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

A sol-gel method for preparing sodium potassium niobate nanorods

A sodium potassium niobate, nanorod technology, applied in nanotechnology, chemical instruments and methods, niobium compounds, etc., can solve the problems of unexplained and unexplained effects of process parameters on NKN morphology.

Inactive Publication Date: 2016-07-20
QIQIHAR UNIVERSITY
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When Liu et al. prepared KNN films by the citric acid method, they also found that the surface particles grew into long rods of 10-20 μm when they were annealed at 900 ° C; but they did not explain the reasons for these phenomena, nor did they study the process parameters in depth. NKN In addition, these reports use citric acid as a metal complexing agent

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] to prepare 11.00 g K 0.5 Na 0.5 NbO 3 Taking nano powder as an example, the required raw materials are 24 grams of oxalic acid, 11.5 grams of niobium hydroxide, 8.73 grams of potassium and sodium tartrate, 15 ml of ethylene glycol, and an appropriate amount of ammonia water. The specific operations are as follows:

[0022] 1. Dissolve 24g of oxalic acid in 400ml of deionized water at 90°C, dissolve 11.5g of Nb(OH) 5 Dissolve in this solution to form Nb-oxalic acid solution, and react for 1 h until the solution becomes clear.

[0023] 2. Add 8.73g of potassium sodium tartrate to the above solution at 90°C and react fully for 0.5h to obtain a transparent and clear solution.

[0024] 3. Adjust the pH of the solution to 3.5 with ammonia water, and after stabilizing for 15 minutes, add 15 ml of ethylene glycol dropwise to the solution under the reaction conditions of 90 °C, and keep stirring for 2 hours to obtain a pale yellow transparent precursor sol.

[0025] 4. Dryi...

Embodiment 2

[0028] to prepare 5.50 g of K 0.5 Na 0.5 NbO 3 Taking nano powder as an example, the required raw materials are 12 grams of oxalic acid, 5.8 grams of niobium hydroxide, 4.36 grams of potassium sodium tartrate, and 8 ml of ethylene glycol. The specific operations are as follows:

[0029] 1. Dissolve 12g of oxalic acid in 200ml of deionized water at 90°C, dissolve 5.8g of Nb(OH) 5 Dissolve in this solution to form Nb-oxalic acid solution, and react for 1 h until the solution becomes clear.

[0030] 2. Add 4.36g of potassium sodium tartrate to the above solution at 90°C and react fully for 0.5h to obtain a transparent and clear solution.

[0031]3. Adjust the pH value of the solution to 3 with ammonia water, and after stabilizing for 15 minutes, add 8 ml of ethylene glycol dropwise to the solution under the reaction conditions of 90 °C, and keep stirring for 2 hours to obtain a pale yellow transparent precursor sol.

[0032] 4. Drying at a constant temperature for 24 hours i...

Embodiment 3

[0035] to prepare 2.80 g of K 0.5 Na 0.5 NbO 3 Taking the nano powder as an example, the required raw materials are 8 grams of oxalic acid, 2.9 grams of niobium hydroxide, 2.44 grams of potassium sodium carbon tartrate, and 6 ml of ethylene glycol. The specific operations are as follows:

[0036] 1. Dissolve 8g of oxalic acid in 200ml of deionized water at 90°C, dissolve 2.9g of Nb(OH) 5 Dissolve in this solution to form Nb-oxalic acid solution, and react for 1 h until the solution becomes clear.

[0037] 2. Add 2.44g of potassium sodium tartrate to the above solution at 90°C and react fully for 0.5h to obtain a transparent and clear solution.

[0038] 3. The pH value of the solution was adjusted to 2.5 with ammonia water, and after stabilizing for 15 minutes, 6 ml of ethylene glycol was added dropwise to the solution under the reaction conditions of 90 °C, and the solution was continuously stirred for 2 hours to obtain a pale yellow transparent precursor sol.

[0039] 4....

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

PropertyMeasurementUnit
diameteraaaaaaaaaa
lengthaaaaaaaaaa
Login to View More

Abstract

The invention discloses a process for preparing sodium potassium niobate nanorods by adopting a sol-gel method. Weigh a certain amount of niobium hydroxide and potassium sodium tartrate, according to the molar ratio Nb(OH) 5 : Oxalic acid=1:3 Weigh oxalic acid and dissolve it in deionized water at 90°C, and Nb(OH) 5 Dissolve in this solution to form Nb-oxalic acid solution, and react for 1h until the solution becomes clear. According to the molecular formula (Na 0.5 K 0.5 )NbO 3 Add potassium and sodium tartrate to the molar ratio of sodium, potassium and niobium to fully react for 0.5h. After adjusting the pH value of the solution to 2.5-3.5 with ammonia water, ethylene glycol was added to the solution and stirred for 2 hours to obtain a light yellow transparent precursor sol. Dry at a constant temperature in a blast drying oven at 90°C for 24 hours to complete the gelation and drying of the gel at one time. After grinding, put it in a sintering furnace and sinter at 750°C for 3 hours. Sodium potassium niobate nanorods with single crystal structure were obtained.

Description

technical field [0001] A sol-gel method for preparing sodium potassium niobate nanorods. Background technique [0002] Sodium potassium niobate lead-free piezoelectric ceramics (K, Na) NbO 3 , referred to as KNN, is an ABO with a perovskite structure 3 Type lead-free piezoelectric ceramic material, near its quasi-homogenous phase boundary point, sodium potassium niobate (K 0.5 Na 0.5 NbO 3 )-based ceramics, because of their good piezoelectricity, pyroelectricity, dielectricity, photoelectricity, ferroelectricity, easy doping modification, good stability, no heavy metal pollution and many other advantages. It is considered to be the most promising lead-free piezoelectric material system to replace PZT piezoelectric ceramic materials. [0003] In recent years, slender and elongated KNN particles have been prepared in the preparation of sodium potassium niobate powders and films at home and abroad. Wang et al. found in the preparation of KNN powders by the citric acid meth...

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): C01G33/00B82Y40/00
Inventor 张德庆杨秀英朱厚彬
Owner QIQIHAR UNIVERSITY
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com