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Nano barium titanate as well as preparation method and application thereof

A barium titanate and nanotechnology, applied in the field of materials, can solve problems such as unsuitable for industrial production, easy agglomeration of powder, and large amounts of waste water, and achieve good economic and environmental benefits, low operating costs, and uniform distribution

Inactive Publication Date: 2019-12-03
INST OF ADVANCED TECH UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the industrial preparation methods of nano-barium titanate are mainly oxalate co-precipitation method and hydrothermal method. Among them, the oxalate co-precipitation method requires heat treatment, and the powder is easy to agglomerate, and the particle size of the powder is above 100 nanometers. It cannot meet the needs of modern electronic ceramic materials; while the hydrothermal method requires high temperature and high pressure, there is a certain risk, and at the same time it will produce a large amount of waste water and other pollution problems, which is not suitable for industrial production

Method used

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  • Nano barium titanate as well as preparation method and application thereof
  • Nano barium titanate as well as preparation method and application thereof
  • Nano barium titanate as well as preparation method and application thereof

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preparation example Construction

[0030] The present invention proposes a kind of preparation method of nanometer barium titanate, and this preparation method comprises the following steps:

[0031] mixing the titanium compound, the first surfactant and the first solvent to obtain a first solution;

[0032] mixing the barium compound, the second surfactant and the second solvent to obtain a second solution;

[0033] mixing the first solution and the second solution to obtain barium titanate colloid;

[0034] The barium titanate colloid is dried and calcined to obtain nanometer barium titanate.

[0035] Here titanium compound can be selected titanium inorganic compound, also can select titanium organic compound, and titanium compound is used as the main source of titanium for preparing nano barium titanate; Barium compound can select barium inorganic compound for use, also can select titanium organic compound, as preparation nano barium titanate main source of barium. Here, the function of the first surfacta...

Embodiment 1

[0057] Weigh 0.35mL of titanium tetrachloride, 0.2g of polyvinyl alcohol and 15mL of ethanol, and mix them to obtain the first solution; weigh 0.66g of barium chloride, 0.1g of polyvinyl alcohol and 20mL of deionized water, and mix them to obtain the second solution. Second solution; add the second solution to the first solution at a dropping rate of 1.5 drops / second, and stir while adding dropwise to obtain barium titanate colloid. Dry and calcinate the barium titanate colloid to control the drying. The temperature is 120° C., the drying time is 24 hours, the calcination temperature is 900° C., and the calcination time is 4 hours, and then nano barium titanate powder can be obtained.

Embodiment 2

[0059] Weigh 0.5mL tetraisobutyl titanate, 0.25gL-cysteine ​​and 20mL deionized water, mix them to obtain the first solution; weigh 0.26g barium hydroxide, 0.15gL-cysteine ​​and 20mL ethanol , and mix them to obtain the second solution; add the second solution to the first solution at a rate of 1.5 drops / second, and stir while adding, to obtain barium titanate colloid, and dry the barium titanate colloid 1. Calcination operation, controlling the drying temperature to 80°C, drying time to 12h, calcination temperature to 800°C, and calcination time to 2h, to obtain nano barium titanate powder.

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Abstract

The invention discloses nano barium titanate as well as a preparation method and application thereof. The preparation method of the nano barium titanate comprises the following steps: mixing a titanium compound, a first surfactant and a first solvent so as to obtain a first solution; mixing a barium compound, a second surfactant and a second solvent so as to obtain a second solution; mixing the first solution and the second solution so as to obtain barium titanate colloid; and drying and calcining the barium titanate colloid, so as to obtain the nano barium titanate. By adopting the technicalscheme of the invention, the granularity of the nano barium titanate can be relatively small, meanwhile, the preparation process can be simple, the operation cost can be low, and pollution such as wastewater is not generated in the preparation process.

Description

technical field [0001] The invention relates to the field of material technology, in particular to a nano barium titanate, a preparation method thereof, and an application thereof. Background technique [0002] Barium titanate is an important ferroelectric compound material with high dielectric constant and low dielectric loss, and is widely used in the electronic ceramic industry. At present, the industrial preparation methods of nano-barium titanate are mainly oxalate co-precipitation method and hydrothermal method. The oxalate co-precipitation method requires heat treatment, and the powder is easy to agglomerate, and the particle size of the powder is above 100 nanometers. It cannot meet the needs of modern electronic ceramic materials; while the hydrothermal method requires high temperature and high pressure, there is a certain risk, and it will produce a large amount of waste water and other pollution problems, which is not suitable for industrial production. [0003] ...

Claims

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Application Information

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IPC IPC(8): C04B35/468C04B35/626H01G4/12H01C7/115H01L27/108
CPCC04B35/4682C04B35/626H01G4/1227H01C7/115H10B12/00
Inventor 杨波吴长征谢毅
Owner INST OF ADVANCED TECH UNIV OF SCI & TECH OF CHINA
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