Coated article with low-E coating including zirconium oxide and/or zirconium silicon oxynitride and methods of making same

A coated article including a coating supported by a glass substrate, the coating comprising, in this order from the glass substrate outwardly:

• a first dielectric layer;
• a first contact layer;
• an infrared (IR) reflecting layer comprising silver located on the substrate over at least and contacting the first contact layer;
• a second contact layer comprising Ni and/or Cr located over and contacting the IR reflecting layer;
• a second dielectric layer comprising silicon nitride located over the second contact layer;
• and
• an overcoat dielectric layer comprises one or more of zirconium oxide, zirconium oxynitride, and/or zirconium silicon oxynitride located over and contacting the second dielectric layer comprising silicon nitride, wherein the overcoat layer is doped with Al and Y.

A coated article including a coating supported by a glass substrate, the coating comprising, in this order from the glass substrate outwardly:

• a first dielectric layer;
• a first contact layer;
• an infrared (IR) reflecting layer located on the substrate over at least and contacting the first contact layer;
• a second contact layer located over and contacting the IR reflecting layer;
• a second dielectric layer located over the second contact layer;
• and
• an overcoat dielectric layer comprises one or more of zirconium oxide, zirconium oxynitride, and/or zirconium silicon oxynitride located over and contacting the second dielectric layer, and wherein the overcoat layer is doped with from about 2-8% Al and from about 2-12% Y2O3.

A coated article including a coating supported by a glass substrate, the coating comprising, in this order from the glass substrate outwardly:

• a first dielectric layer;
• a first contact layer;
• an infrared (IR) reflecting layer located on the substrate over at least and contacting the first contact layer;
• a second contact layer located over and contacting the IR reflecting layer;
• a second dielectric layer located over at least the second contact layer;
• an overcoat dielectric layer comprising one or more of zirconium oxide, zirconium oxynitride, and/or zirconium silicon oxynitride located over and contacting the second dielectric layer;
• and
• wherein the overcoat layer is doped with from about 2-8% Al.