公开(公告)号：US09966156B2

公开(公告)日：2018-05-08

申请号：US15535071

申请日：2015-12-17

Applicant: COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES ,  AREVA NC

Inventor： Stéphane Vaudez

IPC: G21C21/02 ,  C01G56/00 ,  G21C3/62 ,  G21C3/04

CPC classification number: G21C21/02 ,  C01G56/007 ,  C01P2002/50 ,  C01P2006/44 ,  C04B35/50 ,  C04B35/51 ,  C04B35/62204 ,  C04B35/64 ,  C04B2235/3229 ,  C04B2235/6562 ,  C04B2235/6565 ,  C04B2235/6567 ,  C04B2235/658 ,  C04B2235/6582 ,  C04B2235/6588 ,  C04B2235/663 ,  C04B2235/721 ,  C04B2235/77 ,  G21C3/04 ,  G21C3/62 ,  G21C3/623 ,  G21C2003/045 ,  Y02E30/38

Abstract: The present invention relates to a process for sintering a compacted powder of at least one oxide of a metal selected from an actinide and a lanthanide, this process comprising the following successive steps, carried out in a furnace and under an atmosphere comprising an inert gas, dihydrogen and water: (a) a temperature increase from an initial temperature TI up to a hold temperature TP, (b) maintaining the temperature at the hold temperature TP, and (c) a temperature decrease from the hold temperature TP down to a final temperature TF, in which the P(H2)/P(H2O) ratio is such that: 500

公开(公告)号：US20160049211A1

公开(公告)日：2016-02-18

申请号：US14012242

申请日：2013-08-28

Applicant: Ceramic Tubular Products, LLC

Inventor： Herbert Feinroth ,  Matthew W. Ales ,  Gregory T. Markham

IPC: G21C3/07

CPC classification number: G21C3/07 ,  C04B35/51 ,  C04B2235/32 ,  C23C16/26 ,  C23C16/325 ,  C23C28/046 ,  G21C21/02 ,  Y02E30/40

Abstract: A nuclear fuel element for use in water-cooled nuclear power reactors and an improved multilayered silicon carbide tube for use in water-cooled nuclear power reactors and other high temperature, high strength thermal tubing applications including solar energy collectors. The fuel element includes a multilayered silicon carbide cladding tube. The multilayered silicon carbide cladding tube includes (i) an inner layer; (ii) a central layer; and (iii) a crack propagation prevention layer between the inner layer and the central layer. A stack of individual fissionable fuel pellets may be located within the cladding tube. In addition, a thermally conductive layer may be deposited within the cladding tube between the inner layer of the cladding tube and the stack of fuel pellets. The multilayered silicon carbide cladding tube may also be adapted for other high temperature, high strength thermal tubing applications including solar energy collectors.

Abstract translation: 用于水冷核反应堆的核燃料元件和用于水冷核反应堆和其他高温，高强度热管应用的改进的多层碳化硅管，包括太阳能收集器。 燃料元件包括多层碳化硅包层管。 多层碳化硅包层管包括（i）内层; （ii）中心层; 和（iii）内层和中心层之间的裂纹扩展防止层。 单个可裂变燃料颗粒的堆叠可以位于包层管内。 此外，导热层可以在包壳管内部包覆管的内层和燃料粒料堆之间沉积。 多层碳化硅包覆管也可适用于其它高温，高强度的热管应用，包括太阳能收集器。

公开(公告)号：US20150054184A1

公开(公告)日：2015-02-26

申请号：US13971157

申请日：2013-08-20

Applicant: Los Alamos National Security, LLC

Inventor： Ching-Fong Chen

IPC: C04B35/51 ,  C04B35/645

CPC classification number: C04B35/51 ,  C01F15/00 ,  C01F17/0043 ,  C01G43/00 ,  C01G43/01 ,  C01G56/00 ,  C01G56/005 ,  C01P2004/03 ,  C01P2004/50 ,  C01P2004/60 ,  C01P2004/61 ,  C01P2004/82 ,  C01P2006/10 ,  C01P2006/12 ,  C04B35/6262 ,  C04B35/62695 ,  C04B2235/3229 ,  C04B2235/5409 ,  C04B2235/604 ,  C04B2235/608 ,  C04B2235/77

