Results 61 to 70 of about 54,335 (262)

European mineral statistics 2002-06 : a product of the World Mineral Statistics database [PDF]

, 2008
European Mineral Statistics has over 300 pages of tables on minerals production and trade. Thirty two countries are covered including all the EU members, EU applicants, Norway and Switzerland. In the first section there are tables by country, followed by
Bide, Tom, Brown, Teresa, Hannis, Sarah, Hetherington, Linda, Hobbs, Susan, Idoine, Naomi, Naden, Jonathan   +6 more
core  

New knowledge about shock events that affected the L‐chondrite parent body from two heavily shocked L6 meteorite finds

Meteoritics &Planetary Science, EarlyView.
Abstract We report new results from a study of shock‐related features in the L6 ordinary chondrites Northwest Africa (NWA) 4672 and NWA 12841. Our observations confirm the occurrence of eight high‐pressure (HP) minerals in each meteorite, namely, ringwoodite, majorite, akimotoite, wadsleyite, albitic jadeite, lingunite, tuite, and xieite.
I. Baziotis, L. Ferrière, C. Ma, J. Hu, D. Palles, P. D. Asimow   +5 more
wiley   +1 more source

High-temperature ceramic-to-ceramic seals [PDF]

, 1972
Noble-metal braze applied to appropriately prepared zirconia parts produces a gas-tight, durable seal that can withstand temperature of 825 C for over 2000 hours without ...
Smart, W.
core   +1 more source

Substitution of Fe3+ into anorthite in oxidized, Al‐deficient ferrobasaltic systems with implications for the petrogenesis of angrite meteorites

Meteoritics &Planetary Science, EarlyView.
Abstract Angrite meteorites are critically silica‐undersaturated igneous rocks with high Ca/Al and Fe/Mg, along with depletion in volatile lithophile elements Na and K such that they crystallize anorthite along with olivine and calcic pyroxene. The anorthite in angrites contains substantial Fe, and in NWA 1670 and NWA 1296, it is present at major ...
Seann J. McKibbin, Dominique Tanner, Hugh St. C. O'Neill   +2 more
wiley   +1 more source

Low-Rank Coal Supported Ni Catalysts for CO₂ Methanation

Energies, 2021
As renewable energy source integration increases, P2G technology that can store surplus renewable power as methane is expected to expand. The development of a CO2 methanation catalyst, one of the core processes of the P2G concept, is being actively ...
Soohyun Kim, Yunxia Yang, Renata Lippi, Hokyung Choi, Sangdo Kim, Donghyuk Chun, Hyuk Im, Sihyun Lee, Jiho Yoo   +8 more
doaj   +1 more source

Influence of Heat Treatment Mode of Various Magnesia Rocks on their Properties [PDF]

, 2005
Investigations of the changes of structure, specific surface and true density of following high-magnesia rocks at heat treatment have been performed: brucite rocks, magnesite, hydromagnesia rocks, amorphous magnesite.
A.V. Sukhushina, Galimov, N.A. Mitina, V.A. Lotov, Zyryanova   +4 more
core   +1 more source

Mechanistic Study of the Effects of Magnesia Reactivity on Setting and Hardening of Basic Magnesium Sulfate Cement

Journal of advanced concrete technology, 2020
Basic magnesium sulfate (BMS) cement was prepared by magnesia with different reactivities derived from calcination of basic magnesium carbonate at 600 to 1000°C.
M. Miao, Chengyou Wu, Yongshan Tan, Hong-fa Yu   +3 more
semanticscholar   +1 more source

Magnesia Research on Treatments for the De-Acidification of Info-Documentary Collections from Libraries, Archives and Museums: Case Studies

Revista Română de Biblioteconomie și Știința Informării, 2017
The scientific concern of the authors is part of the project entitled: “The research, testing and using in the laboratory of natural products presenting significant impacts for de-acidification of paper collections“, an ambitious, original scientific ...
Vasile Deac, Ionela Burz, Alexandru Deac
doaj   +1 more source

Effect of titanium oxide addition on magnesia refractories

Journal of the Australian Ceramic Society, 2020
This work contains the results of investigations into the influence of titanium oxide (TiO2) addition on the properties of refractory magnesia ceramics. The presented research involved adding titanium oxide in a classic way, i.e.
R. Kusiorowski
semanticscholar   +1 more source

Quelantes como aditivos anti-hidratação da magnésia Chelants as magnesia anti-hydration additives

Cerâmica, 2009
A magnésia confere aos concretos excelentes propriedades refratárias aliadas a uma elevada resistência a escórias básicas. Entretanto, na presença de água, ela se hidrata em uma reação expansiva formando o hidróxido de magnésio. A expansão gerada, se não
L. F. Amaral, I. R. de Oliveira, R. Salomão, V. C. Pandolfelli   +3 more
doaj   +1 more source