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 increased procedures, difficulties in the application of transparent ceramics, and increased difficulty in preparation, and achieves low cost and suppressed concentration bursts. The effect of annihilation effect and narrow particle size distribution

Inactive Publication Date: 2017-03-22
WUHAN UNIV OF TECH
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  • 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

Method used

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  • Cerium-lanthanum doped barium fluoride transparent ceramic and preparation method thereof
  • Cerium-lanthanum doped barium fluoride transparent ceramic and preparation method thereof
  • Cerium-lanthanum doped barium fluoride transparent ceramic and preparation method thereof

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[0031] Example 1

[0032] A cerium-lanthanum-doped barium fluoride transparent ceramic, and its preparation method includes the following steps:

[0033] 1) Dissolve 0.1 mol of sodium hydroxide, 0.2 mol of oleic acid, and 0.2 mol of anhydrous ethanol in 150 ml of distilled water and stir evenly (500 rpm) to prepare mixed solution I; add 0.270 mol 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) Dissolve in 100ml of distilled water to prepare mixed solution II;

[0034] 2) Add the mixed solution II to the mixed solution I, stir (500rpm) to ensure that the solution is fully reacted, and then add 0.24mol NaF to obtain the mixed solution III, and then place it in a reactor with a polytetrafluoroethylene liner at 150°C 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 tim...

Example Embodiment

[0039] Example 2

[0040] A cerium-lanthanum-doped barium fluoride transparent ceramic, and its preparation method includes the following steps:

[0041] 1) Dissolve 0.3 mol sodium hydroxide, 1 mol oleic acid, and 1 mol absolute ethanol in 120 ml distilled water and stir evenly (300 rpm) to prepare mixture I; add 0.920 mol 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) Dissolve in 90ml of distilled water to prepare mixed solution II;

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

Example Embodiment

[0045] Example 3

[0046] A cerium-lanthanum-doped barium fluoride transparent ceramic, and its preparation method includes the following steps:

[0047] 1) Dissolve 0.5 mol sodium hydroxide, 2.5 mol oleic acid, and 5 mol absolute ethanol in 170 ml distilled water and stir evenly (200 rpm) to prepare mixture I; add 1.53 mol 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) Dissolve in 140ml of distilled water to prepare mixture II;

[0048] 2) Add the mixed solution II to the mixed solution I, stir (200rpm) to ensure that the solution is fully reacted, and then add 1.4mol NaF to obtain the mixed solution III, and then place it in a reactor with a polytetrafluoroethylene liner at 158°C Under the hydrothermal reaction for 9h; centrifuge the obtained white precipitate at 11000r / min (15min, 3 times), and wash it with deionized water and absolute ethanol for 3 times, then place it in an oven to dry and then grind...

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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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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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