Method for preparing pressed scandia-doped dispenser cathodes using microwave sintering

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 10651000
APP PUB NO 20170345608A1
SERIAL NO

15409888

Stats

ATTORNEY / AGENT: (SPONSORED)

Importance

Loading Importance Indicators... loading....

Abstract

See full text

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.

Loading the Abstract Image... loading....

First Claim

See full text

Family

Loading Family data... loading....

Patent Owner(s)

Patent OwnerAddress
BEIJING UNIVERSITY OF TECHNOLOGY1OO PINGLEYUAN CHAOYANG DISTRICT BEIJING

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Dong, Liran Beijing, CN 2 0
Liu, Wei Beijing, CN 1976 15390
Tian, Mingchaung Beijing, CN 1 0
Wang, Jinshu Beijing, CN 4 5
Wang, Yiman Beijing, CN 2 4
Yang, Yunfei Beijing, CN 4 14
Zhang, Quan Beijing, CN 95 522
Zhou, Fan Beijing, CN 95 655

Cited Art Landscape

Load Citation

Patent Citation Ranking

Forward Cite Landscape

Load Citation

Maintenance Fees

Fee Large entity fee small entity fee micro entity fee due date
7.5 Year Payment $3600.00 $1800.00 $900.00 Nov 12, 2027
11.5 Year Payment $7400.00 $3700.00 $1850.00 Nov 12, 2031
Fee Large entity fee small entity fee micro entity fee
Surcharge - 7.5 year - Late payment within 6 months $160.00 $80.00 $40.00
Surcharge - 11.5 year - Late payment within 6 months $160.00 $80.00 $40.00
Surcharge after expiration - Late payment is unavoidable $700.00 $350.00 $175.00
Surcharge after expiration - Late payment is unintentional $1,640.00 $820.00 $410.00