摘要:
An alkaline earth aluminate phosphor for a cold cathode fluorescent lamp, which is represented by the compositional formula a (P1-xEux)O.(Q1-yMny)O.bAl2O3 and which is characterized by emitting light when irradiated with ultraviolet rays having a wavelength of from 180 to 300 nm (provided that in the above formula, P represents at least one alkaline earth metal element selected from Ba, Sr and Ca, Q represents at least one bivalent metal element selected from Mg and Zn, and a, b, x and y represent numbers which satisfy 0.8≦a≦1.2, 4.5≦b≦5.5, 0.05≦x≦0.25 and 0.2≦y≦0.4, respectively).
摘要翻译:一种用于冷阴极荧光灯的碱土铝酸盐荧光体,其由组成式a(P1-xEux)O.(Q1-yMny)O.bAl2O3表示,其特征在于当用具有波长的紫外线照射时发光 为180〜300nm(式中,P表示选自Ba,Sr,Ca中的至少1种碱土类金属元素,Q表示选自Mg,Zn的2种以上的2价金属元素,a,b, x和y分别表示满足0.8 <= a <= 1.2,4.5 <= b <= 5.5,0.05 <= x <= 0.25和0.2 <= y <= 0.4的数值。
摘要:
The present invention is to provide a phosphor of minimum particle size having an excellent crystallinity and a high brightness higher than conventional crude particles, which is usable for a highly precise display, a highly bright illuminating element or illuminating apparatus, a high speed immunoassay system or the like, i.e. a phosphor having a substantially spherical outer shape, which comprises primary particles having a median diameter D50 in a range of from 0.05 nullm to 1 nullm and secondary particles having a median diameter D50 in a range of from 0.1 nullm to 2 nullm, wherein at least 50 vol % of the total secondary particles has an aspect ratio of at least 0.8 and an internal quantum efficiency is in a range of from 0.8 to 1.
摘要:
A process for producing fine phosphor particles having a high crystallinity, having a small amount of aggregated particles and comprising fine particles, thus capable of forming a homogeneous and dense high brightness fluorescent layer when applied to e.g. a cathode ray tube, a fluorescent lamp or PDP, and having a high purity, a uniform chemical composition and excellent emission properties, at a low cost, is provided. A process for producing a phosphor, which comprises heating droplets of a solution containing metal elements constituting the phosphor to carry out pyrolysis to obtain the phosphor, wherein the above heating is carried out in the coexistence of an additive comprising a metal or a metal compound to carry out the pyrolysis at an average crystal growth rate of at least 0.002 nullm3/sec.
摘要:
A reed valve is disclosed for use with a pump having a casing. A check valve unit is provided within the casing for preventing counterflow of fluids to be carried. A suction port communicates with a suction line into which the fluids to be carried flow, and a discharge port communicates with discharge line from which the fluids to be carried out are discharged. Reed valves are mounted on the suction port and on the discharge port of the check valve, respectively, in such a manner that the reed valves cover the suction port and the discharge port so as to be able to open and close. Each reed valve includes a first reed valve and second reed valve. The first reed valve is made of pliable material, and is formed to have a size capable of covering the entire respective suction port and discharge port. The second reed valve is smaller than first reed valve and is superposed on the first reed valve to engage the first reed valve such that the first reed valve can open and close, while enhancing sealability thereof.
摘要:
A bivalent europium-activated alkaline earth haloborate phosphor which contains lithium as coactivator, a process for its production, and an ultraviolet ray excited fluorescent tube such as a fluorescent lamp having a fluorescent layer containing such a phosphor as the blue-emitting component.
摘要:
A phosphor for emission of light under low-velocity electron excitation having the formula:(Zn.sub.1-X,Cd.sub.x)S:aLi,bM.sup.I,cX (I)wherein 0.ltoreq.x.ltoreq.1, 0 0, M.sup.I is at least one element selected from the group consisting of Na, K, Ag, Rb, Cs, Au and Cu, and X is at least one element selected from the group consisting of Al, Cl, Br and I.
