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A kind of green rare earth phosphor for LED and preparation method thereof

A rare-earth phosphor and green technology, which is applied in the field of green rare-earth phosphor for LED and its preparation, can solve the problems of high preparation temperature and low luminous intensity, and achieve the effects of low preparation temperature, high luminous intensity and good crystal development

Active Publication Date: 2017-01-11
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Especially now that we have entered the information age, the development of luminescent materials that meet various information display requirements is particularly rapid in high-tech fields such as communications, satellites, radars, displays, records, computers, and biomolecular probes; The preparation temperature of rare earth phosphor is high, and the luminous intensity is low

Method used

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  • A kind of green rare earth phosphor for LED and preparation method thereof
  • A kind of green rare earth phosphor for LED and preparation method thereof

Examples

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Effect test

Embodiment 1

[0027] 1) Select the commercially available purity as analytically pure Na 2 CO 3 and ZrO 2 And the purity is high purity reagent La 2 o 3 and Tb 4 o 7 As a reaction raw material, according to the chemical formula NaLa 0.95 Zr 2 o 6 : 0.05Tb 3+ The stoichiometric ratio is weighed, wherein, considering that the Na source will be partially burned at high temperature, so when weighing Na 2 CO 3 Weigh 1.5 times of its stoichiometric ratio;

[0028] 2) Put the raw materials weighed in step 1) into a conical ball mill for full grinding and mixing, control the output particle size at 0.08mm, and put the uniformly mixed material powder into an oven at 80°C for 2 hours to dry.

[0029] 3) Put the dried material powder in step 2) into a corundum crucible, place the corundum crucible in a muffle furnace, and raise it to 200°C at a rate of 2°C / min from room temperature in an air atmosphere. Then raise the temperature to 500°C at a rate of 3°C / min, and then raise the temperatur...

Embodiment 2

[0031] 1) Select the commercially available purity as analytically pure Na 2 CO 3 and ZrO 2 And the purity is high purity reagent La 2 o 3 and Tb 4 o 7 As a reaction raw material, according to the chemical formula NaLa 0.93 Zr 2 o 6 : 0.07Tb 3+ The stoichiometric ratio is weighed, wherein, considering that the Na source will be partially burned at high temperature, so when weighing Na 2 CO 3 Weigh 1.5 times of its stoichiometric ratio;

[0032] 2) Put the raw materials weighed in step 1) into a conical ball mill for full grinding and mixing, and control the output particle size at 0.2mm. And put the uniformly mixed material powder into an oven at 100°C to dry for 2 hours.

[0033]3) Put the dried material powder in step 2) into a corundum crucible, place the corundum crucible in a muffle furnace, and raise it to 200°C at a rate of 2°C / min from room temperature in an air atmosphere. Then raise the temperature to 500°C at a rate of 3°C / min, then raise the temperatur...

Embodiment 3

[0035] 1) Select the commercially available purity as analytically pure Na 2 CO 3 and ZrO 2 And the purity is high purity reagent La 2 o 3 and Tb 4 o 7 As a reaction raw material, according to the chemical formula NaLa 0.91 Zr 2 o 6 : 0.09Tb 3+ The stoichiometric ratio is weighed, wherein, considering that the Na source will be partially burned at high temperature, so when weighing Na 2 CO 3 Weigh 1.5 times of its stoichiometric ratio;

[0036] 2) Put the raw materials weighed in step 1) into a conical ball mill for full grinding and mixing, control the output particle size at 0.08-0.2mm, and put the evenly mixed material powder into an oven at 90°C for 3 hours to dry.

[0037] 3) Put the dried material powder in step 2) into a corundum crucible, place the corundum crucible in a muffle furnace, and raise it to 200°C at a rate of 2°C / min from room temperature in an air atmosphere. After that, it was raised to 500°C at a rate of 3°C / min, and then raised to 1380°C at ...

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Abstract

The invention discloses green rare-earth fluorescent powder for an LED (Light Emitting Diode) and a preparation method of the fluorescent powder. According to the preparation method, a high-temperature solid-phase method is adopted, and the method specifically comprises the step of weighing reaction raw materials, i.e., a Na<+> containing compound, a La<3+> containing compound, a Zr<4+> containing compound and a Tb<3+> containing compound, according to the stoichiometric proportion of a chemical formula NaLa<1-x>Zr<2>O<6>:xTb<3+>, wherein x ranges from 0.05 to 0.11. According to the invention, green light emission is realized through rare-earth single-doping; and the NaLa<1-x>Zr<2>O<6>:xTb<3+> fluorescent powder is synthesized by adopting the high-temperature solid-phase method. Moreover, the process is simple, and the synthesis temperature is low.

Description

technical field [0001] The invention relates to a fluorescent powder and a preparation method thereof, in particular to a green rare earth fluorescent powder for LEDs and a preparation method thereof. Background technique [0002] Luminescent materials are a class of functional materials that can convert absorbed energy (such as ultraviolet rays, X-rays, electron bombardment, friction, or some other excitation methods) into light radiation. Luminescent materials are widely used in special display, marking, night coating, night emergency lighting, plastic industry, etc. field. Especially now that we have entered the information age, the development of luminescent materials that meet various information display requirements is particularly rapid in high-tech fields such as communications, satellites, radars, displays, records, computers, and biomolecular probes; The preparation temperature of rare earth phosphor is relatively high, and the luminous intensity is relatively lo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/78
Inventor 史永胜陈思秋宁青菊曹舒尧
Owner SHAANXI UNIV OF SCI & TECH
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