Method for manufacturing thin and flexible ribbon of dielectric material having high dielectric constant

Abstract

Abstract A method for manufacturing a thin and flexible ribbon of dielectric material comprises heating a raw material mainly consisting of dielectric material which can form a crystalline structure in a solid state and of a glass former which is included by 0 to 50 atomic percentages at a temperature above a melting point of the raw material to form a one phase melt; ejecting the melt thus formed through a nozzle against a cooling surface of a rotating disc, drum or belt, the ejection being carried out under a pressure of 0.01 to 1.5 atm. to form a continuous jet flow of the melt; and cooling instantaneously and rapidly the jet flow of the melt while it is in contact with the cooling surface at a cooling rate of 1,000 to 1,000,000° C./sec so as to form a thin and flexible ribbon of the dielectric material which contains the amorphous state more than 50% in an area ratio. The dielectric constant and breakdown voltage of the ribbon thus formed are very high. Further the mechanical property of the ribbon is also superior to that of known plate or chip of dielectric material. The dielectric constant and the breakdown voltage can be improved by heating the ribbon as grown at a temperature within 300° to 1,100° C.

Inventors

• 👤 Noboru Tsuya
• 👤 Kenichi Arai

Bibliographic Details