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Barium fluoride up-conversion transparent ceramic and preparation method thereof

A technology of transparent ceramics and barium fluoride, applied in the field of optical functional materials, can solve the problems of poor up-conversion performance, long sintering time and high sintering temperature, and achieve the effects of good up-conversion performance, loose process conditions and low sintering temperature

Inactive Publication Date: 2012-12-19
CHANGCHUN UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the doping concentration of rare earth ions in the existing aluminum oxide up-conversion transparent ceramics is low, so its up-conversion luminous efficiency is relatively low, and the up-conversion performance is poor. These shortcomings limit its use as a photofunctional material in infrared detection devices. , laser devices and other production fields
In addition, in terms of the existing preparation methods of alumina up-conversion transparent ceramics, the preparation process of the precursor by the liquid phase method is relatively complicated; there are many factors that affect the quality of the raw material powder, such as the purity of the raw material powder, the uniformity of particle size, and the dispersibility of the raw material. It is difficult to guarantee; the sintering temperature is high, the sintering time is long, and the vacuum degree is high. If it is to reach 10 -4 Above Pa

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  • Barium fluoride up-conversion transparent ceramic and preparation method thereof

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specific Embodiment approach

[0010] The barium fluoride up-conversion transparent ceramic of the present invention is doped with rare earth ions in the transparent ceramic matrix, the transparent ceramic matrix is ​​a barium fluoride transparent ceramic, and the molar percentage ratio of the barium fluoride up-conversion transparent ceramic is: fluoride 60-89% barium, 10-25% ytterbium fluoride, 1-15% of one or more fluorides of erbium, holmium, neodymium, thulium, promethium.

[0011] The preparation method of barium fluoride up-conversion transparent ceramics of the present invention includes vacuum sintering of transparent ceramics, specifically comprising the following steps:

[0012] 1. Preparation of nano raw material powder

[0013] According to the molar ratio of the final product - barium fluoride 60~89%, ytterbium fluoride 10~25%, and one or more fluorides of erbium, holmium, neodymium, thulium, promethium 1~15% to prepare nano raw materials powder, and the particle size of the barium fluoride p...

Embodiment 1

[0022] Embodiment 1: according to technological process, chemically pure reagent Ba(NO 3 ) 2 Dissolve in deionized water, prepare a solution with a molar concentration of 0.2M, and then add excess ammonium fluoride to generate barium fluoride (BaF 2 ) precipitation, stirred at a stirring rate of 200rpm to obtain a barium fluoride suspension, and then aged for 14 hours, washed with water and dried for 14 hours to obtain a pure phase cubic barium fluoride powder with an average particle size of 40nm. Chemically pure reagent Yb 2 o 3 (ytterbium oxide) is added to nitric acid and heated to dissolve, and prepared into a solution with a concentration of 2M, and then ammonium fluoride is added to generate YbF 3 (ytterbium fluoride) precipitation, stirred at a stirring rate of 300rpm to obtain YbF 3 The suspension was aged for 24 hours, washed with water and dried for 24 hours to obtain ytterbium fluoride powder with an average particle size of 50 nm. Also prepare erbium fluoride...

Embodiment 2

[0023] Embodiment 2: according to technological process, chemically pure reagent Ba(NO 3 ) 2 Dissolve in deionized water, prepare a solution with a molar concentration of 0.2M, and then add excess ammonium fluoride to generate barium fluoride (BaF 2 ) precipitation, stirred at a stirring rate of 200rpm to obtain a barium fluoride suspension, and then aged for 14 hours, washed with water and dried for 14 hours to obtain a pure phase cubic barium fluoride powder with an average particle size of 40nm. Chemically pure reagent Yb 2 o 3 (ytterbium oxide) is added to nitric acid and heated to dissolve, and prepared into a solution with a concentration of 2M, and then ammonium fluoride is added to generate YbF 3 (ytterbium fluoride) precipitation, stirred at a stirring rate of 300rpm to obtain YbF 3 The suspension was aged for 24 hours, washed with water and dried for 24 hours to obtain ytterbium fluoride powder with an average particle size of 50 nm. Also prepare erbium fluoride...

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Abstract

The invention discloses a barium fluoride up-conversion transparent ceramic and a preparation method thereof, and belongs to the technical field of optically functional materials. The existing alumina up-conversion transparent ceramic has low up-conversion luminous efficiency and is prepared difficultly. The barium fluoride up-conversion transparent ceramic utilizes barium fluoride transparent ceramic as a matrix and comprises: by mole, 60 to 89% of barium fluoride, 10 to 25% of ytterbium fluoride, and 1 to 15% of one or more of fluorides of erbium, holmium, neodymium, thulium and promethium. The preparation method comprises the following steps of blending raw material nanometer powder according to the mole percentage, wherein barium fluoride powder has particle sizes of 20 to 80nm and rare earth fluoride powder has particle sizes of 10 to 90nm, pressing the blended raw material nanometer powder into a biscuit, pre-sintering the biscuit at a temperature of 500 to 800 DEG C for 0.5 to 5 hours, carrying out vacuum sintering of the pre-sintered biscuit under the conditions of pressure of 50 to 500MPa, a vacuum degree of 10<-2> to 10<-3>Pa, a heating rate of 1 to 20 DEG C / min, a sintering temperature of 600 to 1200 DEG C and sintering time of 0.5 to 5 hours, and cooling to a room temperature at a rate of 1 to 20 DEG C / min to obtain the barium fluoride up-conversion transparent ceramic.

Description

technical field [0001] The invention relates to a barium fluoride up-conversion transparent ceramic and a preparation method thereof. The barium fluoride transparent ceramic with up-conversion performance is obtained by doping rare earths in a barium fluoride matrix, and belongs to the technical field of optical functional materials. Background technique [0002] As a new type of transparent up-conversion material, up-conversion transparent ceramics have both up-conversion performance and good transparency performance. Combining optical performance with the characteristics of transparent ceramics, it is a kind of optical functional material with excellent performance, which can be used in Infrared detection devices, laser devices, etc. are being manufactured. [0003] The existing up-conversion transparent ceramics belong to the oxide series, such as up-conversion transparent ceramics with rare earth doped alumina matrix. The manufacturing method is to prepare the precursor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/553C04B35/622
Inventor 张希艳石慧米晓云王能利
Owner CHANGCHUN UNIV OF SCI & TECH
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