Results 31 to 40 of about 33,137,902 (193)

Comparação de procedimentos de quantificação de caulinita e gibbsita na fração argila desferrificada de Latossolos Comparison of procedures for quantification of kaolinite and gibbsite in iron-free clay in Latosols

Revista Brasileira de Ciência do Solo, 2008
A acurada determinação dos teores dos minerais que constituem a fração argila dos Latossolos pode contribuir para o aprimoramento de seu uso e manejo.
Marcelo Eduardo Alves, Yvonne Primerano Mascarenhas, Carlos Manoel Pedro Vaz   +2 more
doaj   +1 more source

An insight into the thermal properties of struvite-k by Rietveld refinement method

Journal of Materials Research and Technology, 2023
This work investigated the thermal properties of struvite-k (a main binding phase and a strength-giving mineral from the magnesium potassium phosphate cements) exposed to different conditions by Rietveld Refinement Method coupled with X-ray diffraction ...
Yang Yuanquan, Zhang Guanhua, Guo Jinbo, Qi Dingwen, Liu Runqing   +4 more
doaj   +1 more source

Structural characterization of plasma nitrided interstitial-free steel at different temperatures by SEM, XRD and Rietveld method

, 2017
Plasma nitriding processes are widely used to improve surface properties of several steels and alloys. In this work, the formation of nitrides in the surface of plasma nitrided IF steels as a function of the temperature was investigated.
na Paula de Andrade Manfridini, Geralda Cristina Durães de Godoy, E. Santos   +2 more
semanticscholar   +1 more source

Quantitative Analysis of Mineral Composition of Kyanite by X-ray Diffraction with Rietveld Refinement Method

Yankuang ceshi, 2019
BACKGROUND The content of minerals in kyanite can be analyzed by chemical phase method, but the analytical process is very tedious. Moreover, the existence of heteromorphism and refractory minerals can affect the accuracy of analysis results. An internal
RAN Jing, GUO Chuang-feng, DU Gu, WANG Feng-yu   +3 more
doaj   +1 more source

Effect of the pH pre-adjustment on the formation of In2W3O12 and In6WO12 powders: Cluster coordination and optical band gap

Boletín de la Sociedad Española de Cerámica y Vidrio, 2020
In this communication, diindium tristungstate (In2W3O12) and hexaindium tungstate (In6WO12) powders were synthesized by the co-precipitation method at different pH values and heat treatment at 1073 K for 2 h.
Rafael Texeira de Paiva, Içamira Costa Nogueira, Júlio César Sczancoski, Pablo Santana Lemos, José Milton Elias Matos, Reginaldo Silva Santos, Elson Longo, Laécio Santos Cavalcante   +7 more
doaj   +1 more source

Evidence of ytterbium doping in YbxZn1-xO nanoparticles synthesized by polymer precursor method

Cerâmica, 2021
In this work, we report the synthesis of YbxZn1-xO nanoparticles (0.000 ≤x≤ 0.100) by polymer precursor method and the study of their vibrational and structural properties. Thermal analysis of the polymeric precursor showed that the thermal decomposition
M. S. L. Trindade, T. S. Silva, W. L. R. Pires, T. J. Castro   +3 more
doaj   +1 more source

Assessment of firing conditions in old fired-clay bricks: The contribution of X-ray powder diffraction with the Rietveld method and small angle neutron scattering

, 2016
Full characterization of fired-clay bricks is crucial for the improvement of process variables in manufacturing and, in case of old bricks, for restoration/replacement purposes.
A. Viani, K. Sotiriadis, A. Len, Petr Šašek, R. Ševčík   +4 more
semanticscholar   +1 more source

Assessing the neutron shielding potential of coconut shell and zircon sand: showcasing the potential effectiveness of zircon sand

Kuwait Journal of Science
The effectiveness of concrete radiation shielding is significantly influenced by the macroscopic cross-section values of its constituent materials. This parameter plays a crucial role in determining a material's ability to absorb neutrons, where higher ...
Sulistioso Giat Sukarya, Abdul Djamil Husin, Agus Salim Afrozi, Jan Setiawan, Auring Rachminisari, Agus Sunardi, Indra Gunawan, Ariyawan Sunardi, Putri Mulyani   +8 more
doaj   +1 more source

Síntese e caracterização de CaZrO3 e BaZrO3 nanoestruturados

Química Nova, 2013
In this work, nanostructured samples of barium zirconate (BaZrO3) and calcium zirconate (CaZrO3) were synthesized by the gel-combustion method, using glycine as fuel.
Amanda Laura Ibiapino, Laysa Pires de Figueiredo, Gustavo E. Lascalea, Rogério Junqueira Prado   +3 more
doaj   +1 more source

Care, Social Practices and Normativity. Inner Struggle versus Panglossian Rule-Following

Phenomenology and Mind, 2020
Contrary to the popular assumption that linguistically mediated social practices constitute the normativity of action (Kiverstein and Rietveld, 2015; Rietveld, 2008a,b; Rietveld and Kiverstein, 2014), I argue that it is affective care for oneself and ...
Alexander Albert Jeuk
doaj   +1 more source