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31 条记录 (耗时 0.02 秒)

    USE OF RARE EARTH FLUORIDE SINGLE CRYSTAL IN MAGNETIC REFRIGERATION
    1.
    发明公开
    USE OF RARE EARTH FLUORIDE SINGLE CRYSTAL IN MAGNETIC REFRIGERATION 审中-公开

    公开(公告)号：EP4450896A1

    公开(公告)日：2024-10-23

    申请号：EP23794836.9

    申请日：2023-03-16

    申请人： Institute of Metal Research, Chinese Academy of Sciences ,  National Institute for Materials Science

    发明人： LI, Bing ,  YUAN, Dongsheng ,  LIU, Peng ,  GARCIA VILLORA, Encarnacion Antonia ,  ZHANG, Zhidong ,  SHIMAMURA, Kiyoshi

    IPC分类号： F25B21/00 ,  C01F17/36

    摘要： The present invention relates to the field of magnetic functional materials. The present invention discloses a use of a rare earth fluoride single crystal in magnetic refrigeration, a magnetic refrigeration method and a magnetic refrigeration device. A magnetocaloric material of the series is lithium rare earth fluoride, with the chemical formula of LiREF 4 , wherein RE is one or more of rare earth elements gadolinium, terbium, dysprosium, holmium, erbium, thulium and ytterbium. A magnetocaloric material single crystal of the series has extremely strong magnetic anisotropy. By applying a varying magnetic field of 0-20kOe along the easy magnetization axis direction of the magnetocaloric material, LiGdF 4 , LiTbF 4 , LiHoF 4 , LiDyF 4 , LiErF 4 , LiYbF 4 and LiTmF 4 obtained isothermal magnetic entropy changes of 50.35J·kg -1 ·K -1 , 21.12J·kg -1 ·K -1 , 24.98J·kg -1 ·K -1 , 24.45J·kg -1 ·K -1 , 21.95J·kg- 1 ·K -1 , 14.7J·kg -1 ·K -1 and 0.692J·kg -1 ·K -1 , respectively, at 1.8K, 4K, 4K, 1.8K, 1.8K, 1.8K, and 18K. Wherein, the thermal conductivity of LiTbF 4 and LiErF 4 reaches 50W·K -1 ·m -1 at 25K.

    APPLICATION OF AMMONIUM ION-CONTAINING HALOGEN COMPOUND IN SOLID-STATE REFRIGERATION
    2.
    发明公开
    APPLICATION OF AMMONIUM ION-CONTAINING HALOGEN COMPOUND IN SOLID-STATE REFRIGERATION 审中-实审

    公开(公告)号：EP4349933A1

    公开(公告)日：2024-04-10

    申请号：EP22845183.7

    申请日：2022-07-12

    申请人： Institute Of Metal Research Chinese Academy Of Sciences

    发明人： LI, Bing ,  QI, Ji ,  ZHANG, Zhidong

    IPC分类号： C09K5/14

    摘要： The present invention aims to provide an application of an ammonium ion-containing halogen compound in solid-state refrigeration and a novel efficient solid-state refrigeration method driven by a pressure. The ammonium ion-containing halogen compound is characterized in that phase change can be induced with only a small pressure, resulting in a huge barocaloric effect, and the unit pressure thereof drives the phase-change temperature displacement as high as 0.81 Kmin-1. Ammonium iodide produces 89.07 J kg -1 K-1 isothermal entropy change under a pressure of 20 MPa; and the use of this material for a refrigeration cycle is far superior to other material systems having a barocaloric effec.