摘要:
A radiation image storage panel for obtaining a radiation image of an object by causing said panel to absorb a radiation transmitted through said object and then exposing the panel to light of wavelength ranging from 450 to 800 nm to cause the panel to release radiation energy stored therein as fluorescent light, said panel having a fluorescent layer of a rare earth element activated complex halide stimulable phosphor represented by the formulaBaF.sub.2.aBaX.sub.2.bMe.sup.I F.cMe.sup.II F.sub.2.dMe.sup.III F.sub.3 :eLnwherein X is at least one halogen selected from the group consisting of chlorine, bromine and iodine, Me.sup.I is at least one alkali metal selected from the group consisting of lithium and sodium, Me.sup.II is at least one divalent metal selected from the group consisting of beryllium, calcium and strontium, Me.sup.III is at least one trivalent metal selected from the group consisting of aluminum, gallium, yttrium and lanthanum, Ln is at least one rare earth element selected from the group consisting of divalent europium (Eu.sup.2+), cerium and terbium, and a, b, c, d and e are numbers satisfying the conditions of 0.90.ltoreq.a.ltoreq.1.05, 0.ltoreq.b.ltoreq.0.9, 0.ltoreq.c.ltoreq.1.2, 0.ltoreq.d.ltoreq.0.03, 10.sup.-6 .ltoreq.e.ltoreq.0.03 and b+d.noteq.0, respectively. A radiation image storage panel is produced by depositing on a support a fluorescent layer of the above-mentioned phosphor. The radiation image storage panel of this invention has higher sensitivity than the conventional radiation image storage panel having a phosphor layer of the conventional rare earth element activated divalent metal fluorohalide phosphor.
摘要:
A radiographic intensifying screen comprising a support and a fluorescent layer formed thereon, said fluorescent layer consisting essentially of at least one terbium-activated rare earth oxysulfide phosphor of the formula:(Ln.sub.1-x-y, Tb.sub.x, A.sub.y).sub.2 O.sub.2 S (I)wherein Ln is at least one element selected from the group consisting of Y, La, Gd and Lu, A is at least one element selected from the group consisting of Ce, Pr, Nd, Dy, Er and Tm, and x and y are numbers within the ranges of 0.002.ltoreq.x.ltoreq.0.20 and 0.ltoreq.y.ltoreq.0.01, respectively, and at least one terbium-activated rare earth tantalate complex oxide phosphor of the formula:(Ln'.sub.1-z, Tb.sub.z).sub.2 O.sub.3.mTa.sub.2 O.sub.5.nB.sub.2 O.sub.3 (II)wherein Ln' is at least one element selected from the group consisting of Y, La, Gd and Lu, and z, m and n are numbers within the ranges of 0.0001.ltoreq.z.ltoreq.0.1, 0.95.ltoreq.m.ltoreq.1.05 and 0.ltoreq.n.ltoreq.5.0, respectively.
摘要:
A process for recovering highly pure rare earth oxides from a waste rare earth phosphor containing at least Fe and/or Ca as impurities, which comprises dissolving the waste rare earth phosphor in an excess amount of a strong acid capable of dissolving the waste rare earth phosphor, adding to the solution at a temperature of at least 70.degree. C. oxalic acid in an amount of from 0.3 to 1.8 times the theoretical amount to obtain precipitates of rare earth oxalates, washing the precipitates with warm water having a temperature of at least 50.degree. C. and then baking them.
摘要:
A zinc silicate phosphor represented by the formula:(Zn.sub.1-x-2y, M.sup.II.sub.x, Na.sub.2y).sub.2 SiO.sub.4 :Mn.sub.a, As.sub.b, M.sub.c (I)where M.sup.II is at least one element selected from the group consisting of barium, calcium and strontium, M is at least one of antimony and bismuth, and x, y, a, b and c satisfy the conditions of O.ltoreq.x.ltoreq.5.times.10.sup.-2, O.ltoreq.2y.ltoreq.5.times.10.sup.-3, 5.times.10.sup.-5 .ltoreq.a.ltoreq.3.times.10.sup.-2, O.ltoreq.b.ltoreq.5.times.10.sup.-3 and O