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公开(公告)号：US5006504A
公开(公告)日：1991-04-09
申请号：US399649
申请日：1989-08-28
CPC分类号： H01L39/2419 , B01D19/04 , B01D19/0404 , C01G3/006 , C04B35/4508 , C01P2002/72 , C01P2004/61 , Y10S505/739 , Y10S505/78
摘要： A process for the preparation of superconducting ceramic materials by a solid state reaction technique. The process is especially suited for production of powders including .gtoreq.95% of Ba.sub.2 YCu.sub.3 O.sub.7 for use in producing sintered ceramic bodies including >99% Ba.sub.2 YCu.sub.3 O.sub.7. The process includes the steps of (a) wet milling raw powders of starting ingredients, including oxides and/or carbonates or the respective ions, to form a milled slurry, (b) separating particulate solids from the liquids of the slurry, the separating including continuously agitating the mixed slurry so as to avoid segregation of the milled ingredients and spray drying the milled slurry to produce spray dryed particles, (c) calcining the separated particles in oxygen to form calcined powder, (d) optionally remilling the calcined powder, (e) forming the calcined powder into a suitable form body and (f) sintering the formed body in oxygen; preferably said separating step including spray drying the agitated, milled slurry. The above process results in calcined material including .gtoreq.95% of a single phase material (Ba.sub.2 YCu.sub.3 O.sub.7) and a small amount e.g. 3%, of a single second phase material and leads to a sintered ceramic which is .gtoreq.99% single phase material.
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公开(公告)号：US5538800A
公开(公告)日：1996-07-23
申请号：US315160
申请日：1994-09-29
CPC分类号： H01L43/10 , Y10S428/90 , Y10T428/1107
摘要： Materials of composition La.sub.v X.sub.w M.sub.y Mn.sub.z O.sub.x, with x selected from Mg, Sc, Al, Zn, Cd, In and the rare earths that have an ionic radius smaller than that of La, with M selected from Ca, Sr, Ba and Pb, and with v, w, y, z and x in the ranges 0.45-0.85, 0.01-0.20, 0.20-0.45, 0.7-1.3 and 2.5-3.5, respectively, can have substantially improved magnetoresistance (MR) ratios, as compared to the corresponding X-free comparison material. In particular, the novel materials in polycrystalline (or non-epitaxial thin film) form can have relatively large MR ratios. For instance, polycrystalline La.sub.0.60 Y.sub.0.07 Ca.sub.0.33 MnO.sub.x had a peak MR ratio in excess of 10,000% (in absolute value) in a field of 6 T.
摘要翻译： 组成材料LavXwMyMnzOx，x选自Mg，Sc，Al，Zn，Cd，In以及离子半径小于La的稀土，M选自Ca，Sr，Ba和Pb，以及v 分别为0.45-0.85,0.01-0.20,0.20-0.45,0.7-1.3和2.5-3.5的范围内的w，y，z和x可以具有基本上改善的磁阻（MR）比， 免费比较材料。 特别地，多晶（或非外延薄膜）形式的新型材料可以具有相对大的MR比。 例如，多晶La0.60Y0.07Ca0.33MnOx在6T的场中具有超过10,000％（绝对值）的峰值MR比。
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公开(公告)号：US5389428A
公开(公告)日：1995-02-14
申请号：US987515
申请日：1992-12-08
申请人： Debra A. Fleming , Gideon S. Grader , David W. Johnson, Jr. , Henry M. O'Bryan, Jr. , Warren W. Rhodes
发明人： Debra A. Fleming , Gideon S. Grader , David W. Johnson, Jr. , Henry M. O'Bryan, Jr. , Warren W. Rhodes
IPC分类号： C04B35/622 , C04B35/26 , C04B41/87 , H01F17/00 , H01F17/04 , H01F27/02 , H01F41/16 , H01G4/12 , H01F41/02
CPC分类号： H01F17/0033 , H01F17/0013 , H01F17/04 , H01F27/027 , H01F41/16 , H01F2017/048 , Y10S428/90 , Y10T428/24917
摘要： This invention is predicated upon applicants' discovery that conventional techniques for minimizing metal loss from sintered ceramic materials are not adequate in the fabrication of small ceramic components such as multilayer monolithic magnetic devices wherein a magnetic core is substantially surrounded by an insulating housing. Applicants have determined that this metal loss problem can be solved by providing the component with a housing layer having an appropriate concentration of metal. Specifically, if the insulating housing material around the magnetic core has, during the high temperature firing, the same partial pressure of metal as the magnetic core material, there is no net loss of metal from the core. In a preferred embodiment, loss of zinc from a MnZn ferrite core is compensated by providing a housing of NiZn ferrite or zinc aluminate with appropriate Zn concentrations. Similar considerations apply to other ceramic components.
