Thomas Steigerwald

2022

• Schimmel S., Salamon M., Tomida D., Kobelt I., Heinlein L., Kimmel AC., Steigerwald T., Ishiguro T., Honda Y., Chichibu SF., Amano H., Schlücker E., Wellmann P.:
  In Situ Monitoring Technologies as Prospective Validation Tools for Numerical Simulations of Ammonothermal Crystal Growth
  7th European Conference on Crystal Growth (Paris, 25.07.2022 - 27.07.2022)
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2021

• Steigerwald T., Schlücker E.:
  Direct Determination of Viscosity of Supercritical Solutions
  In: Elke Meissner, Rainer Niewa (Hrsg.): Ammonothermal Synthesis and Crystal Growth of Nitrides, Cham: Springer Science and Business Media Deutschland GmbH, 2021, S. 117-153 (Springer Series in Materials Science, Bd.304)
  ISBN: 978-3-030-56305-9
  DOI: 10.1007/978-3-030-56305-9_8
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2020

• Schimmel S., Kobelt I., Heinlein L., Kimmel AC., Steigerwald T., Schlücker E., Wellmann P.:
  Flow stability, convective heat transfer and chemical reactions in ammonothermal autoclaves—insights by in situ measurements of fluid temperatures
  In: Crystals 10 (2020), S. 1-18
  ISSN: 2073-4352
  DOI: 10.3390/cryst10090723
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2018

• Kimmel AC., Malkowski TF., Griffiths S., Hertweck B., Steigerwald T., Freund L., Neumeier S., Göken M., Speck JS., Schlücker E.:
  High-temperature corrosion of Inconel (R) Alloy 718, Haynes (R) 282 (R) Alloy and CoWAlloy1&2 in supercritical ammonia/ammonium chloride solutio
  In: Journal of Crystal Growth 498 (2018), S. 289-300
  ISSN: 0022-0248
  DOI: 10.1016/j.jcrysgro.2018.06.018
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• Schimmel S., Duchstein P., Steigerwald T., Kimmel AC., Schlücker E., Zahn D., Niewa R., Wellmann P.:
  In situ X-ray monitoring of transport and chemistry of Ga-containing intermediates under ammonothermal growth conditions of GaN
  In: Journal of Crystal Growth 498 (2018), S. 214-223
  ISSN: 0022-0248
  DOI: 10.1016/j.jcrysgro.2018.06.024
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2017

• Baser HH., Schwieger W., Freitag D., Steigerwald T., Schlücker E.:
  Solubility Studies of Sodium Azide in Liquid Ammonia by in situ Ultrasonic Velocity Measurement
  In: Chemical Engineering & Technology (2017)
  ISSN: 0930-7516
  DOI: 10.1002/ceat.201700146
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• Schimmel S., Koch M., Macher P., Kimmel AC., Steigerwald T., Alt N., Schlücker E., Wellmann P.:
  Solubility and dissolution kinetics of GaN in supercritical ammonia in presence of ammonoacidic and ammonobasic mineralizers
  In: Journal of Crystal Growth 479 (2017), S. 59-66
  ISSN: 0022-0248
  DOI: 10.1016/j.jcrysgro.2017.09.027
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• Schimmel S., Meisel M., Hertweck B., Steigerwald T., Nebel C., Alt N., Schlücker E., Wellmann P.:
  Chemical stability of carbon-based inorganic construction materials for in situ x-ray measurements of ammonothermal crystal growth of nitrides
  5th German-Swiss Conference on Crystal Growth (Freiburg, 8.03.2017 - 10.03.2017)
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2016

• Kimmel AC., Hertweck B., Steigerwald T., Alt N., Schlücker E.:
  Corrosion Behaviour of Nickel and Cobalt Based Super Alloys in Supercritical Ammonia Containing Acidic Mineralizers NH4F or NH4Cl
  EMSF (Essen, 8.05.2016 - 11.05.2016)
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• Schimmel S., Künecke U., Meisel M., Hertweck B., Steigerwald T., Nebel C., Alt N., Schlücker E., Wellmann P.:
  Chemical stability of carbon-based inorganic materials for in situ x-ray investigations of ammonothermal crystal growth of nitrides
  In: Journal of Crystal Growth 456 (2016), S. 33-42
  ISSN: 0022-0248
  DOI: 10.1016/j.jcrysgro.2016.08.067
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• Steigerwald T., Kimmel AC., Hertweck B., Alt N., Schlücker E.:
  Solubility Studies of Gallium Nitride in Supercritical Ammonia Containing NH4F
  EMSF (Essen, 8.05.2016 - 11.05.2016)
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2015

