摘要:
A luminescent cerium (Ce) doped compound emitting bright red light, comprising a calcium silicate nitride ternary system, such as CaSiN2-δOδ:Ce3+, that crystallizes in a face-centered cubic unit cell with a lattice parameter of ˜a=14.88 Å. The Ce doped compound can be used for white light applications either: (i) to enhance the light quality of the system based on a blue LED with a yellow or green phosphor, (ii) as an orange phosphor in combination with a blue LED and a green phosphor, or (iii) as a red phosphor in a setup comprising a ultraviolet (UV) LED and red, green and blue (RGB) phosphors. Substitution of smaller elements on the Ca site or larger elements on the Si site leads to a decrease of the emission wavelength towards the yellow or orange region.
摘要:
A red phosphor composition in combination with a semiconductor light emitting device (e.g., VCSEL, LED, or LD), preferably a GaN based device, that emits light at a bright violet-blue light range, i.e., having a wavelength in the range of 400 nm to 600 nm, which can be further combined with green and blue phosphors. The red phosphor composition in the combination is a vanadate combined with yttrium, gadolinium and/or lanthanum and activated with trivalent Eu3+, Sm3+ and Pr330 , or any combination thereof, with or without Tb3+ as a co-dopant, has the general formula: BixLn1-xVO4:A where x=0 to 1, Ln is an element selected from the group consisting of Y, La and Gd, and A is an activator selected from Eu3+, Sm3+ and Pr3+, or any combination thereof, with or without Tb3+ as a co-dopant. Novel red phosphor compositions are provided when x is greater than 0 and less than 1, preferably 0.05 to 0.5.
摘要:
The present invention relates to a composition of metal-incorporated VSB-5 molecular sieve with nanopores and its preparation method, in particular, to a composition of a metal-incorporated VSB-5 molecular sieve with a framework of VSB-5 molecular sieve comprising nickel, phosphorous, oxygen and metal, which is useful in various fields such as a hydrogen storage material, an optical and electric/electronic material, a sensor, a catalyst, a catalyst supporter and an adsorbent, and its preparation method performed in such a manner that a specific metal component is added in a predetermined mole ratio to a reaction mixture comprised of nickel and phosphorous compounds and the resultant mixture is crystallized in the presence of inorganic or organic base as a pH modifier to yield a metal-incorporated VSB-5 molecular sieves in an economical and efficient manner.
摘要:
A red phosphor composition in combination with a semiconductor light emitting device (e.g., VCSEL, LED, or LD), preferably a GaN based device, that emits light at a bright violet-blue light range, i.e., having a wavelength in the range of 400 nm to 600 nm, which can be further combined with green and blue phosphors. The red phosphor composition in the combination is a vanadate combined with yttrium, gadolinium and/or lanthanum and activated with trivalent Eu3+, Sm3+ and Pr3+, or any combination thereof, with or without Tb3+ as a co-dopant, has the general formula: BixLn1−xVO4:A where x=0 to 1, Ln is an element selected from the group consisting of Y, La and Gd, and A is an activator selected from Eu3+, Sm3+ and Pr3+, or any combination thereof, with or without Tb3+ as a co-dopant. Novel red phosphor compositions are provided when x is greater than 0 and less than 1, preferably 0.05 to 0.5.
摘要翻译:一种红色磷光体组合物,与发光在明亮的紫 - 蓝光范围的半导体发光器件(例如,VCSEL,LED或LD)(优选GaN基器件)结合,即具有波长在 400nm至600nm,其可以进一步与绿色和蓝色荧光体组合。 组合中的红色荧光体组合物是与钇,钆和/或镧结合的钒酸盐,并用三价Eu 3+,Sm 3+和Pr 3 + /或其任何组合,具有或不具有作为共掺杂剂的Tb 3+,具有以下通式:Bi x L 1 N 1 - 其中x = 0至1,Ln是选自Y,La和Gd的元素,A是选自Eu, 3 +,+ 3 +和/或+ 3+,或其任何组合,具有或不具有Tb 3+ 多糖 当x大于0且小于1,优选为0.05至0.5时,提供新的红色荧光粉组合物。
摘要:
A method of converting a reactant gas mixture of CO.sub.2, O.sub.2 and CH.sub.4 comprises contacting the reactant gas at 750-850.degree. C. with a solid catalyst, which is a d-block transition metal or oxide such as a group VIII metal on a metal oxide support such as alumina, and which selectively converts the reactant gas into a product gas mixture comprising H.sub.2 and CO.
摘要:
The subject of the invention is a compound chosen from compounds of formula Y2BaZnO5:Er3+, La2BaZnO5:Er3+, Gd2BaZnO5:Er3+, Gd2BaZnO5:Yb3+/Er3+, Gd2BaZnO5:Yb3+/Tm3+. These compounds are capable of converting radiation into radiation with a higher energy level than that of the incident radiation.
摘要:
A method for selectively oxygenating methane to carbon monoxide and hydrogen by bringing the reactant gas mixture at a temperature of at least 600.degree. C. into contact with a sold catalyst which is either:a) a catalyst of the formula M.sub.x M'.sub.y O.sub.z where:M is at least one element selected from Mg, B, Al, Ln, Ga, Si, Ti, Zr and Hf,Ln is at least one member of lanthanum and the lanthanide series of elements,M'is a d-block transition metal,and each of the ratios x/z and y/z and (x+y)/z is independently from 0.1 to 8; orb) an oxide of a d-block transition metal; orc) a d-block transition metal on a refractory support; ord) a catalyst formed by heating a) or b) under the conditions of the reaction or under non-oxidizing conditions.
摘要:
A crystalline phosphor of formula: Lnx.(1−t1−t2−t3−t4)Ybx.t1Erx.t2Tmx.t3Hox.14BayZnzO1.5x+y+z in which: Ln is Y, Gd or La; t1+t2+t3+t4 varies from 0.001 to 0.3; and such that, when x=2, y=1 and z=1: t1+t3+t4 is nonzero; if Ln is La or Gd and if t3+t4 is zero, then t1 varies from 0.05 to 0.1 and t2 varies from 0.02 to 0.07; and if Ln is Gd, then t2+t4 is nonzero.
摘要翻译:(1-t1-t2-t3-t4)Ybx.t1Erx.t2Tmx.t3Hox.14BayZnzO1.5x + y + z的结晶荧光体,其中:Ln是Y,Gd或La; t1 + t2 + t3 + t4从0.001变化到0.3; 并且使得当x = 2时,y = 1且z = 1:t1 + t3 + t4不为零; 如果Ln是La或Gd,如果t3 + t4为零,则t1从0.05变化到0.1,t2从0.02变化到0.07; 并且如果Ln是Gd,则t2 + t4是非零的。
摘要:
The present invention relates to a process for preparing nanoporous VSB-5 molecular sieves, and more particularly, to a process for preparing nanoporous VSB-5 molecular sieves useful as a hydrogen storage material, a catalyst, a catalyst supporter and an adsorbent, performed in such a manner that low-cost inorganic base or monoamine instead of a template essential in the conventional process is, as a pH modifier, incorporated into raw materials comprised of nickel and phosphorous compounds and crystallized to give VSB-5 molecular sieves in an economical and efficient manner.
摘要:
A method of converting a reactant gas mixture of CO.sub.2, O.sub.2 and CH.sub.4 comprises contacting the reactant gas at 750.degree.-850.degree. C. with a solid catalyst, which is a d-block transition metal or oxide such as a group VIII metal on a metal oxide support such as alumina, and which selectively converts the reactant gas into a product gas mixture comprising H.sub.2 and CO.