Results 51 to 60 of about 2,664 (204)

Synthesis of Cubic Boron Nitride

Journal of the Ceramic Association, Japan, 1970
Cu5Sn, Cu5Sn8,Mg9Sn91合金あるいは Mg 金属の1部と, 六方晶 BN の4部の混合物を白金チューブに充填し, 改良ガードル型高圧装置を用いて, 最大約 80kbar, 2200℃, 30分間の条件下で処理した。不純物を酸で分離後, 合成立方晶 BN をデバイ・シェラーX線回折図形, 硬度試験などで同定した。例えば Cu5Sn 合金の場合, zinc-blende 構造をもつ立方晶 BN を約 1000℃, 40kbarの条件下で合成した。結晶の大きさは数0～ 数100μ であり,色相は灰色,暗黒色,白色などであった。六方晶〓立方晶 BN 平衡線は Wentorf の実験的平衡1線の延長上に存在した。Mg9Sn91合金と Mg 金属の場合, おのおの約 1000℃, 32kbar,
SAITO, Hajime, USHIO, Masumi, NAGAO, Shuichi   +2 more
openaire   +2 more sources

Janus Nanostructures Enabled by Confined Interfacial Engineering for Enhanced Electromagnetic Response

Advanced Science, EarlyView.
Confined diffusion‐driven interfacial engineering enables the nanoscale construction of asymmetric SiC@C Janus hollow nanoshells, achieving synergistic impedance matching and electromagnetic energy dissipation for highly efficient broadband microwave absorption at ultralow filler loading.
Limeng Song, Cheng Song, Feiyue Hu, Yongqiang Chen, Linan Wang, Huagao Wang, Li Guan, Duo Chen, Kesong Yu, Yabo Huang, Shihao Jia, Xin Xu, Qiancheng Gao, Dou Zhang, Hailong Wang, Haijiao Xie, Rui Zhang, Bingbing Fan   +17 more
wiley   +1 more source

From Materials to Systems: Challenges and Solutions for Fast‐Charge/Discharge Na‐Ion Batteries

Advanced Energy Materials, EarlyView.
This review systematically analyzes the key characteristics limiting the fast‐charge/discharge capability of Na‐ion batteries (SIBs) from a multi‐scale perspective encompassing electrode materials, the electrode‐electrolyte interface, and the system. Furthermore, it presents practical solution strategies for the fundamental issues arising at each scale,
Bonyoung Ku, Sangbin Park, Sunha Hwang, Sunghyun Lim, Won‐Sub Yoon, Jongsoon Kim   +5 more
wiley   +1 more source

The Analysis of the Transformation Mechanism of cBN Crystals with the First-Principle Calculation

Journal of Chemistry, 2020
To clarify the synthesis mechanism of cubic boron nitride (cBN) with catalysts at high temperature and high pressure, we calculate the surface energy of the main phases in the Li-N-B synthesis system using the first-principle method. Based on the density
Lichao Cai, Bin Xu, Meizhe Lv, Xiaohong Fan   +3 more
doaj   +1 more source

Deciphering Intricacies in Directional CO2 Conversion From Electrolysis to CO2 Batteries

Advanced Energy Materials, EarlyView.
This review will delve into the inherent connections and distinctions of CO2‐directed conversion in ECO2RR and CO2 batteries, in terms of product types, catalyst selection, catalytic mechanisms, and electrochemical performances, while proposing a benchmarking framework for the evaluation of CO2 batteries and innovative CO2 battery configurations for ...
Changfan Xu, Huaping Zhao, Lizhuang Chen, Weidong Shi, Guosheng Shao, Yong Lei   +5 more
wiley   +1 more source

Tribological behaviour of alumina-based nanocomposites reinforced with uncoated and Ni-coated cubic boron nitride

Journal of Materials Research and Technology, 2019
Currently, there is a rising demand to develop composite materials with outstanding tribological properties along with excellent thermal-mechanical properties for harsh tribological applications.
Muhammad Umar Azam, Bilal Anjum Ahmed, Abbas Saeed Hakeem, Hafiz Muzammil Irshad, Tahar Laoui, Muhammad Ali Ehsan, Faheemuddin Patel, Fazal Ahmad Khalid   +7 more
doaj   +1 more source

Discovery of Novel Materials with Giant Dielectric Constants via First‐Principles Phonon Calculations and Machine Learning

Advanced Intelligent Discovery, EarlyView.
We discovered novel materials with giant dielectric constants by combining first‐principles phonon calculations and machine learning. Screening 525 perovskites identified six candidates. RbNbO3 was synthesized under pressure and showed ε ≈ 800–1000. This validates our framework as a powerful tool for high‐performance dielectric materials discovery.
Hiroki Moriwake, Kazuki Shitara, Rie Yokoi, Takeharu Kato, Isao Tanaka, Ayako Yamamoto, Kimitoshi Murase, Yosuke Hamasaiki, Yoshitaka Ehara, Mitsuru Itoh   +9 more
wiley   +1 more source

Effect of nano-diamond on mechanical properties of polycrystalline cubic boron nitride

Fenmo yejin jishu
Polycrystalline cubic boron nitride (PcBN) was sintered at the high temperature of 1500 ℃ under the pressure of 5.5 GPa, using cubic boron nitride (cBN) powders as the raw materials, Al powders and Si powders as the binders, and nano-diamond as the ...
ZHANG Qunfei, XIAO Changjiang, MA Jinming, TANG Lihui, LI Zhengxin   +4 more
doaj   +1 more source

Sintering of low-melting glass powders and glass-abrasive composites [PDF]

Science of Sintering, 2003
Sintering of glass powders in Na2O-B2O3-SiO2 and PbO-ZnO-B2O3-SiO2 systems as well as of their mixtures has been studied. The process of sintering is shown to change because of crystallization of the glass of the PbO-ZnO-B2O3-SiO2 system.
Shilo A.E., Bondarev E.K., Kukharenko S.A.   +2 more
doaj   +1 more source

From Data to Discovery: Machine Learning–Enabled Intelligent Characterization of Two‐Dimensional Materials

Advanced Intelligent Discovery, EarlyView.
Machine learning serves as a central engine for the intelligent characterization of two‐dimensional materials by integrating multimodal techniques, including optical microscopy, spectroscopy, electron microscopy, and scanning probe microscopy (SPM). This unified framework enables automated, high‐throughput, and quantitative extraction of structural ...
Zhi‐Long Cao, Jia‐Xu Yan
wiley   +1 more source