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Method for preparing nano structure of columbite-type metal niobate

A technology of nanostructure and niobate, applied in the direction of nanotechnology, nanotechnology, chemical instruments and methods, etc., can solve the problems of high production cost, complex process equipment, large energy consumption, etc., and achieve low production cost, simple process, Mix well and evenly

Inactive Publication Date: 2014-08-06
NANCHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, this method process equipment is complicated, and energy consumption is bigger, and production cost is high

Method used

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  • Method for preparing nano structure of columbite-type metal niobate
  • Method for preparing nano structure of columbite-type metal niobate
  • Method for preparing nano structure of columbite-type metal niobate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Embodiment 1: manganese niobate (MnNb 2 o 6 ) preparation.

[0022] 1) Heat and melt 10g of potassium hydroxide in a nickel crucible, then slowly add 2g of niobium pentoxide, cool to room temperature after the reaction is complete, dissolve the obtained substance in 150mL of distilled water, remove undissolved matter by filtration, and dissolve the obtained clear solution Heat and evaporate at 90°C to obtain needle-like crystals, filter and wash with a mixed solution of ethanol and water (volume ratio 1:1), and dry to obtain the precursor of potassium hydrogen hexaniobate.

[0023] 2) Weigh 0.6 mmol of manganese chloride and 0.2 mmol of potassium hydrogen hexaniobate precursor, and dissolve them in 10 mL of distilled water respectively. Under magnetic stirring, the manganese chloride solution was gradually added dropwise to the potassium hydrogen hexaniobate solution to form a suspension.

[0024] 3) Transfer the obtained suspension to a hydrothermal reaction kettle,...

Embodiment 2

[0026] Embodiment 2: cobalt niobate (CoNb 2 o 6 ) preparation.

[0027] 1) Heat and melt 10g of potassium hydroxide in a nickel crucible, then slowly add 2g of niobium pentoxide, cool to room temperature after the reaction is complete, dissolve the obtained substance in 150mL of distilled water, remove undissolved matter by filtration, and dissolve the obtained clear solution Heat and evaporate at 90°C to obtain needle-like crystals, filter and wash with a mixed solution of ethanol and water (volume ratio 1:1), and dry to obtain the precursor of potassium hydrogen hexaniobate.

[0028] 2) Weigh 0.6 mmol of cobalt chloride and 0.2 mmol of potassium hydrogen hexaniobate precursor, and dissolve them in 10 mL of distilled water respectively. Under magnetic stirring, the cobalt chloride solution was gradually added dropwise to the potassium hydrogen hexaniobate solution to form a suspension.

[0029] 3) Transfer the obtained suspension to a hydrothermal reaction kettle, add dist...

Embodiment 3

[0031] Embodiment 3: nickel niobate (NiNb 2 o 6 ) preparation.

[0032] 1) Heat and melt 10g of potassium hydroxide in a nickel crucible, then slowly add 2g of niobium pentoxide, cool to room temperature after the reaction is complete, dissolve the obtained substance in 150mL of distilled water, remove undissolved matter by filtration, and dissolve the obtained clear solution Heat and evaporate at 90°C to obtain needle-like crystals, filter and wash with a mixed solution of ethanol and water (volume ratio 1:1), and dry to obtain the precursor of potassium hydrogen hexaniobate.

[0033] 2) Weigh 0.6mmol of nickel chloride and 0.2mmol of potassium hydrogen hexaniobate precursor, and dissolve them in 10mL of distilled water respectively. Under magnetic stirring, the nickel chloride solution was gradually added dropwise to the potassium hydrogen hexaniobate solution to form a suspension.

[0034] 3) Transfer the obtained suspension to a hydrothermal reaction kettle, add distill...

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Abstract

The invention discloses a method for preparing nano structure of columbite-type metal niobate. The method is characterized by comprising the following steps: conducting reaction of niobium pentoxide and melted potassium hydroxide, performing recrystallization in a water solution to prepare a precursor of six potassium niobate, and performing hydrothermal reaction of six potassium niobate and soluble metal salt. The technical method disclosed by the invention has the following obvious advantages: 1, the adopted hydrothermal method is simple in technology, convenient to operate, low in manufacturing cost, and environment-friendly; 2, the synthesis technology can be carried out in a relatively low reaction temperature; 3, the whole reaction is carried out in a liquid phase, so that the precursor is fully and uniformly mixed; 4, the method has obvious applicability to the preparation of metal niobate series.

Description

technical field [0001] The invention belongs to the field of inorganic material chemistry and relates to a preparation method of columbite niobate. Background technique [0002] The columbite-structure metal niobate ceramic materials can generally be expressed as ANb 2 o 6 Type general chemical formula, wherein A is a divalent alkaline earth metal or a transition metal. First of all, this type of material has a high dielectric constant and low dielectric loss at microwave frequencies, so it has great application potential as a dielectric resonator material in the field of satellite communications; secondly, columbium iron partially containing magnetic ions Mineral niobate can exhibit unique antiferromagnetic properties; finally, this series of materials also has excellent electrical, electrochemical, optical and catalytic properties. [0003] At present, the most important method for preparing columbite niobate is solid-phase synthesis method, that is, using niobium pento...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G33/00B82Y30/00
Inventor 雷水金王传宁郭东海
Owner NANCHANG UNIV
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