Abstract: A mixture of fine powder including thorium oxide was converted to granulated powder by forming a first-green-body and heat treating the first-green-body at a high temperature to strengthen the first-green-body followed by granulation by crushing or milling the heat-treated first-green-body. The granulated powder was achieved by screening through a combination of sieves to achieve the desired granule size distribution. The granulated powder relies on the thermal bonding to maintain its shape and structure. The granulated powder contains no organic binder and can be stored in a radioactive or other extreme environment. The granulated powder was pressed and sintered to form a dense compact with a higher density and more uniform pore size distribution.

Abstract translation: 将包括氧化钍在内的细粉末的混合物通过形成第一生体并在高温下热处理第一生体而将其转化成粒状粉末，以加强第一生体，然后通过粉碎或研磨制粒 热处理的第一生体。 颗粒粉末通过筛选组合来实现，以获得所需的颗粒尺寸分布。 造粒粉末依赖于热粘合以保持其形状和结构。 造粒粉末不含有机粘合剂，可放置在放射性或其他极端环境中。 将造粒粉末压制并烧结以形成具有更高密度和更均匀孔径分布的致密成型体。

公开(公告)号：US20140183765A1

公开(公告)日：2014-07-03

申请号：US13849117

申请日：2013-03-22

Applicant: Purdue Reseach Foundation ,  The Texas A&M University System

Inventor： Alvin A. Solomon ,  Huthavahana S. Kuchibhotla ,  Shripad T. Revankar ,  Sean Marshall McDeavitt ,  Jean Concetto Ragusa

IPC: G21C21/02 ,  C04B35/626 ,  C04B35/64 ,  G21C3/62

CPC classification number: G21C21/02 ,  C04B35/51 ,  C04B35/62204 ,  C04B35/6261 ,  C04B35/62695 ,  C04B35/6281 ,  C04B2235/32 ,  C04B2235/3205 ,  C04B2235/528 ,  C04B2235/5427 ,  C04B2235/6582 ,  C04B2235/77 ,  G21C3/623 ,  Y02E30/38

Abstract: A process of producing ceramic-ceramic composites, including but not limited to nuclear fuels, and composites capable of exhibiting increased thermal conductivities. The process includes milling a first ceramic material to produce a powder of spheroidized particles of the first ceramic material, and then co-milling particles of a second ceramic material with the spheroidized particles of the first ceramic material to cause the particles of the second ceramic material to form a coating on the spheroidized particles of the first material. The spheroidized particles coated with the particles of the second ceramic material are then compacted and sintered to form the ceramic-ceramic composite, in which the second ceramic material forms a continuous phase completely surrounding the spheroidized particles of the first ceramic material.

Abstract translation: 一种生产陶瓷 - 陶瓷复合材料的方法，包括但不限于核燃料，以及能够表现出增加的热导率的复合材料。 该方法包括研磨第一陶瓷材料以产生第一陶瓷材料的球化颗粒的粉末，然后将第二陶瓷材料的颗粒与第一陶瓷材料的球化颗粒共同研磨以使第二陶瓷材料的颗粒 以在第一材料的球化颗粒上形成涂层。 然后将涂覆有第二陶瓷材料的颗粒的球状颗粒压实并烧结以形成陶瓷 - 陶瓷复合材料，其中第二陶瓷材料形成完全围绕第一陶瓷材料的球化颗粒的连续相。

