Results 61 to 70 of about 547,292 (342)

Effect of Al2O3 on the physical and chemical properties of ultrahigh-basicity continuous casting mold flux

工程科学学报, 2023
Aluminum oxide is a common component in mold powder and is a kind of amphoteric oxide. It shows the characteristics of acid oxide under high-alkalinity conditions and of alkaline oxide under low-alkalinity conditions.
Gang LI, Wei-jie PAN, Min LI, Li-long ZHU, Sheng-ping HE   +4 more
doaj   +1 more source

High-Q distributed-Bragg-grating laser cavities [PDF]

, 2011
Applying Bragg gratings in Al2O3 channel waveguides, we demonstrate distributed Bragg reflectors with Q-factors of 1.02x10e6. An integrated Al2O3:Yb3+ waveguide laser with 67% slope efficiency and 47 mW output power is achieved with such ...
Bernhardi, E.H., Pollnau, M., Ridder, R.M. de, Wolferen, H.A.G.M. van, Wörhoff, K.   +4 more
core   +2 more sources

Electrical Properties of Atomic Layer Deposited Aluminum Oxide on Gallium Nitride

, 2011
We report on our investigation of the electrical properties of metal/Al2O3/GaN metal-insulator-semiconductor (MIS) capacitors. We determined the conduction band offset and interface charge density of the alumina/GaN interface by analyzing capacitance ...
Bajaj, Sanyam, Esposto, Michele, Hung, Ting-Hsiang, Krishnamoorthy, Sriram, Nath, Digbijoy N., Rajan, Siddharth   +5 more
core   +1 more source

Electrical Conductivities of Conductors, Semiconductors, and Their Mixtures at Elevated Temperatures

Advanced Engineering Materials, EarlyView.
This article presents a comprehensive review of temperature‐dependent electrical conductivity data for multiple material classes at elevated temperatures, highlighting a persistent conductivity gap between metals and semiconductors in the range of 102$\left(10\right)^{2}$– 107$\left(10\right)^{7}$ S/m. Metal–ceramic irregular metamaterials are proposed
Valentina Torres Nieto, Marcia A. Cooper
wiley   +1 more source

Thermo-mechanical behaviours investigation of Nano-Sized Al2O3, TiO2, and Graphene Nanoplatelet Reinforced Epoxy Composites

Düzce Üniversitesi Bilim ve Teknoloji Dergisi
Composite materials find extensive applications in various industries, thanks to their remarkable properties. These sectors include energy, maritime, motor sports, aviation, space and defense.
Mert Kılınçel, Gülden Kabakçı, Guler Bengusu Tezel   +2 more
doaj   +1 more source

The Heat Resistant Capabilities of Bioplastic Composites on Sago Hampas Starch-Al2O3

Jurnal Rekayasa Kimia & Lingkungan, 2023
Sago hampas are a waste with a high starch content. The starch from sago hampas can be used as a raw material for bioplastics. However, because bioplastics have a lower heat resistance than conventional plastics, additives are required to increase heat ...
Afra Najiyah Amatullah, Tetty Kemala, Tun Tedja Irawadi   +2 more
doaj   +1 more source

Four‐Point Bending Tests at High Temperatures on Commercial MgO‐C Refractory Bricks with and Without Recyclate Considering Different Carbon Contents

Advanced Engineering Materials, EarlyView.
Four‐point bending tests are conducted in an argon atmosphere on commercial MgO‐C brick grades with and without MgO‐C recyclate from room temperature up to 1300 °C. No detrimental effect of the MgO‐C recyclates on bending strength is found. Instead, a decisive influence of the total carbon content is observed, with lower total carbon contents ...
Alexander Schramm, Lukas Knöchel, Thomas Schemmel, Christos G. Aneziris, Anja Weidner, Horst Biermann   +5 more
wiley   +1 more source

Characterization of Nanosized Al2O3 Powder Synthesized by Thermal-Assisted MOCVD and Plasma-Assisted MOCVD [PDF]

Iranian Journal of Chemistry & Chemical Engineering, 2011
Nanosized Al2O3 powder is synthesized by thermal Metal Organic Chemical Vapor Deposition (MOCVD)combined withplasma. The effects of reaction temperature, pressure, Al(CH3)3 (TMA) concentration and reactant gases (CO2 and O2) on the characteristics of the
Han Shizhong, Chen Jinghui, Zheng Peng,, Qing Pang   +3 more
doaj  

Effect of Al2O3 on the Ni-Al2O3/SiO2 catalysts for the production of syngas from reforming of CH4 with CO2 and O2(甲烷二氧化碳氧化重整制合成气反应中Al2O3对Ni-Al2O3/SiO2催化剂性能的影响)

Zhejiang Daxue xuebao. Lixue ban, 2008
在流化床中评价了用于甲烷二氧化碳氧化重整制合成气反应的Ni-Al2O3/SiO2催化剂体系（NixAlSi，x代表Al的质量分数，Ni的质量分数为4%）的催化性能.利用XRD，CO2(O2)-TPD，积炭量测定等手段对催化剂进行了表征.结果表明，Al2O3的添加促进了Ni金属的分散；增强了对CO2和O2的吸附能力，使催化剂的抗积炭性能得到很大的提高，延缓了催化剂的失活.
HESu-fang(何素芳), WUHong-miao(吴红苗), MOLiu-ye(莫流业), LOUHui(楼辉), FEIJin-hua(费金华), ZHENGXiao-ming(郑小明)   +5 more
doaj   +1 more source

Green Synthesis and Electrochemical Study of Undoped and Doped Al₂O₃ Nanoparticles Using Hibiscus rosa-sinensis Leaves Extract

Indonesian Journal of Chemistry, 2023
In the present work, nanoparticles of Al2O3, Cu-Al2O3, and Ni-Al2O3 were prepared using Hibiscus rosa-sinensis plant leaf extract through co-precipitation method.
Farzana Haider, Gul Asimullah Khan Nabi, Kiran Shah, Kafeel Ahmad Khan, Haseeba Khan   +4 more
doaj   +1 more source