Author

R. Kriegel

Observed names: Kriegel, R., Kriegel, Ralf, R Kriegel, R. KRIEGEL, Ralf Kriegel

Institution: Fraunhofer Institute for Ceramic Technologies and Systems

Observed institutions: Ernst Abbe University of Applied Sciences Jena, Fraunhofer Institute for Ceramic Technologies and Systems, Bauhaus-Universität Weimar, Friedrich Schiller University Jena

ORCID: 0000-0001-8326-6004

Observed ORCID: 0000-0001-8326-6004

OpenAlex ID: A5055109553

Roadmap for Sustainable Mixed Ionic‐Electronic Conducting Membranes

2021 · Guoxing Chen, Armin Feldhoff, et al. · Advanced Functional Materials · 146

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Oxygen stoichiometry and expansion behavior of Ba0.5Sr0.5Co0.8Fe0.2O3−δ

2009 · R. Kriegel, R. Kircheisen, et al. · Solid State Ionics · 101

Low‐Temperature Aging Behavior of Alumina‐Toughened Zirconia

2008 · Jens Schneider, Sabine Begand, et al. · Journal of the American Ceramic Society · 100

Assessment of CO2 stability and oxygen flux of oxygen permeable membranes

2011 · Matthias Schulz, Ralf Kriegel, et al. · Journal of Membrane Science · 88

Geopolymeric binders with different fine fillers — Phase transformations at high temperatures

2009 · Anja Buchwald, Mónica Vicent, et al. · Applied Clay Science · 81

Oxygen permeation of various archetypes of oxygen membranes based on BSCF

2012 · Matthias Schulz, Ute Pippardt, et al. · AIChE Journal · 43

Structure, nonstoichiometry and magnetic properties of the perovskites Sr1−xCaxMnO3−δ

2004 · Jörg Töpfer, Ute Pippardt, et al. · Solid State Sciences · 32

Über die Verbindung Sr7Mn4O15 und Beziehungen zur Struktur von Sr2MnO4 und α‐SrMnO3

1992 · R. Kriegel, A. Feltz, et al. · Zeitschrift für anorganische und allgemeine Chemie · 27

Joining of ceramic Ba0.5Sr0.5Co0.8Fe0.2O3 membranes for oxygen production to high temperature alloys

2016 · Ragnar Kiebach, Kurt Engelbrecht, et al. · Journal of Membrane Science · 26

Flame pyrolysis: A preparation route for ultrafine powders of metastable?-SrMnO3 and NiMn2O4

1994 · R. Kriegel, J. T�pfer, et al. · Journal of Materials Science Letters · 22

Co‐firing technology for the preparation of asymmetric oxygen transporting membranes based on BSCF and Zr‐doped BSCF

2013 · U. Pippardt, J. Böer, et al. · AIChE Journal · 21

High-purity oxygen production by a dead-end Ba0.5Sr0.5Co0.8Fe0.2O3−δ tube membrane

2012 · Fangyi Liang, Heqing Jiang, et al. · Catalysis Today · 20

Sr7Mn4O15 ceramics for high temperature NTC thermistors

1999 · A. Feltz, R. Kriegel, et al. · Journal of Materials Science Letters · 20

Dilatometric determination of phase transition temperatures and oxidation temperatures on the compounds SrMnO3−y and Sr2MnO4−y′

1996 · R. Kriegel, N. Preu|gb · Thermochimica Acta · 19

Comparison of thermo-mechanical characteristics of non-doped and 3mol% B-site Zr-doped Ba0.5Sr0.5Co0.8Fe0.2O3−δ

2013 · G. Pećanac, L. Kiesel, et al. · Ceramics International · 16

Testing of high performance asymmetric tubular BSCF membranes under pressurized operation – A proof-of-concept study on a 7 tube module

2021 · Qiang Hu, Stéven Pirou, et al. · Journal of Membrane Science · 15

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Untersuchungen zur Anionendefektverteilung in Sr 2 MnO 4-y / Investigation on the Distribution of Anion Vacancies in Sr 2 MnO 4-y

1993 · R. Kriegel, H. Borrmann, et al. · Zeitschrift für Naturforschung B · 15

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Impact of sintering temperature on permeation and long-term development of support structure and stability for asymmetric oxygen transporting BSCF membranes

2019 · R. Hoffmann, U. Pippardt, et al. · Journal of Membrane Science · 14

Investigation of combined catalyst and oxygen carrier systems for the partial oxidation of naphthalene as model tar from biomass gasification

2012 · M. Ma, M. Müller, et al. · Biomass and Bioenergy · 14

O2 Separation Using MIEC Membranes and Steam Circulation Process

2023 · Kabriil Khajryan, Thomas Storch, et al. · Chemie Ingenieur Technik · 9

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Ex-service analysis of membrane tubes after the operation in a demonstrator unit

2014 · B. Rutkowski, R. Kriegel, et al. · Journal of Membrane Science · 9

Impact of extrusion parameters on the mechanical performance of tubular BSCF-supports for asymmetric oxygen transporting membranes

2018 · R. Hoffmann, U. Pippardt, et al. · Journal of Membrane Science · 7

Ceramic Filters and Membranes

2013 · Ingolf Voigt, Jörg Adler, et al. · Wiley eBooks · 7

Variation of lattice parameters in the mixed crystal system K1−xRbxTiOPO4 and inherent stress situation in ion exchanged single crystals

2001 · Ralf Kriegel, Robert Wellendorf, et al. · Materials Research Bulletin · 7

57Fe Mössbauer study into oxygen vacancy disorder in (Ba0.5Sr0.5)(Co0.8Fe0.2)O3−

2018 · P. Gaczynski, A. Harpf, et al. · Solid State Ionics · 6

Works count: 95

Citation count: 910

H-index: 15

I10-index: 19