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Method for preparing barium titanate nano-powder

A technology of nano-powder and barium titanate, applied in chemical instruments and methods, titanium compounds, inorganic chemistry, etc., can solve the problems of difficult separation and control of products, many impurities, and high cost, and achieve shortened preparation cycle, simple production process, and high cost. short cycle effect

Inactive Publication Date: 2010-01-27
SHAANXI UNIV OF SCI & TECH
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  • Summary
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AI Technical Summary

Benefits of technology

This new type of nanoboronium oxide powders have several technical benefits that make them easier for manufacturing processes compared with existing methods like chemical vapor deposition or physical sintered ceramics. These particles also exhibit improved properties when mixed together without any harmful residues from other sources. They may even show better performance than traditional starting materials due to their small size and unique structure.

Problems solved by technology

This patents describes different ways for making nanoboronium oxides (NBOs) by reacting certain metal compounds at very specific temperatures or under specific conditions. These techniques have been developed over time due to their potential applications in various industries like electronics, opticals, sensors, batteries, fuel cells, biomedical implants, energy storage systems, and others.

Method used

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  • Method for preparing barium titanate nano-powder

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Embodiment 1

[0013] 1) Dissolving citric acid in absolute ethanol, the amount of absolute ethanol is based on the amount of citric acid that can be dissolved, and then adding butyl titanate to the absolute ethanol solution dissolved in citric acid, stirring and dissolving to prepare solution 1, wherein, Butyl titanate: the mol ratio of citric acid=1: 1.5;

[0014] 2) dissolving citric acid in ammonia water and then adding barium acetate to prepare solution 2, the amount of ammonia water is based on the ability to dissolve citric acid, wherein barium acetate: citric acid=1: 2 molar ratio;

[0015] 3) Mix solution 1 and solution 2 according to the molar ratio of butyl titanate and barium acetate as 1:1, heat to 60° C. and stir, then add polyethylene glycol three times the mass of citric acid to prepare a precursor solution;

[0016] 4) Evaporate the precursor solution in a water bath at 80°C to a wet gel, transfer it to an oven to dry and foam at 140°C to form a xerogel;

[0017] 5) Put the...

Embodiment 2

[0020] 1) Dissolving citric acid in absolute ethanol, the amount of absolute ethanol is based on the amount of citric acid that can be dissolved, and then adding butyl titanate to the absolute ethanol solution dissolved in citric acid, stirring and dissolving to prepare solution 1, wherein, Butyl titanate: the molar ratio of citric acid=1:2;

[0021] 2) dissolving citric acid in ammonia water and then adding barium acetate to prepare solution 2, the amount of ammonia water is based on the ability to dissolve citric acid, wherein barium acetate: citric acid=1: 1 molar ratio;

[0022] 3) Mix solution 1 and solution 2 according to the molar ratio of butyl titanate and barium acetate as 1:1, heat to 50°C and stir, then add polyethylene glycol twice the mass of citric acid to prepare a precursor solution;

[0023] 4) Evaporate the precursor solution in a water bath at 80°C to a wet gel, transfer it to an oven to dry and foam at 130°C to form a xerogel;

[0024] 5) Put the dry gel ...

Embodiment 3

[0026] 1) Dissolving citric acid in absolute ethanol, the amount of absolute ethanol is based on the amount of citric acid that can be dissolved, and then adding butyl titanate to the absolute ethanol solution dissolved in citric acid, stirring and dissolving to prepare solution 1, wherein, Butyl titanate: the mol ratio of citric acid=1: 1.8;

[0027] 2) dissolving citric acid in ammonia water and then adding barium acetate to prepare solution 2, the amount of ammonia water is based on the ability to dissolve citric acid, wherein barium acetate: citric acid = 1: 1.5 molar ratio;

[0028] 3) Mix solution 1 and solution 2 according to the molar ratio of butyl titanate and barium acetate as 1:1, heat to 55°C and stir, then add polyethylene glycol 2.5 times the mass of citric acid to prepare a precursor solution;

[0029] 4) Evaporate the precursor solution in a water bath at 80°C to a wet gel, transfer it to an oven to dry and foam at 138°C to form a xerogel;

[0030] 5) Put the...

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Abstract

The invention provides a method for preparing barium titanate nano-powder, which comprises the following steps: preparing precursors from tetrabutyl titanate and barium acetate by using citric acid as complexing agent and polyethylene glycol as dispersing agent; and subjecting the precursors to water-bath evaporation, drying, foaming and calcining to obtain the barium titanate nano-powder. The method of the invention has the advantages of short preparation period, high purity, simple process and equipment and high yield.

Description

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Claims

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Application Information

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Owner SHAANXI UNIV OF SCI & TECH
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