To solve the problem that the falling-off, positional shift and volumetric change of particles are caused when the pore parts of a metal base material are filled with particles of ceramics or the like to bake the particles and an expected capacity is not obtained as a hydrogen permeable membrane. 金属製基材の孔部にセラミクス等の粒子を充填、焼成した場合に粒子の脱落、位置ずれ、体積変化が起こり、水素透過膜として所期の性能が得られないおそれが生じる。 - 特許庁