law, called anti-Stokes luminescence. Also known as up-conversion luminescence (Up-Conversion), the energy of its radiation is greater than the energy absorbed. The principle of luminescence is that when the light source shines on the surface of the material, the particles will absorb two or more low-energy excitation photons, and the electrons will transition from the ground state to The high-energy state then radiates high-energy photons outward, and the frequency of the radiated high-energy phot...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/67
CPCC09K11/7768
Inventor 乔学斌
Owner NANJING TONGLI CRYSTAL MATERIALS RES INST CO LTD
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