A higly stable nonaqueous suspension for the electrophoretic coating of alumina powders on double helical filaments has been developed. This suspension enables uniform coating in less than a second at a voltage of 300–600V with an average current density of about 1 mA/cm2. The suspension is composed of dispersing powders, acetone, nitrocellulose, and a small amount of strong base and strong acid. A variety of powders can be anodically deposited uniformly using the same composition. Successful results are obtained for
Al2O3
,
false(normalBa,normalSr,normalCafalse)CO3
,
normalMgO
,
normalZnO
,
TiO2
,
SiO2
,
normalSiO
,
In2O3
,
LaB6
,
WC
, and
normalCdS
powders; for phosphors such as
normalZnS:normalCu,normalAl
,
normalZnS:normalAg
,
normalZnS:normalAu,normalAg,normalAl
,
Y2O2S:normalEu
,
Y2O3:normalEu
,
Y2O2S:normalTb
, and
normalCaS:normalCe
; and for metallic powders such as W, Mo, Ni, Al, Zn, and Ru.