Manganese-doped orange germanium stannate long afterglow fluorescent powder and preparation method thereof

A long-lasting phosphor and manganese-doped technology, which is applied in chemical instruments and methods, luminescent materials, etc., can solve the problems of lack of red long-lasting materials doped with transition metals, and achieve environmental harmlessness, wide application, and preparation The effect of mild conditions

Inactive Publication Date: 2019-02-01
SOUTH CHINA UNIV OF TECH
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Problems solved by technology

Although rare earth doped red long afterglow materials have appeared, transition metal doped red long afterglow materials are still very scarce, so the development of new transition metal ion doped red long afterglow materials is very important for the development of long afterglow materials. very important

Method used

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  • Manganese-doped orange germanium stannate long afterglow fluorescent powder and preparation method thereof
  • Manganese-doped orange germanium stannate long afterglow fluorescent powder and preparation method thereof
  • Manganese-doped orange germanium stannate long afterglow fluorescent powder and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0029] Select sodium carbonate, calcium carbonate, tin dioxide, germanium dioxide, and manganese carbonate as starting compound raw materials, and weigh four kinds of compound raw materials respectively according to the molar ratio of each element, totally 10 groups, and the proportioning ratio is as follows:

[0030] (1) Na:Ca:Sn:Ge:O:Mn=2:1:2.0000:3:12:0.0000, corresponding to x=0.0%;

[0031] (2) Na:Ca:Sn:Ge:O:Mn=2:1:1.9999:3:12:0.0001, corresponding to x=0.01%;

[0032] (3) Na:Ca:Sn:Ge:O:Mn=2:1:1.9995:3:12:0.0005, corresponding to x=0.05%;

[0033] (4) Na:Ca:Sn:Ge:O:Mn=2:1:1.9990:3:12:0.0010, corresponding to x=0.10%;

[0034] (5) Na:Ca:Sn:Ge:O:Mn=2:1:1.9980:3:12:0.0020, corresponding to x=0.20%;

[0035] (6) Na:Ca:Sn:Ge:O:Mn=2:1:1.9970:3:12:0.0030, corresponding to x=0.30%;

[0036] (7) Na:Ca:Sn:Ge:O:Mn=2:1:1.9950:3:12:0.0050, corresponding to x=0.50%;

[0037] (8) Na:Ca:Sn:Ge:O:Mn=2:1:1.9900:3:12:0.0100, corresponding to x=1.00%;

[0038] (9) Na:Ca:Sn:Ge:O:Mn=2:1:1....

Embodiment 2

[0047] Select sodium carbonate, calcium carbonate, tin dioxide, germanium dioxide, and manganese carbonate as the starting compound raw materials, and weigh four kinds of compound raw materials respectively according to the molar ratio of each element, totally 5 groups, and the proportioning ratio is as follows:

[0048] (1) Na:Ca:Sn:Ge:O:Mn=2:1:2.0000:3:12:0.0000, corresponding to x=0.0%;

[0049] (2) Na:Ca:Sn:Ge:O:Mn=2:1:1.9995:3:12:0.0005, corresponding to x=0.05%;

[0050] (3) Na:Ca:Sn:Ge:O:Mn=2:1:1.9980:3:12:0.0020, corresponding to x=0.20%;

[0051] (4) Na:Ca:Sn:Ge:O:Mn=2:1:1.9950:3:12:0.0050, corresponding to x=0.50%;

[0052] (5) Na:Ca:Sn:Ge:O:Mn=2:1:1.9850:3:12:0.0150, corresponding to x=1.50%;

[0053] After the mixture is ground and mixed, put it into a corundum crucible, place the crucible in a corundum boat, and put it into a high-temperature box-type electric furnace. Strictly control the heating rate, under the air at the temperature T (T = 1000, 1050, 1100, ...

Embodiment 3

[0056] Choose sodium nitrate, calcium carbonate, tin dioxide, germanium dioxide, and manganese carbonate as starting compound raw materials, and take four kinds of compound raw materials respectively according to the molar ratio of each element, totally 2 groups, and the proportioning ratio is as follows:

[0057] (1) Na:Ca:Sn:Ge:O:Mn=2:1:1.9995:3:12:0.0005, corresponding to x=0.05%;

[0058] (2) Na:Ca:Sn:Ge:O:Mn=2:1:1.9980:3:12:0.0020, corresponding to x=0.20%;

[0059] After the mixture is ground and mixed, put it into a corundum crucible, place the crucible in a corundum boat, and put it into a high-temperature box-type electric furnace. The heating rate is strictly controlled, and the calcining time is t=5h at the temperature T (T=1100, 1150, 1200, 1250°C) under the air. After cooling down to room temperature with the furnace, grind to obtain manganese-doped orange germanium stannate long-lasting phosphor.

[0060] X-ray diffraction analysis showed that it was Na 2 CaSn...

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Abstract

The invention discloses a manganese-doped orange germanium stannate long afterglow fluorescent powder, which has a chemical general formula of Na2CaSn2-xGe3O12:xMn<2+>, wherein x is more than or equalto 0.01 and is less than or equal to 2.0%, Sn in the crystal is substituted with Mn, x represents a substitution rate, and the activation ion is Mn<2+>. The invention further discloses a preparationmethod of the manganese-doped orange germanium stannate long afterglow fluorescent powder. According to the present invention, the manganese-doped orange germanium stannate long afterglow fluorescentpowder has long afterglow emission in the range of 500-750 nm under the excitation of 254 nm ultraviolet light, and has an afterglow time of more than 20 s so as to achieve the conversion from ultraviolet light to orange red light; and the afterglow emission waveband of the fluorescent powder of the present invention is long compared with the commercial blue and green long afterglow materials so as to widen the application of the long-wavelength long-afterglow materials, and part of the waveband enters the first biological window (650-950 nm) so as to be expected to achieve biological applications.

Description

technical field [0001] The invention relates to the field of luminescent materials, in particular to a manganese-doped orange germanium stannate long-lasting phosphor and a preparation method thereof. Background technique [0002] Long afterglow materials, which refer to materials that can continue to emit light after the excitation light source stops, have attracted attention as an energy storage material. In the existing long afterglow research, more attention is paid to the blue and green parts. Now mature commercial long afterglow materials mainly include green long afterglow materials (SrAl 2 o 4 :Eu 2+ , Dy 3+ ) and blue long afterglow material (CaAl 2 o 4 :Eu 2+ ,Nd 3+ ). However, long-lasting materials with longer wavelengths, such as red long-lasting materials, are rarely reported. On the one hand, these bands can broaden the research of afterglow materials in longer bands, on the other hand, materials in these bands are urgently needed in practical applic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/66
CPCC09K11/66
Inventor 彭明营熊普先张鑫李学良
Owner SOUTH CHINA UNIV OF TECH
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