公开(公告)号：US06361864B1

公开(公告)日：2002-03-26

申请号：US09243674

申请日：1999-02-02

申请人： Chen-Wen Fan ,  Richard G. W. Gingerich ,  Dale E. Benjamin

发明人： Chen-Wen Fan ,  Richard G. W. Gingerich ,  Dale E. Benjamin

IPC分类号： C09K1165

CPC分类号： C09K11/025 ,  C09K11/584 ,  Y10T428/2991 ,  Y10T428/2993

摘要： A method of coating phosphor particles by chemical vapor deposition. The phosphors are coated by introducing an inert gas into a reaction vessel; charging phosphor particles into the reaction vessel; heating the reaction vessel to a reaction temperature; introducing a coating precursor which includes carbon into the reaction vessel for a time sufficient to saturate the phosphor particles with the precursor; continuing precursor flow into the reaction vessel; introducing an oxygen/ozone mixture into the reaction vessel, the oxygen/ozone mixture comprising less than 4.4 wt. % ozone; and maintaining the inert gas flow, oxygen/ozone mixture flow and further precursor supply for a time sufficient to coat the phosphor particles. The process produces phosphors having from 2200 to 6300 ppm of carbon on the coating and provides lamp efficacy's of greater than 6.1 lm/watt.

摘要翻译： 通过化学气相沉积法涂覆荧光体颗粒的方法。 通过将惰性气体引入反应容器来涂覆荧光体; 将磷光体颗粒装入反应容器中; 将反应容器加热至反应温度; 将包含碳的涂料前体引入反应容器中足以使荧光体颗粒与前体饱和的时间; 持续的前体流入反应容器; 将氧/臭氧混合物引入反应容器中，氧/臭氧混合物包含小于4.4wt。 ％臭氧; 并且保持惰性气体流动，氧/臭氧混合物流和进一步的前体供应足以涂覆荧光体颗粒的时间。 该方法产生在涂层上具有2200至6300ppm碳的荧光体，并提供大于6.1lm /瓦特的灯功效。