公开(公告)号：US4816187A

公开(公告)日：1989-03-28

申请号：US22032

申请日：1987-03-05

Applicant: Richard I. Larson ,  Richard P. Ringle

Inventor： Richard I. Larson ,  Richard P. Ringle

IPC: C04B35/51 ,  G21C3/62 ,  G21C21/00 ,  C07F5/00 ,  C09K11/04

CPC classification number: C04B35/51 ,  G21C3/623 ,  Y02E30/38

Abstract: A fugitive binder composition for compression molding uranium dioxide nuclear fuel comprising the reaction product of a strongly alkali water solution of a diamine and oxalate ions with uranium oxide which is free of carbonates and carbamates, and having the formula:[.sup.+ NH.sub.3 (CH.sub.2).sub.2 NH.sub.3.sup.+ ][UO.sub.2 (C.sub.2 O.sub.4).sub.2 (H.sub.2 O).sub.2 ][.sup.+ NH.sub.3 (CH.sub.2).sub.2 NH.sub.3.sup.+ ].

Abstract translation: 一种用于压缩二氧化铀核燃料的短暂的粘结剂组合物，其包含二胺和草酸根离子的强碱性水溶液与不含碳酸盐和氨基甲酸酯的氧化铀的反应产物，并具有下式：[+ NH 3（CH 2）2 NH 3 + ] [＆upbar＆UO2（C2O4）2（H2O）2] [+ NH3（CH2）2NH3 +]。

公开(公告)号：US4432915A

公开(公告)日：1984-02-21

申请号：US360630

申请日：1982-03-22

Applicant: Timothy J. Gallivan

Inventor： Timothy J. Gallivan

IPC: C04B35/51 ,  G21C3/62 ,  G21C21/00

CPC classification number: G21C3/623 ,  C04B35/51 ,  Y02E30/38

Abstract: A method for improving the physical properties of pressed bodies or pellets formed of particulate nuclear fuel material containing uranium dioxide. The green or unfired pressed bodies comprise a fugitive binder dispersed through the particulate fuel material.

Abstract translation: 一种用于改善由含有二氧化铀的颗粒状核燃料材料形成的压制体或丸粒的物理性质的方法。 绿色或未烧制的压制体包括分散在颗粒状燃料材料中的短效粘合剂。

公开(公告)号：US4427579A

公开(公告)日：1984-01-24

申请号：US331492

申请日：1981-12-17

Applicant: George L. Gaines, Jr. ,  Patricia A. Piacente ,  William J. Ward, III ,  Peter C. Smith ,  Timothy J. Gallivan ,  Harry M. Laska

Inventor： George L. Gaines, Jr. ,  Patricia A. Piacente ,  William J. Ward, III ,  Peter C. Smith ,  Timothy J. Gallivan ,  Harry M. Laska

IPC: C04B35/51 ,  G21C3/00 ,  G21C3/62 ,  C09K3/00 ,  G21C21/00

CPC classification number: G21C3/623 ,  C04B35/51 ,  Y02E30/38

Abstract: A nuclear fuel material green body of density from about 30 to 70% of theoretical density having tensile strenght and plasticity adequate to maintain the integrity of the body during processing leading to ultimate sintered condition is produced by adding an amine carbonate or carbamate or mixture thereof to a particulate mass of the nuclear fuel material under conditions resulting in reaction with the amine compound to form a water-soluble compound effective as a binder for the particulate material.

Abstract translation: 通过将碳酸胺或氨基甲酸酯或其混合物加入到其中来制备密度为约30至70％的具有拉伸强度和塑性的核燃料材料生坯，所述拉伸强度和塑性足以在加工过程中保持最终烧结条件下的物体完整性 在与胺化合物反应的条件下，核燃料材料的颗粒物质形成有效作为颗粒材料的粘合剂的水溶性化合物。

公开(公告)号：US4426338A

公开(公告)日：1984-01-17

申请号：US274793

申请日：1981-06-18

Applicant: Karl-Gerhard Hackstein ,  Milan Hrovat ,  Hans Huschka ,  Karl-Heinz Koch

Inventor： Karl-Gerhard Hackstein ,  Milan Hrovat ,  Hans Huschka ,  Karl-Heinz Koch

