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TYPE
ZO-MOD-BLACK
This coating is grayish
black visually and is designed to have the same properties of the
Type ZO-Mod paint, yet with an emissivity of greater than 0.9 where
typical emissivity values
are
1 micron:
0.65-0.70
8 micron:
0.80
18
micron: 0.90
This is a moderately-low viscosity, alumina-enhanced
phosphate-bonded, water-based, calcium oxide-stabilized [4%]
zirconium oxide coating. Type ZO-MOD-BLACK is readily absorbed by
porous and fibrous ceramic bodies to harden and rigidize the surface
while providing a hard, highly chemically-resistant protective
layer. In its liquid form, with a specific gravity of 2.5 and pH of
3, this grayish-black-colored coating utilizes 40% aluminum
oxyphosphate-nitrate binder along with the active ingredients,
primarily zirconia. On heating to above 600 C, the coating is fully
outgassed, yielding 76% zirconia, 7% phosphorus oxide, 6% alumina,
5% iron oxide, 4% chromium sesquioxide. Type ZO-MOD-BLACK can have a
100 to 500 sq.ft. per gallon coverage, with the lower amount
occurring with porous refractories due to its penetration into them.
A high-hardness, high-emissivity coating results during use to 1800
C in all use-atmospheres.
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