Method for preparing SrZr03:Ce nanometer powder with composite coprecipitator

A nano-powder and co-precipitant technology, applied in the field of nano-powder preparation, can solve the problems of unsuitability for industrial production, high equipment requirements, low output, etc., and achieve the effect of short cycle, low raw material cost and good dispersion

Inactive Publication Date: 2012-06-13
SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The product of hydrothermal method has good dispersibility and high purity, but it require

Method used

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  • Method for preparing SrZr03:Ce nanometer powder with composite coprecipitator
  • Method for preparing SrZr03:Ce nanometer powder with composite coprecipitator
  • Method for preparing SrZr03:Ce nanometer powder with composite coprecipitator

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Put 0.471g Sr(NO 3 ) 2 , 0.704g ZrOCl 2 ·8H 2 O and 0.005gCe(NO 3 ) 3 Mix and dissolve in alcohol-water solution (the ratio of ethanol and water is 1:3), and make a metal salt solution with a concentration of 0.1mol / L. The concentration of ammonia water is 0.5mol / L, the concentration of ammonium bicarbonate is 0.3mol / L as the mixed precipitant, and the concentration of PAM (polyacrylamide) is 1.8×10 -3 mol·L is a dispersant. Drop the mixed precipitant and dispersant into the prepared metal salt solution successively, titrate at a rate of 3ml / min, until the pH=11~12, and stir with a magnetic stirrer. After the titration, aging for 2h, filter with distilled water Wash three times, detect the filtrate with silver nitrate until there is no chloride ion, wash twice with absolute ethanol, dry in a drying oven at 80°C for 24 hours, grind, pass through a 100-mesh sieve, and place in a muffle furnace Calcined at 1000°C for 2 hours and ball milled to obtain SrZr with a pri...

Embodiment 2

[0026] Put 0.979g Sr(NO 3 ) 2 , 1.349g ZrOCl 2 ·8H 2 O and 0.009gCe(NO 3 ) 3 Mix and dissolve in alcohol-water solution (the ratio of ethanol and water is 1:3), and make a metal salt solution with a concentration of 0.2mol / L. The concentration of ammonia water is 0.5mol / L, the concentration of ammonium bicarbonate is 0.3mol / L as the mixed precipitant, and the concentration of PAM (polyacrylamide) is 1.8×10 -3 mol·L is a dispersant. Drop the mixed precipitant and dispersant into the prepared metal salt solution successively, the titration speed is 3ml / min, until the pH=11~12, and stir with a magnetic stirrer. Wash three times, detect the filtrate with silver nitrate until there is no chloride ion, wash twice with absolute ethanol, dry in a drying oven at 80°C for 24 hours, grind, pass through a 100-mesh sieve, and place in a muffle furnace Calcined at 1000°C for 2h and ball milled to obtain SrZr with a particle size of about 50nm, nearly spherical shape and good dispersi...

Embodiment 3

[0028] Put 1.539g Sr(NO 3 ) 2 , 1.918g ZrOCl 2 ·8H 2 O and 0.014gCe(NO 3 ) 3 Mix and dissolve in alcohol-water solution (the ratio of ethanol and water is 1:3), and make a metal salt solution with a concentration of 0.3mol / L. The concentration of ammonia water is 0.5mol / L, the concentration of ammonium bicarbonate is 0.3mol / L as the mixed precipitant, and the concentration of PAM (polyacrylamide) is 1.8×10 -3 mol·L is a dispersant. Drop the mixed precipitant and dispersant into the prepared metal salt solution successively, the titration speed is 3ml / min, until the pH=11~12, and stir with a magnetic stirrer. Wash three times, detect the filtrate with silver nitrate until there is no chloride ion, wash twice with absolute ethanol, dry in a drying oven at 80°C for 24 hours, grind, pass through a 100-mesh sieve, and place in a muffle furnace Calcined at 1000°C for 2h and ball milled to obtain SrZr with a particle size of about 55nm, nearly spherical shape and good dispersi...

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Abstract

A method for preparing SrZr03:Ce nanometer powder with a composite coprecipitator relates to a blue fluorescent powder preparing method. Sr(NO3)2, ZrOC12 8H20 and CE(NO3)3 which are weighed according to accurate stoichiometric ratio are dissolved in alcohol-water solution to be mixed into metal salt solution with 0.01-1 ml/L concentration. Ammonia water with 0.1-1 mol/L concentration and ammonium bicarbonate with 0.1-0.5 mol/L concentration are adopted to serve as mixed precipitator, and polyacrylamide (PAM) with 0.1-5*10-3mol/L is adopted to serve as dispersing agent. The mixed precipitator and the PAM dispersing agent are added into the metal salt solution dropwise, precursor precipitate is obtained, and samples are obtained after aging, filtering, washing, grinding, screening, calcining and ball-milling. SrZr03:Ce nanometer powder obtained through the method is good in dispersity, and average primary particle size is about 50 nm. In addition, the method for preparing SrZr03:Ce nanometer powder with the composite coprecipitator is simple in preparing process, short in period, low in cost and suitable for massive production.

Description

technical field [0001] The present invention relates to a preparation method of blue fluorescent powder, in particular to a scintillation ceramic material SrZrO 3 : The preparation method of the nanopowder of Ce. Background technique [0002] Scintillators are important photofunctional materials, mainly used in high-energy physics and nuclear medical imaging, including inorganic scintillation crystals and inorganic scintillation ceramics. In recent years, metal compound material systems with a perovskite structure have attracted extensive attention from scholars at home and abroad. (Sr;Ba;Ca)HfO 3 :Ce and (Sr:Ba;Ca)ZrO 3 There are different reports on Ce as a scintillation material. The goal is to solve the problems of synthesis and preparation technology of ceramic scintillation materials, and become one of the research hotspots in the field of new materials. Alkaline earth SrZrO 3 As a perovskite structure compound, the density is high (5.42 g / cm 3 ), large atomi...

Claims

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Application Information

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IPC IPC(8): C04B35/48C04B35/622
Inventor 马伟民滕飞马雷吴南朱红艳
Owner SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
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