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Preparation method of manganese-base fluorescent powder

A fluorescent powder and manganese-based technology, applied in chemical instruments and methods, luminescent materials, etc., can solve the problems of complicated preparation process and unfavorable display of white light LED, and achieve the effect of low cost and improved display

Active Publication Date: 2015-05-27
CHONGQING UNIV OF ARTS & SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are two obvious problems in the existing preparation methods of manganese-based phosphors: one is that during the preparation process, it is necessary to synthesize the precursor K 2 MnF 6 , while K 2 MnF 6 The preparation process is more complicated; the second is that the emission spectra of its products are all red peaks, which is unfavorable for improving the display of white LEDs

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  • Preparation method of manganese-base fluorescent powder

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Embodiment 1

[0029] A preparation method of manganese-based fluorescent powder, which is specifically carried out according to the following steps:

[0030] (1) Under normal temperature and pressure conditions, the KMnO 4 , KF is first added to the HF solution, after stirring evenly, add H 2 o 2 Carry out the reaction, and after the reaction is completed, filter with suction, wash with methanol, and dry to obtain the precursor K 2 MnF 5 ·H 2 O; in this step (1), the consumption of each material is KMnO according to molar ratio 4 :KF:H 2 o 2 :HF=1:2:4:200 for configuration;

[0031] (2) The precursor K 2 MnF 5 ·H 2 O, K 2 TiF 6 , KMnO 4, KF is added in the HF solution, stirred evenly and reacted for 40 h, and finally through suction filtration, washed with methanol, and dried; in this step (2), the consumption of each material is K according to the molar ratio 2 MnF 5 ·H 2 O:K 2 TiF 6 : KMnO 4 :KF:HF=1:20:5:5:500 to configure.

[0032] The principle of its preparation re...

Embodiment 2

[0038] A preparation method of manganese-based fluorescent powder, which is specifically carried out according to the following steps:

[0039] (1) Under normal temperature and pressure conditions, the KMnO 4 , KF is first added to the HF solution, after stirring evenly, add H 2 o 2 Carry out the reaction, and after the reaction is completed, filter with suction, wash with ethanol, and dry to obtain the precursor K 2 MnF 5 ·H 2 O; in this step (1), the consumption of each material is KMnO according to molar ratio 4 :KF:H 2 o 2 :HF=1:0.2:2:100 for configuration;

[0040] (2) The precursor K 2 MnF 5 ·H 2 O, K 2 TiF 6 , KMnO 4 , KF is added in the HF solution, stirred evenly and reacted for 10 h, and finally through suction filtration, washed with ethanol, and dried; in this step (2), the consumption of each material is K according to the molar ratio 2 MnF 5 ·H 2 O:K 2 TiF 6 : KMnO 4 :KF:HF=1:0.1:0.5:0.5:100 to configure.

[0041] combined with Figure 5 , 6...

Embodiment

[0043] A preparation method of manganese-based fluorescent powder, which is specifically carried out according to the following steps:

[0044] (1) Under normal temperature and pressure conditions, the KMnO 4 , KF is first added to the HF solution, after stirring evenly, add H 2 o 2 Carry out the reaction, and after the reaction is completed, filter with suction, wash with acetone, and dry to obtain the precursor K 2 MnF 5 ·H 2 O; in this step (1), the consumption of each material is KMnO according to molar ratio 4 :KF:H 2 o 2 :HF=1:1:2:300 for configuration;

[0045] (2) The precursor K 2 MnF 5 ·H 2 O, K 2 TiF 6 , KMnO 4 , KF is added in the HF solution, stirred evenly and reacted for 1 h, and finally through suction filtration, washed with acetone, and dried; in this step (2), the consumption of each material is K according to the molar ratio 2 MnF 5 ·H 2 O:K 2 TiF 6 : KMnO 4 :KF:HF=1:10:4:4:500 to configure.

[0046] combined with Figure 8 , 9 And the...

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Abstract

The invention relates to a preparation method of manganese-base fluorescent powder. The reaction is carried out on the raw material KMnO4 by using MeXTiF6 as a matrix and HF as a solvent in the presence of a ligand provider and a reducer, wherein Me can be K, Na, Li, Ca, Mg or other ions, and X is correspondingly 2-1. The preparation method has the advantages of high speed, great convenience, low cost and the like, and can prepare the manganese-base fluorescent powder, of which the emission spectrum is red broad peak, under the conditions of normal temperature and pressure.

Description

technical field [0001] The invention relates to the technical field of luminescent materials, in particular to a preparation method of manganese-based fluorescent powder. Background technique [0002] At present, the mainstream technical solution of white LED lighting is to package the blue light chip and yellow phosphor, and combine the yellow light generated by the chip to excite the phosphor and the blue light emitted by the chip to form a composite white light. However, the existing yellow phosphor lacks red light in its emission spectrum, making it difficult to prepare white LED lamp beads with high color rendering and warm color temperature, which cannot meet the requirements of high-quality modern lighting. [0003] Current, Ca(Sr,Ba) 2 Si 5 N 8 :Eu, CaAlSiN 3 Nitride red phosphors such as :Eu have been widely studied and applied to the packaging of white LEDs with high color rendering and warm color temperature. However, the preparation of these nitride red phos...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/67
CPCC09K11/616C09K11/675
Inventor 韩涛彭玲玲王俊涂铭旌
Owner CHONGQING UNIV OF ARTS & SCI
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