Abstract: A manufacturing method for white light source utilizes an ultraviolet light source and suitable phosphors. One of the phosphors is directly excited by the ultraviolet light source and generates a radiation with longer wavelength. Other phosphors are excited by the radiation with longer wavelength and generate radiation with much longer wavelength. The lights generated by those phosphors are mixed to form a white light.

Abstract: A method for manufacturing white light source includes the steps of providing an ultra-violet light as radiation source; and preparing two kinds of phosphors each receiving the ultra-violet light and emitting light of different wavelength. One phosphor is designated to emit light covering two wavelength regimes of three primitive colors, i.e., red light (585-640 nm), green light (500-570 nm) and blue light (430-490 nm), and another phosphor is designated to emit light covering remaining wavelength regime of the three primitive colors. The phosphors are mixed in predetermined ratio such that the lights of different wavelength are combined to provide a white light.

Abstract: The subject invention relates to a pink light-emitting device with high brightness, which comprises a light-emitting diode as a luminescent element and a fluorescent body containing yttrium aluminum garnet fluorescent powders with formula of (Y3−x−yCexZy)Al5O12 or (Y3CexZy)Al5O12, wherein said light-emitting element emits a purple to blue light with a wavelength ranging from 400 nm to 450 nm, 0<x≦0.8, 0.5<y≦2.5, and Z is selected from a group consisting of rare earth metals other than cerium (Ce).

Abstract: A pulsed voltage surges resistant enamelled wire comprises a metal conductive wire and at least one shield layer outside the wire, the shield layer is provided by a coating composition comprising (a) a synthetic resin, (b) an organic solvent and (c) metal oxide particles, wherein the metal oxide particles comprise &agr;-form Al2O3 particles, &ggr;-form Al2O3 particles and transition metal oxide particles.

Abstract: The subject invention relates to yttrium aluminum garnet fluorescent powders with formula (Y3-x-yZxEuy)Al5O12 or (Y3ZxEuy)Al5O12, wherein 0<x≦0.8, 0<y≦1.5, and Z is selected from a group consisting of rare earth metals other than europium (Eu). The subject invention also relates to a pink light-emitting device, which comprises a light-emitting diodes as a luminescent element and a fluorescent body containing yttrium aluminum garnet fluorescent powders, wherein the diode emits a light with a wavelength ranging from 370 to 410 nm, which then excites the yttrium aluminum garnet fluorescent powders in the fluorescent body to emit another light with a wavelength ranging from 585 nm to 700 nm, so the two lights combine to produce a pink light. The subject invention also relates to the preparation of the yttrium aluminum garnet fluorescent powders.

Abstract: A high frequency-resistant enamelled wire including a metal conductor as a core having a diameter of 0.1 to 1.5 mm and a coat layer superimposed on the core having a thickness of 0.079 to 0.13 mm. The high frequency-resistant insulated winding wire has excellent adhesion on the core and are mainly used in power supply transformers and winding materials for high frequency in electrical machines.

Abstract: A high frequency-resistant thermosetting coating is provided for the manufacture of high frequency-resistant enamelled wires. A high frequency-resistant enamelled wire produced from the high frequency-resistant thermosetting coating is also provided. The adhesion, crosslinking density, abrasion resistance, and softening resistance of the coating are excellent. With the same nominal diameter and a coating thickness more than 85 &mgr;m, the high frequency resistant lifetime of the enamelled wire produced from the high frequency-resistant thermosetting coating is 3 to 4 times as that of conventional thermoplastic enamelled wires.

Abstract: A structure of an ink-jet printer head of a piezoelectric type comprising a deformable polymer membrane, an actuator and an ink tank is provided. The deformable polymer membrane covers the top opening of the ink tank to enclose the ink tank. The actuator, which is a double-layer piezoelectric ceramic plate, is mounted on the deformable polymer membrane with one end thereof being fixedly connected to the polymer membrane and the other end thereof being free to vibrate. As a double-layer piezoelectric ceramic plate is employed as the actuator, it includes a top and a bottom piezoelectric layers. A predetermined voltage signal is applied selectively across the upper-surface electrode and the lower-surface electrode of the top and bottom piezoelectric layer respectively such that the top piezoelectric layer extends and the bottom layer shortens selectively.

Abstract: A pulsed voltage surges resistant enamelled wire comprises a metal conductive wire and at least one shield layer outside the wire, the at least one shield layer is provided by a coating composition comprising (a) a synthetic resin, (b) an organic solvent and (c) &agr;-form Al2O3 particles and &ggr;-form Al2O3 particles.

Abstract: A novel process for the preparation of ultra-fine powders of metal oxide wherein a surfactant is added to the solution for the preparation of the metal oxide to provide nanometer metal oxide powders without the utilization of vacuum or high pressure conditions is disclosed.

Abstract: A high temperature resistant colored enamel wire comprises a metal conductive wire and at least one colored coating layer outside the wire, the at least one colored coating layer is provided by a coating composition comprising (a) a synthetic resin, (b) an organic solvent and (c) an inorganic pigment. In addition to having good appearance and uniform color, the high temperature resistant colored enamel wire can provide the temperature resistance and insulation properties meeting the requirements of the art.

Abstract: An apparatus and method for continuously monitoring the liquid nitrogen level a liquid nitrogen container and automatically refilling liquid nitrogen from a liquid nitrogen reservoir when the liquid nitrogen in the container falls below a predetermined level. The apparatus comprises a liquid nitrogen level sensing element, which contains a superconducting material, such as a YbaCuO type superconductiing material, disposed on a non-conducting substrate, such as magnesium oxide. The superconducting material is selected such that it has a critical temperature approximately equal to the boiling point temperature of liquid nitrogen. The superconducting material is placed near the predetermined level and, under normal conditions, the superconducting material exhibits zero or near zero resistance.

