A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Preparation method for high-dielectric-constant polyvinylidene fluoride-based composite material
The invention provides a preparation method for a high-dielectric-constant polyvinylidene fluoride-based composite material, relates to a preparation method for a composite material, and aims to solve the problem that the dielectric constant of the conventional polyvinylidene fluoride-based composite material is low under a condition that ceramic is used as a filler. The preparation method comprises the following steps: performing ball milling on barium carbonate, calcium carbonate, titanium dioxide and zirconium oxide, drying, screening, placing the mixture into a muffle furnace to obtain crystallized BCT-BZT ceramic powder, simultaneously dripping an iron trichloride solution and a ferrous sulfate solution into the powder under the alkaline condition, removing a supernatant, washing to make the PH value of the washing solution to be neutral, performing suction filtration, drying to obtain a product, performing melt blending on the product and PVDF particles, heating, and magnetizing to obtain the composite material. According to the preparation method, heating and magnetizing treatments are adopted; under the inducing of a magnetic field, the room temperature phase change of BCT-BZT in the morphotropic phase boundary area happens, so that the dielectric constant of the BCT-BZT@Fe3O4/PVDF composite material is obviously improved to be 250-600. The invention belongs to the field of preparation of composite materials.
Preparation method for high-dielectric-constant polyvinylidene fluoride-based composite material
The invention provides a preparation method for a high-dielectric-constant polyvinylidene fluoride-based composite material, relates to a preparation method for a composite material, and aims to solve the problem that the dielectric constant of the conventional polyvinylidene fluoride-based composite material is low under a condition that ceramic is used as a filler. The preparation method comprises the following steps: performing ball milling on barium carbonate, calcium carbonate, titanium dioxide and zirconium oxide, drying, screening, placing the mixture into a muffle furnace to obtain crystallized BCT-BZT ceramic powder, simultaneously dripping an iron trichloride solution and a ferrous sulfate solution into the powder under the alkaline condition, removing a supernatant, washing to make the PH value of the washing solution to be neutral, performing suction filtration, drying to obtain a product, performing melt blending on the product and PVDF particles, heating, and magnetizing to obtain the composite material. According to the preparation method, heating and magnetizing treatments are adopted; under the inducing of a magnetic field, the room temperature phase change of BCT-BZT in the morphotropic phase boundary area happens, so that the dielectric constant of the BCT-BZT@Fe3O4/PVDF composite material is obviously improved to be 250-600. The invention belongs to the field of preparation of composite materials.
Preparation method for high-dielectric-constant polyvinylidene fluoride-based composite material
CHI QINGGUO (author) / DONG JIUFENG (author) / ZHANG CHANGHAI (author) / CUI YANG (author) / LIU GANG (author) / WANG XUAN (author) / LEI QINGQUAN (author)
2015-11-11
Patent
Electronic Resource
English
IPC:
C08L
COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
,
Massen auf Basis makromolekularer Verbindungen
/
C04B
Kalk
,
LIME
/
C08K
Verwendung von anorganischen oder nichtmakromolekularen organischen Stoffen als Zusatzstoffe
,
USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES AS COMPOUNDING INGREDIENTS
Preparation method of polyvinylidene fluoride composite material with high dielectric property
| European Patent Office | 2021
| European Patent Office | 2024
| European Patent Office | 2023
| British Library Online Contents | 2015
| British Library Online Contents | 2014