SEARCH · Engineering Papers

Results for “Bi-Sb”

Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.

SourceResearch connectionFrom yearThrough year

Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.

4 records

All sources NASA NTRS DOE OSTI

DOE OSTI2020

Electrochemical Separation of Alkaline-Earth Elements from Molten Salts Using Liquid Metal Electrodes

Closing the nuclear fuel cycle requires recycling used nuclear fuel. Additional waste is generated during recycling due to fission products accumulating in processing salts (LiCl-KCl). Reducing waste generated during recycling entails recovering alkaline-earth fission products (Ba 2+ /Sr 2+ ) from molten chlorides with a minimal loss of bulk electrolyte constituents (Li + /K + ). Electrochemical co-deposition of Ba 2+ /Li + and Sr 2+ /Li + into liquid metal (Bi, Sb, Sn, Pb) and alloy (Bi-Sb) electrodes was investigated in LiCl-KCl-(BaCl 2 , SrCl 2 ) electrolytes at 500 °C and 650 °C. For the pure Bi (500 °C) and Sb (650 °C) electrodes, the greatest percentage of charge was used to deposit Ba and Sr. Effective recovery of Ba/Sr by liquid Bi and Sb electrodes is supported via experimentally determined activity values of Ba/Sr in Bi and Sb. Alloying Sb with Bi increased Ba recovery but decreased Sr recovery, as compared to recovery using the liquid Bi electrode. Here, the results suggest that alkaline-earth fission products can be recovered from molten chlorides by liquid metal electrodes via electrochemical separation, thereby providing a methodology to reduce the generation of nuclear waste from nuclear fuel recycling.

11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS↗

NASA NTRS1982

Self-heated thermocouples for far-infrared detection

A novel self-heated Bi-Sb thermocouple for far-infrared detection has been developed. The detector is suitable for integration with monolithic antennas and imaging arrays. The device is fabricated in a single photolithography masking step using a photoresist-bridge technique. This bridge technique has also been used to make microbolometers with lower 1/f noise than those made by two conventional masking steps. The thermocouples have a noise equivalent power of 7 x 10 to the -10th W/sq rt of Hz and a 3-dB frequency response of 150 kHz.

Neikirk, D. P.↗

DOE OSTI2020

Materials Data on BiSb by Materials Project

BiSb is Halite, Rock Salt structured and crystallizes in the trigonal R3m space group. The structure is three-dimensional. Bi3+ is bonded to six equivalent Sb3- atoms to form a mixture of distorted corner and edge-sharing BiSb6 octahedra. The corner-sharing octahedral tilt angles are 12°. There are three shorter (3.03 Å) and three longer (3.53 Å) Bi–Sb bond lengths. Sb3- is bonded to six equivalent Bi3+ atoms to form a mixture of distorted corner and edge-sharing SbBi6 octahedra. The corner-sharing octahedral tilt angles are 12°.

36 MATERIALS SCIENCE↗

DOE OSTI2020

Materials Data on Bi3Sb by Materials Project

BiBi2Sb is Molybdenite-like structured and crystallizes in the trigonal R3m space group. The structure is two-dimensional and consists of three bismuth molecules and three Bi2Sb sheets oriented in the (0, 0, 1) direction. In each Bi2Sb sheet, there are two inequivalent Bi1+ sites. In the first Bi1+ site, Bi1+ is bonded in a distorted T-shaped geometry to three equivalent Sb3- atoms. All Bi–Sb bond lengths are 3.04 Å. In the second Bi1+ site, Bi1+ is bonded in a 3-coordinate geometry to three equivalent Sb3- atoms. All Bi–Sb bond lengths are 3.52 Å. Sb3- is bonded to six Bi1+ atoms to form distorted edge-sharing SbBi6 octahedra.

36 MATERIALS SCIENCE↗