Ni9O13

Ni₉O₁₃ is a nickel oxide ceramic compound that exists as a mixed-valence nickel oxide in the Ni-O phase system. This material is primarily of research and materials science interest rather than a widespread commercial ceramic, as it represents an intermediate phase in nickel oxidation chemistry with potential applications in catalysis, solid-state electrochemistry, and functional oxide systems. Its use in industrial applications remains limited compared to more stable nickel oxide phases (such as NiO), though it may serve niche roles in high-temperature oxidation resistance, electrode materials, or specialized catalytic processes where mixed-valence transition metal oxides are beneficial.