Development of technique for electrical insulation of metallic gasket using anodic oxide coating

Osakabe, Toyotaka  ; Kato, Yoshihiro*; Honmoto, Satoru*; Kuwahara, Keitaro*

In this article, we describe an unique technique for electrical insulation of metallic gasket to perform simultaneous measurements of electrical resistivity and neutron diffraction under high pressure. The anodic oxide coating was adopted as the insulation layer of the aluminum (JIS A2017) gasket used in the hybrid-anvil device for neutron diffraction. In the feasibility tests of the coated gaskets, maximum pressure of about 6 GPa was generated without electrical breakdown of the coating or disconnection of Au leads.