Method for making barium titanate nanopowders
AssigneesWuhan Institute of Technology, Wuhan Great Materials Co., Ltd.
InventorsXingmao Jiang, Qilong Wu, Long Chen, Lang Yang, Biyi Chen, Shengjun Yi, Yunfeng Liao
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Abstract
A method for making barium titanate nanopowders, includes mixing barium salt, titanium source, carbohydrate, and urea in a container according to a first ratio, stirring the barium salt, the titanium source, the carbohydrate, and the urea in the container under a heating condition approximately from 60° C. to 120° C. to obtain a molten mixture, heating the molten mixture to dehydrate and carbonize the carbohydrate to obtain a dark brown solid, and performing a heat treatment on the dark brown solid to obtain the barium titanate nanopowders.
Claims10
A method for making barium titanate nanopowders, comprising:
- mixing barium salt, titanium source, carbohydrate, and urea in a container according to a first ratio, stirring the barium salt, the titanium source, the carbohydrate, and the urea in the container under a heating condition of approximately from 60° C. to 120° C. to obtain a molten mixture, wherein the titanium source includes titanium tetrachloride, titanium tetrabromide, tetraethyl titanate, tetrabutyl titanate, or titanium isopropoxide;
- heating the molten mixture to dehydrate and carbonize the carbohydrate to obtain a dark brown solid;
- and
- performing a heat treatment on the dark brown solid to obtain the barium titanate nanopowders.
A method for making barium titanate nanopowders, comprising:
- mixing barium salt, titanium source, carbohydrate, and urea in a container according to a first ratio, stirring the barium salt, the titanium source, the carbohydrate, and the urea in the container under a heating condition of approximately from 60° C. to 120° C. to obtain a molten mixture;
- heating the molten mixture to dehydrate and carbonize the carbohydrate to obtain a dark brown solid;
- and
- performing a heat treatment on the dark brown solid to obtain the barium titanate nanopowders,
- wherein heating the molten mixture to dehydrate and carbonize the carbohydrate to obtain the dark brown solid includes:
- heating the molten mixture to dehydrate and carbonize the carbohydrate to obtain the dark brown solid in a normal pressure or in an airtight reaction kettle;
- and
- performing at least one of:
- microwaving the molten mixture 0.1 minute to 60 minutes with a microwave power of 0.1 kW to 50 kW;
- or
- heating the molten mixture at a temperature of 120° C. to 250° C. for 1 hour to 48 hours.
A method for making barium titanate nanopowders, comprising:
- mixing barium salt, titanium source, carbohydrate, and urea in a container according to a first ratio, stirring the barium salt, the titanium source, the carbohydrate, and the urea in the container under a heating condition of approximately from 60° C. to 120° C. to obtain a molten mixture;
- heating the molten mixture to dehydrate and carbonize the carbohydrate to obtain a dark brown solid;
- and
- performing a heat treatment on the dark brown solid to obtain the barium titanate nanopowders,
- wherein performing the heat treatment on the dark brown solid to obtain the barium titanate nanopowders includes calcining the dark brown solid at 400° C. to 600° C. for 1 hour to 10 hours in an air atmosphere to remove carbon to obtain the barium titanate nanopowders.
Dependencies are inferred from the claim text.