Dean Everett Peterson

US Patent:

6511943, Jan 28, 2003

Filed:

Mar 13, 2002

Appl. No.:

10/096774

Inventors:

Adriana C. Serquis - Los Alamos NM
Yuntian T. Zhu - Los Alamos NM
Frederick M. Mueller - Los Alamos NM
Dean E. Peterson - Los Alamos NM
Xiao Zhou Liao - Los Alamos NM

Assignee:

The Regents of the University of California - Los Alamos NM

International Classification:

H01L 3924

US Classification:

505300, 420402, 420901, 2525214, 423289, 423155, 505100, 505430, 505490, 505500, 505736, 505805

Abstract:

A process of preparing superconducting magnesium diboride powder by heating an admixture of solid magnesium and amorphous boron powder or pellet under an inert atmosphere in a Mg:B ratio of greater than about 0. 6:1 at temperatures and for time sufficient to form said superconducting magnesium diboride. The process can further include exposure to residual oxygen at high synthesis temperatures followed by slow cooling. In the cooling process oxygen atoms dissolved into MgB segregated to form nanometer-sized coherent Mg(B,O) precipitates in the MgB matrix, which can act as flux pinning centers.

US Patent:

7959889, Jun 14, 2011

Filed:

Aug 6, 2008

Appl. No.:

12/221886

Inventors:

Huisheng Peng - Shanghai, CN
Yuntian Theodore Zhu - Cary NC, US
Dean E. Peterson - Los Alamos NM, US
Quanxi Jia - Los Alamos NM, US

Assignee:

Los Alamos National Security, LLC - Los Alamos NM

International Classification:

D01F 9/12

US Classification:

4234472, 428367

Abstract:

A carbon microtube comprising a hollow, substantially tubular structure having a porous wall, wherein the microtube has a diameter of from about 10 μm to about 150 μm, and a density of less than 20 mg/cm. Also described is a carbon microtube, having a diameter of at least 10 μm and comprising a hollow, substantially tubular structure having a porous wall, wherein the porous wall comprises a plurality of voids, said voids substantially parallel to the length of the microtube, and defined by an inner surface, an outer surface, and a shared surface separating two adjacent voids.

US Patent:

8034448, Oct 11, 2011

Filed:

Aug 19, 2008

Appl. No.:

12/229046

Inventors:

Huisheng Peng - Shanghai, CN
Yuntian Theodore Zhu - Cary NC, US
Dean E. Peterson - Los Alamos NM, US
Quanxi Jia - Los Alamos NM, US

Assignee:

Los Alamos National Security, LLC - Los Alamos NM

International Classification:

D02G 3/00

US Classification:

428370, 205 50, 423324, 4234471, 977742, 977847, 977748

Abstract:

Fibrous composite comprising a plurality of carbon nanotubes; and a silica-containing moiety having one of the structures: (SiO)Si—(CH)—NRR) or (SiO)Si—(CH)—NCO; where n is from 1 to 6, and Rand Rare each independently H, CH, or CH.

US Patent:

20040245506, Dec 9, 2004

Filed:

Jun 5, 2003

Appl. No.:

10/456639

Inventors:

Yuntian Zhu - Los Alamos NM, US
Adriana Serquis - Los Alamos NM, US
Leonardo Civale - Los Alamos NM, US
Xiaozhou Liao - Los Alamos NM, US
Duncan Hammon - Los Alamos NM, US
Fred Mueller - Los Alamos NM, US
Dean Peterson - Los Alamos NM, US
Yabei Gu - Pasadena CA, US
Vitali Nesterenko - La Jolla CA, US

International Classification:

H01B001/00

US Classification:

252/500000

Abstract:

A process is disclosed of increasing the critical current density in a superconducting magnesium boride wire by heating a magnesium diboride precursor wire under isostatic pressure in an inert atmosphere at temperatures and for time sufficient to form a superconducting magnesium boride wire characterized as having a higher critical current density than a superconducting magnesium boride wire heated under the same temperature conditions in the absence of isostatic pressing.

