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Method for preparing holmium oxide magneto-optical transparent ceramic with high Verdet constant and high optical quality by using nickel ion uniform doping technology

A technology of uniform doping and optical quality, which is applied in the field of rare earth oxide magneto-optical transparent ceramic preparation, can solve the problems of unfavorable magneto-optical performance, improvement, limited capacity, etc., and achieve the goal of improving optical quality, promoting diffusion process, and improving sintering activity Effect

Active Publication Date: 2020-06-19
SHENZHEN LOTUT INNOVATION DESIGN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Previous studies have shown that doping Pr in terbium gallium garnet and terbium aluminum garnet ceramics 3+ 、Ti 3+ 、Ho 3+ 、Ce 3+ Plasma is conducive to the improvement of the Verdet constant (Opt.Mater.Express, 2014, 4, 2127-2132; Opt Mater., 2018, 84, 330-334; Opt Mater Express, 2016, 6, 91-196; Scripta Mater. ., 2018, 150, 160-163), but the corresponding oxides of these ions are all paramagnetic substances, which have limited ability to increase the Verdet constant, and because the rare earth ions themselves have 4f electrons, they will cause greater optical absorption, Not conducive to the improvement of the overall magneto-optical performance

Method used

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  • Method for preparing holmium oxide magneto-optical transparent ceramic with high Verdet constant and high optical quality by using nickel ion uniform doping technology
  • Method for preparing holmium oxide magneto-optical transparent ceramic with high Verdet constant and high optical quality by using nickel ion uniform doping technology
  • Method for preparing holmium oxide magneto-optical transparent ceramic with high Verdet constant and high optical quality by using nickel ion uniform doping technology

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Experimental program
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Effect test

Embodiment 1

[0037] A technique for uniformly doping nickel ions to prepare holmium oxide magneto-optical transparent ceramics with high Feld constant and high optical quality, comprising the following steps:

[0038] Step 1: Prepare a holmium nitrate solution with a concentration of 0.2mol / L, then add nickel chloride hexahydrate solid into the holmium nitrate solution to dissolve and stir evenly, wherein the doping amount of nickel ions is controlled to a molar ratio of 2.0%; commercially available Sodium hydroxide solid was dissolved in distilled water to obtain a sodium hydroxide solution with a concentration of 1.0 mol / L.

[0039] Step 2: Add 1.0 mol / L sodium hydroxide dropwise to the mixed solution of nickel chloride and holmium nitrate at a temperature of 2°C to obtain a light green precipitated precursor, and control the pH of the titration end point to 7.8. Continue to age for 0.5h after the titration, and the product is washed by centrifugation to remove soluble impurities;

[00...

Embodiment 2

[0044] This embodiment proposes a uniform nickel ion doping technique to prepare holmium oxide magneto-optical transparent ceramics with high Verdet constant and high optical quality, which includes the following steps:

[0045] Step 1: Prepare a holmium nitrate solution with a concentration of 0.075mol / L, then add nickel chloride hexahydrate solid into the holmium nitrate solution to dissolve and stir evenly, wherein the doping amount of nickel ions is controlled at a molar ratio of 1.0%; commercially available Sodium hydroxide solid was dissolved in distilled water to obtain a sodium hydroxide solution with a concentration of 0.5 mol / L.

[0046] Step 2: At a temperature of 3°C, 0.5 mol / L sodium hydroxide was added dropwise to the mixed solution of nickel chloride and holmium nitrate to obtain a light green precipitated precursor, and the pH of the titration end point was controlled to be 8.6. Continue aging for 1.5h after the titration, and the product is washed by centrifug...

Embodiment 3

[0051] This embodiment proposes a uniform nickel ion doping technique to prepare holmium oxide magneto-optical transparent ceramics with high Verdet constant and high optical quality, which includes the following steps:

[0052] Step 1: Prepare a holmium nitrate solution with a concentration of 0.06mol / L, then add nickel chloride hexahydrate solid into the holmium nitrate solution to dissolve and stir evenly, wherein the doping amount of nickel ions is controlled to a molar ratio of 0.5%; commercially available Sodium hydroxide solid was dissolved in distilled water to obtain a sodium hydroxide solution with a concentration of 0.2 mol / L.

[0053] Step 2: At a temperature of 10°C, 0.2 mol / L sodium hydroxide was added dropwise to the mixed solution of nickel chloride and holmium nitrate to obtain a light green precipitated precursor, and the pH of the titration end point was controlled to be 8.2. Continue to age for 6 hours after the titration, and the product is washed by centr...

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Abstract

The invention relates to a method for preparing high-performance holmium oxide magneto-optical transparent ceramic by using a nickel ion uniform doping technology. The method comprises the following steps: preparing a mixed solution of holmium nitrate and nickel chloride and carrying out uniform stirring; dropwise adding a sodium hydroxide solution into the mixed solution to obtain a light green precipitate, continuing stirring, performing ageing, and successively carrying out filtering and washing to obtain a nickel-doped holmium oxide precursor; then adding the precursor into an ammonium sulfate solution for a reaction, washing, drying, grinding and sieving the obtained derivative, and carrying out calcining at a high temperature to obtain ultrafine nickel-doped holmium oxide powder; andcarrying out molding, high-temperature sintering and machining on the powder to obtain the nickel-doped holmium oxide magneto-optical transparent ceramic. The method has the advantages that the nickel component in the product generated by a direct precipitation route of sodium hydroxide is uniformly distributed; the calcined product has high sintering activity; and particularly, nickel oxide withantiferromagnetism is adopted for doping, so the holmium oxide ceramic with high optical quality is obtained, and the Verdet constant of the ceramic is improved.

Description

technical field [0001] The invention belongs to the technical field of preparing rare earth oxide magneto-optical transparent ceramics, in particular to the preparation of holmium oxide magneto-optical transparent ceramics with high Verdet constant and high optical quality through a nickel ion uniform doping technology. Background technique [0002] Magneto-optical materials refer to optical information functional materials with magneto-optical effects in the ultraviolet to infrared band. Rare earth magneto-optical materials are a new type of optical information functional materials. Optical devices with various functions can be made by using the magneto-optical properties of such materials and the interaction and conversion of light, electricity and magnetism. For example, modulators, amplitude separators, magneto-optical switches, magneto-optical sensors, etc. Magneto-optical materials can be divided into magneto-optic crystals, magneto-optic glasses, and magneto-optic ce...

Claims

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Application Information

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IPC IPC(8): C04B35/50C04B35/622C04B35/63
CPCC04B35/50C04B35/622C04B35/6303C04B2235/3279C04B2235/5454C04B2235/602C04B2235/656C04B2235/6567C04B2235/6581C04B2235/9653C04B2235/9646
Inventor 吕滨王梦瑶陶凯王鑫源
Owner SHENZHEN LOTUT INNOVATION DESIGN CO LTD
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