Roofing granule including a base particle and a layer covering the base particle, a process of forming the same, and a roofing product including the roofing granule

摘要

A roofing granule can include a material including a transition metal carbonate; a mixed metal carbonate, wherein at least one metal within the mixed metal carbonate includes a transition metal; a first metal carbonate and a second metal compound, wherein the first and second metals are different metal elements; a third metal carbonate and silica; or any combination thereof. A process of forming a roofing granule can include providing a base particle having pores, and infiltrating a fluid into the pores of the base particle, wherein the fluid includes a carbonate. The process can further include reacting the carbonate with a metal compound within the base particle to form a metal carbonate, wherein the roofing granule comprises a material that includes the metal carbonate.