General Electric Company

Jauwhei Hong

Richard A Jens

Earle L Manson, Jr

Clarence O Clark

Steve S Shen

The present invention employs a mechanical mixture of titanium dioxide and calcium oxide which is sintered and ground to produce a ceramic powder for application to a target of an X-ray tube. The powder is fused by baking the target at a predetermined baking temperature to produce a coating having an enhanced coefficient of emissivity. The required baking temperature is controllable by varying the proportion of titanium dioxide to calcium oxide. Baking time may be extended without degrading the coating by mechanically mixing zirconium dioxide to the sintered and ground ceramic powder prior to application to the X-ray target in order to enhance outgassing from the target substrate. The resulting coating on the target improves the emissivity thereof and exhibits and improved bond strength over coatings of the prior art.

Emissive coating for X-ray target

An x-ray tube target composed of a molybdenum alloy material such as TZM is coated with a mixture containing from 40 percent to 70 percent of TiO.sub.2 with the remaining material being a stabilized oxide. The coating is then fused to a smooth, glossy condition to provide an enhanced thermal-emittance surface that adheres well to the target substrate.

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New Berlin, WI, United States of America

Jauwhei Hong