Gerhard Pfaff

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Gerhard Pfaff (2013)

Gerhard Pfaff (born October 19, 1953 in Meiningen / Thuringia ) is a German chemist and professor of inorganic solid-state chemistry . He dedicated himself in particular to industrial research and training in the field of inorganic pigments with a focus on effect pigments .

education

Gerhard Pfaff was born in Thuringia. Here he attended the Martin Luther Oberschule (Polytechnische Oberschule, POS) up to the 8th grade and then the Henfling Oberschule (Extended Oberschule, EOS) in Meiningen, where he passed the Abitur in 1972.

He then studied chemistry at the Friedrich Schiller University in Jena . In 1978 he graduated as a chemist with a thesis on special sulfur and selenium compounds of germanium in the field of inorganic solid-state chemistry.

The doctorate to Dr. rer. nat. took place in 1983 at the Mathematics and Natural Sciences Faculty of the Friedrich Schiller University Jena with a dissertation on the subject of "On the chemistry of chalcogeno complexes of germanium and silicon with element-element bonds" in the field of inorganic solid-state chemistry. A total of 8 publications resulted from this scientific work.

Professional activities

He gained his first professional experience as a chemist from 1978 to 1987 while working as a scientific assistant and then from 1987 to 1991 as senior assistant in the field of inorganic solid-state chemistry in the chemistry section. Here he was responsible for a wide range of teaching duties (internship assistant, seminar assistant, internship leader), several lectures (inorganic basic lecture, powder preparation for ceramic materials and pigments) as well as the supervision of diploma theses.

Since 1983 he has been doing research on the preparation, characterization and sintering behavior of oxide powders. He was a senior topic worker in four industrial research projects in the fields of high-performance ceramics and pigments. In 1986 and 1987 he worked for six months at the Institute for Solid State Chemistry at the University of Bordeaux with work on the preparation, characterization and sintering behavior of tin dioxide.

From 1991 he worked as laboratory manager at Merck KGaA in Darmstadt, from 1993 he was group leader and from 1994 department head for product development (effect pigments and functional materials). From 2006 to 2014 he was head of pigment and cosmetics research at Merck KGaA with responsibility for the research sites in Darmstadt, Onahama (Japan) and Savannah (USA).

Since 1992 he has maintained close contacts with the TH / TU Darmstadt , in particular by co-supervising diploma and doctoral theses. Since 1994, he has held special lectures "Perovskites: Representation, Structures, Applications" and "Inorganic Pigments" in the chemistry department of the TH / TU Darmstadt. In 1997 he received his habilitation with the thesis "Synthesis and characterization of alkaline earth titanates, stannates and zirconates as well as iron oxide powders" at the Chemistry Department of the TH Darmstadt and the award of the title of private lecturer . A total of 32 publications and 7 patents resulted from this scientific work.

In 2008, Pfaff was appointed adjunct professor in the chemistry department at TU Darmstadt. Since his habilitation, Pfaff has produced more than 50 other specialist publications and 70 patents in the field of pigments and functional materials, has given a total of more than 150 scientific lectures, has published various books and has taken care of the supervision of diploma and doctoral theses. Since 2009 he has taken over the lecture “Inorganic Materials and Materials - Effect Pigments” at the Goethe University in Frankfurt (Main) .

Main focus of work and research

  • Inorganic solid state chemistry
  • Synthesis and characterization of iron oxides, titanium dioxide, alkaline earth titanates, stannates and zirconates
  • inorganic pigments with a focus on effect pigments (pearlescent pigments, interference pigments, goniochromatic pigments, metallic effect pigments), functional pigments (electrically conductive pigments, laser-markable pigments, pigments with special properties in the infrared spectral range)
  • Use of pigments in paints, plastics, printing inks and cosmetic formulations
  • History of pigments.

Memberships and honors

  • Member of the Society of German Chemists (GDCh), active in the specialist groups "Solid State Chemistry and Materials Research" and "History of Chemistry"
  • 1998 to 2006 member of the board of the GDCh specialist group “Solid State Chemistry and Materials Research” for two terms
  • 1994 to 2012 course instructor of the GDCh seminar "Pigments - current status and new developments", which takes place every two years
  • 2010 to 2011 chairman of the GDCh local association in Darmstadt
  • Since 2000 reviewer of the German Research Foundation (DFG)
  • 2008 to 2014 member of the DIN standards committee "Pigments and Fillers"
  • Since 2017 member of the support group of the Rathgen-Forschungslabors e. V. Berlin
  • Co-organizer and member of the executive committee for international specialist conferences in the field of paints and pigments
  • Many years of experience as a referee for various journals, including Journal of Materials Chemistry, Chemistry of Materials, Chemical Communications, Chemical Society Reviews, Solid State Sciences
  • Elected member of the Leibniz Society of Sciences in Berlin since 2018 , here Secretary of the Natural and Technical Sciences class since 2019, succeeding Lutz-Günther Fleischer .

