Nano silver niobate powder prepared by coprecipitation method and method

A co-precipitation method, silver niobate technology, applied in chemical instruments and methods, niobium compounds, inorganic chemistry, etc., can solve the problems of powder not fine enough, high energy consumption, difficult to control the powder size, etc., to achieve easy preparation conditions The effect of control, simple preparation process and short synthesis cycle

Inactive Publication Date: 2022-03-01
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Currently, the preparation of AgNbO 3 The most commonly used methods for powders are high-temperature solid-phase method and hydrothermal method, but both methods have defects
The high-temperature solid-phase method is easy to introduce impurities during the preparation process, and the synthesis temperature is high and the energy consumption is high. The AgNbO prepared by this method 3 The powder is not fine enough, and the size of the powder is difficult to control
The hydrothermal reaction is carried out under high temperature and high pressure, so the hydrothermal reaction kettle must have good sealing, so that the reaction process of the hydrothermal reaction cannot be directly observed; the preparation cycle of the hydrothermal reaction is long, and large-scale mass production cannot be realized and poor security

Method used

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  • Nano silver niobate powder prepared by coprecipitation method and method
  • Nano silver niobate powder prepared by coprecipitation method and method
  • Nano silver niobate powder prepared by coprecipitation method and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A kind of co-precipitation method of the present invention prepares the method for nano-silver niobate powder, comprises the following steps:

[0036] (1) Press Nb 2 o 5 :AgNO 3 =1:2, Nb 2 o 5 :C 2 h 2 o 4 =1:2, AgNO 3 :C 2 h 2 o 4 =1:2 molar ratio weighs 9g and 18g of C 2 h 2 o 4 Soluble in deionized water at 60°C, the concentration is 0.07mol / L;

[0037] (2) Press Nb 2 o5 :AgNO 3 =1:2 molar ratio weighs 13.3g of Nb 2 o 5 and 17g of AgNO 3 , and then add C in step (1) respectively 2 h 2 o 4 In the solution, stir for 2 hours with a magnetic stirrer;

[0038] (3) AgNO 3 C 2 h 2 o 4 The solution was added dropwise to Nb 2 o 5 C 2 h 2 o 4 In solution, obtain mixed solution, stir 4 hours with magnetic stirrer;

[0039] (4) Adjust the pH value of the mixed solution to 2 with ammonia water and keep it stable for 15 minutes. Press C 2 h 2 o 4 :(CH 2 Oh) 2 =1:2 molar ratio takes by weighing 37.2g (CH 2 Oh) 2 Adding to the mixed solution, ...

Embodiment 2

[0045] A kind of co-precipitation method of the present invention prepares the method for nano-silver niobate powder, comprises the following steps:

[0046] (1) Press Nb 2 o 5 :AgNO 3 =1:2, Nb 2 o 5 :C 2 h 2 o 4 =1:2, AgNO 3 :C 2 h 2 o 4 =1:2 molar ratio weighs 1.8g and 3.6g of C 2 h 2 o 4 Soluble in deionized water at 30°C, the concentration is 0.05mol / L;

[0047] (2) Press Nb 2 o 5 :AgNO 3 =1:2 molar ratio weighs 2.66g of Nb 2 o 5 and 3.4g of AgNO 3 , and then add C in step (1) respectively 2 h 2 o 4 In the solution, stir for 2 hours with a magnetic stirrer;

[0048] (3) AgNO 3 C 2 h 2 o 4 The solution was added dropwise to Nb 2 o 5 C 2 h 2 o 4 In solution, obtain mixed solution, stir 4 hours with magnetic stirrer;

[0049] (4) Adjust the pH value of the mixed solution to 2 with ammonia water and keep it stable for 15 minutes. Press C 2 h 2 o 4 :(CH 2 Oh) 2 =1:2 molar ratio takes by weighing 7.44g (CH 2 Oh) 2 Adding to the mixed solu...

Embodiment 3

[0053] A kind of co-precipitation method of the present invention prepares the method for nano-silver niobate powder, comprises the following steps:

[0054] (1) Press Nb 2 o 5 :AgNO 3 =1:2, Nb 2 o 5 :C 2 h 2 o 4 =1:2, AgNO 3 :C 2 h 2 o 4 =1:2 molar ratio weighs 3.6g and 7.2g of C 2 h 2 o 4 Soluble in deionized water at 45°C, the concentration is 0.05mol / L;

[0055] (2) Press Nb 2 o 5 :AgNO 3 =1:2 molar ratio weighs 5.32g of Nb 2 o 5 and 6.8g of AgNO 3 , and then add C in step (1) respectively 2 h 2 o 4 In the solution, stir for 2 hours with a magnetic stirrer;

[0056] (3) AgNO 3 C 2 h 2 o 4 The solution was added dropwise to Nb 2 o 5 C 2 h 2 o 4 In solution, obtain mixed solution, stir 4 hours with magnetic stirrer;

[0057] (4) Adjust the pH value of the mixed solution to 2 with ammonia water and keep it stable for 15 minutes. Press C 2 h 2 o 4 :(CH 2 Oh) 2 =1:2 molar ratio takes by weighing 14.88g (CH 2 Oh) 2 Adding to the mixed sol...

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Abstract

The invention provides nano silver niobate powder prepared by a coprecipitation method and a method, the method comprises the following steps: step 1, Nb2O5, a silver source, oxalic acid and deionized water are uniformly mixed, the molar ratio of the Nb2O5 to the silver source is 1: (1-3), then the pH value of the obtained mixed solution is adjusted to 2-3, and a mixed system A is obtained; step 2, adding ethylene glycol into the mixed system A, stirring, separating the obtained precipitate, and drying the precipitate to obtain a precursor; and step 3, calcining the precursor at the temperature of 800-900 DEG C to obtain the nano silver niobate powder. The coprecipitation method adopted by the invention not only can refine and uniformly mix the raw materials, but also has the advantages of simple preparation process, low cost, easy control of preparation conditions and short synthesis period.

Description

technical field [0001] The invention relates to the field of nano-silver niobate preparation, in particular to a nano-silver niobate powder prepared by a co-precipitation method and a method thereof. Background technique [0002] With the increasingly serious problems of energy crisis, environmental pollution and climate change, the search for new energy sources has gradually gained attention because it is one of the most effective ways to solve these problems. Utilizing energy storage conversion devices with high energy density and high power density can make full use of new energy sources. Among many energy storage components, compared with chemical batteries and electrochemical supercapacitors, dielectric capacitors have the characteristics of high energy storage efficiency, fast charge and discharge speed, long cycle time, simple structure, and good safety, which makes dielectric capacitors for important role in the future development of human beings. [0003] Dielectr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G33/00
CPCC01G33/00C01P2002/72C01P2004/03C01P2004/62C01P2006/80
Inventor 王卓吴丹李妍欣易志辉薛颖
Owner SHAANXI UNIV OF SCI & TECH
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