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A kind of cerium lanthanum doped barium fluoride transparent ceramic and preparation method thereof

A technology of transparent ceramics and barium fluoride, which is applied in the field of cerium-lanthanum doped barium fluoride transparent ceramics and its preparation, can solve the problems of transparent ceramics application difficulties, increase the difficulty of preparation, increase the process, etc., and achieve the suppression of concentration quenching effect, The effect of low cost and narrow particle size distribution

Inactive Publication Date: 2019-05-24
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the raw materials used in the above-mentioned preparation process are all powder crystal materials obtained after single crystal crushing, and then the transparent ceramics are prepared by hot pressing. This process not only brings an increase in the process, but also improves its preparation. Difficulty, for Ce 3+ :BaF 2 The application of transparent ceramics brings difficulties

Method used

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  • A kind of cerium lanthanum doped barium fluoride transparent ceramic and preparation method thereof
  • A kind of cerium lanthanum doped barium fluoride transparent ceramic and preparation method thereof
  • A kind of cerium lanthanum doped barium fluoride transparent ceramic and preparation method thereof

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Embodiment 1

[0032] A kind of cerium lanthanum doped barium fluoride transparent ceramics, its preparation method comprises the following steps:

[0033] 1) Dissolve 0.1mol of sodium hydroxide, 0.2mol of oleic acid, and 0.2mol of absolute ethanol in 150ml of distilled water and stir evenly (500rpm), and prepare mixed solution I; 0.270mol of barium nitrate (Ba(NO 3 ) 2 ), 0.003mol cerium nitrate (Ce(NO 3 ) 3 ·6H 2 O), 0.015mol lanthanum nitrate (La(NO 3 ) 3 ·6H 2 O) be dissolved in 100ml distilled water and be mixed with mixed solution II;

[0034] 2) Add mixed solution II to mixed solution I, stir (500rpm) to ensure that the solution is fully reacted, then add 0.24molNaF to obtain mixed solution III, and then place it in a reaction kettle with a polytetrafluoroethylene liner at 150°C Under the hydrothermal reaction for 6.5h; the obtained white precipitate was centrifuged under the condition of 11000r / min (15min, 3 times), and washed with deionized water and absolute ethanol for 3 ti...

Embodiment 2

[0040] A kind of cerium lanthanum doped barium fluoride transparent ceramics, its preparation method comprises the following steps:

[0041] 1) Dissolve 0.3mol sodium hydroxide, 1mol oleic acid, and 1mol absolute ethanol in 120ml distilled water and stir evenly (300rpm), to prepare mixed solution I; 0.920mol barium nitrate (Ba(NO 3 ) 2 ), 0.010mol cerium nitrate (Ce(NO 3 ) 3 ·6H 2 O), 0.060mol lanthanum nitrate (La(NO 3 ) 3 ·6H 2 O) be dissolved in 90ml distilled water and be mixed with mixed solution II;

[0042] 2) Add mixed solution II to mixed solution I, stir (300rpm) to ensure that the solution is fully reacted, then add 1.200molNaF to obtain mixed solution III, and then place it in a reaction kettle with a polytetrafluoroethylene liner at 130°C Under the condition of hydrothermal reaction for 8h; the obtained white precipitate was centrifuged under the condition of 11000r / min (15min, 3 times), washed with deionized water and absolute ethanol for 3 times, then pla...

Embodiment 3

[0046] A kind of cerium lanthanum doped barium fluoride transparent ceramics, its preparation method comprises the following steps:

[0047] 1) 0.5mol sodium hydroxide, 2.5mol oleic acid, 5mol absolute ethanol are dissolved in 170ml distilled water and stirred evenly (200rpm), and mixed solution I is prepared; 1.53mol barium nitrate (Ba(NO 3 ) 2 ), 0.017mol cerium nitrate (Ce(NO 3 ) 3 ·6H 2 O), 0.136mol lanthanum nitrate (La(NO 3 ) 3 ·6H 2 O) be dissolved in 140ml distilled water and be mixed with mixed solution II;

[0048] 2) Add mixed solution II to mixed solution I, stir (200rpm) to ensure that the solution is fully reacted, then add 1.4molNaF to obtain mixed solution III, and then place it in a reaction kettle with a polytetrafluoroethylene liner at 158°C Under the condition of hydrothermal reaction for 9h; the obtained white precipitate was centrifuged under the condition of 11000r / min (15min, 3 times), and washed with deionized water and absolute ethanol for 3 ti...

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Abstract

The invention discloses cerium-lanthanum doped barium fluoride transparent ceramic and a preparation method thereof. Ce<3+> and La<3+> react with a barium fluoride matrix to obtain a substitutional solid solution, and the Cerium-lanthanum doped barium fluoride transparent ceramic is formed. The preparation method comprises synthesis of nanopowder and hot isostatic pressing sintering. Firstly, a hydrothermal method is adopted to synthesize the nanopowder which has grain size of 15-40 nm and has high dispersity. Then, hot isostatic pressing sintering is adopted to prepare the transparent barium fluoride ceramic with its density being greater than or equal to 99.5% and transmittance at visible and near-infrared band being greater than or equal to 80%. At 290 nm, there exists Ce<3+> characteristic absorption peak; and peak intensity and width are increased with increasing of Ce<3+> dosage concentration. The preparation method has the following advantages: material synthesis output is high; energy consumption is low; and operation is simple. The prepared barium fluoride transparent ceramic has excellent optical performance.

Description

technical field [0001] The invention belongs to the field of non-oxide transparent ceramics, and relates to a cerium-lanthanum-doped barium fluoride transparent ceramic and a preparation method thereof. Background technique [0002] Rare earth-doped fluoride nanopowders have potential application value in display, luminescence, laser materials, optical information transmission, scintillators and optoelectronic devices, and are also sintered raw materials for polycrystalline transparent ceramics and microcrystalline materials in glass ceramics. Therefore, research on nanopowders has become a hot spot in recent years. [0003] BaF discovered in 1982 2 The fast luminescence of 0.6 ns is the fastest inorganic scintillation crystal so far, which has attracted great attention and is used as the preferred detection material for the US Supersuperconducting Collider. The application of its fast luminescent components has become the focus of research, because faster decay time means...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/553C04B35/626C04B35/645
CPCC04B35/553C04B35/626C04B35/6455C04B2235/3215C04B2235/3227C04B2235/3229C04B2235/658C04B2235/77C04B2235/9653
Inventor 宋京红龚豫梅炳初刘晓娅张紫微周志伟
Owner WUHAN UNIV OF TECH
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