Zobrazeno 1 - 10
of 25
pro vyhledávání: '"Ruth H.G.A. Kiminami"'
Publikováno v:
Materials Research, Vol 26, Iss suppl 1 (2023)
Microwave-assisted sintering of ceramic materials has proven to be a very favorable processing technique that can promote lower grain growth and densification with shorter dwell times. Hematite is considered a good microwave absorber due to its high
Externí odkaz:
https://doaj.org/article/acbb55b3411b430a93616a2c2130dde6
Autor:
Ana F.F. Farias, Deisy T. de Araújo, Adriano L. da Silva, Elvia Leal, José G.A. Pacheco, Manoel R. Silva, Ruth H.G.A. Kiminami, Ana C.F. de M. Costa
Publikováno v:
Arabian Journal of Chemistry, Vol 13, Iss 6, Pp 5788-5799 (2020)
In search of efficient ways to produce biodiesel under environmentally friendly conditions, catalytic reactions have been explored with emphasis on replacing homogeneous by heterogeneous catalysis with the use of new catalyst types, such as the spine
Externí odkaz:
https://doaj.org/article/aa01663f34f447999c8f2f1d4bb0fb84
Autor:
António B. Mapossa, Joelda Dantas, Manoel R. Silva, Ruth H.G.A. Kiminami, Ana Cristina F.M. Costa, Michael O. Daramola
Publikováno v:
Arabian Journal of Chemistry, Vol 13, Iss 2, Pp 4462-4476 (2020)
In this study, catalytic performance of nanoferrites NiFe2O4 and Ni0.3Zn0.7Fe2O4 is reported. Nickel–ferrite and mixed nickel–zinc ferrite were successfully synthesized by combustion reaction using a conical reactor with production of 10 g per ba
Externí odkaz:
https://doaj.org/article/be89d801be15412bad56ba13d77e67db
Autor:
Ruth H.G.A. Kiminami
Publikováno v:
KONA Powder and Particle Journal, Vol 19, Iss 0, Pp 156-165 (2014)
The combustion process is an important powder preparation process by which several hundred compounds may be prepared. The process is, in the simplest sense, the exploitation of an exothermic and usually very rapid chemical reaction to produce a usefu
Externí odkaz:
https://doaj.org/article/a902d010a8e846099fd4f3c63a9262c8
Autor:
André L.F. Cardoso, Claudia Patricia Fernández Perdomo, Igor C. Cancellieri, Ruth H.G.A. Kiminami, Rodolfo F.K. Gunnewiek
Publikováno v:
Ceramics International. 46:15044-15053
A simple and promising varistor with low additive level was obtained by rapid microwave sintering. In the present work, only 2%-mol of oxides, equimolarly distributed between Bi2O3, Sb2O3 and nanostructured Mn3O4 and CuO was added to nanostructured Z
Publikováno v:
Advanced Powder Technology. 30:1348-1355
Ultra-high temperature ceramic zirconium carbide (ZrC) nanopowders were synthesized for the first time via a microwave-assisted carbothermal reduction reaction using zirconia (ZrO2) and carbon black (C) as the starting materials. The effect of the re
Autor:
Marina Magro Togashi, Ruth H.G.A. Kiminami, Rodolfo F.K. Gunnewiek, Ariane Vilca Suárez, Claudia Patricia Fernández Perdomo
Publikováno v:
The Journal of Engineering and Exact Sciences, Vol 3, Iss 8, Pp 1131-1135 (2017)
The Journal of Engineering and Exact Sciences; Vol. 3 No. 8 (2017); 1131-1135
The Journal of Engineering and Exact Sciences; Vol. 3 Núm. 8 (2017); 1131-1135
The Journal of Engineering and Exact Sciences; v. 3 n. 8 (2017); 1131-1135
The Journal of Engineering and Exact Sciences
Universidade Federal de Viçosa (UFV)
instacron:UFV
The Journal of Engineering and Exact Sciences; Vol. 3 No. 8 (2017); 1131-1135
The Journal of Engineering and Exact Sciences; Vol. 3 Núm. 8 (2017); 1131-1135
The Journal of Engineering and Exact Sciences; v. 3 n. 8 (2017); 1131-1135
The Journal of Engineering and Exact Sciences
Universidade Federal de Viçosa (UFV)
instacron:UFV
Pós de ferrita de bismuto (BiFeO3) foram sintetizados com sucesso mediante o método do precursor polimérico modificado, utilizando como agente quelante, ácido poliacrílico de peso molecular 1800. A morfologia e a estrutura cristalina dos pós ob
Publikováno v:
Ceramics International. 43:10614-10618
This work reports the preliminary synthesis of porous chromium carbide by microwave-assisted carbothermal reduction of simple reactants, Cr 2 O 3 and carbon black, in only 20 min of reaction time. XRD revealed well-crystalized chromium carbides, depe
Publikováno v:
Ceramics International. 43:847-853
ZnO is a versatile semiconductor material and is suitable for application in UV and gas sensors, photocatalysts, dye-sensitized solar cells, and in electronic devices such as LEDs and varistors. In this work, samples of nanostructured ZnO-based varis
Publikováno v:
Journal of Nanomaterials, Vol 2017 (2017)
The excellent physical and chemical properties of boron carbide make it suitable for many applications. However, its synthesis requires a large amount of energy and is time-consuming. Microwave carbothermal reduction is a fast technique for producing