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Synthetic method of porous BaTiO3 nano particle balls

A technology of nanoparticles and synthesis methods, which is applied in the directions of nanotechnology, nanotechnology, nanostructure manufacturing, etc., to achieve the effects of controllable particle size, large specific surface area, and uniform size

Inactive Publication Date: 2009-12-16
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current method of preparing porous barium titanate nanoparticle spheres using a simple hydrothermal method without adding a template has not yet been reported.

Method used

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  • Synthetic method of porous BaTiO3 nano particle balls
  • Synthetic method of porous BaTiO3 nano particle balls

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Slowly drop tetrabutyl titanate into 5ml of ethanol, the molar concentration of tetrabutyl titanate in the mixed solution is 0.01mol / L, stir until the mixture is uniform to form solution A; mix barium chloride and deionized water Stir and mix evenly to form solution B, the concentration of barium chloride in solution B is controlled at 0.01mol / L; solution A and solution B are mixed and stirred evenly, the ratio of the two is controlled at 1:1 (volume ratio), and then add Sodium hydroxide, the concentration of which is controlled at 0.2mol / l, is hydrothermally reacted at a temperature of 100°C for 20 hours to obtain porous BaTiO 3 Nanoparticle balls. The XRD diffraction peaks of the product are as figure 1 As shown in the middle curve, all the diffraction peaks can be compared with the cubic phase BaTio at the bottom 3 Corresponding to the standard peak of the obtained BaTiO 3 The particles have a pure cubic phase structure, and the morphology is as follows figure 2...

Embodiment 2

[0020] Slowly drop tetrabutyl titanate into 5ml of polyethylene glycol (average molecular weight 200), the molar concentration of tetrabutyl titanate in the mixed solution is 1.0mol / L, stir until uniformly mixed, and form solution A; Stir and mix barium chloride and deionized water evenly to form solution B, the concentration of barium chloride in solution B is 1.0mol / L; mix and stir solution A and solution B evenly, the ratio of the two is controlled at 6:1 (volume ratio), then add sodium hydroxide, the concentration is controlled at 2.0mol / l, and the hydrothermal reaction is carried out at a temperature of 200°C for 50h to obtain porous BaTiO 3 Nanoparticle balls. The XRD diffraction peaks of the product are similar to figure 1 As shown in the middle curve, the shape is similar to figure 2 As shown, its BET is greater than 15m 2 / g.

Embodiment 3

[0022] Slowly drop tetrabutyl titanate into 5ml of propanol, the molar concentration of tetrabutyl titanate in the mixed solution is 0.10mol / L, stir until the mixture is uniform to form solution A; mix barium chloride and deionized Stir and mix the water evenly to form solution B, the concentration of barium chloride in solution B is controlled at 0.12mol / L; mix and stir solution A and solution B evenly, the ratio of the two is controlled at 1:6 (volume ratio), and then add Sodium hydroxide, the concentration of which is controlled at 0.5mol / l, is hydrothermally reacted at a temperature of 150°C for 15 hours to obtain porous BaTiO 3 Nanoparticle balls. The XRD diffraction peaks of the product are similar to figure 1 As shown in the middle curve, the shape is similar to figure 2 , whose BET is greater than 15m 2 / g.

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Abstract

The invention discloses a synthetic method of porous BaTiO3 nano particle balls. The invention comprises the following steps: dripping tetrabutyl titanate into surface active agent, stirring and mixing uniformly to form solution A; blending and mixing uniformly barium chloride and deionized water to form solution B; blending solution A and solution B and mixing uniformly with the volume ratio of 6:1 to 1:6, and then adding sodium hydroxide, carrying out the hydrothermal reaction for 0.3 to 50 hours at the temperature of 100 to 200 DEG C to obtain the porous BaTiO3 nano particle balls. The invention adopts the hydrothermal method to synthetize the porous BaTiO3 nano particle balls and the synthetic method is simple; compared with other wet-chemical methods, the synthetic method in the invention has the advantages of environmental friendliness, low temperature, no calcination and the like; the porous BaTiO3 nano particle balls obtained by the method have high purity, large specific surface area, controllable and uniform particle size, good dispersity, and no further surface treatment when used.

Description

technical field [0001] The invention belongs to the technical field of inorganic nanometer materials, and in particular relates to a method for synthesizing porous BaTiO3 nanoparticle balls. Background technique [0002] Porous materials have the advantages of evenly distributed micropores or pores, high porosity, low bulk density, large specific surface area, and surface structure with unique physical and chemical properties. At present, its application has been applied in many scientific fields such as environmental protection, energy saving, chemical industry, petroleum, smelting, food, pharmaceuticals, biomedicine, etc., and has attracted great attention from the global material science. [0003] Barium titanate (BaTiO 3 ) is the main raw material of dielectric materials, because of its superior dielectric properties such as high dielectric constant and low dielectric loss, and tetragonal phase barium titanate also has ferroelectric and piezoelectric properties, barium ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/00C04B35/468C04B35/626B82B3/00
Inventor 展红全吴明娒杨贤锋文玉萍傅俊祥庄健乐扶雄辉
Owner SUN YAT SEN UNIV
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