Results 31 to 40 of about 38,396 (204)

The phase composition and microstructural evolution of a novel MgO-C-Al-Si refractory used in bottom-blowing elements at high temperatures in flowing nitrogen

Journal of Asian Ceramic Societies, 2021
A novel MgO-C-Al-Si refractory with low carbon content used in bottom-blowing elements was prepared, and its phase composition and microstructural evolution were investigated by XRD, SEM and EDS after being treated at 1200–1600°C in flowing nitrogen ...
Mingwei Yan, Jiayu Zhang, Yumin Yang, Kaiqi Liu, Guangchao Sun   +4 more
doaj   +1 more source

Decomposition mechanism of AlMgB14 during the spark plasma sintering

Journal of Materials Research and Technology, 2021
In this work, AlMgB14-based materials were obtained from an (Al–Mg)–B powder mixture by spark plasma sintering. The microstructure, phase composition, and properties of the obtained materials were investigated.
P.Yu. Nikitin, I.A. Zhukov, A.B. Vorozhtsov   +2 more
doaj   +1 more source

Hole‐Activated Lattice Oxygen Enables Pt‐Free Propane Dehydrogenation by Eliminating the Hydrogen Recombination Bottleneck

Angewandte Chemie, EarlyView.
Trace Mg doping into gallia–alumina generates hole‐type oxygen species that accelerate hydrogen recombination, eliminating the need for Pt promotion. The fully oxide‐based catalyst resists sintering under repeated regeneration, outperforming benchmark PtSn and CrOx catalysts with exceptional stability over 30 dehydrogenation–regeneration cycles ...
DongHwan Oh, Jaewoo Jeong, Susung Lee, Younghwan Park, Seunghyuck Chi, Yaejun Baik, Hyungjun Kim, Hyeyoung Shin, Minkee Choi   +8 more
wiley   +2 more sources

Effect of different MgO/Al2O3 ratios on microstructural densification, sintering process and mechanical property of MgAl2O4 materials

Journal of Materials Research and Technology, 2023
The tuning of the properties of MgAl2O4-based materials has aroused great attention in the field of engineering technology. Along these lines, magnesia and alumina were used as raw materials to prepare spinel by the solid-phase sintering method at 1500 ...
Songtong Xuan, Yuming Tian, Xiangchen Kong, Jianying Hao, Xiaojun Wang   +4 more
doaj   +1 more source

Low temperature synthesis of magnesium oxide and spinel powders by a sol-gel process

Materials Research, 2010
Magnesium oxide and magnesium aluminate (MgAl2O4) spinel (MAS) powders have been synthesized by a simple aqueous sol-gel process using citrate polymeric precursors derived from magnesium chloride, aluminium nitrate and citrate.
Li-Zhai Pei, Wan-Yun Yin, Ji-Fen Wang, Jun Chen, Chuan-Gang Fan, Qian-Feng Zhang   +5 more
doaj   +1 more source

Control-monitoring systems of environment temperature and humidity based on oxyspinel thick films [PDF]

Технологія та конструювання в електронній апаратурі, 2010
The possibility to use planar-type multilayer thick-film structures based on manganite CuxNi1–x–yCo2yMn2–yO4 and aluminate MgAl2O4 spinel oxide ceramics as integrated temperature-humidity sensors for environmental control-monitoring systems is analysed.
N. M. Vakiv
doaj   +1 more source

Phase Transformations and Properties Evolution of Alumina-Based Refractory Castables Containing ZnO and SiO2

Materials Research, 2022
Although most of the studies presented in the literature are focused on MgAl2O4 formation and its role on alumina-based refractories performance, ZnO has been reported as a promising spinel inducer. Aiming to investigate the influence of ZnAl2O4 (ZA) and
D. S. Fini, C. L. C. de Mauro, B. P. Bezerra, A. P. Luza   +3 more
doaj   +1 more source

A novel dual-strengthening technology combining external second phase nanoparticle method and hot compression deformation process in micro-alloyed medium carbon steel

Journal of Materials Research and Technology, 2023
Herein, a novel dual-strengthening technology that combines the external second-phase nanoparticle addition method with the hot compression deformation tests was carried out to investigate the effects of surface-modified nanoparticles (NPs) and ...
Hao Guo, Shufeng Yang, Wei Liu, Zhibing Chu, Xiaogang Wang   +4 more
doaj   +1 more source

Produção e caracterização de espumas cerâmicas de nanoaluminato de magnésio (MgAl2O4) sintetizado por reação de combustão utilizando glicerina do biodiesel como combustível [PDF]

, 2015
Tese (doutorado) - Universidade Federal de Santa Catarina, Centro Tecnológico, Programa de Pós-Graduação em Ciência e Engenharia de Materiais, Florianópolis, 2015.Nanoaluminato de magnésio (MgAl2O4) foi sintetizado com sucesso por reação de combustão em ...
Moraes, Graziela Guzi de
core  

Sessile dissociation in the stoichiometric spinel MgAl2O4

Journal de Physique, 1979
Dislocations in spinel, MgO. nAl2O3, are dissociated out of their glide planes and precise determinations of the dissociation planes by stereographic analysis are reported. It is shown that for stoichiometric spinel (n = 1), the numerous, long and straight, edge dislocations left by a small strain on { 110 } glide planes, are dissociated in the { 110 }
Doukhan, N., Duclos, R., Escaig, B.
openaire   +2 more sources