Abstract:
A lamp comprising an arc envelope and an end structure (14) coupled to the arc envelope, and wherein the end structure comprises at least one opening (24; 40) adapted to support an arc electrode (26) and to receive a dosing material into the arc envelope.
Abstract:
An electrically conducting cermet comprises at least one transition metal element dispersed in a matrix of at least one refractory oxide selected from the group consisting of yttria, alumina, garnet, magnesium aluminum oxide, and combinations; wherein an amount of the at least one transition metal element is less than 15 volume percent of the total volume of the cermet. A device comprises the aforementioned electrically conducting cermet.
Abstract:
A scintillation detector comprising nano-scale particles of a scintillation compound embedded in a plastic matrix is provided. The nano-scale particles may be made from metal oxides, metal oxyhalides, metal oxysulfides, or metal halides. Methods are provided for preparing the nano-scale particles. The particles may be coated with organic compounds or polymers prior to incorporation in the plastic matrix. A technique for matching the refractive index of the plastic matrix with the nano-scale particles by incorporating nano-scale particles of titanium dioxide is also provided. The scintillator may be coupled with one or more photodetectors to form a scintillation detection system. The scintillation detection system may be adapted for use in X-ray and radiation imaging devices, such as digital X-ray imaging, mammography, CT, PET, or SPECT, or may be used in radiation security detectors or subterranean radiation detectors.
Abstract:
A scintillation detector comprising nano-scale particles of a scintillation compound embedded in a plastic matrix is provided. The nano-scale particles may be made from metal oxides, metal oxyhalides, metal oxysulfides, or metal halides. Methods are provided for preparing the nano-scale particles. The particles may be coated with organic compounds or polymers prior to incorporation in the plastic matrix. A technique for matching the refractive index of the plastic matrix with the nano-scale particles by incorporating nano-scale particles of titanium dioxide is also provided. The scintillator may be coupled with one or more photodetectors to form a scintillation detection system. The scintillation detection system may be adapted for use in X-ray and radiation imaging devices, such as digital X-ray imaging, mammography, CT, PET, or SPECT, or may be used in radiation security detectors or subterranean radiation detectors.
Abstract:
A lamp having a ceramic arc envelope, an end structure coupled to the ceramic arc envelope and extending across an opening in the ceramic arc envelope, where the end structure comprises a passageway communicative with an interior chamber of the ceramic arc envelope is provided. The lamp further includes a molybdenum-rhenium electrode lead extending through and sealed with the passageway. The molybdenum- rhenium electrode lead includes a molybdenum-rhenium alloy. Furthermore, the lamp includes an arc electrode tip coupled to the electrode lead inside the interior chamber.
Abstract:
A system, in certain embodiments, includes a high intensity discharge lamp having a composite leg. The composite leg includes a plurality of leg sections coupled together in series. The plurality of leg sections includes different materials, coefficients of thermal expansion, Poisson's ratios, or elastic moduli, or a combination thereof. A method, in certain embodiments, includes enclosing a high intensity discharge within a ceramic arc envelope. The method also includes reducing thermal stresses associated with the high intensity discharge via a composite leg extending outwardly from the ceramic arc envelope. The composite leg includes a plurality of leg sections coupled together in series. The plurality of leg sections includes different materials, coefficients of thermal expansion, Poisson's ratios, or elastic moduli, or a combination thereof.
Abstract:
A method of making a multi-cation ceramic having an average grain size of less than 1 micron is provided. The method includes the steps of providing at least a first material and a second material, wherein the first material comprises a first cation and the second material comprises a second cation, and wherein the first cation and the second cation are different from each other and each of the first material and the second material are nanopowders; forming a mixture comprising the first material and the second material; forming a green body from the mixture; and forming a dense multi-cation ceramic material comprising the first cation and the second cation, wherein the dense multi-cation ceramic material comprises a major phase comprising the first cation and the second cation and that is different from the first material and the second material. The multi-cation ceramic has a high density and high in-line transmission.
Abstract:
A ceramic bonding composition comprises a first oxide and at least a second oxide having a formula of Me 2 O 3 ; wherein the first oxide is selected from the group consisting of aluminum oxide, scandium oxide, and combinations thereof; Me is selected from the group consisting of yttrium, lanthanum, cerium, praseodymium, neodymium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, lutetium, and combinations thereof. The ceramic bonding composition can further comprise silica. An article of manufacture comprising at least two members attached together with the ceramic bonding composition.
Abstract translation:陶瓷粘合组合物包含第一氧化物和至少第二氧化物,所述第二氧化物的分子式为Me 2 SUB 3 3, 其中所述第一氧化物选自由氧化铝,氧化钪及其组合组成的组; Me选自钇,镧,铈,镨,钕,钐,铕,钆,铽,镝,hol,铒,th,镱,l及其组合。 陶瓷粘合组合物可以进一步包含二氧化硅 一种制品包括至少两个与陶瓷粘合组合物连接在一起的构件。
Abstract:
Ceramic matrix composite articles include, for example a first plurality of plies of ceramic fibers in a ceramic matrix defining a first extent, and a local at least one second ply in said ceramic matrix defining a second extent on and/or in said first plurality of plies with the second extent being less than said first extent. The first plurality of plies has a first property, the at least one second ply has at least one second property, and said first property being different from said at least one second property. The different properties may include one or more different mechanical (stress/strain) properties, one or more different thermal conductivity properties, one or more different electrical conductivity properties, one or more different other properties, and combinations thereof.