US Patent:

20110102795, May 5, 2011

Filed:

Aug 25, 2010

Appl. No.:

12/807040

Inventors:

Huisheng Peng - Shanghai, CN
Dean E. Peterson - Santa Fe NM, US
Yuntian T. Zhu - Cary NC, US
Quanxi Jia - Los Alamos NM, US

International Classification:

G01J 3/46
G02B 5/23
G01N 25/00

US Classification:

356402, 252586, 738658

Abstract:

Chromatic materials such as polydiacetylene change color in response to a wide variety of environmental stimuli including changes in temperature, pH and chemical or mechanical stress, and have been extensively explored as sensing devices. Here is reported the facile synthesis of carbon nanotube/polydiacetylene nanocomposite fibers which rapidly and reversibly respond to electrical current, with the resulting color change being readily observable with the naked eye. These composite fibers also chromatically respond to a broad spectrum of other stimulations: for example, they exhibit rapid and reversible stress-induced chromatism with negligible elongation.Nanotube/polydiacetylene nanocomposite fibers could have various applications in sensing.

US Patent:

51028638, Apr 7, 1992

Filed:

Mar 19, 1991

Appl. No.:

7/671231

Inventors:

Richard B. Cass - Ringoes NJ
Kevin C. Ott - Los Alamos NM
Dean E. Peterson - Los Alamos NM

Assignee:

The United States of America as represented by the United States
Department of Energy - Washington DC

International Classification:

H01B 1200

US Classification:

505 1

Abstract:

A process for fabricating superconducting composite wire by the steps of placing a superconductive precursor admixture capable of undergoing a self propagating combustion in stoichiometric amounts sufficient to form a superconductive product within a metal tube, sealing one end of said tube, igniting said superconductive precursor admixture whereby said superconductive precursor admixture endburns along the length of the admixture, and cross-section reducing said tube at a rate substantially equal to the rate of burning of said superconductive precursor admixture and at a point substantially planar with the burnfront of the superconductive precursor mixture, whereby a clad superconductive product is formed in situ, the product characterized as superconductive without a subsequent sintering stage, is disclosed.

US Patent:

53004868, Apr 5, 1994

Filed:

May 27, 1993

Appl. No.:

8/067911

Inventors:

William L. Hults - Los Alamos NM
Kenneth V. Salazar - Espanola NM
David S. Phillips - Los Alamos NM
Dean E. Peterson - Los Alamos NM

Assignee:

The United States of America as represented by the United States
Department of Energy - Washington DC

International Classification:

C01F 1102
C01F 302
C01F 2900
H01L 3912

US Classification:

505501

Abstract:

A process and a precursor composition for preparing a lead-doped bismuth-strontium-calcium-copper oxide superconductor of the formula Bi. sub. a Pb. sub. b Sr. sub. c Ca. sub. d Cu. sub. e O. sub. f wherein a is from about 1. 7 to about 1. 9, b is from about 0. 3 to about 0. 45, c is from about 1. 6 to about 2. 2, d is from about 1. 6 to about 2. 2, e is from about 2. 97 to about 3. 2 and f is 10. +-. z by reacting a mixture of Bi. sub. 4 Sr. sub. 3 Ca. sub. 3 Cu. sub. 4 O. sub. 16. +-. z, an alkaline earth metal cuprate, e. g. , Sr. sub. 9 Ca. sub. 5 Cu. sub. 24 O. sub. 41, and an alkaline earth metal plumbate, e. g. , Ca. sub. 2-x Sr. sub. x PbO. sub. 4 wherein x is about 0. 5, is disclosed.

US Patent:

61958700, Mar 6, 2001

Filed:

Feb 12, 1999

Appl. No.:

9/249476

Inventors:

Yuntian T. Zhu - Los Alamos NM
Patrick S. Baldonado - El Rito NM
John F. Bingert - Jemez Springs NM
Terry G. Holesinger - Los Alamos NM
Dean E. Peterson - Los Alamos NM

Assignee:

The Regents of the University of California - Los Alamos NM

International Classification:

H01L 3924

US Classification:

29599

Abstract:

Superconductor tapes are annealed under uniaxial pressure, such a compressive annealing yielding significant improvement in the resultant critical current density. This thermomechanical processing technique obtains improved critical currents with fewer processing steps.