IPC: C04B35/51 ,  G21C3/36 ,  G21C3/62 ,  G21C21/00

CPC classification number: C04B35/51 ,  G21C3/623 ,  Y02E30/38

Abstract: For the production of plate shaped fuel elements for material testing and research reactors with highly enriched uranium recently there has been needed U.sub.3 O.sub.8 fuels which have a high density, high strength and a small open porosity. Such fuels are obtained if U.sub.3 O.sub.8 powder produced in known manner is first compressed mechanically to molded bodies of any shape, then processed to a granulate having a size of fuel grains below 200.mu. and subsequently sintered to high density particles, preferably at 1370.degree..+-.50.degree. C.

Abstract translation: 最近生产用于具有高浓缩铀的材料试验和研究堆的板状燃料元件需要具有高密度，高强度和小开孔度的U3O8燃料。 以已知方式制备的U3O8粉末首先被机械压制成任何形状的成型体，然后加工成具有低于200μm的燃料颗粒尺寸的颗粒并随后烧结成高密度颗粒，优选1370℃/ -50℃

公开(公告)号：US4392970A

公开(公告)日：1983-07-12

申请号：US345530

申请日：1982-02-03

Applicant: Hiromu Ouchi ,  Masamitsu Nishida ,  Kazunori Numata

Inventor： Hiromu Ouchi ,  Masamitsu Nishida ,  Kazunori Numata

IPC: C04B35/49 ,  C04B35/46 ,  C04B35/48 ,  C04B35/50 ,  C04B35/51 ,  H01B3/12 ,  H01G7/02 ,  H01L41/18 ,  H01L41/187

CPC classification number: H01G7/026 ,  C04B35/46 ,  C04B35/48 ,  C04B35/50 ,  C04B35/51 ,  H01L41/1876

Abstract: Ceramic materials within particular ranges of the ternary system Pb(Sn.sub.1/3 Sb.sub.2/3) O.sub.3 -PbTiO.sub.3 -PbZrO.sub.3 in solid solution form exhibit high planar coupling coefficient along with high dielectric constant, and are useful in electromechanical transducers. The ceramic materials are those within the area A, B, C, D, E and F of FIG. 2.

Abstract translation: 在固溶体形式的三元体系Pb（Sn1 / 3Sb2 / 3）O3-PbTiO3-PbZrO3的特定范围内的陶瓷材料表现出高平面耦合系数以及高介电常数，并且可用于机电换能器。 陶瓷材料是图1的区域A，B，C，D，E和F中的陶瓷材料。 2。

公开(公告)号：US4175117A

公开(公告)日：1979-11-20

申请号：US801727

申请日：1977-01-17

Applicant: Brian Hill

Inventor： Brian Hill

IPC: C04B33/02 ,  C04B35/00 ,  C04B35/111 ,  C04B35/26 ,  C04B35/46 ,  C04B35/48 ,  C04B35/50 ,  C04B35/51 ,  H01F1/03 ,  H01F1/09 ,  B02C19/12

CPC classification number: H01F1/09 ,  C04B33/02 ,  C04B35/00 ,  C04B35/111 ,  C04B35/26 ,  C04B35/46 ,  C04B35/48 ,  C04B35/50 ,  C04B35/51 ,  H01F1/0306

Abstract: A process and products produced thereby, e.g., ferrites, in which ceramic powder particles are subjected to high transmissive energy milling under dry conditions and with given ratios of impacting media to powder, the milling being conducted for a period beyond the threshold point of the powder constituents, whereby dense, composite powder particles are obtained having an interdispersion of initial constituent particles, a large internal interfacial surface within individual product powder particles, etc.

Abstract translation: 由此产生的方法和产品，例如铁氧体，其中陶瓷粉末颗粒在干燥条件下经受高透射能量研磨，并且以给定的比例将冲击介质与粉末进行比较，研磨进行超过粉末的阈值点 得到具有初始组分颗粒的分散体，单个产品粉末颗粒内的大的内部界面表面等的致密的复合粉末颗粒。