Zobrazeno 1 - 10
of 125
pro vyhledávání: '"Jörg Töpfer"'
Autor:
Christoph Priese, Jörg Töpfer
Publikováno v:
Alloys, Vol 1, Iss 3, Pp 288-297 (2022)
FeSiCr alloys are used as soft magnetic materials for power multilayer inductors. The alloys are typically annealed at intermediate temperatures in air during inductor fabrication to form an insulating chromium oxide layer around the alloy particles.
Externí odkaz:
https://doaj.org/article/85e3758295d3469995f8e9a2079b84b9
Publikováno v:
AIP Advances, Vol 10, Iss 2, Pp 025315-025315-7 (2020)
The partial substitution of Fe3+ by diamagnetic Me3+ in BaMexFe12-xO19 with Me = Ga and Y (0 ≤ x ≤ 2) was studied. Samples were synthesized by the mixed-oxide route and their properties were compared to BaScxFe12-xO19 ferrites. It was shown by XR
Externí odkaz:
https://doaj.org/article/c80cf6f20639460b9f731b703983e542
Publikováno v:
Materials, Vol 15, Iss 2, p 564 (2022)
We have studied the sintering behavior of CT708 LTCC tapes with large CTE of 10.6 ppm/K. This low-k dielectric LTCC material is a quartz-based glass ceramic composite system with partial crystallization of celsian upon firing. The shrinkage, densific
Externí odkaz:
https://doaj.org/article/ff0ee7a9b5f54b7587c4ce6e65660a07
Autor:
Christoph Priese, Jörg Töpfer
Publikováno v:
Magnetochemistry, Vol 7, Iss 8, p 118 (2021)
We have studied the densification, phase formation, microstructure, and permeability of stoichiometric and Fe-deficient Ni-Cu-Zn ferrites of composition Ni0.30Cu0.20Zn0.50+zFe2-zO4-(z/2) with 0 ≤ z ≤ 0.06 sintered at temperatures from 900 °C to
Externí odkaz:
https://doaj.org/article/819355f75a124103b93c58987615e2a0
Publikováno v:
AIP Advances, Vol 6, Iss 5, Pp 055202-055202-5 (2016)
The partial substitution of Fe3+ by Sc3+ in barium hexaferrite has shown to be an effective method to tailor anisotropy for many novel microwave applications. Some basic studies have revealed that this substitution leads to unusual interactions among
Externí odkaz:
https://doaj.org/article/97153c275d26428a82004bad495ae023
Publikováno v:
Journal of the American Ceramic Society. 106:1834-1847
Publikováno v:
Ceramics International. 48:22187-22195
Autor:
Christian Teichmann, Jörg Töpfer
Publikováno v:
Journal of the European Ceramic Society. 42:2261-2267
Publikováno v:
Ceramics International. 47:27849-27853
We have studied the integration of Ni–Co–Zn–Mn spinel NTC thermistor layers into LTCC multilayer modules. Sintering of the cubic spinel Ni0.5Co0.5Zn0.75Mn1.25O4 with addition of 3 wt% Bi2O3 additive at 900 °C resulted in samples with 96% densi
Autor:
Timmy Reimann, Jörg Töpfer
Publikováno v:
Journal of Materials Science: Materials in Electronics. 32:10761-10768
The phase formation, sintering behavior and electrical properties of Ni–Co–Zn–Mn spinel NTC thermistor ceramics of the series Ni0.5ZnzCo0.5Mn2−zO4 with 0 ≤ z ≤ 1 were studied. In contrast to NiMn2O4, which exhibits limited stability in ai