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Virtual-Impact Particle Sizing for Precursor Powders of Nb3Sn and Bi-2212…

Award Information

Department of Energy
Award ID:
Program Year/Program:
2001 / STTR
Agency Tracking Number:
Solicitation Year:
Solicitation Topic Code:
Solicitation Number:
Small Business Information
Accelerator Technology Corporation
9701 Valley View Dr. College Station, TX 77845-7158
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Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No
Phase 1
Fiscal Year: 2001
Title: Virtual-Impact Particle Sizing for Precursor Powders of Nb3Sn and Bi-2212 Superconductors
Agency: DOE
Contract: DE-FG03-01ER86123
Award Amount: $100,000.00


Particle size distribution is one of the critical parameters in fabricating high-performance, fine-filament superconductors of Nb3Sn and Bi-2212 using the powder-in-tube (PIT) technique. Even a few large particles in the tubes of a multi-filament PIT billet will limit the size of the drawing or rolling to finish dimension. Since performance scales with the number of filaments in a strand, improving the drawing limits should improve the ultimate performance of the superconducting strand. Virtual-impact processing (VIP), a technique originally developed to separate micron-size particles from air for environmental health studies, can be used to sort powders by particle size. By comparison to other techniques, VIP enables the removal of all particles with size greater than a desired threshold. This project will use a small-scale VIP to produce precursor powders of NbSn2, bronze, and sintered Bi-2212. The target particle size will be 2 mm; all particles of size > 4 mm will be removed. The various process parameters (geometry, air velocity, entrained powder density) as they will optimized and a design for scaling up the process to deliver ~kg/min quantities will be prepared.

Principal Investigator:

Business Contact:

Small Business Information at Submission:

Accelerator Technology Corporation
207 Dellwood Bryan, TX 77801

Number of Employees: N/A
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No
Research Institution Information:
Texas Engineering Experiment Station
332 WERC Mail Stop 3000-TAMU
College Station, TX 77843
RI Type: Nonprofit college or university