Dysprosium ion doped barium tantalum tungstate and preparation method and application thereof

A technology of barium tungstate tantalate and dysprosium ions, which is applied in the field of dysprosium ion-doped barium tungstate tantalate and its preparation, can solve the problems of unstable performance, complex preparation process, and insufficient luminous brightness of green phosphors, and achieve low production costs , High light conversion efficiency, good light absorption performance

Active Publication Date: 2017-06-13
NANJING TONGLI CRYSTAL MATERIALS RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The existing green phosphors have disadvantages such as insufficient luminous brightness, unstable performance and complicated preparation process.

Method used

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  • Dysprosium ion doped barium tantalum tungstate and preparation method and application thereof
  • Dysprosium ion doped barium tantalum tungstate and preparation method and application thereof
  • Dysprosium ion doped barium tantalum tungstate and preparation method and application thereof

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preparation example Construction

[0030] The preparation method of dysprosium ion-doped barium tungstate tantalate comprises:

[0031] (1) According to the chemical formula Ba 6-6x Dy 6x Ta 2 WO 14 The stoichiometric ratio of each element in the formula was weighed to contain barium ions (Ba 2 + ) compounds containing dysprosium ions (Dy 3+ ) compounds containing tantalum ions (Ta 5+ ) compounds and containing tungsten ions (W 6+ )compound of.

[0032] Among them, containing Ba 2+ The compound is selected from barium oxide (BaO), barium carbonate (BaCO 3 ) and barium nitrate Ba(NO 3 ) 2 One of. It can be understood that in the preparation of the dysprosium ion-doped barium tungstate tantalate, containing Ba 2+ The compound can use BaO alone, or BaCO alone 3 , you can also use Ba(NO 3 ) 2 . It can also be understood that containing Ba 2+ The compound can use BaO and BaCO 3 A mixture of BaO and Ba(NO 3 ) 2 A mixture of BaCO can also be used 3 and Ba(NO 3 ) 2 mixture. It can also be under...

Embodiment 1

[0044] According to the chemical formula Ba 5.4 Dy 0.6 Ta 2 WO 14 For the stoichiometric ratio of each element, weigh 2.6641g of BaCO 3 , 0.3010g of Dy 2 o 3 , 1.105g Ta 2 o 5 and 0.6339g of (NH 4 ) 10 W 12 o 41 . The above-mentioned various compounds are grinded for the first time and mixed uniformly to obtain a mixture. The obtained mixture was calcined for the first time in a muffle furnace, that is, in an air atmosphere, and calcined at a calcining temperature of 1100° C. and a calcining time of 1 h. Then, after natural cooling, the second grinding is carried out to obtain the pre-product. The pre-product was again placed in the muffle furnace for the second calcination, that is, calcination was performed under an air atmosphere at a calcination temperature of 1300° C. and a calcination time of 3 h. Then, it is ground for the third time after natural cooling again, and what is obtained after uniform grinding is dysprosium ion-doped barium tungsten tantalate. ...

Embodiment 2

[0054] According to the chemical formula Ba 5.994 Dy 0.006 Ta 2 WO 14 For the stoichiometric ratio of each element, weigh 2.2977g of BaO and 0.0068g of Dy(NO 3 ) 3 ·6H 2 O, 1.105g of Ta 2 o 5 and 0.5796g of WO 3 . The above-mentioned various compounds are grinded for the first time and mixed uniformly to obtain a mixture. The obtained mixture was calcined for the first time in a muffle furnace, that is, under an air atmosphere, and calcined at a calcining temperature of 600° C. and a calcining time of 15 h. Then, after natural cooling, the second grinding is carried out to obtain the pre-product. The pre-product was again placed in the muffle furnace for the second calcination, that is, calcination was performed under an air atmosphere at a calcination temperature of 1150° C. and a calcination time of 4 h. Then, it is ground for the third time after natural cooling again, and what is obtained after uniform grinding is dysprosium ion-doped barium tungsten tantalate. ...

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Abstract

The invention provides dysprosium ion doped barium tantalum tungstate and a preparation method and application thereof and relates to the field of inorganic luminescent material. The chemical formula of the dysprosium ion doped barium tantalum tungstate is Ba6-6xDy6xTa22O14, wherein x is less than or equal to 0.20 and greater than or equal to 0.001. The preparation method comprises the following steps: respectively fetching a compound containing Ba<2+>, a compound containing Dy<3+>, a compound containing Ta<5+> and a compound containing W<6+> according to a stoichiometric ratio of the elements in the chemical formula, carrying out first grinding and mixing to obtain a mixture; carrying out first calcining on the mixture and then carrying out secondary grinding to obtain a precursor; and carrying out secondary calcining on the precursor and finally carrying out third grinding. The product is applied in the preparation of green phosphor. The product has characteristics of high luminous intensity, high light conversion efficiency, stable material, etc., and is environment-friendly.

Description

technical field [0001] The invention relates to the field of inorganic luminescent materials, and in particular to dysprosium ion-doped barium tungstate tantalate and its preparation method and application. Background technique [0002] In the field of luminescence and display, rare earth ions play a very important role. Rare earth ions have a very rich 4f energy level structure. When rare earth ions are doped in the matrix material, due to the effect of the crystal field, the 4f energy level will be split. Electron transitions can occur between different energy levels to achieve light emission in various wavelength bands, including visible light emission and green light emission. [0003] The existing green fluorescent powder has the disadvantages of insufficient luminous brightness, unstable performance and complicated preparation process. Therefore, developing high-performance green phosphors to meet different application scenarios, and at the same time, improving the st...

Claims

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Application Information

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IPC IPC(8): C09K11/68
CPCC09K11/7751
Inventor 乔学斌聂新明
Owner NANJING TONGLI CRYSTAL MATERIALS RES INST CO LTD
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