Abstract: Superconducting compositions characterized by the formula (Pb.sub.a A.sub.1-a)(Sr.sub.b Ba.sub.1-b).sub.2 (Ca.sub.c B.sub.1-c)Cu.sub.2 O.sub.7 wherein at least half the A atoms are Hg and the remainder, if any, are selected from one or more of Cd, Tl and Cu, B is selected from Y and the rare earths, a is from 0.3 to 0.7, b is from 0 to 1 and c is from 0.2 to 0.5 are disclosed. The superconductive compositions display zero-resistance temperatures up to about 80K.

Abstract: A family of mercury-containing Sr-(Ca.cndot.Y)-Cu-O superconducting materials having a zero-resistance temperature, T.sub.c(zero), greater than 90 K so that they can be cooled to and maintain the desired superconducting characteristics using relatively less expensive liquid nitrogen, are disclosed. The high-temperature superconductor is represented by the formula of: (Pb.sub.0.5 Hg.sub.0.5)(Sr.sub.2-x Ba.sub.x)(Ca.sub.0.7 Y.sub.0.3)Cu.sub.2 O.sub.7-.delta. ; wherein the value of x ranges between about 0.1 and about 0.6, preferably between about 0.2 and about 0.3. These superconducting materials are prepared by first grinding and mixing in open air constituent oxide powders of PbO, HgO, SrO.sub.2, BaO.sub.2, CaO, Y.sub.2 O.sub.3, and CuO. After mixing, the powder mixture is pressed under a pressure of about 5 ton/cm.sup.2 to form a pellet having a diameter of 8 mm and a thickness of 3 mm. Thereafter, the pressed pellet is wrapped with a gold foil (with a thickness of 0.

Abstract: A process for fabricating Thallium-based superconducting tapes comprising the steps of: (1) preparing a powder mixture having a nominal composition of (Tl.sub.1-x-y Bi.sub.y Pb.sub.z)(Ba.sub.2-z Sr.sub.z)Ca.sub.2 Cu.sub.3 O.sub.9 ; (2) placing the powder mixture into a silver tube and drawing and/or swaging the silver tube containing the powder mixture into a wire having a pre-determined diameter, wherein x and y are real numbers between 0.2 and 0.4, and z is a real number between 0 and 2; (3) rolling the wire into a tape having a pre-determined thickness; and (4) subjecting the tape to a two-stage single-sintering process at two respective sintering temperatures. The two-stage single-sintering process of the present invention allows Thallium-based superconducting tapes to be fabricated which exhibit substantially increased critical current density, without causing a substantially increased cost and complexity, as do other prior art processes, such as the double-sintering process.

Abstract: Unexpected results were obtained when Tl-1223 and Tl=-2223 superconductive materials were annealed at respectively pre-determined annealing temperatures. The optimum annealing temperatures for Tl-1223 and Tl-2223 superconductive materials are found to be 860.degree. C. and 820.degree. C., respectively. By incorporating the optimum annealing temperature and an optimum annealing envirenment, which is expressed in terms of oxygen partial pressure, into the manufacturing process, the present invention presents a method which can substantially increase the critical temperature of thallium based superconductive materials with greatly reduced annealing time and with improved reproducibility, and is thus superior to any method disclosed in the prior art.

Abstract: Superconducting materials of the (T1,In)-Sr-Ca-Cu-O system-type are modified to raise their critical tempertures by substituting an element M for part of the Tl/In and optionally substituting Y or a rare earth element for some of the Ca.M is a transition metal with valency electrons in d orbitals in its normal state and having accessible tri-and/or tetra-valent states, that is V, Ti, Cr, Zr, Nb, Hf or Ta (which are preferred) Mn, Fe, Co, Ni, Mo, Rh, W, Os, Ir, Re or Ru.

Abstract: A process for preparing powder of high temperature oxide superconductors of Bi-Pb-Sr-Ca-Cu-O type. In an aqueous solution of nitrate salts of Bi, Pb, Sr, Ca, and Cu metals, an appropriate ratio of triethylamine/oxalic acid was added to form a coprecipitate. Through the process of calcination at a temperature in the range of 750.degree. C. to 800.degree. C. and sintering at a temperature of 860.degree. C., a uniform and fine powder superconductive metal oxide having a critical temperature of 110K is obtained as the final product.

Abstract: A citrate/ethylenediamine gel method for forming oxide superconductors of the Y-Ba-Cu-O, Bi-Ca-Sr-Cu-O, Tl-Ca-Ba-Cu-O system by employing the nitrates of the individual metals and citric acid. Ethylenediamine is then added to form gels. These materials then undergo calcination and sintering processes. The respective superconductors obtained possess a superconducting zero resistance temperature at 93K, 78K and 118K respectively.

Abstract: Preparation of superconducting epitaxial film using the method of liquid phase epitaxial growth comprising the steps of:(1) melting the oxides of bismuth, calcium, strontium, and copper or the oxides of thallium, calcium, barium, and copper at temperature in the range of 900.degree. C. to 950.degree. C. to form a melt;(2) contacting the melt in (1) with magnesium oxide or mono crystalline materials;(3) lowering the temperature of the melt at a rate of 0.3.degree.-2.degree. C./min until the temperature is within the range of 820.degree. C. to 890.degree. C.;(4) separating the melt and the magnesium oxide substrate or mono crystalline material to obtain a superconducting epitaxial film; and(5) quenching said film in (4) until the temperature thereof is at room temperature, whereby a superconducting epitaxial film having a thickness of 40 to 150 .mu.m is obtained.