Process for the preparation of a coating paste

The granule form particle (101, 102) having fine solid phase is formed and dispersed in liquid (L1). The particles of both the solid phases are mixed such that they are distributed uniformly, and non-uniform agglomerate-lump material of fine granular fine particle is formed from the dispersion. The agglomerate-lump material is sintered by adding liquid (L2), and ground, to obtain homogeneous ink. The granule form particle (101, 102) having fine solid phase is formed, and dispersed in liquid (L1). The particles of both the solid phases are mixed such that they are distributed uniformly, and un-uniform agglomerate-lump material of fine granular fine particle is formed from the dispersion. The agglomerate-lump material is sintered by adding liquid (L2), and ground, to obtain homogeneous ink. The obtained ink comprises fine particles such that particles formed by dispersing liquid (L1) contains several particles of solid phase even after un-uniform agglomeration and grinding process. The ink contains the particles, which are dispersed to form two solid phases, and contact reaction of two solid phases on gas/solid boundary surface is activated by working together the two solid phases using gaseous reactant. Independent claims are included for the following: (1) ink; and (2) fuel cell.