44results about How to "High dielectric" patented technology

An actuator (10) is formed by sequentially stacking an intermediate layer (12), a lower conductive layer (13), an oxide layer (14), and an upper conductive layer (15) on a silicon or GaAs single crystal substrate (11). The intermediate layer (12) of magnesia spinel (MgAl2O4), the lower conductive layer (13) of a platinum-group element or its alloy, and the oxide layer (14) of a crystalline structure having a simple perovskite lattice are epitaxially grown and formed. The oxide layer (14) is composed of a crystal having a simple perovskite lattice, and its (001) surface grows epitaxially. Accordingly, the oxide layer (14) has good crystallinity, and is excellent in dielectric constant, piezoelectric property, and electrostrictive property since a voltage application direction matches the polarization axis.

The invention discloses a chip multilayer ceramic capacitor dielectric ceramic slurry and preparation method of a dielectric, and belongs to the field of ceramic dielectric materials. The main component of the ceramic slurry provided by the invention is barium titanate, and also comprises a burning supporting agent, wherein the burning supporting agent comprises water glass and silicon dioxide, wherein the mass ratio of water glass to barium titanate is 1%-10%, and the mass ratio of silicon dioxide to barium titanate is 0.8%-1.2%. The preparation method of the dielectric comprises the following steps: 1) selecting a set quantity of the main component barium titanate, as well as the burning supporting agent, a diluent, a dispersion agent and a bonding agent A, and putting them into a ball milling machine for ball milling; 2) carrying out ball milling for a set period of time, then adding a set quantity of a bonding agent B in slurry after ball milling, and carrying out ball milling continuously; and 3) carrying out plate coating and sintering on the obtained slurry after ball milling for a set time, thereby obtaining the dielectric material. According to the invention, the energy consumption is reduced from all aspects greatly, and an MLCC (multiplayer ceramic chip capacitor) produced by the method is low in production cost and has good energy storage effect.

The invention discloses a high dielectric polyimide / carbon nanotube composite material and a preparation method thereof. The method includes: (1) coating a layer of copper phthalocyanine on the surface of the hydroxylated carbon nanotube; (2) preparing a high dielectric polyimide / carbon nanotube composite material. The present invention coats a layer of copper phthalocyanine on its surface through esterification reaction, and this method can improve the dispersion state of carbon nanotubes in polyimide, which is beneficial to improve the dielectric properties of composite materials; meanwhile, in carbon nanotubes The surface of the tube is coated with a layer of non-conductive copper phthalocyanine, which can also solve the problem of significantly increased dielectric loss caused by the seepage effect.