Selected book publications

  • Pearlescent pigments. Vincentz Network, Hannover 1996, ISBN 3-87870-429-1 .
  • Special Effect Pigments. In: High Performance Pigments. Wiley-VCH, Weinheim an der Bergstrasse 2002, ISBN 978-3-527-30204-8 .
  • Inorganic pigments. In: Winnacker, Küchler: Chemische Technik, Vol. 7. Wiley-VCH, Weinheim an der Bergstrasse 2004, ISBN 3-527-30772-9 .
  • Industrial Inorganic Pigments. Gunter Buxbaum, Gerhard Pfaff (eds.). 3. Edition. Wiley-VCH, Weinheim an der Bergstrasse 2006, ISBN 978-3-527-60403-6 .
  • Special effect pigments - basics and applications. 2nd Edition. Vincentz Network, Hannover 2007, ISBN 978-3-86630-895-4 .
  • Special Effect Pigments - technical basics and applications. Vincentz Network, Hannover 2008, ISBN 978-3-86630-905-0 .
  • Characterization of Pearlescent Pigments and Special Effect Pigments. In: Color Technology of Coatings. Vincentz Network, Hannover 2016, ISBN 978-3-86630-699-8 .
  • Inorganic Pigments. Walter de Gruyter, Berlin; Boston 2017, ISBN 978-3-11-048450-2 .

literature

Web links

Individual evidence

  1. ↑ Gerhard Pfaff: On the chemistry of the chalcogenides and chalcogeno complexes of germanium and silicon with element-element bonds. Dissertation A, Friedrich Schiller University Jena, Faculty of Mathematics and Natural Sciences 1983.
  2. ↑ Adalbert Feltz, Gerhard Pfaff: About glass formation and properties of chalcogenide systems. XIII. Via the connections Na6Ge2S6. 4CH3OH and Na6Ge2Se6. 4CH3OH. Z. anorg. allg. Chem. 442 (1978) pp. 41-48.
  3. ↑ Adalbert Feltz, Gerhard Pfaff: About glass formation and properties of chalcogenide systems. XXVIII. The bond energy of the Si-Si and the Ge-Ge bond in the compounds Na6Si2X6 and Na6Ge2X6 (X: S, Se). Z. anorg. allg. Chem. 504 (1983) pp. 173-178.
  4. ↑ Adalbert Feltz, Gerhard Pfaff: About glass formation and properties of chalcogenide systems. XXXIV. Na4Ge (Se2) 4 as a Model Compound for the Short Range Order of Vitreous GeSe4. J. Non-Cryst. Solids 69 (1985) pp. 425-428.
  5. ↑ Gerhard Pfaff: Synthesis and characterization of alkaline earth titanates, stannates and zirconates as well as iron oxide powders. Habilitation thesis, Technical University Darmstadt 1997.
  6. ^ Gerhard Pfaff, Adalbert Feltz, Uta Umpfenbach: Solid State Reactivity and Mechanisms in Oxide Systems. IV. On the Sintering Behavior of Hematite. Cryst. Res. Technol. 23 (1988) pp. 17-24.
  7. ^ Gerhard Pfaff: Preparation, Characterization and Sintering Behavior of Complex Titanate Powders. Cryst. Res. Technol. 26 (1991) pp. 305-311.
  8. ^ Gerhard Pfaff: Peroxide Route to Synthesize Strontium Titanate Powders of Different Composition. J. Eur. Ceram. Soc. 9 (1992) pp. 121-125.
  9. ^ Gerhard Pfaff: Sol-Gel Synthesis of Barium Titanate Powders of Various Compositions. J. Mater. Chem. 2 (1992) pp. 591-594.
  10. ^ Gerhard Pfaff: Synthesis of Calcium Titanate Powders by the Sol-Gel Process. Chem. Mater. 6 (1994) pp. 58-62.
  11. ^ Gerhard Pfaff: Synthesis of Magnesium Stannates by Thermal Decomposition of Peroxo-Precursors. Thermochim. Acta 237 (1994) pp. 83-90.
  12. ^ Gerhard Pfaff: pearlescent pigments. Chem. Our time 31 (1997) pp. 6-16.
  13. ↑ Sigrid Teaney, Gerhard Pfaff, Katsuhisa Nitta: New Effect Pigments Using Innovative substrate. Eur. Coat. J. (4/1999) pp. 90-96.
  14. ^ Gerhard Pfaff, Peter Reynders: Angle-Dependent Optical Effects Deriving from Submicron Structures of Films and Pigments. Chem. Rev. 99 (1999) pp. 1963-1981.
  15. ^ Gerhard Pfaff, Peter Gabel: Color Measurement from Many Angles. Eur. Coat. J. (6/2005) pp. 30-33.
  16. ^ Frank Jochen Maile, Gerhard Pfaff, Peter Reynders: Effect Pigments - Past, Present and Future. Progr. Org. Coat. 54 (2005) pp. 150-163.
  17. ↑ Gerhard Pfaff: Effect pigments - nano-metal oxide layers on platelet-shaped particles. PdN ChiS 55 (1/2006) pp. 26-28.
  18. ^ Corinna Ludwig, Gerhard Pfaff: Decorative Effects for the Creative Enhancement of Paper and Cardboard Products. Professional Papermaking 7 (2/2010) pp. 27–31.
  19. ^ Gerhard Pfaff, Miriam Becker: Special Effect Pigments in Cosmetics Applications. Household Personal Care Today, Monogr. Suppl. Series “Color Cosmetics” (1/2012) pp. 12-15.
  20. ^ Gerhard Pfaff, Kirsten Fritsche: A More Intense Color for All Systems. Eur. Coat. J. (11/2014) pp. 34-38.
personal data
SURNAME Pfaff, Gerhard
BRIEF DESCRIPTION German chemist and university professor (inorganic solid-state chemistry)
DATE OF BIRTH October 19, 1953
PLACE OF BIRTH Meiningen , Thuringia