Unlock instant, AI-driven research and patent intelligence for your innovation.

A method for controlling the crystal phase of tetrafluorogadolinium sodium thin film by electrodeposition

A technology of sodium tetrafluorogadolinium and thin film crystals, which is applied in the field of controlling the crystal phase of sodium tetrafluorogadolinium thin film, can solve problems such as hindering general application, complicated equipment experimental procedures, etc. Effect

Inactive Publication Date: 2016-09-14
ZHEJIANG UNIV
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these methods require high temperature, high vacuum, complex equipment and strict experimental procedures, which greatly hinder their general application, especially the hexagonal sodium tetrafluorogadolinium, which is now prepared at a relatively high temperature, and has not yet Reports on the preparation of hexagonal sodium tetrafluorogadolinium tetrafluorogadolinium at room temperature. In this invention, NaGdF was prepared for the first time by electrochemical deposition. 4 thin film, and realized the phase transition of sodium tetrafluorogadolinium thin film from cubic phase to hexagonal phase at room temperature

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A method for controlling the crystal phase of tetrafluorogadolinium sodium thin film by electrodeposition
  • A method for controlling the crystal phase of tetrafluorogadolinium sodium thin film by electrodeposition
  • A method for controlling the crystal phase of tetrafluorogadolinium sodium thin film by electrodeposition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (1) Take 3 mL of 0.2 mol / L gadolinium nitrate solution, add 4 mL of 0.2 mol / L disodium edetate solution, add 1.2 mL of 1 mol / L ammonium fluoride solution, and add 0.02 mol / L sodium ascorbate Solution 30mL, adjust the pH value of the solution to 6 with 1mol / L sodium hydroxide, and prepare an electrodeposition solution for use.

[0022] (2) A three-electrode electrochemical cell is used to deposit thin films on conductive glass, in which ITO is the working electrode, the platinum sheet is the counter electrode, and the Ag / AgCl / KCl electrode is the reference electrode. The three electrodes were inserted into the prepared electrodeposition solution, deposited at 60°C for 1 hour, and the deposition voltage was 1.5 V (vs Ag / AgCl / KCl reference electrode).

[0023] (4) The deposited film was washed with deionized water several times, then soaked in acetic acid for 10 minutes, and dried to obtain cubic phase tetrafluorogadolinium sodium, figure 2 a is the XRD pattern of the so...

Embodiment 2

[0025] 1) Take 1mL of 1mol / L gadolinium nitrate solution, add 35mL of 0.01mol / L disodium edetate solution, add 5mL of 1mol / L ammonium fluoride solution, add 5mL of 1mol / L sodium ascorbate solution, and use 1 mol / L sodium hydroxide was used to adjust the pH value of the solution to 7, and about 1.5 g of polyvinylpyrrolidone was added to prepare an electrodeposition solution for use.

[0026] 2) A three-electrode electrochemical cell is used to deposit thin films on conductive glass, in which ITO is the working electrode, the platinum sheet is the counter electrode, and the Ag / AgCl / KCl electrode is the reference electrode. The three electrodes were inserted into the prepared electrodeposition solution, deposited at 35°C for 2 hours, and the deposition voltage was 1.0 V (vs Ag / AgCl / KCl reference electrode).

[0027] 5) The deposited film was washed several times with deionized water, then soaked in acetic acid for 10 minutes, and dried to obtain a cubic phase and a hexagonal mixe...

Embodiment 3

[0029] 1) Take 15ml of 0.01mol / L gadolinium nitrate solution, add 1ml of 0.35mol / L disodium edetate solution, add 65ml of 0.01Mol / L ammonium fluoride solution, add 1ml of 1mol / L sodium ascorbate solution , adjust the pH value of the solution to 9 with 1 mol / L sodium hydroxide, add 5 grams of polyvinylpyrrolidone, and make an electrodeposition solution for later use.

[0030] 2) A three-electrode electrochemical cell is used to deposit thin films on conductive glass, in which ITO is the working electrode, the platinum sheet is the counter electrode, and the Ag / AgCl / KCl electrode is the reference electrode. The three electrodes were inserted into the prepared electrodeposition solution, deposited at 85°C for 20 minutes, and the deposition voltage was 1.0 V (vs Ag / AgCl / KCl reference electrode).

[0031] 5) The deposited film was washed several times with deionized water, then soaked in acetic acid for 10 minutes, and dried to obtain the hexagonal mixed phase of sodium tetrafluoro...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a method for controlling the crystal phase of tetrafluorogadolinium sodium film by using an electrodeposition method. In the method, a tetrafluoroyttrium sodium thin film is deposited on one side of a conductive glass substrate. The deposition solution is a mixed solution of soluble gadolinium salt, disodium edetate, ammonium fluoride, and sodium ascorbate, and the deposition voltage ranges from 1.0 V to 1.5 V (vs Ag / AgCl / KCl reference electrode), and the deposition time is Control in 20 minutes to 2 hours. The phase of tetrafluorogadolinium sodium can be controlled by adding polyvinylpyrrolidone in the deposition solution, including the cubic and hexagonal composite phase tetrafluorogadolinium sodium film, and the hexagonal phase tetrafluorogadolinium sodium film, which realizes tetrafluorogadolinium sodium tetrafluorogadolinium at low temperature phase transition. The invention has the advantages of simple process, readily available raw materials, low cost, low energy consumption, non-toxicity, fast film forming speed, low material production temperature and controllable phase of sodium tetrafluoroyttrium.

Description

technical field [0001] The invention relates to a method for controlling the crystal phase of tetrafluorogadolinium sodium film by using an electrodeposition method. Background technique [0002] Sodium tetrafluorogadolinium has low phonon energy and low multiphonon relaxation rate, and is one of the matrix materials with the highest up-conversion efficiency found so far. It has a wide range of applications in phosphors, optical glass, oxygen sensors, ceramics and high-temperature superconducting materials. It can be used to manufacture magnetic materials for microwaves and important materials for military industry, as well as optical glass, ceramic material additives, high-brightness phosphor powder for large-screen TVs and other picture tube coatings. It is also used in the manufacture of film capacitors, magnetic bubble materials for lasers, storage components, etc. With the development of science and technology, sodium tetrafluorogadolinium will be more and more widely...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C25D9/04C30B7/12C30B29/12
Inventor 贾红邱建荣刘小峰
Owner ZHEJIANG UNIV