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Method for preparing cubic shape green luminescent material of lanthanum zirconate doped with cerium and terbium

A luminescent material, lanthanum zirconate technology, applied in luminescent materials, chemical instruments and methods, etc., can solve the problems of single research and less hydrothermal synthesis, and achieve the effect of lowering the synthesis temperature

Inactive Publication Date: 2010-01-20
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

So far, there are relatively few studies on lanthanum zirconate as a luminescent material matrix, and the research on its preparation is relatively single, mainly based on sol-gel method [AiyuZhang, et al, Systematic research on RE 2 Zr 2 O7 (RE=La, Nd, Eu and Y) nanocrystals: Preparation, structure and photoluminescence characterization, Solid State Sciences, 10(2008) 74-81], hydrothermal synthesis is relatively rare

Method used

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  • Method for preparing cubic shape green luminescent material of lanthanum zirconate doped with cerium and terbium
  • Method for preparing cubic shape green luminescent material of lanthanum zirconate doped with cerium and terbium
  • Method for preparing cubic shape green luminescent material of lanthanum zirconate doped with cerium and terbium

Examples

Experimental program
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Effect test

Embodiment 1

[0020] Get 1.1691 grams of lanthanum nitrate (La(NO 3 ) 3 ·6H 2 O), 0.0651 grams of cerium nitrate (Ce(NO 3 ) 3 ·6H 2 O), 0.068 grams of terbium nitrate (Tb(NO 3 ) 3 ·6H 2 O) be dissolved in 40 milliliters of deionized water, the molar concentration of lanthanum nitrate, cerium nitrate, terbium nitrate is respectively 0.0675 mole / liter, 0.0038 mole / liter, 0.0038 mole / liter; Add PVP (polyvinylpyrrolidone K30) in above-mentioned solution 0.1 g, the mass percent concentration of PVP is 0.25%, and stirred. Get 0.465 milliliters of zirconium acetate (Qingda Fine Chemical Industry, Yutai County) and dissolve in 40 milliliters of deionized water, the molar concentration of zirconium acetate is 0.079 mol / liter, add 40 milliliters of zirconium acetate solution dropwise to above-mentioned nitrate mixed solution, stir. Sodium hydroxide was added dropwise to the above mixed solution under stirring until no white precipitate was formed. The pH of the solution was adjusted to 6, an...

Embodiment 2

[0022] Get 1.5761 grams of lanthanum nitrate (La(NO 3 ) 3 ·6H 2 O), 0.01736 grams of cerium nitrate (Ce(NO 3 ) 3 ·6H 2 O), 0.1450 grams of terbium nitrate (Tb(NO 3 ) 3 ·6H 2 O) be dissolved in 40 milliliters of deionized water, lanthanum nitrate, cerium nitrate, terbium nitrate molar concentration are respectively 0.1 mole / liter, 0.001 mole / liter, 0.008 mole / liter; Add PVP (polyvinylpyrrolidone K30) 0.2 in the above-mentioned solution gram, the mass percent concentration of PVP is 0.5%, and stirred. Get 0.66 milliliters of zirconium acetate (Qingda Fine Chemical Industry Co., Ltd., Yutai County) and dissolve it in 40 milliliters of deionized water. The molar concentration of zirconium acetate is 0.113 mol / liter. Add 40 milliliters of zirconium acetate solution to the above-mentioned nitrate mixed solution dropwise, and stir. Sodium hydroxide was added dropwise to the above mixed solution under stirring until no white precipitate was formed. The pH of the solution was ...

Embodiment 3

[0024] Get 3.464 grams of lanthanum nitrate (La(NO 3 ) 3 ·6H 2 O), 0.0771 grams of cerium nitrate (Ce(NO 3 ) 3 ·6H 2 O), 0.3221 grams of terbium nitrate (Tb(NO 3 ) 3 ·6H 2 O) be dissolved in 40 milliliters of deionized water, the molar concentrations of lanthanum nitrate, cerium nitrate, and terbium nitrate are respectively 0.2 mol / liter, 0.004 mol / liter, 0.017 mol / liter; in the above-mentioned solution, add PVP (polyvinylpyrrolidone K30) 0.4 gram, the mass percent concentration of PVP is 1%, and stirred. Get 1.32 milliliters of zirconium acetate (Yutai Qingda Fine Chemicals) and dissolve it in 40 milliliters of deionized water, the molar concentration of zirconium acetate is 0.225 mol / liter, add 40 milliliters of zirconium acetate solution to the above-mentioned nitrate mixed solution dropwise, and stir. Sodium hydroxide was added dropwise to the above mixed solution under stirring until no white precipitate was formed. The pH of the solution was adjusted to 9, and s...

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Abstract

The invention discloses a method for preparing a cubic shape green luminescent material of lanthanum zirconate doped with cerium and terbium. The method comprises the following steps: dissolving lanthanum nitrate, cerium nitrate and terbium nitrate in deionized water according to the mole ratio and stirring; adding PVP into the solution, controlling the concentration of the mass percent of the PVP at 0.25-1% and stirring; adding zirconium acetate into the solution, controlling the mole number of the zirconium acetate and the mole number of the total rare earth cation to be equivalent, adding a sodium hydroxide solution drops by drops to obtain a white precipitate and controlling the pH value of the solution at 6-9; putting the solution into a high-pressure kettle, taking the filling degree at 80% and processing for 6-40 hours at 180-220 DEG C; and centrifugalizing and drying the processed solution to obtain the cubic shape green luminescent material of lanthanum zirconate doped with cerium and the terbium.

Description

technical field [0001] The invention relates to a preparation method of a cubic lanthanum zirconate-doped cerium-terbium green luminescent material. Background technique [0002] Rare earth zirconates (Re 2 Zr 2 o 7 ) is very versatile and has many unique properties, such as lanthanum zirconate as a functional material with high melting point, high ion conductivity, high chemical stability, high catalytic activity, etc. [0003] As a thermal barrier coating, lanthanum zirconate has been widely studied due to a series of advantages such as very low thermal conductivity, high chemical stability, and thermal expansion properties comparable to yttria-stabilized zirconia ceramics. For example, the use of this thermal barrier coating for gas turbines can increase its operating temperature, increase engine thrust, reduce fuel consumption, prolong life, simplify design complexity, and reduce requirements for base materials. Lanthanum zirconate is also a good catalyst and is wide...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/78
Inventor 高林辉安越祝洪良金达莱王耐艳姚奎鸿陈建军杜平凡王龙成
Owner ZHEJIANG SCI-TECH UNIV
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