Results 21 to 30 of about 1,652 (235)

PYROLISYS OF CALCIUM ADIPATE IN THE PRESENCE OF CATALYSTS BASED ON CHROMIUM ALUMINATES

, 2022
The possibility of obtaining cyclopentanone by pyrolysis of calcium adipate in the presence of catalysts based on chromium aluminates is considered. Pyrolysis proceeded with the formation of cyclopentanone, cyclopentenone and cyclopentene.
Golovanov A.A., Orlova D.D., Tsvetkova I.V., Kondrateva A.A.   +3 more
core   +1 more source

Characterization of Multiphase Mixtures of Calcium Aluminates and Magnesium Aluminate Spinel Using Time‐Gated Raman Spectroscopy [PDF]

, 2020
In aluminum‐killed calcium‐treated steels, the characterization of multiphase oxides found in the CaO–MgO–Al2O3 system is essential for the study of inclusion formation, modification, and the control process.
Francis Gyakwaa, Tuomas Alatarvas, Shu, Qifeng, Marko Huttula, Huttula, Marko, Gyakwaa, Francis, Aula, Matti, Fabritius, Timo, Timo Fabritius, Tero Vuolio, Matti Aula, Qifeng Shu, Vuolio, Tero, Alatarvas, Tuomas   +13 more
core   +2 more sources

Mixed Electrical Conduction of Calcium Aluminates Synthesized by Polymeric Precursors [PDF]

Materials Research
A study of the electrical transport properties of calcium aluminate (CA) with coexisting C3A and C12A7 phases was carried out. In this work, powders resulting from synthesis based on the polymer precursor method.
Faili Cintia Tomsen Veiga, Ricardo Fernández González, José Jurado Egea, Sergio da Silva Cava, Vânia Caldas de Sousa   +4 more
doaj   +2 more sources

Dissolution mechanism of Al2O3 in refining slags containing Ce2O3 [PDF]

Journal of Mining and Metallurgy. Section B: Metallurgy, 2016
In the present work, the rate of dissolution of Al2O3 rod in CaO-SiO2-Al2O3 and CaO-SiO2-Al2O3-Ce2O3 slags were carried out in the temperature range of 1793 K (1520ºC) - 1853 K (1580ºC) under static conditions.
Wang L.J., Wang Q., Li J.M., Chou K.C.
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

Electrical transport properties of calcium and barium aluminates [PDF]

, 1987
Electrical conductivity and ionic transport numbers have been measured of barium and calcium aluminates with composition CaO·nAl2O3 (n=7/12, 1, 2, 6) and 0.82 BaO·6Al2O3. At room temperatures these compounds are insulators, but at high temperatures mixed
Metselaar, R Ruud, Hoefsloot, AM, Hoefsloot, A.M., Metselaar, R.   +3 more
core   +1 more source

A Carbide Slag-Based, Ca₁₂Al₁₄O₃₃-Stabilized Sorbent Prepared by the Hydrothermal Template Method Enabling Efficient CO₂ Capture

Energies, 2019
Calcium looping is a promising technology to capture CO2 from the process of coal-fired power generation and gasification of coal/biomass for hydrogen production.
Xiaotong Ma, Yingjie Li, Yi Qian, Zeyan Wang   +3 more
doaj   +1 more source

Preliminary studies on hydrated cement for its reuse in geopolymers

Dyna, 2016
The carbonation of hydrated ordinary Portland cement (OPC) allows the transformation of hydrated calcium aluminates and silicates into calcium carbonate and amorphous silica/ alumina.
Yasna Segura Sierpes, María Victoria Borrachero Rosado, José María Monzó Balbuena, Jordi Payá Bernabeu   +3 more
doaj   +1 more source

Supercritical carbonation of calcium aluminate cement

Cement and Concrete Research, 2008
The microstructural changes occurring during supercritical carbonation (scCO2) of calcium aluminate cement (CAC) and changes to its strength have been investigated. Cylindrical specimens of CAC cured at different temperatures were prepared and then subjected to scCO2.
Fernández Carrasco, Lucía, Miravitlles, C, Rius, J.   +2 more
openaire   +3 more sources

Synthesis of calcium aluminates through the polymeric precursor route [PDF]

Chemical Industry and Chemical Engineering Quarterly, 2006
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A. Gaki, R. Chrysafi, Th. Perraki, G. Kakali
doaj