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Method for chemically synthesizing potassium sodium niobate nano-powder

A nano-powder and chemical synthesis technology, applied in the field of chemical engineering, can solve problems such as high cost, high powder calcination temperature, and complicated treatment, so as to reduce energy consumption and environmental pollution, reduce sintering temperature, process and production cost effect

Inactive Publication Date: 2009-09-23
GUILIN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the method used in the literature is very complicated and costly in the early stage of raw material treatment, and the calcination temperature of the powder in the later stage is relatively high, which is not conducive to large-scale industrial production, and has no great advantages in terms of process simplification and energy consumption.

Method used

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  • Method for chemically synthesizing potassium sodium niobate nano-powder
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  • Method for chemically synthesizing potassium sodium niobate nano-powder

Examples

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Effect test

Embodiment 1

[0015] Analytical grade sodium ethoxide (NaOCH 2 CH 3 ), potassium ethoxide (KOCH 2 CH 3 ), niobium ethoxide (Nb[OCH 2 CH 3 ] 5 ) (prepared by the laboratory), according to the stoichiometric ratio of Na 0.5 K 0.5 NbO 3 Batching, three kinds of raw materials are dissolved in dehydrated alcohol; By mass percentage be the alkylphenol polyoxyethylene (10) ether (OP-10) of 8%, the n-butanol that mass percentage is 6%, mass percentage is 80% Cyclohexane and 4% pure water by mass percentage were prepared into a water / oil microemulsion system, and the temperature was maintained at 25°C; the ethanol solution containing sodium, potassium and niobium was slowly added dropwise to the microemulsion at 4 drops / min In the system, stir while adding dropwise, the stirring speed is 80 rpm, stir for 1 hour after the dropwise addition is completed, and then let it stand for 5 hours; wash the precipitated powder, and heat-treat at 300°C for 1 hour. Use X-ray diffraction to identify the p...

Embodiment 2

[0017] Analytical grade sodium ethoxide (NaOCH 2 CH 3 ), potassium ethoxide (KOCH 2 CH 3 ), niobium ethoxide (Nb[OCH 2 CH 3 ] 5 ) (prepared by the laboratory), according to the stoichiometric ratio of Na 0.5 K 0.5 NbO 3 Batching, three kinds of raw materials are dissolved in dehydrated alcohol; Be the alkylphenol polyoxyethylene (10) ether (OP-10) that mass percentage is 10%, the n-butanol that mass percentage is 10%, mass percentage is 70% Cyclohexane and 10% pure water by mass percentage were prepared into a water / oil microemulsion system, and the temperature was maintained at 25°C; the ethanol solution containing sodium, potassium and niobium was slowly added dropwise to the microemulsion at 6 drops / min In the system, stir while adding dropwise. The stirring speed is 100 rpm. After the dropwise addition is completed, stir for 1 hour, and then let it stand for 8 hours; wash the precipitated powder and heat-treat it at 200°C for 1 hour. Use X-ray diffraction to ident...

Embodiment 3

[0019] Analytical grade sodium ethoxide (NaOCH 2 CH 3 ), potassium ethoxide (KOCH 2 CH 3 ), niobium ethoxide (Nb[OCH 2 CH 3 ] 5 ) (prepared by the laboratory), according to the stoichiometric ratio of Na 0.5 K 0.5 NbO 3 Batching, three kinds of raw materials are dissolved in dehydrated alcohol; Be the alkylphenol polyoxyethylene (10) ether (OP-10) that mass percentage is 5%, the n-butanol that mass percentage is 5%, mass percentage is 85% Cyclohexane and 5% pure water by mass percentage were prepared into a water / oil microemulsion system, and the temperature was maintained at 25°C; the ethanol solution containing sodium, potassium and niobium was slowly added dropwise to the microemulsion at 4 drops / min In the system, stir while adding dropwise. The stirring speed is 80 rpm. After the dropwise addition is completed, stir for 1 hour, and then let it stand for 6 hours; wash the precipitated powder and heat-treat it at 300°C for 1 hour. Use X-ray diffraction to identify ...

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Abstract

The invention discloses a method for chemically synthesizing potassium sodium niobate nano-powder, comprising the following steps of mixing sodium ethoxide (NaOCH2CH3), potassium ethoxide (KOCH2CH3) and columbium ethoxide (Nb[OCH2CH3]5) by the following stoichiometric ratio of Na0.5K0.5NbO3; and hydrolyzing in a micro-emulsion, carrying out heat treatment, and finally preparing the potassium sodium niobate nano-powder with the grain dimension less than 20 nanometers. The potassium sodium niobate nano-powder prepared by the method has fine grain and uniform distribution of grain size and meets the requirement of different electronic ceramic fields; and the method is simple, energy-saving and exhaust-reducing, has low cost and is suitable for batch production.

Description

technical field [0001] The invention relates to a chemical synthesis method of sodium potassium niobate nanopowder, which belongs to the field of chemical engineering. Background technique [0002] It has always been a very effective method to prepare inorganic salt nanopowders by chemical methods. The document "ChaoWang, Yudong Hou, Haiyan Ge, Sol-gel synthesis and characterization of lead-free LNKN nanocrystalline powder, Journal of Crystal Growth 310 (2008) 4635-4639" prepared a sol-gel method with an average particle size of about 20 nanometers lithium sodium potassium niobate powder. However, the method used in the literature is very complicated and costly in the early stage of raw material treatment, and the later powder calcination temperature is relatively high, which is not only not conducive to large-scale industrial production, but also has no great advantages in process simplification and energy consumption cost. Contents of the invention [0003] The purpose...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G33/00C04B35/495C04B35/626
Inventor 刘来君方亮胡长征
Owner GUILIN UNIVERSITY OF TECHNOLOGY
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