47results about How to "High electrical breakdown strength" patented technology

The invention relates to a graphene-based dielectric elastomer composite material and a preparing method thereof. The composite material comprises an elastomer matrix, graphene oxide dielectric padding and a crosslinking system, wherein the graphene oxide dielectric padding is oxidation graphene with the surface wrapped by a poly-dopamine organic layer and is scattered in the elastomer matrix in a nanometer horizontal layer mode, and an isolation network structure that an oxidized graphene slice layer which is wrapped by the poly-dopamine organic layer wraps latex particles. According to the preparing method, the dopamine bionic ornament oxidization graphene is adopted, the dielectric loss is obviously reduced, the electric breakdown strength is improved, the organic layer thickness of the poly-dopamine can be regulated through the parameters of the modification process of the dopamine, the dielectric constant, the dielectric loss and the electric breakdown strength of the composite material can be adjusted according to the demands, and the graphene-based dielectric elastomer composite material meeting the safety requirement in the biology medical field can be prepared.

The invention discloses a micro-nano composite multi-porous membrane material, which uses polyimide (PI) nanofiber non-woven fabric as a base material, and the pores of the base material are filled with micro-nano Al2O3 particles; the micro-nano Al2O3 Particles, whose diameter is between 50-800nm, accounting for 20-50% of the total weight of the micro-nano composite multi-porous membrane material; the micro-nano composite multi-porous membrane material, whose porosity is between 30-60% , the surface average pore size is between 50-800nm, and the thickness is between 10-40μm. The micro-nano composite multi-porous membrane material provided by the invention is resistant to high temperature, heat shrinkage, high voltage and high current impact, and mechanical impact, and is suitable for use as a safe battery separator and a safe supercapacitor separator, and can be used to manufacture various high-capacity and high-capacity membranes. High power lithium battery or super capacitor. The invention also provides a preparation method of the nanocomposite porous membrane material and its application as a battery diaphragm.

The invention discloses a preparation method for a germanium substrate and La-based high-dielectric constant gate dielectric material. The problems of low dielectric constant and poor thermal stability and thin film compactness of the conventional material are mainly solved. The gate dielectric material comprises an interface layer (1), a barrier layer (2), an La-based high-dielectric constant thin film (3) and a protective layer (4) from bottom to top, wherein the interface layer (1) is made from 0.5 to 1nm thick GeO2; the barrier layer (2) is made from 0.5 to 2nm thick Al2O3; the La-based high-dielectric constant thin film (3) is made from 1 to 10nm thick La2O3 or LaAlO3 or HfLaOx; and the protective layer (4) is made from 1 to 2nm thick Al2O3. The whole material is prepared by an atomic layer deposition method, and is subjected to low-temperature and high-temperature annealing treatment after being prepared. The germanium substrate and La-based high-dielectric constant gate dielectric material has the advantages of high dielectric constant, high thin film compactness, high step coverage, high thermal stability and low surface roughness, and can be used for manufacturing a gate dielectric film of a metal oxide semiconductor field effect transistor.

The invention belongs to the field of film materials, and discloses a dielectric composite multilayer film with high energy storage density and a preparation method thereof. The composite multilayer film comprises a top layer, a middle layer and a bottom layer, wherein the top layer and the bottom layer are both made of PEI; the middle layer is made of PVDF, the middle layer is filled with Ag-coated nano BaTiO3 particles, the maximum energy storage performance of the composite multilayer film reaches 20.6-21.3 J / cm<3> under the electric field intensity of 500-650 MV / m, and the maximum energy storage efficiency reaches 80-82%. Meanwhile, the invention also discloses a preparation method of the composite multilayer film. According to the invention, the energy storage density, the energy storage efficiency, the breakdown field intensity and the temperature stability of the dielectric material are effectively improved.

The invention discloses a composite multi-porous membrane material filled with PTFE-NP, which uses polyimide (PI) nanofiber nonwoven fabric as a base material, and the pores of the base material are filled with polytetrafluoroethylene nano-microspheres ( PTFE-NP); Described PTFE-NP, its diameter is between 100-300nm, accounts for 30-60% of the total weight of nanocomposite multi-porous membrane material; Described PI nanofiber non-woven fabric is thickness between 9 Electrospun PI nanofiber nonwoven fabric with a porosity between ‑38 μm, a porosity between 60‑80%, and a fiber diameter below 0.5 μm. The nanocomposite multi-porous membrane material provided by the invention is resistant to high temperature, heat shrinkage, high voltage and high current impact, and mechanical impact, and is suitable for use as a safe battery diaphragm and a safe supercapacitor diaphragm to manufacture various high-capacity and high-capacity Power lithium battery or super capacitor. The invention also provides a preparation method of the nanocomposite porous membrane material and its application as a battery diaphragm.