Novel green fluorescent powder with Tb<3> doped tungstate

A technology of green fluorescent powder and tungstate, applied in the direction of luminescent materials, chemical instruments and methods, etc.

Inactive Publication Date: 2018-02-13
UNIV OF JINAN
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Problems solved by technology

[0002] With the continuous update of photoluminescent materials and the development of LED

Method used

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  • Novel green fluorescent powder with Tb&lt;3&gt; doped tungstate
  • Novel green fluorescent powder with Tb&lt;3&gt; doped tungstate

Examples

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Embodiment 1

[0016] (1) The rare earth oxide (Gd 2 o 3 and Tb 4 o 7 ) dissolved in hot nitric acid to prepare 0.5mol / L rare earth nitrate solution, measure 0.2mol rare earth nitrate solution (0.18mol of gadolinium nitrate and 0.02mol of terbium nitrate) into 50ml of deionized water, stir to mix Uniform;

[0017] (2) Weigh 0.3mol Na according to RE:W=2:3 2 WO 4 2H 2 O white particles were dissolved in 20ml deionized water, stirred to make the mixture evenly;

[0018] (3) Drop the uniformly stirred solution in step (1) into the solution obtained in step (2) with a pear-shaped separating funnel, and continue stirring for 30 minutes after the titration to obtain a mixed solution;

[0019] (4) Add sodium hydroxide solution dropwise to the mixed liquid in step (3) to adjust to Ph=7, then move it into the reaction kettle, put it in an electric oven at 120°C for hydrothermal reaction for 24 hours, and wait for the reaction kettle to cool down to room temperature. Take out the reaction kett...

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Abstract

The invention discloses novel green fluorescent powder with Tb<3> doped tungstate. The novel green fluorescent powder is chemically composed of (Gd0.9Tb 0.1) 2 (WO4) 3. The synthesis method of the fluorescent powder includes that lanthanide nitrate and a sodium tungstate solution are mixed according to chemometry to serve as parent salt solution which is moved to a reaction kettle after complete mixing, the parent salt solution is then put in an air dry oven for reaction for a certain time under high temperature and high pressure, and white precipitates are obtained; white precursor powder isobtained via centrifuging, cleaning and drying on the basis of the white precipitates, and finally, the novel green fluorescent powder with Gd2 (WO4) 3: Tb<3+> is obtained via calcination. The prepared fluorescent powder is good in green emission, energy transfer effect exists among Gd<3+>->Tb<3+>, light intensity of Tb<3+> can be enhanced remarkably, and the novel green fluorescent powder is expected to be a lighting display material of the new generation.

Description

technical field [0001] The invention belongs to the field of rare earth luminescent materials, in particular to a Tb 3+ A new type of green phosphor doped with tungstate. Background technique [0002] With the continuous update of photoluminescent materials and the development of LED technology, the traditional LED light source can no longer meet the growing needs of people. [0003] Tungstate is a typical self-activating material, which can emit high-efficiency fluorescence under the excitation of ultraviolet (UV), X-ray and other light sources, and Gd 3+ It can be used as a host material and a good sensitizer; therefore, it is of great significance to explore the dual sensitization effect of host materials on activator ions on the basis of traditional phosphors. Contents of the invention [0004] The present invention aims to propose a Tb 3+ A new type of green phosphor doped with tungstate. [0005] A kind of Tb proposed by the present invention 3+ Nanoscale gadoli...

Claims

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Application Information

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IPC IPC(8): C09K11/78
CPCC09K11/7776
Inventor 王文志李金凯刘宗明
Owner UNIV OF JINAN
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