Luminescent ceramic plates

专利名称：Luminescent ceramic plates

发明人：Peter J. Born,Daniel S. Robertson,Ian M.

Young

申请号：US06/900098申请日：19860815公开号：US04849639A公开日：190718

摘要：A ceramic plate capable of luminescing under electron X-ray or other ionizingradiation comprises a fine powder bound in water glass such as sodium or potassiumhydroxy silicates, or sodium or potassium borates. The powder is typically less than 50&mgr;m mean particle size e. g. 10 . mu.m size. Powder material includes: calcium borate,yttrium aluminate, zinc yttrium silicate, calcium silicate, germanate, Magnesium borate,Barium borate, strontium borate. Dopant materials may be Tb, Tm, Ce, Eu, Pr, Yb, Mn, Cu,Ag, Pb added in amounts up to 15% weight or more. The plate is formed by mixingpowder and water glass into a dough. The dough is pressed in a mould to remove excesswater glass and fired at about 950. degree. C. for about 8 hours. Alternatively excesswater is used when mixing powder and water glass. This excess water is allowed toevaporate while the plate is in a mould prior to pressing and firing. The plate may beused as a cathode ray tube face plate, the detector in an X- ray thermoluminescentsystem, or an X-ray scintillator.

申请人：THE SECRETARY OF STATE FOR DEFENCE IN HER BRITANIC MAJESTY'SGOVERNMENT OF THE UNITED KINGDOM OF GREAT BRITAIN AND NORTHERN IRELAND

代理机构：Nixon & Vanderhye

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