Claims
- 1. A dielectric image receiving member comprising:
- a substrate layer having a substrate surface;
- a porous plasma-sprayed dielectric layer formed on said surface, said porous plasma-sprayed dielectric layer having a porous surface with a number of pores, at least some of said pores opening at said porous surface, said porous plasma-sprayed dielectric layer having a thickness ranging from about 0.001 inch to about 0.015 inch and a thickness variation of less than about .+-.5%; and
- a durable dielectric polymeric coating material filling substantially all said pores opening at said porous surface and defining a polymeric surface thereon to provide a voltage uniformity of better than about .+-.5% such that the voltage measured at any point on said polymeric surface is no more than about .+-.5% greater or less than the voltage measured at any other point on said polymeric surface.
- 2. The dielectric image receiving member of claim 1 wherein the durable dielectric polymeric coating material fills pores throughout the plasma-sprayed layer.
- 3. The dielectric image receiving member of claim 1 wherein the durable dielectric polymeric coating material fills pores opening at the surface of the plasma sprayed layer.
- 4. The dielectric image receiving member of claim 1 wherein the plasma-sprayed dielectric layer comprises a metal oxide.
- 5. The dielectric image receiving member of claim 4 wherein the metal oxide is selected from the group consisting of aluminum oxide, zirconium oxide, titanium oxide and mixtures thereof.
- 6. The dielectric image receiving member of claim 4 wherein the metal oxide is aluminum oxide.
- 7. The dielectric image receiving member of claim 4 wherein the metal oxide is a mixture of oxides of different metals.
- 8. The dielectric image receiving member of claim 4 wherein the metal oxide is a mixture of aluminum oxide and an oxide of at least one other metal.
- 9. The dielectric image receiving member of claim 4 wherein the dielectric polymeric coating material is plasma-sprayed with the metal oxide.
- 10. The dielectric image receiving member of claim 1 wherein said porous plasma-sprayed dielectric layer is a metal oxide having a bulk electrical resistivity of at least 10.sup.11 ohm-cm.
- 11. The dielectric image receiving member of claim 1 wherein the porous plasma-sprayed dielectric layer comprises a material selected from the group consisting of Y.sub.2 O.sub.3, BN, Si.sub.3 N.sub.4, CeO.sub.2, ZrSiO.sub.4, MgO, TiB.sub.2, HfO.sub.2, Sm.sub.2 O.sub.3, MoSi.sub.2, SiC, and mixtures thereof.
- 12. The dielectric image receiving member of claim 1 wherein the dielectric polymeric coating material is selected from the group consisting of a polyester, an acrylic, a silicone, a polyimide, and a glass resin.
- 13. The dielectric image receiving member of claim 1 wherein the dielectric polymeric coating material is a glass resin.
- 14. The dielectric image receiving member of claim 1 wherein the dielectric polymeric coating material is selected from the group consisting of polyurethanes, polyesters, fluorocarbon polymers, polycarbonates, polyarylethers, polyaryl sulfones, polybutadiene and copolymers of styrene, vinyl/toluene, acrylates, polyether sulfones, polyimides, poly(amide-imides), polyetherimides, polystyrene and acrylonitrile copolymers, alkyds, cellulosic resins and polymers, nylon and other polyamides, phenolic resins, phenylene oxide, polyvinylidene fluoride, polyvinylfluoride, polybutylene and polycarbonate co-esters.
- 15. The dielectric image receiving member of claim 1 wherein the dielectric polymeric coating material is selected from the group consisting of silicone-silica hybrid polymers, dispersions of colloidal silica and hydroxylated silesquixone in alcoholic media, cross-linked siloxanol-colloidal silica hybrid materials, and glass resins.
- 16. The dielectric image receiving member of claim 1 wherein said thickness variation is less than .+-.2% and said voltage uniformity is better than .+-.2%.
- 17. The dielectric image receiving member of claim 1 wherein said dielectric image receiving member has a surface resistivity of at least 10.sup.8 ohms/square.
Parent Case Info
This is a continuation-in-part of U.S. Ser. No. 08/043,050, filed Apr. 5, 1993, now abandoned, which is a continuation of U.S. Ser. No. 07/625,982, filed Dec. 10, 1990, now abandoned.
US Referenced Citations (18)
Foreign Referenced Citations (1)
Number |
Date |
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0 166 097 |
Jan 1986 |
EPX |
Continuations (1)
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Number |
Date |
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Parent |
625982 |
Dec 1990 |
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Continuation in Parts (1)
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Number |
Date |
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43050 |
Apr 1993 |
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