Thermal emittance coating for x-ray tube target

Details Thermal emittance coating for x-ray tube target Thermal emittance coating for x-ray tube target

1987-08-26

1989-09-26

Church, Craig E.

X-ray or gamma ray systems or devices

Source

Electron tube

378127, 378143, 378144, 501105, 427 34, 4271263, 4271264, 427423, 1062864, H01J 3510, H01J 3524

Patent

active

048706728

ABSTRACT:
A fused metal oxide ceramic coating is disclosed for application in a particular region of the target employed in an x-ray tube. The disclosed ceramic coating enhances the thermal emittance of a refractory metal target and comprises the fused product of a metal oxide physical mixture comprising Al.sub.2 O.sub.3, ZrO.sub.2, and TiO.sub.2 which exhibits a minimum melting point of approximately 1580.degree. C. A preferred ceramic coating comprises from about 40 weight percent up to about 70 weight percent TiO.sub.2, from about 20 weight percent up to about 40 weight percent ZrO.sub.2, and from about 10 weight percent up to about 20 weight percent Al.sub.2 O.sub.3. A process for the in situ preparation of said ceramic coating is also disclosed along with a particular rotating type x-ray tube and radiographic imaging system employing said improved target.

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