Process for preparing barium titanate nano-rod

A technology of nanorods and barium titanate, applied in chemical instruments and methods, titanium compounds, calcium/strontium/barium compounds, etc., can solve the problems of easy decomposition of hydrogen peroxide, explosion, and small amount of products

Inactive Publication Date: 2006-07-12
XIANGTAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has defects such as high reaction temperature, easy decomposition of hydrogen peroxide at higher temperature and explosion, long reaction time, small amount of product, inconvenient post-treatment, and difficulty in obtaining bimetallic alkoxide.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) Take 44.0mL of cyclohexane, 3.52mL of alkylphenol polyoxyethylene (10) ether (OP-10), 0.88mL of n-hexanol and 1.60mL of Ba(OH) with a concentration of 0.20mol / L 2 solution (ω 0 =16, P=1.27) into a three-necked flask, fully mix the components of the above mixture, and vigorously stir on a constant temperature magnetic stirrer for 15 minutes to prepare a uniform and transparent reverse-phase microemulsion; take butyl titanate Soluble in cyclohexane and prepare a solution with a concentration of 0.20mol / L.

[0027](2) Put the microemulsion on a constant temperature magnetic stirrer and heat it to 60°C in a water bath, stir gently for 8 minutes, then slowly add 1.60mL of butyl titanate solution dropwise according to the ratio of the amount of barium and titanium substances to 1.02:1, micro The emulsion immediately turned milky white, reacted at a constant temperature for 2 hours, aged for 24 hours, then centrifuged, and washed away excess surfactant with absolute ethan...

Embodiment 2

[0029] (1) Take 34.5mL cyclohexane, 3.52mL alkylphenol polyoxyethylene (10) ether (OP-10), 0.69mL n-hexanol and 1.20mL concentration of 0.20mol / L barium hydroxide solution (ω 0 =12, P=1.0) into a three-necked flask, fully mix the components of the above mixture, and vigorously stir on a constant temperature magnetic stirrer for 20 minutes to prepare a uniform and transparent reverse-phase microemulsion; take butyl titanate Soluble in cyclohexane and prepare a solution with a concentration of 0.20mol / L.

[0030] (2) Put the microemulsion on a constant temperature magnetic stirrer and heat it to 70°C in a water bath, stir gently for 7 minutes, then slowly add 1.20mL of butyl titanate solution dropwise according to the ratio of the amount of barium and titanium substances to 1.01:1, micro The emulsion immediately turned milky white, reacted at constant temperature for 1.5 hours, aged for 36 hours, then centrifuged, washed away excess surfactant with absolute ethanol to obtain bar...

Embodiment 3

[0032] (1) Take 47.0mL cyclohexane, 3.52mL alkylphenol polyoxyethylene (10) ether (OP-10), 0.94mL n-hexanol and 1.20mL concentration of 0.15mol / L barium hydroxide solution (ω 0 =16, P=1.35) into a three-necked flask, fully mix the components of the above mixture, and vigorously stir on a constant temperature magnetic stirrer for 15 minutes to prepare a uniform and transparent reverse-phase microemulsion; take butyl titanate Soluble in cyclohexane and prepare a solution with a concentration of 0.15mol / L.

[0033] (2) Place the microemulsion on a constant temperature magnetic stirrer and heat it to 50°C in a water bath, stir gently for 6 minutes, then slowly add 1.20mL of butyl titanate solution dropwise according to the ratio of the amount of barium and titanium substances to 1:1, slightly The emulsion immediately turned milky white, reacted at constant temperature for 3 hours, aged for 56 hours, then centrifuged, and washed away excess surfactant with absolute ethanol to obtai...

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Abstract

The invention discloses a making method of barium titanate nanometer bar, which comprises the following steps: selecting polyoxyethylated alkyl (10) phenol (OP-10), positive hexanol, cyclohexanone and water to form microemulsion; taking the titanic butonat and Ba (OH) 2 as reactant; mixing each composition of inversed-phase microemulsion; stirring the mixture strongly in the magnetic stirrer; producing the inversed-phase microemulsion of even transparency and stable property; dripping the titanic butonat solution; producing the barium titanate nanometer bar with 15-85 nm diameter and 300-4000 nm length through reacting, aging, centrifugal separating and cleaning by waterless alcohol. The invention can control the particle dimension and shape of barium titanate nanometer bar, which can be used in the inorganic functional material equipment.

Description

technical field [0001] The invention relates to the preparation of an inorganic functional material, in particular to a method for preparing barium titanate nanorods by adopting an inverse microemulsion method. Background technique [0002] Barium titanate crystals have high dielectric constant and thermal parameters, and are widely used in the manufacture of capacitors and temperature compensation components. They can also be used in semiconductor ceramics, piezoelectric ceramics, piezoelectric pickups and memory components of electronic computers. In addition, as a typical ferroelectric and dielectric material, it is also widely used in the fields of manufacturing nonlinear components, dielectric amplifiers and ferroelectric devices. In recent years, a lot of research has been done on the preparation of barium titanate powder at home and abroad. The main preparation methods include solid phase calcination method, chemical co-precipitation method, sol-gel method, hydrotherm...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/00C01F11/00C04B35/468
Inventor 朱启安宋方平谭仪文王树峰陈万平
Owner XIANGTAN UNIV
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