    METHOD FOR CONTINUOUSLY PREPARING GRAPHENE OXIDE NANOPLATELET
    4.
    发明公开
    METHOD FOR CONTINUOUSLY PREPARING GRAPHENE OXIDE NANOPLATELET 审中-公开

    公开(公告)号：EP3434645A1

    公开(公告)日：2019-01-30

    申请号：EP17769432.0

    申请日：2017-03-22

    申请人： Institute of Metal Research Chinese Academy of Sciences

    发明人： PEI, Songfeng ,  REN, Wencai ,  CHENG, Huiming

    IPC分类号： C01B32/184

    摘要： Provided is a method for continuously preparing graphene oxide nanoplatelets on the basis of an electrochemical treatment, comprising using a continuous graphite product such as a flexible graphite coil, strip or carbon fiber wire as a raw material, successively subjecting same to two step treatments, i.e. an electrochemical intercalation and an electrolytic oxidation stripping, under the drive of a feeding device, and stripping same into the graphene oxide nanoplatelets. The electrochemical intercalation is in a concentrated acid, using a graphite material as an anode and energizing under a soaking condition such that acid radical ions enter into graphite interlamination under the drive of an electric field, to form an intercalated graphite continuous material with Stage I or lower intercalation. The electrolytic stripping is using the intercalated continuous graphite material as an anode, energizing in an aqueous electrolyte solution to perform electrolytic stripping, and performing oxidation stripping on the intercalated graphite by utilizing oxygen generated by electrolyzing water displaced to interlamination, to obtain graphene oxide. The method has the following advantages: a product does not contain a metal impurity, the oxidation degree of graphene is controllable, the process is continuable and automatable, and the method is safe and has low emissions, etc.

    FORGING METHOD FOR HIGH-EFFICIENCY CLOSING OF POROUS DEFECTS IN STEEL INGOTS OR BILLETS
    6.
    发明公开
    FORGING METHOD FOR HIGH-EFFICIENCY CLOSING OF POROUS DEFECTS IN STEEL INGOTS OR BILLETS 审中-公开
    SCHMIEDEVERFAHREN ZUM HOCHEFFIZIENTEN VERSCHLIESSENPORÖSERDEFEKTE BEISTAHLBLÖ​​CKENODER BARREN

    公开(公告)号：EP2762247A1

    公开(公告)日：2014-08-06

    申请号：EP12833320.0

    申请日：2012-09-21

    申请人： Institute of Metal Research Chinese Academy of Sciences

    发明人： XU, Bin ,  SUN, Mingyue ,  LI, Dianzhong

    IPC分类号： B21J5/06

    CPC分类号： C21D7/13 ,  B21J1/02 ,  B21J5/022

    摘要： The present invention relates to the field of forging, and more particularly to a forging method which can heal the void in ingots or billets effectively. It can be used in open die forging process of ingots and billets of all shapes. Wide anvil radial forging method is used during forging, which uses two flat plates as upper and lower anvils. For ingots or billets with height-diameter ratio less than 2, the reduction ratio during wide anvil radial forging is 20% to 25%; for ingots or billets with height-diameter ratio larger than 2, the reduction ratio is 20% to 40%. This invention can heal the voids in the ingots or billets, especially the central porosities, which cannot be done by traditional forging methods. Moreover, this invention can also heal the voids in large height-diameter ratio ingots or billets using small reduction ratio.

    摘要翻译： 锻造领域本发明涉及锻造领域，更具体地说，涉及一种可以有效地锻炼坯料或坯料中的空隙的锻造方法。 可用于所有形状的锭和坯料的开模锻造工艺。 在锻造时使用宽砧径向锻造法，其使用两个平板作为上砧和下砧。 对于直径比小于2的锭或坯料，宽砧径向锻造时的减速比为20％〜25％; 对于高度比大于2的锭或坯料，减速比为20％至40％。 本发明可以治愈锭或坯料中的空隙，特别是中心孔隙，这不能用传统的锻造方法来完成。 此外，本发明还可以使用小的减速比来治疗大直径比的锭或坯料中的空隙。

    METHOD FOR ENHANCING SELF-FEEDING ABILITY OF HEAVY SECTION CASTING BLANK
    7.
    发明公开
    METHOD FOR ENHANCING SELF-FEEDING ABILITY OF HEAVY SECTION CASTING BLANK 审中-公开
    VERFAHREN ZUR VERBESSERUNG DERSELBSTSPEISUNGSFÄHIGKEITEINES SCHWERLAST-GUSSROHLINGS

