Thoria-yttria emission mixture for discharge lamps专利检索-金属卤化物灯高强度放电灯气体放电灯灯光专利检索查询-专利查询网

Thoria-yttria emission mixture for discharge lamps

阅读：318发布：2022-02-17

专利汇可以提供Thoria-yttria emission mixture for discharge lamps专利检索，专利查询，专利分析的服务。并且An improved emission material particularly useful as a coating on the metallic electrodes of metal halide lamps consists of a solid solution of yttrium oxide in the thorium oxide lattice. Enhanced maintenance including less shifting of color rendition with life is achieved. Preferred proportions are 5 to 20 mole percent of YO3 in ThO2 prefired into a single-phase solid solution.，下面是Thoria-yttria emission mixture for discharge lamps专利的具体信息内容。

权利要求

1. AN ELECTRODE FOR AN ARC DISCHARGE DEVICE COMPRISING A REFRACTORY METAL SUBSTRATE AND AN ELECTRON EMISSIVE MATERIAL CARRIED THEREON COMPRISING A SOLID SOLUTION OF Y2O3 IN TH2 WHEREIN THE PROPORTION OF Y2O3 IS IN THE RANGE FROM A SMALL AMOUNT EFFECTIVE TO IMPROVE EMISSION CHARACTERISTICS UP TO ABOUT 50 MOLE PERCENT IN THO2.

2. An electrode as in claim 1 wherEin the proportion of Y2O3 is in the range from 5 to 20 mole percent in ThO2.

3. A high pressure electric discharge lamp comprising a light-transmitting envelope having refractory metal electrodes sealed into opposite ends and containing an ionizable medium including mercury, metal halide and an inert gas at low pressure, and an electron emissive material carried on said electrodes comprising a solid solution of Y2O3 in ThO2 wherein the proportion of Y2O3 is in the range from a small amount effective to improve emission characteristics up to about 50 mole percent in ThO2.

4. A lamp as in claim 3 wherein the proportion of Y2O3 is in the range from 5 to 20 mole percent in ThO2.

5. A lamp as in claim 3 wherein the refractory metal electrodes comprise turns of tungsten wire wound around a tungsten shank and the electron emissive material is coated on said turns and lodged in the interstices between turns.

6. A lamp as in claim 5 wherein the proportion of Y2O3 is in the range from 5 to 20 mole percent in ThO2.

7. A lamp as in claim 6 wherein the ionizable filling includes sodium, thallium and indium iodides.

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Thoria-yttria emission mixture for discharge lamps

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