Preparation method of hollow spherical barium-strontium-titanate powder material

A technology of barium strontium titanate and powder material is applied in the field of preparation of monodisperse hollow spherical barium strontium titanate powder, which can solve the problems of easy agglomeration of powder, complicated process and high equipment requirements

Active Publication Date: 2018-07-24
淄博宏荣电子科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to overcome the problems in the prior art that the powder is easy to agglomerate, the process is complex, and the requiremen

Method used

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  • Preparation method of hollow spherical barium-strontium-titanate powder material
  • Preparation method of hollow spherical barium-strontium-titanate powder material
  • Preparation method of hollow spherical barium-strontium-titanate powder material

Examples

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Embodiment 1

[0033] This example is a method for preparing hollow spherical barium strontium titanate by using a hard template method. The atomic composition is Ba 0.6 Sr 0.4 TiO 3 Taking barium strontium titanate as an example, the spherical carbon sphere template is first prepared by hydrothermal method, and then the metal precursor solution containing Ti, Ba and Sr elements is added dropwise on the surface of the carbon sphere, and the C@BSTO composite is obtained by in situ hydrolysis reaction of the surface. microspheres, the central carbon core is removed by high-temperature calcination, and the hollow spherical Ba of cubic perovskite phase is obtained 0.6 Sr 0.4 TiO 3 Powder.

[0034] The specific implementation steps are as follows:

[0035] Step 1: Preparation of monodisperse carbon spheres by hydrothermal method. At room temperature, dissolve 9 g of analytically pure anhydrous glucose powder in 50 mL of deionized water, stir to form a glucose solution, and then add cetyl a...

Embodiment 2

[0052] This example is a method for preparing hollow spherical barium strontium titanate by using a hard template method. The atomic composition is Ba 0.6 Sr 0.4 TiO 3 Take barium strontium titanate as an example. First, the spherical carbon sphere template is prepared by hydrothermal method, and then the metal precursor solution containing Ti, Ba and Sr elements is added dropwise on the surface of the carbon sphere, and the C@BSTO composite is obtained by in-situ hydrolysis reaction on the surface. microspheres, the central carbon core is removed by high-temperature calcination, and the hollow spherical Ba of cubic perovskite phase is obtained 0.6 Sr 0.4 TiO 3 Powder.

[0053] The specific implementation steps are as follows:

[0054] Step 1: Preparation of monodisperse carbon spheres by hydrothermal method. At room temperature, dissolve 9 g of analytically pure anhydrous glucose powder in 50 mL of deionized water, stir to form a glucose solution, and then add cetyl am...

Embodiment 3

[0067] This example is a method for preparing hollow spherical barium strontium titanate by using a hard template method. The atomic composition is Ba 0.6 Sr 0.4 TiO 3 The strontium barium titanate was taken as an example. First, the spherical carbon sphere template was prepared by hydrothermal method, and then the metal precursor solution containing Ti, Ba and Sr elements was added dropwise on the surface of the carbon sphere, and the C@BSTO composite was obtained by in situ hydrolysis reaction of the surface. microspheres, the central carbon core is removed by high-temperature calcination, and the hollow spherical Ba of cubic perovskite phase is obtained 1-x Sr x TiO 3 Powder.

[0068] The specific implementation steps are as follows:

[0069] Step 1: Preparation of monodisperse carbon spheres by hydrothermal method. At room temperature, dissolve 9 g of analytically pure anhydrous glucose powder in 50 mL of deionized water, stir to form a glucose solution, and then a...

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Abstract

The invention discloses a preparation method of a hollow spherical barium-strontium-titanate powder material. The preparation method comprises the following steps of: adopting a hard template method for preparation: using glucose as a raw material, using deionized water as a solvent, and using cetylammonium bromide as a dispersing agent to prepare a carbon-sphere template with negative charges onthe surface; dropping metal precursor solution to the surfaces of the carbon spheres in batches, utilizing in-situ hydrolysis reaction of the surfaces to prepare C@BSTO precursor composite microspheres, removing central carbon cores by high-temperature calcination, and obtaining hollow spherical barium-strontium-titanate powder with cubic perovskite phase. For the obtained powder, the size is uniform, the crystallinity and the dispersity are good, the size can be adjusted to be 0.7-3mu m by controlling the concentration of metal ions, and the shell layer is about 90-300nm in thickness. The preparation method disclosed by the invention has the beneficial effects that the raw materials are easy to obtain, the hazard to the health of a human body is less due to no toxicity and corrosiveness,the requirements for equipment are low; in addition, the preparation method has the characteristics that the process is simple, the process parameters are easily controlled, the product is stable in quality and is easily industrialized.

Description

technical field [0001] The invention belongs to the technical field of powder preparation in material science, in particular to a method for preparing monodisperse hollow spherical strontium barium titanate powder. Background technique [0002] Barium strontium titanate (BST) is an infinite solid solution formed by barium titanate and strontium titanate, with a typical perovskite structure, which combines the high dielectric constant of barium titanate and the low dielectric loss of strontium titanate , The advantages of stable structure, excellent dielectric properties, high insulation resistance, convenient adjustment of dielectric constant, low dielectric loss and high temperature stability of dielectric constant, etc., and the strontium barium titanate material The Curie temperature can be adjusted between 40K and 350K by controlling the ratio between barium and strontium. In recent years, there has been increasing research on endowing materials with new functions by de...

Claims

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Application Information

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IPC IPC(8): C01G23/00
Inventor 高峰张可娜许杰秦梦婕李蕾蕾陈倩
Owner 淄博宏荣电子科技有限公司
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