Results 51 to 60 of about 6,918 (265)

Hydrogen (H2) Recovery From Hydrogen Sulfide (H2S): Current Technologies, Challenges, and Future Outlook

Advanced Science, EarlyView.
ABSTRACT Hydrogen sulfide (H2S) can be transformed into hydrogen (H2) through several chemical and catalytic processes, offering a promising route for both waste treatment and clean H2 production. This colorless, flammable, and toxic gas is found abundantly in swamps, volcanoes, hot springs, sewages, other natural gas fields, and even in refineries and
Divyesh Cirikonda, Astrid Campos‐Mata, Sehmus Ozden, Shreyasi Chattopadhyay, Pulickel M. Ajayan   +4 more
wiley   +1 more source

Research & Developments of Sintering of Ceramics by Microwave [PDF]

, 2004
New technology is required in the field of industrial kilns reducing for green house effect and increasing productivity. Microwave sintering methods have been expecting to the merits of energy saving, inhibition of grain growth, higher density, less ...
SATO, Motoyasu
core  

Tunable High‐Performance Metamaterial Filters Based on Novel SRR Architectures

Advanced Science, EarlyView.
Based on two novel SRR configurations and two independent SRR integration approaches, four tunable bandpass metamaterial filters were fabricated with an ultra‐thin ceramic substrate. Among them, SM‐2 achieves over 97% electromagnetic wave transmittance, with a minimal 1.15% deviation in its resonant frequency prediction, making them promising ...
Lingxi Qu, Liya Zheng, Ruopeng Liu, Chunlin Ji, Bin Li   +4 more
wiley   +1 more source

Ultralow-loss (1-x)CaWO4-xNa2WO4 (x = 0.1, 0.2) microwave dielectric ceramic for LTCC applications

Journal of Materiomics, 2021
In this work, the (1-x)CaWO4-xNa2WO4 (x = 0.1, 0.2, denoted as 0.9CW-0.1NW and 0.8CW-0.2NW, respectively) ultralow-loss microwave dielectric ceramics were prepared via solid-state reaction method.
Tao Sun, Bin Xiao, Fei Jin, Xinwei Xu, Feng Wang, Naichao Chen, Xianqiang Chen, Hong Wang   +7 more
doaj   +1 more source

Sintering of Ceramics with Microwave Radiation [PDF]

IOP Conference Series: Materials Science and Engineering, 2017
The method of ceramics sintering in the EM-field of UHF band radiation (microwave heating) has been investigated. The paper presents analytical expressions to estimate temperature distribution in the material treated in normalized heating time and pulse duration with Bouguer and Fourier criteria applied. An installation for drying and sintering ceramic
V I Nefedov, P A Luchnikov, N A Trefilov, K A Selenya   +3 more
openaire   +1 more source

A Viewpoint on Hot Spots in Microwave Sintering and Flash Sintering

Advanced Engineering Materials, 2023
Microwave sintering and flash sintering are field‐assisted ceramic processing techniques in which heating is totally or partly obtained inside the material itself by a coupling between the ceramic material and the electromagnetic or electrical field. They frequently give rise to the observation of localized temperature excess known as hot spots that ...
Jean-Marc Chaix, Renaud Bouchet, Didier Bouvard, Timothée Fabre, Tristan Garnault, Christelle Harnois, Kouami Koutoati, Marie Lachal, Sylvain Marinel, Marlu Cesar Steil   +9 more
openaire   +2 more sources

The microwave dielectric properties of transparent ZnAl2O4 ceramics fabricated by spark plasma sintering

, 2017
The transparent ZnAl2O4 ceramics were fabricated by spark plasma sintering. The effects of sintering temperature on the microstructure, optical, microwave dielectric and mechanical properties of ZnAl2O4 ceramics were investigated.
Wang, ZiYing, Ping Fu, ZhiDong Lin, ZiYing Wang, Vellaisamy A. L. Roy, Liu, YuQi, Lin, ZhiDong, Fu, Ping, YuQi Liu, Roy, Vellaisamy A.L.   +9 more
core   +1 more source

Stress‐to‐Light Conversion in an Earth‐Abundant Oxide Semiconductor

Advanced Science, EarlyView.
Stress‐to‐light conversion in solids represents a unique photonic functionality, yet it has never been realized in a chemically simple and sustainable material. Here, we show that sustainable semiconductor ZnO exhibits strong near‐infrared (NIR) luminescence under elastic stress when defect‐engineered to stabilize the p‐type state.
Tomoki Uchiyama, Koki Otonari, Reona Omori, Guangfa Yang, Eiji Nishibori, Ying Chen, Xu‐Guang Zheng, Chao‐Nan Xu   +7 more
wiley   +1 more source

Microwave rapid debinding and sintering of MIM/CIM parts

, 2010
Microwave assisted thermal debinding of parts obtained by Metal Injection Moulding (MIM) or Ceramic Injection Moulding (CIM) could benefit from the heating selectivity, having the organic binder to preferentially absorb microwaves, thus accelerating the ...
LEONELLI, Cristina, C. Leonelli, P. Veronesi, POLI, Giorgio, L. Denti, GATTO, Andrea, G. Poli, VERONESI, Paolo, DENTI, Lucia, A. Gatto   +9 more
core   +1 more source

Asymmetric Electrostrain/Electrobending in Piezoelectric Ceramics: Role of Defect Dipoles or Oxygen Vacancies

Advanced Science, EarlyView.
Defect‐configurational origins of the asymmetric apparent electrostrain are revealed in different piezoelectric ceramics via atomic‐scale visualization of defect configurations. Migration of oxygen vacancies leads to the electrobending effect in N2‐sintered BaTiO3, while defect dipoles in Ba0.99TiO2.99 generate true asymmetric electrostrain without ...
Jie Wang, Geng Huangfu, Hongjie Zhang, Tiannan Yang, Zhenhua Ma, Jingsheng Chen, Yun Liu, Yiping Guo   +7 more
wiley   +1 more source