摘要翻译： 本发明基于申请人的发现，用于最小化烧结陶瓷材料的金属损耗的常规技术在制造小型陶瓷部件如多层单片磁性器件中是不够的，其中磁芯基本上被绝缘壳体包围。 申请人已经确定，通过为组件提供具有适当浓度金属的容纳层，可以解决该金属损失问题。 具体来说，如果磁芯周围的绝缘壳体材料在高温烧成时具有与磁心材料相同的金属分压，则不存在来自芯的金属的净损耗。 在优选的实施方案中，通过提供具有合适的Zn浓度的NiZn铁氧体或铝酸锌的壳体来补偿来自MnZn铁氧体磁心的锌的损失。 类似的考虑也适用于其他陶瓷组件。
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公开(公告)号：US4337446A
公开(公告)日：1982-06-29
申请号：US160108
申请日：1980-06-16
IPC分类号： C04B35/468 , C04B35/64 , H01P7/10 , H01P3/08 , C01G23/00
CPC分类号： H01P7/10 , C04B35/4686 , C04B35/64
摘要： A process is described for the preparation of ceramic dielectrics for microwave applications which yield high quality (Q) factors, high dielectric stability and excellent mechanical stability. The procedure is particularly useful where the size of the ceramic dielectric structures is large (average diameter greater than one inch).
摘要翻译： 描述了制备用于微波应用的陶瓷电介质的方法，其产生高质量（Q）因子，高介电稳定性和优异的机械稳定性。 当陶瓷电介质结构的尺寸大（平均直径大于1英寸）时，该方法特别有用。
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公开(公告)号：US4563661A
公开(公告)日：1986-01-07
申请号：US686240
申请日：1984-12-26
CPC分类号： H01P7/10
摘要： Devices are described which incorporate dielectric material with unusually low (and sometimes negative) temperature coefficient of dielectric constant. Such materials make possible the fabrication of microwave devices which remain stable with changing temperature. This is particularly useful for stabilization of frequency in microwave sources. Stabilization results from the incorporation of small amounts of tin in ceramic material containing mostly Ba.sub.2 Ti.sub.9 O.sub.20.
摘要翻译： 描述了包含具有非常低的（有时是负的）介电常数温度系数的电介质材料的器件。 这种材料使得可以制造在温度变化时保持稳定的微波装置。 这对于稳定微波源中的频率特别有用。 稳定化是由于在大部分为Ba2Ti9O20的陶瓷材料中掺入少量锡。
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公开(公告)号：US4175060A
公开(公告)日：1979-11-20
申请号：US854813
申请日：1977-11-25
CPC分类号： H01C7/025
摘要： A ceramic composition and processing procedure is described which is useful in electric and electronic devices such as thermistors. The ceramic composition, which may be described as a semiconducting barium titanate, exhibits a large positive temperature coefficient of resistance. Advantages are ease and convenience of fabrication with lower sintering temperature than conventional processing and use of an air atmosphere instead of nitrogen or oxygen atmospheres. This facilitates batch processing and permits convenient sintering in a continuous kiln.
