The charge transport of boron carbide, often incorrectly denoted as B(4)C, has been controversially discussed. It is shown that the bipolaron hypothesis is not compatible with numerous experimental results. In particular, the determined real microstructure of boron carbide and its related electronic properties disprove several assumptions, which are fundamental to the bipolaron hypothesis. In contrast, the actual energy band scheme derived mainly from optical investigations is confirmed by careful evaluation of the high-temperature electrical conductivity, and allows a consistent description at most of the experimental results.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1088/0953-8984/19/18/186207 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Corrigendum to "Mechanochemical destruction of perfluorooctane sulfonate (PFOS) using boron carbide (BC)" [ J Hazard Mater 486 (2025) 137044].
J Hazard Mater
January 2025
State Key Joint Laboratory of Environment Simulation and Pollution Control (SKLESP), Beijing, China; Key Laboratory for Emerging Organic Contaminants Control (BKLEOC), Beijing, China; Laboratory for Environmental Frontier Technologies (BLEFT), School of Environment, Tsinghua University, Beijing 100084, China. Electronic address:
Electrically Pumped -BN Single-Photon Emission in van der Waals Heterostructure.
ACS Nano
January 2025
Department of Physics and Astronomy, Seoul National University, Seoul 08826, Korea.
Atomic defects in solids offer a versatile basis to study and realize quantum phenomena and information science in various integrated systems. All-electrical pumping of single defects to create quantum light emission has been realized in several platforms including color centers in diamond and silicon carbide, which could lead to the circuit network of electrically triggered single-photon sources. However, a wide conduction channel which reduces the carrier injection per defect site has been a major obstacle.
View Article and Find Full Text PDFDesign and Optimization of W-Mo-V High-Speed Steel Roll Material and Its Heat-Treatment-Process Parameters Based on Numerical Simulation.
Materials (Basel)
December 2024
School of Material Science and Engineering, Huazhong University of Science & Technology, Wuhan 430074, China.
W-Mo-V high-speed steel (HSS) is a high-alloy high-carbon steel with a high content of carbon, tungsten, chromium, molybdenum, and vanadium components. This type of high-speed steel has excellent red hardness, wear resistance, and corrosion resistance. In this study, the alloying element ratios were adjusted based on commercial HSS powders.
View Article and Find Full Text PDFImproving the Fracture Toughness of Boron Carbide via Minor Additions of SiC and TiB Through Hot-Press Sintering.
Materials (Basel)
December 2024
Analysis & Standards Center, Korea Institute of Ceramic Engineering & Technology (KICET), 101 Soho-ro, Jinju-si 52851, Republic of Korea.
Boron carbide (BC) is an essential material in various high-performance applications due to its light weight and hardness. In this work, BC-based composites were fabricated via a powder route consisting of powder mixing, precursor preparation, and hot-pressing under vacuum. The composites' mechanical properties and microstructure were analyzed to investigate the effect of adding minor second-phase particles.
View Article and Find Full Text PDFMechanochemical destruction of perfluorooctane sulfonate (PFOS) using boron carbide (BC).
J Hazard Mater
December 2024
State Key Joint Laboratory of Environment Simulation and Pollution Control (SKLESP), Beijing, China; Key Laboratory for Emerging Organic Contaminants Control (BKLEOC), Beijing, China; Laboratory for Environmental Frontier Technologies (BLEFT), School of Environment, Tsinghua University, Beijing 100084, China. Electronic address:
Widespread detection in soils and sediments underscores the potential threats posed by persistent, bioaccumulative and toxic perfluorooctane sulfonate (PFOS) to ecosystems and organisms. Nevertheless, the formidable energy of the C-F bond imparts stability and hampers degradation. This study investigates the potential of boron carbide (BC), a hard-ceramic material often utilized in armor and abrasion contexts, for degrading solid-phase PFOS through ball milling.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!