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Ce, Tb and Mn-coactivated single-matrix phosphate white phosphor powder and preparation method thereof

A single-matrix, phosphate technology, applied in the field of materials science, can solve the problems of difficult confirmation of phase and structure, high temperature for white light phosphor preparation, etc.

Inactive Publication Date: 2015-11-11
SHANGHAI INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the above-mentioned technical problems in the prior art, the present invention provides a cerium, terbium, and manganese co-activated single-matrix phosphate white light phosphor and a preparation method thereof. The said cerium, terbium, and manganese co-activated single-matrix Phosphate white light phosphor and its preparation method solve the technical problems of high preparation temperature and difficult confirmation of phase and structure of white light phosphor in the prior art

Method used

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  • Ce, Tb and Mn-coactivated single-matrix phosphate white phosphor powder and preparation method thereof
  • Ce, Tb and Mn-coactivated single-matrix phosphate white phosphor powder and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Preparation of Ba 1.92 Mg(PO 4 ) 2 :0.04Ce 3+ ,0.01Tb 3+ ,0.01Mn 2+ .

[0016] Weigh 2.0668g of barium carbonate, 0.5411g of basic magnesium carbonate, 0.0767g of cerium oxide, 0.0208g of terbium oxide, 0.0128g of manganese carbonate, and 1.2817g of ammonium dihydrogen phosphate, grind and mix them in a mortar for 120min, then add alcohol and grind for 60min to obtain The mixture, the mixture was put into a crucible boat and placed in a tube furnace with two temperature zones, calcined at 1100° C. for 5 hours under an aluminum reducing atmosphere, cooled naturally and ground into powder.

Embodiment 2

[0018] Preparation of Ba 1.74 Mg(PO 4 ) 2 :0.04Ce 3+ ,0.03Tb 3+ ,0.06Mn 2+ .

[0019] Weigh 1.9193g of barium carbonate, 0.5429g of basic magnesium carbonate, 0.1458g of cerium nitrate, 0.0289g of terbium nitrate, 0.0771g of manganese carbonate, and 1.2859g of ammonium dihydrogen phosphate, grind and mix in a mortar for 120min, then add alcohol and grind for 60min The obtained mixture was put into a crucible boat and placed in a double temperature zone tube furnace, calcined at 1100° C. for 5 hours under an aluminum reducing atmosphere, cooled naturally and ground into powder.

Embodiment 3

[0021] Preparation of Ba 1.72 Mg(PO 4 ) 2 :0.2Ce 3+ , 0.1Tb 3+ , 0.3Mn 2+ .

[0022] Weigh 0.9564g of barium carbonate, 0.5884g of basic magnesium carbonate, 0.4171g of cerium oxide, 0.2265g of terbium oxide, 0.4178g of manganese carbonate, and 1.3937g of ammonium dihydrogen phosphate, grind and mix in a mortar for 120min, then add acetone and grind for 10min After the mixture is obtained, the mixture is put into a crucible boat and placed in a double temperature zone tube furnace, calcined at 1000° C. for 10 hours under an aluminum reducing atmosphere, cooled naturally and ground into powder.

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Abstract

The invention discloses Ce, Tb and Mn-coactivated single-matrix phosphate white phosphor powder. A general formula of the Ce, Tb and Mn-coactivated single-matrix phosphate white phosphor powder is Ba2(1-x-y-z)Mg(PO4)2: xCe<3+>, yTb<3+>, zMn<2+>, wherein x is greater than 0 and is smaller than or equal to 0.2, y is greater than 0 and is smaller than or equal to 0.2, and z is greater than 0 and is smaller than or equal to 0.4. The invention also discloses a preparation method of the white phosphor powder. The preparation method comprises the following steps: uniformly mixing carbonates and ammonium dihydrogen phosphates corresponding to Ba, Mg and Mn with oxides or nitrates of Ce and Tb according to a stoichiometric ratio, and performing grinding to obtain a mixture; putting the mixture into a crucible boat, and placing the crucible boat into a double-temperature-zone tubular furnace quartz tube; calcining the mixture at a high temperature by using aluminum powder as a reducing agent, and cooling and grinding the mixture into powder namely the single-matrix phosphate white phosphor powder. Under the ultraviolet excitation, the phosphor powder emits white light composed of 380nm of blue light, 550nm of green light and 600nm of red light by regulating the concentrations of doped Ce, Tb and Mn ions.

Description

technical field [0001] The invention belongs to the field of materials science, and relates to a rare earth luminescent material, specifically a cerium, terbium and manganese co-activated single-matrix phosphate white light phosphor and a preparation method thereof. Background technique [0002] White light-emitting diodes (WLEDs) have broad application prospects in the field of lighting and display due to their remarkable advantages such as long life, low energy consumption, no pollution, high efficiency, and small size, and are called a new generation of lighting sources. [0003] At present, the preparation scheme of using ultraviolet-near-ultraviolet chips to excite three primary color phosphors to realize white light has become the focus of the current WLEDs industry development. Due to the insensitivity of vision to ultraviolet-near ultraviolet light, the color of this type of white light LED is only determined by phosphor powder. low-level disadvantages. However, du...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/71
CPCY02B20/00
Inventor 房永征刘启会刘玉峰张娜侯京山
Owner SHANGHAI INST OF TECH
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