公开(公告)号：US06727787B2

公开(公告)日：2004-04-27

申请号：US10036859

申请日：2001-12-21

Applicant: Thomas M. Worth ,  Kaplesh Kumar

Inventor： Thomas M. Worth ,  Kaplesh Kumar

IPC: H01P700

CPC classification number: H01P11/008 ,  H01P7/06 ,  Y10T29/49016

Abstract: A device for manipulating microwave radiation includes a substrate that defines the shape of a surface for reflecting microwave radiation. The device also includes a metal fitting. The fitting conforms to the defined shape, and provides the surface that reflects microwave radiation.

Abstract translation: 用于操纵微波辐射的装置包括限定用于反射微波辐射的表面的形状的基板。 该装置还包括金属配件。 配件符合规定的形状，并提供反映微波辐射的表面。

公开(公告)号：US5044613A

公开(公告)日：1991-09-03

申请号：US478682

申请日：1990-02-12

Applicant: Kaplesh Kumar ,  Anthony Petrovich

Inventor： Kaplesh Kumar ,  Anthony Petrovich

IPC: B22F9/20 ,  B22F9/24 ,  H01F1/055 ,  H01F1/057

CPC classification number: H01F1/0573 ,  B22F9/20 ,  H01F1/0553 ,  B22F2998/10

Abstract: Method and apparatus for forming rare-earth magnets and magnet precursors of fine particle sized metal alloy powders with a high degree of metal to metal intimacy and homogeneity in the particle to particle metal composition. Salts of the desired metals which may include or be selected from zirconium, samarium, iron, cobalt, copper, neodymium and boron with nitric acid in a water based solution are atomized through a nozzle, which may be ultrasonic, into fine mist droplets form metal oxide particles which condense through a heated, atmospheric environment furnace. The furnace temperature is in a range of 600.degree. to 1150.degree. C. and causes decompositon of the metal salts along with their oxidation, driving off the liquid and nitrogen components along with other carrier materials. A very fine sized powder, typically micron dimension size powder of metal oxides, in which each particle represents a homogeneous proportion of the desired metal components, is collected in the bottom of the furnace. These fine particle metal oxide powders are subsequently reduced to metal alloy powder particles of similar homogeneity in the metal proportions. The reduction reaction typically utilizes calcium hydride in a hydrogen atmosphere to convert the metal oxides to metal alloy particles. The metal alloy powder is then aligned, compacted, densified and magnetized to produce magnets of high magnetic performance.

Abstract translation: 用于形成具有高金属对金属亲和性和颗粒金属组成均匀性的细粒度金属合金粉末的稀土磁体和磁体前体的方法和装置。 在水溶液中可以包括或选自锆，钐，铁，钴，铜，钕和硼与硝酸的所需金属的盐通过喷嘴（其可以是超声波）雾化成细小的雾滴形成金属 氧化物颗粒通过加热的大气环境炉冷凝。 炉温在600〜1150℃的范围内，并引起金属盐的分解及其氧化，与其他载体材料一起排出液氮组分。 典型地是微米尺寸的金属氧化物粉末，其中每个颗粒代表所需金属组分的均匀比例的粉末，被收集在炉底部。 随后将这些细颗粒金属氧化物粉末还原成金属比例相似均匀的金属合金粉末颗粒。 还原反应通常在氢气氛中使用氢化钙将金属氧化物转化为金属合金颗粒。 然后将金属合金粉末对准，压实，致密化和磁化，以产生高磁性能的磁体。

公开(公告)号：US4628809A

公开(公告)日：1986-12-16

申请号：US762708

申请日：1985-08-05

Applicant: Dilip K. Das ,  Kaplesh Kumar ,  Ernest C. Wettstein

Inventor： Dilip K. Das ,  Kaplesh Kumar ,  Ernest C. Wettstein

IPC: H01F1/08 ,  H01F41/02 ,  B30B15/14

CPC classification number: H01F1/08 ,  H01F41/026 ,  Y10S100/917 ,  Y10S264/58 ,  Y10S29/095 ,  Y10S428/928 ,  Y10T29/49078

