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Method for preparing novel Mn (IV) ion activated red luminescence material

A red light-emitting, ion technology, applied in the direction of light-emitting materials, chemical instruments and methods, can solve the problems of fluoride toxicity, limited application prospects, etc., to achieve the effect of high luminous efficiency

Inactive Publication Date: 2017-02-22
YUNNAN MINZU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Mn(IV) ion-activated fluoride red-emitting materials will use a large amount of hydrofluoric acid in the preparation process, and fluoride has certain toxicity, which limits their application prospects.

Method used

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  • Method for preparing novel Mn (IV) ion activated red luminescence material
  • Method for preparing novel Mn (IV) ion activated red luminescence material
  • Method for preparing novel Mn (IV) ion activated red luminescence material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Mix 1.9734 g of barium carbonate, 4.0976 g of germanium dioxide, and 0.0522 g of manganese dioxide in an agate mortar, then pre-calcine in a high-temperature muffle furnace at 600 ° C for 4 hours, and finally calcined at 1200 ° C for 4 hours, The obtained white powder is the final product.

[0013] The XRD diffraction pattern of this fluorescent powder is attached figure 1 shown, with the standard card JCPDS 43-0644 (BaGe 4 o 9 ) in contrast, the two are completely consistent, and no diffraction peaks of any heterogeneous phases are observed, which indicates that the samples we synthesized have a single crystal phase.

[0014] attached figure 2 Shown are the room temperature excitation spectrum (monitored at 667 nm) and emission spectrum (excited at 430 nm) of the sample. The sample has strong broadband excitation in the ultraviolet light region (240 nm ~ 380 nm) and blue light region (400 nm ~ 500 nm). Under the excitation of 430 nm light, the emission of the sam...

Embodiment 2

[0017] Mix 1.7761 g of barium carbonate, 0.1000 g of calcium carbonate, 4.0976 g of germanium dioxide, and 0.0348 g of manganese dioxide in an agate mortar, then pre-fire in a high-temperature muffle furnace at 600 °C for 4 hours, and finally at 1300 °C Lower calcining for 4 hours, the white powder obtained is the final product.

Embodiment 3

[0019] Mix 1.9734 g of barium carbonate, 3.6879 g of germanium dioxide, 0.3200 g of titanium dioxide, and 0.0522 g of manganese dioxide in an agate mortar, then pre-fire in a high-temperature muffle furnace at 600 °C for 4 hours, and finally at 1400 °C Calcined for 6 hours, the obtained white powder was the final product.

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Abstract

The invention relates to the field of white light emitting diodes, and discloses a method for preparing a novel Mn (IV) ion activated red luminescence material. The novel Mn (IV) ion activated red luminescence material disclosed by the invention has the chemical composition of AB4-xO9:xMn<4+>, wherein A refers to one or more of alkaline-earth metals ions such as Ba<2+>, Ca<2+> and Mg<2+>; B refers to one or more of alkaline-earth metals ions such as Ge<4+>, Ti<4+> and Zr<4+>; x refers to a molar percentage coefficient of correspondingly doped Mn<4+> relative to B<4+>; x is more than 0 and less than or equal to 0.10. The red luminescence material disclosed by the invention has the principle red emission of 667nm under blue light excitation and has high luminous efficiency. The novel Mn (IV) ion activated red luminescence material disclosed by the invention is prepared by a high temperature solid state method.

Description

technical field [0001] The invention relates to a preparation method of a novel red luminescent material activated by Mn(IV) ions, in particular, a red luminescent material which can be excited by blue light and a preparation method thereof. It belongs to the field of preparation of inorganic functional materials. Background technique [0002] Mn(IV) ion is an efficient luminescent center, and thus is widely used in some inorganic red luminescent materials. These red luminescent materials activated by Mn(IV) ions can be used in lighting, optical storage and other fields. The current red light-emitting materials activated by Mn(IV) ions mainly include two categories: fluoride red light materials and composite oxide red light materials. Fluoride red light materials activated by Mn(IV) ions will use a large amount of hydrofluoric acid in the preparation process, and fluoride has certain toxicity, which limits their application prospects. Mn(IV) ion-activated composite oxides...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/66C09K11/67
Inventor 汪正良刘永周亚运周强谭慧英张秋函苏长伟郭俊明
Owner YUNNAN MINZU UNIV
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