A low-emissivity multilayer coating includes, in order outward from the
substrate, a first layer including a layer containing titanium oxide, a
layer containing silicon nitride, or a sublayer layer containing titanium
oxide in combination with a sublayer containing silicon nitride; a second
layer including Ag; a third layer including at least one layer selected
from titanium oxide layers and silicon nitride layers; a fourth layer
including Ag; and a fifth layer including silicon nitride. The color of
the coatings can be varied over a wide range by controlling the
thicknesses of the layers of titanium oxide, silicon nitride and Ag. A
diffusion barrier of oxidized metal protects relatively thin, high
electrical conductivity, pinhole free Ag films grown preferentially on
zinc oxide substrates. Oxygen and/or nitrogen in the Ag films improves
the thermal and mechanical stability of the Ag. Dividing the first layer
of titanium oxide, the Ag layers, and/or the third layer with a sublayer
of oxidized metal can provide greater thermal and mechanical stability to
the respective layers.