Method of fabricating tungsten scandate nano-composite powder for cathodes
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jul 14, 2020
Grant Date -
Dec 14, 2017
app pub date -
Aug 1, 2017
filing date -
Feb 10, 2015
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
Methods for fabricating refractory metal scandate nanocomposite powders with homogeneous microstructured refractory metal grains and a uniform nanosized dispersion of scandia are provided. The powders prepared by the sol-gel methods have a spherical morphology, a narrow distribution of particle sizes and a very uniform dispersion of nanosized scandia particles joined to the tungsten grains. The powder particle sizes can range from nanometers to micrometers. The powders can be pressed into porous cathode structures that can be impregnated with emissive materials to produce high current density and long life cathodes for high-power terahertz vacuum electron devices. The sol-gel fabrication methods allow control over the materials, particle size, particle composition and pore size and distribution of the cathode structure by manipulation of the process parameters.
First Claim
Other Claims data not available
Family
International Classification(s)
- 2017 Application Filing Year
- H01J Class
- 2316 Applications Filed
- 1735 Patents Issued To-Date
- 74.92 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 4 Citation Count
- H01J Class
- 50.32 % this patent is cited more than
- 5 Age
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 7.5 Year Payment | $3600.00 | $1800.00 | $900.00 | Jan 14, 2028 |
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Jan 14, 2032 |
