Justin J Schwartz

US Patent:

58589260, Jan 12, 1999

Filed:

Aug 23, 1996

Appl. No.:

8/702733

Inventors:

Justin Schwartz - Tallahassee FL
Christian H. Wolters - Tallahassee FL
Kathleen M. Amm - Tallahassee FL

Assignee:

Florida State University - Tallahassee FL

International Classification:

H01L 3924

US Classification:

505120

Abstract:

The present invention is directed to a process for preparing a HgBaCaCuO superconductor by annealing a precursor mixture comprising a lower member of the homologous HgBaCaCuO superconductor series, a source of calcium and a source of copper. The precursor mixture may further comprise a source of oxygen, a source of rhenium, and, if desired, a source of an additional element selected from the group consisting of halogens and metals other than mercury, barium, calcium, copper and rhenium. The process is particularly effective for preparing (Hg. sub. 1-x,Re. sub. x)Ba. sub. 2 Ca. sub. 2 Cu. sub. 3 O. sub. 8-y by annealing a precursor mixture containing (Hg. sub. 1-x,Re. sub. x)Ba. sub. 2 Ca. sub. 1 Cu. sub. 2 O. sub. 6-y at a temperature below about 850. degree. C. , wherein x ranges up to about 0.

US Patent:

20190009902, Jan 10, 2019

Filed:

Jun 15, 2017

Appl. No.:

15/624237

Inventors:

- Raleigh NC, US
Yawei Wang - Raleigh NC, US
Honghai Song - Okemos MI, US
Justin Schwartz - Raleigh NC, US

International Classification:

B64C 30/00
H01F 6/02
H01F 6/06
H01L 39/02

Abstract:

A hypersonic aircraft having a homopolar motor with high temperature superconducting (HTS) non-insulated (NI) coil magnets is described. In some implementations, the HTS NI coil magnets can have a graded resistance design. In some implementations, the HTS NI coil magnets can include a series of stacked coils, each of the series of coils comprising multiple turns having turn-to-turn resistance, where the turn-to-turn resistance of the series of coils is graded coil-to-coil across the magnet. In some implementations, the HTS NI coil magnets can include an NI coil comprising multiple turns and two or more thermal barriers each disposed between two adjacent turns of the coil, where an electrically conductive portion of one of the thermal barriers does not overlap with an electrically conductive portion of a different adjacent one of the thermal barriers. Some implementations can include a disk-type homopolar motor/generator including one or more HTS NI coil magnets.

US Patent:

20190009903, Jan 10, 2019

Filed:

Jun 15, 2017

Appl. No.:

15/624259

Inventors:

- Raleigh NC, US
Justin Schwartz - Raleigh NC, US

International Classification:

B64C 30/00
H01F 6/02
H01F 6/06
H01F 41/04
B64D 27/24

Abstract:

A hypersonic aircraft having a homopolar motor with high temperature superconducting (HTS) non-insulated (NI) coil magnets is described. In some implementations, the HTS NI coil magnets can have a graded resistance design. In some implementations, the HTS NI coil magnets can include a series of stacked coils, each of the series of coils comprising multiple turns having turn-to-turn resistance, where the turn-to-turn resistance of the series of coils is graded coil-to-coil across the magnet. In some implementations, the HTS NI coil magnets can include an NI coil comprising multiple turns and two or more thermal barriers each disposed between two adjacent turns of the coil, where an electrically conductive portion of one of the thermal barriers does not overlap with an electrically conductive portion of a different adjacent one of the thermal barriers. Some implementations can include a disk-type homopolar motor/generator including one or more HTS NI coil magnets.

US Patent:

20150064492, Mar 5, 2015

Filed:

Aug 28, 2014

Appl. No.:

14/471295

Inventors:

- Raleigh NC, US
Justin Schwartz - Cary NC, US

International Classification:

B05D 3/12
B32B 38/06
B32B 37/24
B32B 38/00
B05D 1/00
B05D 3/02

US Classification:

428600, 427277, 427130, 427 58, 156182, 428172, 428173

Abstract:

The present disclosure provides materials exhibiting improved properties arising from a surface treatment thereof. In particular, thin films can be provided with a patterned surface, the patterned thin films exhibiting improved properties such as in relation to coercivity, mechanical coupling, and magnetic coupling. The disclosure further provides layered composites comprising one or more patterned thin films. The disclosure also provides methods of forming patterned thin films.