There are several forms of lead oxides:
Lead (II) oxide is called lead monoxide (PbO), typically used in
manufacture of special glass.
Lead (II-IV) oxide is called "red lead" and consists of Pb3O4 (
2PbO-PbO2 ).
Lead dioxide PbO2 is called plumbic oxide, used in dyes and in
fireworks.
Lead sesquioxide is Pb2O3.