公开(公告)号：US10651000B2

公开(公告)日：2020-05-12

申请号：US15409888

申请日：2017-01-19

Applicant: Beijing University of Technology

Inventor： Wei Liu ,  Mingchaung Tian ,  Jinshu Wang ,  Fan Zhou ,  Yiman Wang ,  Liran Dong ,  Yunfei Yang ,  Quan Zhang

IPC: B22F3/105 ,  H01J9/04 ,  B22F9/02 ,  B22F9/22 ,  C22B34/36 ,  B22F9/30 ,  H01J1/28 ,  H01J19/22 ,  H01J35/06

Abstract: The present disclosure discloses a preparation method of pressed Scandia-doped dispenser cathode using microwave sintering. Embodiments of the present disclosure include dissolving some nitrates and ammonium metatungstate with deionized water to prepare a homogeneous solution. Precursor powder with uniform size is obtained by spray drying, the precursor powder is decomposed, and two-step reduction may be proceeded to form doped tungsten powder with uniform element distribution. The cathode is prepared by one-time microwave sintering. One-time forming of cathode sintering is realized, and sintering shrinkage and sintering time are reduced significantly. The method has excellent repeatability, and the cathode has a homogeneous structure and excellent emission performance at 950° C.

公开(公告)号：US20210040153A1

公开(公告)日：2021-02-11

申请号：US16959669

申请日：2018-12-28

Applicant: Beijing University of Technology

Inventor： Minglian Wang ,  Jinsong Li ,  Qun Wang ,  Yishu Yang ,  Jintao Li ,  Wei Liu ,  Xiangqian Xiao ,  Xiaojin Su

IPC: C07K7/06 ,  C07K5/09 ,  C07K5/11

Abstract: The present invention relates to the field of virology, and specifically discloses a short peptide having a dengue virus replication inhibition function and an application thereof. The amino acid sequence of the short peptide provided in the present invention is KHGHHRH, i.e. Lys-His-Gly-His-His-Arg-His (SEQ ID NO. 1). The short peptide has a high specificity affinity with NS5 and has the function of efficiently inhibiting dengue virus replication, the anti-viral effect thereof not been limited to DENV-2, but also having a significant inhibitory effect on the replication of type 1, type 3, and type 4 dengue virus. One cysteine is added to the two ends of the short peptide sequence, the short peptide being cyclised by means of the cysteines at the two ends to form a cyclic peptide. The obtained cyclic peptide strengthens the dengue virus replication inhibition function, and can be used for specific treatment of dengue virus infection.

公开(公告)号：US20170345608A1

公开(公告)日：2017-11-30

申请号：US15409888

申请日：2017-01-19

Applicant: Beijing University of Technology

Inventor： Wei Liu ,  Mingchaung Tian ,  Jinshu Wang ,  Fan Zhou ,  Yiman Wang ,  Liran Dong ,  Yunfei Yang ,  Quan Zhang

IPC: H01J9/04 ,  B22F9/02 ,  B22F3/105 ,  C22B34/36 ,  B22F9/22 ,  H01J35/06 ,  H01J1/28 ,  H01J19/22

CPC classification number: H01J9/04 ,  B22F3/105 ,  B22F9/026 ,  B22F9/22 ,  B22F9/30 ,  B22F2003/1054 ,  B22F2998/10 ,  C22B34/36 ,  H01J1/28 ,  H01J19/22 ,  H01J35/06 ,  B22F3/02

Abstract: The present disclosure discloses a preparation method of pressed Scandia-doped dispenser cathode using microwave sintering. Embodiments of the present disclosure include dissolving some nitrates and ammonium metatungstate with deionized water to prepare a homogeneous solution. Precursor powder with uniform size is obtained by spray drying, the precursor powder is decomposed, and two-step reduction may be proceeded to form doped tungsten powder with uniform element distribution. The cathode is prepared by one-time microwave sintering. One-time forming of cathode sintering is realized, and sintering shrinkage and sintering time are reduced significantly. The method has excellent repeatability, and the cathode has a homogeneous structure and excellent emission performance at 950° C.

公开(公告)号：US09646796B1

公开(公告)日：2017-05-09

申请号：US14218680

申请日：2014-03-18

Applicant: BEIJING UNIVERSITY OF TECHNOLOGY

Inventor： Jin-Shu Wang ,  Wei Liu ,  Li-Ran Dong ,  Qiang Wang ,  Xiang Liu ,  Fan Zhou ,  Mei-Ling Zhou ,  Tie-Yong Zuo

IPC: H01J19/06 ,  H01K1/04 ,  H01J1/14 ,  H01J1/28 ,  H01J1/142 ,  H01J1/20 ,  H01J9/04

CPC classification number: H01J1/28 ,  H01J1/14 ,  H01J1/142 ,  H01J1/20 ,  H01J9/042

Abstract: A method of manufacturing carburized Lu2O3 doped Mo cathodes for thermionic emission for magnetrons is described. The Lu2O3 doped Mo powder is prepared by sol-gel method. The powder is reduced thoroughly in hydrogen atmosphere. Afterwards, the powder is die-pressed into pellets, followed by sintering in hydrogen and carburization in activated carbon powder to obtain the carburized Lu2O3 doped Mo cathode.