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Submicron Tm3+:beta-Li2TiO3 high purity blue light phosphor and preparation method

A sub-micron phosphor technology, applied in chemical instruments and methods, luminescent materials, etc., can solve the problems of uneven mixing of activators, poor particle uniformity, difficulty in entering the crystal lattice, etc. Good effect of improving coating performance

Active Publication Date: 2015-10-07
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The object of the invention is to provide a submicron Tm 3+ :β-Li 2 TiO 3 The high-purity blue light phosphor and its preparation method solve the problem of poor particle uniformity, poor coating, uneven mixing of activators and Tm 3+ Difficult to access β-Li 2 TiO 3 Lattice and other issues

Method used

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  • Submicron Tm3+:beta-Li2TiO3 high purity blue light phosphor and preparation method
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  • Submicron Tm3+:beta-Li2TiO3 high purity blue light phosphor and preparation method

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Embodiment 1

[0036] 1) Weigh a certain amount of Li 2 O particles are placed in a high-pressure container, and an appropriate amount of distilled water is added to the high-pressure container according to a filling ratio of 45% (referring to the ratio of the volume of distilled water to the volume of the high-pressure container). After fully dissolving, LiOH with a concentration of 3.00mol / L is formed in the high-pressure container. solution;

[0037] 2) According to the ratio of Li:Ti=1.95:1 (atomic molar ratio), weigh an appropriate amount of TiO 2 Powder. According to Tm 3+ The molar concentration is 6.0mol% (referring to Tm 3+ β-Li 2 TiO 3 molar concentration), weigh an appropriate amount of Tm 2 o 3 Powder. TiO 2 Powder and Tm 2 o 3 The powder is added to the high-pressure container of step 1;

[0038] 3) Place the high-pressure container in step 2 in an ultrasonic cleaning machine for ultrasonic treatment, the ultrasonic frequency is 10 kHz, and the processing time is 24 ...

Embodiment 2

[0044] 1) Weigh a certain amount of Li 2 O particles are placed in a high-pressure container, and an appropriate amount of distilled water is added to the high-pressure container according to a filling ratio of 60% (referring to the ratio of the volume of distilled water to the volume of the high-pressure container). After fully dissolving, LiOH with a concentration of 0.10 mol / L is formed in the high-pressure container. solution;

[0045] 2) According to the ratio of Li:Ti=2.25:1 (atomic molar ratio), weigh an appropriate amount of TiO 2 Powder. According to Tm 3+ The molar concentration is 2.0mol% (referring to Tm 3+ β-Li 2 TiO 3 molar concentration), weigh an appropriate amount of Tm 2 o 3 Powder. TiO 2 Powder and Tm 2 o 3 The powder is added to the high-pressure container of step 1;

[0046] 3) Place the high-pressure container in step 2 in an ultrasonic cleaning machine for ultrasonic treatment, the ultrasonic frequency is 25kHz, and the processing time is 20m...

Embodiment 3

[0052] 1) Weigh a certain amount of Li 2 O particles are placed in a high-pressure container, and an appropriate amount of distilled water is added to the high-pressure container according to a filling ratio of 50% (referring to the ratio of the volume of distilled water to the volume of the high-pressure container). After fully dissolving, LiOH with a concentration of 0.25mol / L is formed in the high-pressure container. solution;

[0053] 2) According to the ratio of Li:Ti=1.85:1 (atomic molar ratio), weigh an appropriate amount of TiO 2 Powder. According to Tm 3+ The molar concentration is 0.50mol% (referring to Tm 3+ β-Li 2 TiO 3 molar concentration), weigh an appropriate amount of Tm 2 o 3 Powder. TiO 2 Powder and Tm 2 o 3 The powder is added to the high-pressure container of step 1;

[0054] 3) Place the high-pressure container in step 2 in an ultrasonic cleaning machine for ultrasonic treatment, the ultrasonic frequency is 30 kHz, and the processing time is 30...

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Abstract

The invention provides a preparation method of submicron Tm3+:beta-Li2TiO3 high purity blue light phosphor, and the method comprises the following steps: dissolving Li2O particles in distilled water; preparing a LiOH solution whose mole concentration is 0.10-3.00 mol / L; adding Ti source and Tm source into the solution; performing mixing uniformly; carrying out a hydrothermal reaction for 1-20 hours at 100-240 DEG C in a baking oven; performing cooling in a furnace, fetching out hydrothermal products; drying the hydrothermal products; performing grinding uniformly; performing calcining for 6-36 hours at 500-700 DEG C. in an electric resistance furnace; cooling in furnace and grinding; and obtaining the high purity blue light phosphor.

Description

【Technical field】 [0001] The invention belongs to the technical field of preparing submicron powder by wet chemical method, in particular to a submicron Tm 3+ :β-Li 2 TiO 3 A preparation method of high-purity blue light phosphor. 【Background technique】 [0002] At present, rare earth luminescent materials have become the core materials in the fields of information display, lighting source, and optoelectronic devices. Among them, the most widely used is the phosphor material that can be excited by ultraviolet-near ultraviolet (200-450nm) to produce different luminescent colors. The high luminous intensity, high color purity and uniform particle size distribution of phosphor powder can significantly improve the performance of optoelectronic devices. Blue light phosphor is one of the most important components of three primary color phosphors. Since the advent of gallium nitride-based blue light phosphors, the research on blue light phosphors has become a hot spot in the LED...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/67
Inventor 于成龙高丹鹏王斐曹舒尧惠怀兵王道益江红涛宁青菊王莉丽郝欣
Owner SHAANXI UNIV OF SCI & TECH
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