• Hertweck B., Schimmel S., Steigerwald T., Alt N., Wellmann P., Schlücker E.:
  Ceramic liner technology for ammonoacidic synthesis
  In: Journal of Supercritical Fluids 99 (2015), S. 76-87
  ISSN: 0896-8446
  DOI: 10.1016/j.supflu.2015.01.017
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• Kimmel AC., Hertweck B., Steigerwald T., Alt N., Schlücker E.:
  Applicability and Corrosion Behavior of Different Nickel and Cobalt Based Superalloys in Ammonoacidic Crystal Growth Process
  IWBNS-IX (Wonju, 2.11.2015 - 6.11.2015)
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• Schimmel S., Lindner M., Steigerwald T., Hertweck B., Richter TM., Künecke U., Alt N., Niewa R., Schlücker E., Wellmann P.:
  Determination of GaN solubility in supercritical ammonia with NH4F and NH4Cl mineralizer by in situ x-ray imaging of crystal dissolution
  In: Journal of Crystal Growth 418 (2015), S. 64-69
  ISSN: 0022-0248
  DOI: 10.1016/j.jcrysgro.2015.02.020
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2014

• Hertweck B., Steigerwald T., Kimmel AC., Alt N., Schlücker E.:
  Corrosion resistance of different superalloys in ammonoacidic environment
  4th ISHA (Bordeaux, 26.10.2014 - 29.06.2017)
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• Schimmel S., Künecke U., Baser HH., Steigerwald T., Hertweck B., Alt N., Schlücker E., Schwieger W., Wellmann P.:
  Towards X-ray in-situ visualization of ammonothermal crystal growth of nitrides
  In: Physica Status Solidi (C) Current Topics in Solid State Physics 11 (2014), S. 1439-1442
  ISSN: 1862-6351
  DOI: 10.1002/pssc.201300656
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• Schimmel S., Künecke U., Steigerwald T., Hertweck B., Alt N., Schlücker E., Wellmann P.:
  In Situ Visualization of GaN Crystals in Ammonothermal High Pressure Autoclaves by X-ray Imaging
  German Conference on Crystal Growth (Halle, 12.03.2014 - 14.03.2014)
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• Steigerwald T., Alt N., Hertweck B., Niewa R., Schlücker E., Zhang S.:
  Applicability of metals as liner materials for ammonoacidic crystal growth
  In: Chemical Engineering & Technology 37 (2014), S. 1835-1844
  ISSN: 0930-7516
  DOI: 10.1002/ceat.201400414
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• Steigerwald T., Alt N., Hertweck B., Schlücker E.:
  Corrosive degeneration of autoclaves for the ammonothermal synthesis: Experimental approach and first results
  In: Chemical Engineering & Technology 37 (2014), S. 1903-1906
  ISSN: 0930-7516
  DOI: 10.1002/ceat.201300719
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• Steigerwald T., Alt N., Hertweck B., Schlücker E.:
  Feasibility of density and viscosity measurements under ammonothermal conditions
  In: Journal of Crystal Growth 403 (2014), S. 59-65
  ISSN: 0022-0248
  DOI: 10.1016/j.jcrysgro.2014.06.013
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• Steigerwald T., Hertweck B., Alt N., Schlücker E.:
  Different corrosion behaviour of autoclaves made of nickel base alloy 718 in ammonobasic and ammonoacidic environments
  In: Journal of Supercritical Fluids 95 (2014), S. 158-166
  ISSN: 0896-8446
  DOI: 10.1016/j.supflu.2014.08.006
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2012

• Roßmann M., Bräuer A., Dowy S., Steigerwald T., Leipertz A., Schlücker E.:
  Solute solubility as criterion for the appearance of amorphous particle precipitation or crystallization in the supercritical antisolvent (SAS) process
  In: Journal of Supercritical Fluids 66 (2012), S. 350-358
  ISSN: 0896-8446
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