    公开(公告)号：EP2656946A1

    公开(公告)日：2013-10-30

    申请号：EP11851813.3

    申请日：2011-06-30

    申请人： Institute of Metal Research Chinese Academy of Sciences

    发明人： LI, Dianzhong ,  LUAN, Yikun ,  FU, Paixian ,  XIA, Lijun ,  LI, Yiyi

    IPC分类号： B22D27/04 ,  B22D27/00 ,  B22D11/124

    CPC分类号： B22D25/06 ,  B22D11/124 ,  B22D11/22 ,  B22D27/04 ,  B22D30/00

    摘要： The present invention relates to the field of casting blank manufacturing, in particular to a method for enhancing the self-feeding ability of a heavy section casting blank, which can solve the problems of poor centre quality, surface crack and high rejection rate of the heavy section casting blanks in the prior art. By controlling the outer cooling conditions of different solidification stages of the casting blank, the present invention quickly solidifies and crusts the outer surface of the casting blank to increase the strength and prevent surface crack at first, and then performs thermal insulation on the casting blank surface such that large area of the core forms the mushy region such that the solidified layer of the casting blank surface is maintained at a relatively high temperature to facilitate realization of the plastic deformation, thus realizing synchronous solidification and solid movement in the subsequent solidification and shrinkage processes of the casting blank, fulfilling the aim of radial self-feeding of the high-temperature deformable metal, eliminating the inner shrinkage voids and surface crack, and obviously eliminating the inner shrinkage of the casting blank. The present invention is applicable to the heavy section metal castings, in particular to the round and square heavy section casting blanks which have a large height-diameter ratio and cannot eliminate the axis shrinkage pipe through the feeder head.

    摘要翻译： 本发明涉及铸造坯件制造领域，特别涉及一种提高重型铸造坯料的自给能力的方法，其可以解决中心质量差，表面裂纹和重质量的高废品率的问题 现有技术中的截面铸坯。 通过控制铸坯的不同凝固阶段的外部冷却条件，本发明快速凝固并结垢铸坯的外表面，以首先增加强度并防止表面裂纹，然后对铸坯表面进行绝热 使得大面积的芯形成糊状区域，使得铸坯表面的固化层保持在相对高的温度以便于实现塑性变形，从而在随后的凝固和收缩过程中实现同步凝固和固体运动 的铸坯，满足了高温可变形金属的径向自给式的目的，消除了内部收缩空隙和表面裂纹，明显地消除了铸坯的内部收缩。 本发明可应用于重型金属铸件，特别是适用于直径比大的圆形和方形重型铸件坯料，并且不能消除通过给料头的轴线收缩管。

    BAROCALORIC EFFECT-BASED ROOM-TEMPERATURE BAROCALORIC REFRIGERATOR
    9.
    发明公开
    BAROCALORIC EFFECT-BASED ROOM-TEMPERATURE BAROCALORIC REFRIGERATOR 审中-实审

    公开(公告)号：EP4382833A1

    公开(公告)日：2024-06-12

    申请号：EP22851544.1

    申请日：2022-01-19

    申请人： Institute of Metal Research, Chinese Academy of Sciences

    发明人： LI, Bing ,  SONG, Ruiqi ,  ZHANG, Zhidong

    IPC分类号： F25B23/00 ,  F25B49/00

    摘要： The present invention discloses a ambient temperature barocaloric refrigerating machine based on a barocaloric effect, which belongs to the technical field of refrigerating machines. The refrigerating machine comprises a high-precision high-pressure electric injection pump, a barocaloric element, heat exchange fluid, a cold end heat exchanger and a hot end heat exchanger. The phenomena of heat release after pressurization and heat absorption after depressurization are generated due to phase change through a barocaloric medium under the action of the high-pressure injection pump. The heat exchange fluid flows back and forth between the barocaloric refrigerators and exchanges heat and cold. The high-precision high-pressure electric injection pump of the present invention provides pressure for the barocaloric refrigeration cycle, and the pressure is constantly output. The pressurization form is fluid pressure, which well overcomes the defect of uneven transfer of mechanical pressure. The pressurization oil is also used as the heat exchange fluid and in direct contact with a sample. Pressure-driven heat and cold are directly brought into the hot end heat exchanger and the cold end heat exchanger to complete the cycle, thereby reducing the heat loss.