摘要翻译： 描述了一种在诸如热敏电阻之类的电气和电子设备中有用的陶瓷组合物和加工方法。 可以描述为半导体钛酸钡的陶瓷组合物表现出大的正温度系数电阻。 优点是比常规处理和使用空气气氛而不是氮气或氧气氛更低的烧结温度来制造的便利性和便利性。 这有利于批量处理，并允许在连续窑中方便地烧结。
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公开(公告)号：US4725330A
公开(公告)日：1988-02-16
申请号：US731099
申请日：1985-05-06
CPC分类号： G02B6/1342 , C30B31/02
摘要： A process is described for producing optical integrated circuits on lithium niobate substrates in which the composition of the lithium niobate substrates is adjusted by a powder bed equilibration procedure. This procedure involved exposure of the lithium niobate crystals to a powder bed in a crucible during a heat treatment. A similar procedure is used during production of optical integrated circuits to maintain the desired Li/Nb composition in the substrate.
摘要翻译： 描述了在铌酸锂基底上制造光学集成电路的方法，其中通过粉末床平衡方法调节铌酸锂基底的组成。 该方法包括在热处理期间将铌酸锂晶体暴露于坩埚中的粉末床。 在制造光学集成电路期间使用类似的过程来在衬底中保持所需的Li / Nb组成。
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公开(公告)号：US5212395A
公开(公告)日：1993-05-18
申请号：US844264
申请日：1992-03-02
申请人： Paul R. Berger , Alfred Y. Cho , Niloy K. Dutta , John Lopata , Henry M. O'Bryan, Jr. , Deborah L. Sivco , George J. Zydzik
发明人： Paul R. Berger , Alfred Y. Cho , Niloy K. Dutta , John Lopata , Henry M. O'Bryan, Jr. , Deborah L. Sivco , George J. Zydzik
IPC分类号： H01L31/10 , H01L31/0216 , H01L31/0224 , H01L31/105
CPC分类号： H01L31/022466 , H01L31/02161 , H01L31/105
摘要： This invention pertains to a p-i-n In.sub.0.53 Ga.sub.0.47 As photodiode having an optically transparent composite top electrode consisting of a thin semitransparent metal layer from 10 to 40 nm thick and a transparent cadmium tin oxide (CTO) layer from 90 to 600 nm thick. The metal layer makes a non-alloyed ohmic contact to the semiconductor surface, acts as a barrier between the semiconductor and the CTO preventing oxidation of the semiconductor from the O.sub.2 in the plasma during reactive magnetron sputtering of the CTO layer, and prevents formation of a p-n junction between the semiconductor and CTO. The CTO functions as the n or p contact, an optical window and an anti-reflection coating. The top electrode also avoids shadowing of the active layer by the top electrode, thus allowing greater collection of incident light. Since the top electrode is non-alloyed, inter-diffusion into the i-region is not relevant, which avoids an increased dark current.
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公开(公告)号：US5115441A
公开(公告)日：1992-05-19
申请号：US637245
申请日：1991-01-03
申请人： Rose F. Kopf , Henry M. O'Bryan, Jr. , Erdmann F. Schubert , Li-Wei Tu , Yeong-Her Wang , George J. Zydzik
发明人： Rose F. Kopf , Henry M. O'Bryan, Jr. , Erdmann F. Schubert , Li-Wei Tu , Yeong-Her Wang , George J. Zydzik
CPC分类号： B82Y20/00 , H01S5/18308 , H01S2301/18 , H01S5/0425 , H01S5/06216 , H01S5/2063 , H01S5/3432
摘要： Optically transparent and electrically conductive cadmium tin oxide or indium tin oxide is employed in vertical cavity surface emitting lasers for vertical current injection. Continuous wave lasing at room temperature is achieved in GaAs/AlGaAs quantum well lasers. Devices with a 10 .mu.m optical window which also serves as a vertical current injection inlet give lasing threshold currents as low as 3.8 mA. The differential series resistance is (350-450) .OMEGA. with a diode voltage of (5.1-5.6) V at the lasing threshold. Far field pattern of the laser emission is Gaussian-like with a full width at half maximum of 7.degree..
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