摘要:
The lumen maintenance of fluorescent lamps containing yttrium vanadate phosphors is markedly improved by the presence of a protective oxide layer for the phosphor. The protective oxide layer is produced by evaporating aluminum isopropoxide, in a vacuum, over phorphor particles forming a continuous aluminum isopropoxide over the phosphor particles. The isopropoxide coating is subsequently oxidized by lehring the phosphor at a temperature from about 500.degree. C. to 625.degree. C. forming an alumina coating on the phosphor particles.
摘要:
The present invention is directed to luminescent materials having the general formula:Ca(2-v-w-x-y-z) (NSF).sub.v Sr.sub.w Cd.sub.x Sn.sub.y Mn.sub.z P.sub.2 O.sub.7wherein:NSF is the non-stoicheometric factor;0.ltoreq.v.ltoreq.0.010.ltoreq.w.ltoreq.0.08;0.ltoreq.x.ltoreq.0.05;0.01.ltoreq.y.ltoreq.0.03; and0.05.ltoreq.z.ltoreq.0.15.
摘要翻译:本发明涉及具有以下通式的发光材料:Ca(2-v-w-x-y-z)(NSF)vSrwCdxSnyMnzP2O7其中:NSF是非测定因子; 0 = v = 0.01 0 = w 0.08; 0 = x = 0.05; 0.01 = y <0.03; 和0.05≤z≤0.15。
摘要:
An efficient green emitting phosphor results from the coactivation of yttrium fluoride with gadolinium and erbium. The excitation energy absorbed by the Gd.sup.3+ centers is transferred non-radiatively to minority Er.sup.3+ centers, whose emission produces green light when excited by 275 nanometer or 378 nanometer radiation.
摘要:
Phosphors and a method for producing yellow-emitting tin-manganese coactivated calcium fluorophosphate phosphors having improved brightness comprises the steps of blending a powder mixture including the phosphates, carbonates, fluorides and oxides of calcium, tin, and manganese together with an ammonium salt, and firing the mixture at a temperature of between about 1100.degree. C. and about 1300.degree. C. for a period sufficient to produce a luminescent composition. The presence of an ammonium compound in the initial powder blend promotes the proper atmosphere during the firing step to insure the incorporation of proper levels of tin and manganese ions in the final phosphor.
摘要:
A host acting as an optical emitter and a process of making the same for the .sup..about. 1.3 .mu.m to .sup..about. 1.55 .mu.m spectral region utilized in optical communications is disclosed. The host is Cr-activated willemite (Zn.sub.2 SiO.sub.4). Efficient band-emission at room temperature, with peak at 1.42 .mu.m, is observed on exiting the material in the near infrared, typically at 730 nm and 829 nm.
摘要:
A fluorescent lamp containing a Y.sub.2 O.sub.3 or Al.sub.2 O.sub.3 coating on a layer of yttrium vanadate phosphor and a method of coating the layer of the yttrium vanadate phosphor with a continuous protective coating of Y.sub.2 O.sub.3 or Al.sub.2 O.sub.3 is described. The method comprises applying a coating of a metal, such as yttrium or aluminum, on the yttrium vanadate phosphor then lehring the metallic coating at about 500.degree. C. to about 625.degree. C. to form a continuous protective coating of Y.sub.2 O.sub.3 or Al.sub.2 O.sub.3 overlaying the layer of phosphor.
摘要翻译:描述了在钇钒酸盐荧光体层上含有Y 2 O 3或Al 2 O 3涂层的荧光灯以及用Y 2 O 3或Al 2 O 3的连续保护涂层涂覆钒酸钇荧光体层的方法。 该方法包括将金属如钇或铝的涂层涂覆在钒酸钇荧光体上,然后在约500℃至约625℃下引导金属涂层,以形成覆盖Y 2 O 3或Al 2 O 3的连续保护涂层 磷光体层。
摘要:
The present invention is directed to phosphors exhibiting efficient, narrow band UV emission, with peak emission at 330 nm (from excitation at 254). These phosphors are cerium-activated calcium pyrophosphate (beta-phase) of nominal formulationCa(.sub.2-w-x-y) (NSF).sub.w Ce.sub.x Na.sub.y P.sub.2 O.sub.7wherein:NSF is the non-stoicheometric factor;0.ltoreq.w.ltoreq.0.1;0.05.ltoreq.x.ltoreq.0.20; and0.05.ltoreq.y.ltoreq.0.20.
摘要翻译:本发明涉及显示出有效的窄带UV发射的荧光体,其峰值发射在330nm(从254激发)。 这些荧光体是标称配方Ca(2-w-x-y)(NSF)wCexNayP2O7的铈活化的焦磷酸钙(β相),其中:NSF是非测定因子; 0 = w = 0.1; 0.05 = x <0.20; 和0.05≤y≤0.20。
摘要:
Yellow emitting fluorescent lamp phosphor compositions comprise cerium and manganese activated alkali-earth fluoroapatite compositions containing sodium having the approximate formula(Ca.sub.1-s Sr.sub.s).sub.t Ce.sub.v Na.sub.w Mn.sub.x (PO.sub.4).sub.y F.sub.zwhereins is from 0 to 1t is from about 3.43 to about 4.01v is about 0.3w is about 0.3x is from about 0.3 to about 0.4y is about 3.00z is from about 1.0 to about 4.0.An improved two step firing process for producing the disclosed phosphors is described and an improved fluorescent lamp employing the disclosed phosphors is also described.
摘要:
A luminescent phosphor composition having enhanced luminescent decay lifetime consists essentially of a non-stoichiometric cerium and manganese coactivated alkaline earth orthophosphate represented by the formulaSr.sub.(3-v-w-x-y-z) .quadrature..sub.v Mg.sub.w CA.sub.x (PO.sub.4).sub.2 :Ce.sub.y Mn.sub.zwhere0.001.ltoreq.v.ltoreq.0.050.180.ltoreq.w.ltoreq.0.350.ltoreq.x.ltoreq.0.080.015.ltoreq.y.ltoreq.0.050.01.ltoreq.z.ltoreq.0.10.An improved fluorescent lamp employing the disclosed phosphor is also described.
摘要翻译:具有增强的发光衰变寿命的发光荧光体组合物基本上由由式Sr(3-vwxyz)&squ&vMgwCAx(PO4)2表示的非化学计量的铈和锰共活化碱土金属正磷酸盐组成:其中0.001 = 0.05 0.180 = w = 0.35 0 = x = 0.08 0.015 = y = 0.05 0.01 = z <0.10。 还描述了采用所公开的荧光体的改进的荧光灯。