Abstract: Apparatus and method for forming radial orientation rare earth-transition metal magnets in continuous arc rings by hot isostatic pressing. A method includes the steps of compacting rare earth-transition metal powders having a particle size up to 40 microns into radially oriented rings in a mold provided with a radially aligning field, stacking a plurality of compacted radially oriented rings within an annular cavity within a sealed, evacuated canister to form a cylinder of a predetermined height, subjecting the canister to temperatures in the range of 900.degree. to 1150.degree. C. under a gas pressure of 15 kpsi to densify the compacts, and cooling the canister and the compacts to room temperature. An apparatus for performing the above-described method, includes a mold for forming green compacts having a central iron core or mandrel, as outer housing forming an annular space between it and the iron mandrel, plungers for compacting into a ring rare earth-transition metal powder within the annular space, and means for forming a radially oriented magnetic field. The magnetic field forming means includes a pair of electromagnetic coils with bucking fields disposed on opposite axial ends of the annular space. Ferromagnetic paths guide the flux through the inner and outer walls of the mold and through the powder to form a radial field for powder alignment. A canister is used for forming magnets from the green compacts and the canister is typically composed of a soft iron that will collapse around the magnets and transmit compressive forces to the green compacts for densification thereof. The canister includes an annular space for stacking green compacts bounded by inner and outer walls and an evacuation tube. A central mandrel may be provided if a ring magnet having a predetermined inner diameter is desired.

Abstract translation: 通过热等静压法在连续弧环中形成径向定向稀土 - 过渡金属磁体的装置和方法。 一种方法包括以下步骤：在具有径向对准场的模具中将粒径达40微米的稀土过渡金属粉末压实成径向取向的环，将多个压实的径向取向的环在密封的环形空腔内堆叠 ，抽真空的罐形成预定高度的圆筒，在罐内压力为15kpsi的条件下，对罐进行900〜1150℃的温度，使压实体致密化，并将其冷却至室温 。 一种用于执行上述方法的设备包括：用于形成具有中心铁芯或心轴的生坯的模具，作为在其与铁心之间形成环形空间的外壳，用于压实成环稀土过渡金属的柱塞 在环形空间内的粉末，以及用于形成径向取向的磁场的装置。 磁场形成装置包括一对电磁线圈，其具有设置在环形空间的相对轴向端部上的屈曲磁场。 铁磁路径引导焊剂通过模具的内壁和外壁，并通过粉末形成用于粉末对准的径向场。 碳罐用于从生坯中形成磁体，并且罐通常由软铁构成，软铁将围绕磁体塌陷并将压缩力传递到生坯上以使其致密化。 罐包括用于堆叠由内壁和外壁界定的生坯的排出管的环形空间。 如果期望具有预定内径的环形磁体，则可以提供中心心轴。

公开(公告)号：US4565686A

公开(公告)日：1986-01-21

申请号：US502535

申请日：1983-06-13

Applicant: Kaplesh Kumar

Inventor： Kaplesh Kumar

IPC: C01B3/00 ,  C01B6/24

CPC classification number: C01B3/0005 ,  C01B3/0057 ,  C01B3/0063 ,  C01B3/0068 ,  Y02E60/327 ,  Y10S420/90

Abstract: A nonequilibrium state material, typically a rare-earth-transition metal, for reversible hydrogen storage. A rare earth-transition metal such as a rare earth cobalt alloy, like a samarium-cobalt or a lanthanum-nickel alloy, is provided in the amorphous or metastable crystalline state as a hydrogen absorbing material, particularly for use in a hydrogen storage and retrieval system, such as a fluidized bed or stacked plate hydrogen storage cell. The rare-earth-transition metal material is rapidly cooled from the liquid state to avoid the transition to a full crystalline state thereby obtaining an amorphous or quasi-stable crystalline state material which has the property of enhanced hydrogen storage capacity as well as being substantially immune to fracturing.

Abstract translation: 用于可逆氢存储的非平衡状态材料，通常是稀土 - 过渡金属。 非晶态或亚稳态的稀土钴合金，如稀土钴合金，如钐钴或镧镍合金，提供了一种稀土 - 过渡金属作为吸氢材料，尤其用于氢储存和回收 系统，如流化床或堆叠板式储氢池。 稀土过渡金属材料从液态快速冷却，以避免过渡到全晶状态，从而获得具有提高储氢能力以及基本上免疫的性质的无定形或准稳态结晶态材料 压裂。