(SrxCay)0.97TiO3:Eu3+0.03 fluorescent powder and preparing method thereof

A phosphor and solution technology, applied in chemical instruments and methods, luminescent materials, etc., can solve problems such as unfavorable mass production, inability to observe the reaction process in hydrothermal synthesis, and poor experimental repeatability, and achieve improved luminous intensity, crystallinity, etc. Small particle size and good chemical stability

Inactive Publication Date: 2015-11-11
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, hydrothermal synthesis cannot observe the reaction process, and the repeatability of the experiment is not good, which is not conducive to industrial mass production

Method used

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  • (SrxCay)0.97TiO3:Eu3+0.03 fluorescent powder and preparing method thereof
  • (SrxCay)0.97TiO3:Eu3+0.03 fluorescent powder and preparing method thereof
  • (SrxCay)0.97TiO3:Eu3+0.03 fluorescent powder and preparing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Weigh 0.3152g of oxalic acid dihydrate and dissolve it in 10ml of absolute ethanol to obtain a clear solution A, weigh 0.3523g of ammonium oxalate and dissolve it in 70ml of deionized water to obtain a clear solution B, dissolve 1ml of tetrabutyl titanate in 10ml of To obtain a clear solution C in absolute ethanol, weigh 0.5048g of calcium nitrate tetrahydrate, 0.0503g of strontium nitrate, and 0.0388g of europium nitrate hexahydrate, and dissolve them in 50ml of deionized water to obtain a clear solution D; put solutions A and B drop by drop in order Add solution C, and control the pH between 2.5-3, stir continuously to obtain clear solution E, add D dropwise to E, control the magneton speed to 2400rpm, stir and react for 2 hours, the obtained precipitate; Wash twice with water, once with 5mol / L hydrochloric acid, and once with absolute ethanol; the speed of centrifugation is 5000r / min, and the time is controlled at 5min; dry for 12h to obtain the precipitated product. ...

Embodiment 2

[0027] Weigh 0.3152g of oxalic acid dihydrate and dissolve it in 10ml of absolute ethanol to obtain a clear solution A, weigh 0.3523g of ammonium oxalate and dissolve it in 70ml of deionized water to obtain a clear solution B, dissolve 1ml of tetrabutyl titanate in 10ml of To obtain a clear solution C in absolute ethanol, weigh 0.3926g of calcium nitrate tetrahydrate, 0.1509g of strontium nitrate, and 0.0388g of europium nitrate hexahydrate, and dissolve them in 50ml of deionized water to obtain a clear solution D; put solutions A and B drop by drop in order Add solution C, and control the pH between 2.5-3, stir continuously to obtain clear solution E, add D dropwise to E, control the magneton speed to 2400rpm, stir and react for 2 hours, the obtained precipitate; Wash twice with water, once with 5mol / L hydrochloric acid, and once with absolute ethanol; the speed of centrifugation is 5000r / min, and the time is controlled at 5min; dry for 12h to obtain the precipitated product. ...

Embodiment 3

[0029] Weigh 0.3152g of oxalic acid dihydrate and dissolve it in 10ml of absolute ethanol to obtain a clear solution A, weigh 0.3523g of ammonium oxalate and dissolve it in 70ml of deionized water to obtain a clear solution B, dissolve 1ml of tetrabutyl titanate in 10ml of To obtain a clear solution C in absolute ethanol, weigh 0.5048g of calcium nitrate tetrahydrate, 0.0503g of strontium nitrate, and 0.0388g of europium nitrate hexahydrate, and dissolve them in 50ml of deionized water to obtain a clear solution D; put solutions A and B drop by drop in order Add solution C, and control the pH between 2.5-3, stir continuously to obtain clear solution E, add D dropwise to E, control the magneton speed to 2400rpm, stir and react for 2 hours, the obtained precipitate; Wash twice with water, once with 5mol / L hydrochloric acid, and once with absolute ethanol; the speed of centrifugation is 5000r / min, and the time is controlled at 5min; dry for 12h to obtain the precipitated product. ...

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Abstract

The invention relates to (SrxCay)0.97TiO3:Eu3+0.03 fluorescent powder and a preparing method thereof. The preparing method comprises the steps that oxalate dehydrate is dissolved in ethyl alcohol to obtain a solution A; ammonium oxalate is dissolved in water to obtain a solution B; tetrabutyl titanate is dissolved in ethyl alcohol to obtain a solution C; strontium nitrate, calcium nitrate and europium nitrate are dissolved in deionized water to obtain a settled solution D; the solution A and the solution B are added to the solution C in sequence to be stirred to obtain a solution E, then the solution D is added to the solution E dropwise to be stirred for reaction for 1-2 h, sediment is obtained, and then washing, drying and roasting are conducted to obtain the fluorescent powder. The obtained fluorescent powder is high in chemical stability, small in grain size, pure in crystalline phase, and high in stability and light intensity. Roasting temperature is low, energy consumption is low, and production equipment is simple.

Description

technical field [0001] The invention belongs to the field of fluorescent powder and its preparation, in particular to a kind of (Sr x Ca y ) 0.97 TiO 3 : Eu 3+ 0.03 Phosphor powder and its preparation method. Background technique [0002] In 1996, Japan's Nichia Chemical Corporation first developed a highly efficient white light source using InGaN as a blue chip to excite YAG phosphors, and white light LEDs have received a lot of research. LED is called the fourth-generation light source, which has the characteristics of energy saving, environmental protection, safety, long life, low power consumption, low heat, high brightness, etc., and can be widely used in various indications, displays, decorations, backlights, general lighting and other fields . At present, the main method of obtaining white LED is that the blue LED chip excites YAG: Ce 3+ Yellow phosphor, but the white light obtained by this method appears cool due to the lack of red wavelength light. For this...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/67
Inventor 王海风吴新宇庆健张亚飞
Owner DONGHUA UNIV
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