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Method for preparing transparent magneto-optic holmium oxide ceramic

A technology of transparent ceramics and holmium oxide, applied in the field of preparation of oxide transparent ceramics, can solve the problems of uneven distribution of fluoride additives and high linear transmittance of holmium oxide transparent ceramics, achieve high practical application value, and overcome uneven distribution. , The effect of low preparation cost

Active Publication Date: 2018-08-03
NINGBO UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The technical problem to be solved by the present invention is to provide a preparation method of magneto-optical holmium oxide transparent ceramics, which avoids the problem of uneven distribution of fluoride additives used in the existing method in the raw material powder, and the prepared holmium oxide transparent ceramics High linear transmittance

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  • Method for preparing transparent magneto-optic holmium oxide ceramic
  • Method for preparing transparent magneto-optic holmium oxide ceramic
  • Method for preparing transparent magneto-optic holmium oxide ceramic

Examples

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Embodiment 1

[0034] A kind of preparation method of magneto-optic holmium oxide transparent ceramics proposed in this embodiment, it comprises the following steps:

[0035] Step 1: Prepare a holmium nitrate solution with a concentration of 0.25 mol / L; and prepare an ammonium fluoride solution with a concentration of 0.5 mol / L.

[0036]In this embodiment, the configuration process of the holmium nitrate solution is: dissolving holmium oxide in the nitric acid solution to obtain a holmium nitrate solution with a concentration of 0.25mol / L; the configuration process of the ammonium fluoride solution is: dissolving ammonium fluoride in Prepare in water to obtain an ammonium fluoride solution with a concentration of 0.5 mol / L.

[0037] Step 2: At a temperature of 0°C, add ammonia water with a concentration of 1mol / L to the holmium nitrate solution dropwise at a rate of 10mL / min, and make the pH value at the end point of the titration be 10, and continue to age after the titration. After 0.5h, ...

Embodiment 2

[0043] A kind of preparation method of magneto-optic holmium oxide transparent ceramics proposed in this embodiment, it comprises the following steps:

[0044] Step 1: Prepare a holmium nitrate solution with a concentration of 0.15 mol / L; and prepare an ammonium fluoride solution with a concentration of 0.03 mol / L.

[0045] In this embodiment, the configuration process of the holmium nitrate solution is: dissolving holmium nitrate in deionized water to obtain a holmium nitrate solution with a concentration of 0.15 mol / L; the configuration process of the ammonium fluoride solution is: dissolving ammonium fluoride in Configure in water to obtain ammonium fluoride solution with a concentration of 0.03mol / L.

[0046] Step 2: At a temperature of 2°C, add ammonia water with a concentration of 1mol / L to the holmium nitrate solution dropwise at a rate of 5mL / min, and make the pH at the end point of the titration 9.5, and continue to age after the titration. After 2 h, a white precipi...

Embodiment 3

[0052] A kind of preparation method of magneto-optic holmium oxide transparent ceramics proposed in this embodiment, it comprises the following steps:

[0053] Step 1: Prepare a holmium nitrate solution with a concentration of 0.1mol / L; and prepare an ammonium fluoride solution with a concentration of 0.01mol / L.

[0054] In this embodiment, the configuration process of the holmium nitrate solution is: dissolving holmium nitrate in deionized water to obtain a holmium nitrate solution with a concentration of 0.1mol / L; the configuration process of the ammonium fluoride solution is: dissolving ammonium fluoride in Prepare in water to obtain ammonium fluoride solution with a concentration of 0.01mol / L.

[0055] Step 2: At a temperature of 5°C, add ammonia water with a concentration of 1mol / L to the holmium nitrate solution dropwise at a rate of 3mL / min, and make the pH value at the end point of the titration be 9, and continue to age after the titration. After 1 h, a white precipi...

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Abstract

The invention discloses a method for preparing transparent magneto-optic holmium oxide ceramic. The method comprises the following steps: preparing a holmium nitrate solution and an ammonium fluoridesolution; dropwise adding ammonia water to the holmium nitrate solution, and performing aging to obtain a white precipitate; filtering and washing the white precipitate, adding the filtered and washedwhite precipitate to the ammonium fluoride solution, and performing a reaction to obtain a rare earth holmium-based layered compound precursor containing a fluorion group; sequentially washing, drying, grinding and sieving the rare earth holmium-based layered compound precursor containing the fluorion group, and then calcining the precursor to obtain holmium oxide nano-powder; and sequentially performing pre-pressing and cold isostatic press molding on the holmium oxide nano-powder, performing high-temperature pressureless sintering on the cold isostatic press molded product, and machining the high-temperature pressureless sintered product to obtain the transparent holmium oxide ceramic. The method avoids the problem of non-uniform distribution of a fluoride additive, and the prepared holmium oxide ceramic has good optical performances.

Description

technical field [0001] The invention relates to a preparation technology of oxide transparent ceramics, in particular to a preparation method of magneto-optic holmium oxide transparent ceramics. Background technique [0002] Holmium oxide is a new type of magneto-optical material, which can be widely used in various optical fields, especially in high average power laser systems. [0003] The melting point of holmium oxide is relatively high, about 2415°C, so its single crystal growth is difficult. Holmium oxide belongs to the cubic C-type oxide, which has the characteristics of optical isotropy, so it can be prepared into a magneto-optical transparent ceramic material through advanced powder processing technology combined with sintering technology. [0004] Currently the most widely used magneto-optic material is terbium gallium garnet (TGG), because terbium gallium garnet has a very high Verdet constant (the Verdet constant is 36.4rad / Tm at a wavelength of 1064nm), so it c...

Claims

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Application Information

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IPC IPC(8): C04B35/50C04B35/622
CPCC04B35/50C04B35/622C04B2235/445C04B2235/9653
Inventor 吕滨陈红兵孙志刚陈鹏姚斌汪莉鎔詹志康刘旭
Owner NINGBO UNIV
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