Electrochemical preparation method of lanthanum phosphate or rare earth doped lanthanum phosphate film

A technology of rare earth doping and lanthanum phosphate, which is applied in chemical instruments and methods, electrolytic inorganic material coating, single crystal growth, etc., can solve the problems of complex equipment experiment procedures and obstacles to general application, and achieve fast deposition rate and material growth temperature Low, good crystallinity effect

Inactive Publication Date: 2011-02-02
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these methods require high temperature, high vacuum, complex equipment,...

Method used

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  • Electrochemical preparation method of lanthanum phosphate or rare earth doped lanthanum phosphate film
  • Electrochemical preparation method of lanthanum phosphate or rare earth doped lanthanum phosphate film
  • Electrochemical preparation method of lanthanum phosphate or rare earth doped lanthanum phosphate film

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Embodiment 1

[0018] 1) Clean the ITO conductive glass twice with acetone, then place the ITO conductive glass in an ultrasonic cleaner for 10 minutes with deionized water, then place the ITO conductive glass in a 10% nitric acid solution by volume to activate it for 10 seconds, Finally, rinse with deionized water and set aside;

[0019] 2) Add 0.01 mol / L sodium phosphate solution to the 0.005 mol / L disodium EDTA and lanthanum ion complex solution, adjust the pH value of the solution to 4, and obtain an electrolyte solution for use;

[0020] 3) Use ITO conductive glass as the working electrode, the platinum electrode as the counter electrode, and the calomel electrode as the reference electrode to form a three-electrode system, place it in the electrolyte for electrodeposition, and the anode deposition potential relative to the calomel electrode is 1.2V, The deposition temperature was 30° C. to obtain a lanthanum phosphate film.

Embodiment 2

[0022] 1) Clean the ITO conductive glass with acetone for 3 times, then place the ITO conductive glass in an ultrasonic cleaner for 30 minutes with deionized water, then place the ITO conductive glass in a 10% nitric acid solution by volume to activate it for 30 seconds, Finally, rinse with deionized water and set aside;

[0023] 2) Add 1 mol / L sodium phosphate solution to the 0.5 mol / L disodium EDTA and lanthanum ion complex solution, adjust the pH value of the solution to 6, and obtain an electrolyte solution for use;

[0024] 3) Use ITO conductive glass as the working electrode, the platinum electrode as the counter electrode, and the calomel electrode as the reference electrode to form a three-electrode system, place it in the electrolyte for electrodeposition, and the anode deposition potential relative to the calomel electrode is 1.8V, The deposition temperature was 80° C. to obtain a lanthanum phosphate film.

Embodiment 3

[0026] 1) Clean the ITO conductive glass twice with acetone, then place the ITO conductive glass in an ultrasonic cleaner for 15 minutes with deionized water, then place the ITO conductive glass in a 10% nitric acid solution by volume to activate it for 15 seconds, Finally, rinse with deionized water and set aside;

[0027] 2) Add 0.02 mol / L solution to the 0.01 mol / L disodium EDTA and lanthanum ion complex solution, adjust the pH value of the solution to 6, and obtain an electrolyte solution for use;

[0028] 3) Use ITO conductive glass as the working electrode, the platinum electrode as the counter electrode, and the calomel electrode as the reference electrode to form a three-electrode system, place it in the electrolyte for electrodeposition, and the anode deposition potential relative to the calomel electrode is 1.6V, The deposition temperature was 50° C. to obtain a lanthanum phosphate film.

[0029] The structure of the lanthanum phosphate film electrodeposited on the ...

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Abstract

The invention discloses a method for preparing a lanthanum phosphate or rare earth doped lanthanum phosphate film through electrodeposition, which comprises the following steps of: (1) cleaning ITO (Indium Tin Oxide) conducting glass 2-3 times with acetone, cleaning the ITO conducting glass with deionized water for 10-30 min in an ultrasonic cleaner, activating the ITO conducting glass in a 10 vol% saltpeter solution for 10-30 s, and cleaning with deionized water for later use; (2) adding a sodium phosphate solution into a 0.005-0.5 mol/L complex solution of ethylene diamine tetraacetic acid and lanthanide ions, and regulating the pH value to 4-6 to obtain an electrolyte for later use; and (3) placing the ITO conducting glass used as a working electrode, a platinum electrode used as a counter electrode and a calomel electrode used as a reference electrode in the electrolyte for electrodeposition to obtain the lanthanum phosphate film, wherein the positive deposition potential relative to the calomel electrode is 1.2-1.8 V. The invention has the advantages of simple equipment, low cost, normal pressure and low temperature. The method not only is applicable to scientific research, but also is hopeful for realizing large-scale industrial production.

Description

technical field [0001] The invention relates to the preparation of thin films, in particular to a method for preparing lanthanum phosphate or rare earth doped lanthanum phosphate thin films by means of electrochemical deposition. Background technique [0002] Rare earth doped lanthanide phosphates are widely used in optical display panels, cathode ray tubes, optoelectronic devices, etc. Lanthanum phosphate has no fluorescence emission, high melting point, and high photon yield. It is an excellent matrix for rare earth doping, and belongs to the monoclinic or hexagonal crystal system. [0003] So far, some preparation methods of lanthanum phosphate and rare earth doped lanthanum phosphate crystals have been developed, such as hydrothermal method, sol-gel method, sonochemical method, chemical precipitation method, microemulsion method, etc. However, these methods require high temperature, high vacuum, complex equipment, and rigorous experimental procedures, which greatly hind...

Claims

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Application Information

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IPC IPC(8): C25D9/04C30B30/02C30B29/14
Inventor 刘润王辉陈科立徐铸德
Owner ZHEJIANG UNIV
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