NiWO4 powders prepared via polymeric precursor method for application as ceramic luminescent pigments

Autor: Naiara A. Lima, Lorena D. S. Alencar, Máximo Siu-Li, Carlos A. C. Feitosa, Alexandre Mesquita, Jean-Claude M’peko, Maria I. B. Bernardi

Publikováno v: Journal of Advanced Ceramics, Vol 9, Iss 1, Pp 55-63 (2020)

Abstract NiWO4 was prepared using the polymeric precursor method and studied in terms of physical and chemical properties to verify its stability for industrial applications as pigments. The characterization was accomplished using thermal analyses, X

Externí odkaz: https://doaj.org/article/f719169c0846467a95ff8f4640166b01

Selection and Optimization of a K0.5Na0.5NbO3-Based Material for Environmentally-Friendly Magnetoelectric Composites

Autor: Michel Venet, Washington Santa-Rosa, Paulo Sergio da Silva, Jean-Claude M’Peko, Pablo Ramos, Harvey Amorín, Miguel Algueró

Publikováno v: Materials, Vol 13, Iss 3, p 731 (2020)

Li- and Ta-modified K 0.5 Na 0.5 NbO 3 compounds are among the most promising lead-free ferroelectrics for high-sensitivity piezoelectric ceramic materials, and are potentially capable of replacing Pb(Zr,Ti)O 3 . They are also being investigated as p

Externí odkaz: https://doaj.org/article/9f0ffccd9eb8480e8eb27c9ad71f8522

Cation size effects-modified phase and PTCR development in Er3+ and Ca2+ co-doped BaTiO3 ceramics during sintering

Autor: Ronaldo Santos da Silva, Jean-Claude M'Peko, Lilian da Costa Fontes, Antonio Carlos Hernandes

Publikováno v: Materials Research, Vol 12, Iss 3, Pp 287-290 (2009)

Development of the positive temperature coefficient of resistivity (PTCR) in Er3+ and Ca2+ co-doped ferroelectric BaTiO3 was studied in this work, with Er3+ being used to act as a donor doping. Irrespective of all the materials showing high densities

Externí odkaz: https://doaj.org/article/fb2787e1c94444829a362fa7c27a2b86

Unveiling the high-temperature dielectric response of $$\text {Bi}_{0.5}\text {Na}_{0.5}\text {TiO}_{3}$$ Bi 0.5 Na 0.5 TiO 3

Autor: Julio Cesar Camilo Albornoz Diaz, Jean-Claude M’Peko, Michel Venet, Paulo Sergio da Silva

Publikováno v: Scientific Reports, Vol 10, Iss 1, Pp 1-11 (2020)

Understanding the physics behind changes in dielectric permittivity and mechanical response with temperature and frequency in lead-free ferroic materials is a fundamental key to achieve optimal properties and to guarantee good performance in the tech

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doajarticles::a6ae95249ce4035f2b154903a77ed421
http://link.springer.com/article/10.1038/s41598-020-75859-z

Innovative multifunctional hybrid photoelectrode design based on a ternary heterojunction with super-enhanced efficiency for artificial photosynthesis

Autor: Jean-Claude M’Peko, Y. Mendez-González, Antonio Otavio T. Patrocinio, Lucas L. Nascimento, José de los Santos Guerra, Éder José Do Carmo, Wayler S. dos Santos, Ruyan Guo, Amar S. Bhalla

Publikováno v: Scientific Reports, Vol 10, Iss 1, Pp 1-14 (2020)
Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual)
Universidade de São Paulo (USP)
instacron:USP
Scientific Reports

Electrochemical cells for direct conversion of solar energy to electricity (or hydrogen) are one of the most sustainable solutions to meet the increasing worldwide energy demands. In this report, a novel and highly-efficient ternary heterojunction-st

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0b79725fa73b6847baf8b81635c28421
http://link.springer.com/article/10.1038/s41598-020-67768-y