| 摘要 |
PURPOSE:To obtain a thin and uniform adhesive layer having excellent vibration-transmittance and to achieve sufficiently high electric conductivity between a piezoelectric ceramic and a metal, by bonding a piezoelectric ceramic with a metal under pressure using an adhesive containing a specific amount of a highly conductive metallic powder having a specific particle diameter. CONSTITUTION:An adhesive is produced by mixing (A) 100pts.wt. of an adhesive composed of one or more components selected from epoxy polymer, acrylic polymer, urethane polymer, phenolic polymer and cyanoacrylate polymer with (B) <=20pts.wt. of highly conductive metal powder having particle diameter of 1-30mum (e.g. composed of one or more metals selected from nickel, copper, aluminum, iron, silver, gold and platinum). The obtained adhesive is applied to a piezoelectric ceramic and a ring made of e.g. an iron-nickel alloy is pressed against the ceramic and bonded by curing the adhesive. |
