Johan Arvid Hedvall

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Johan Arvid Hedvall , called Arvid, (born January 18, 1888 in Skara , † December 24, 1974 in Gothenburg ) was a Swedish chemist who dealt with solid-state chemistry. He was a professor at the TH Chalmers in Gothenburg.

Life

Hedvall, the son of a savings bank director, studied physics, chemistry and mathematics at the University of Uppsala and the University of Göttingen from 1906 and received his doctorate in 1915 at the University of Uppsala ( on reaction products of cobalt oxides with other metal oxides at high temperatures ). In 1916 he spent a year in Göttingen with Gustav Tammann . From 1917 he was a chemist at the copper mining company in Falun and from 1919 to 1929 chemistry teacher at the Polytechnic High School in Örebro . Afterwards he was professor for chemical technology at the TH Chalmers. In 1946 he retired, but worked until 1956 as head of research in the field of building materials at the TH Chalmers. From 1944 he was also director of the university's newly established institute for silicate research.

plant

He is best known for research on solid state chemistry. In his dissertation on metal oxides he discovered the Hedvall effect: at temperatures at which the physical properties of solids change, the chemical reactivity is also increased. He found a dependence of the reactivity on the crystal form, examined surface phenomena (adsorption, catalysis) of solids and dealt with powder metallurgy, glass and applications of chemistry in construction and archeology (e.g. preservation of alabaster and destruction of ancient glasses).

Honors and memberships

In 1951 he received the Carl Friedrich Gauß Medal and in 1956 the Wilhelm Exner Medal . He was a member of the Swedish Academy of Sciences (1941), the Göttingen Academy of Sciences (1947), the Finnish Academy of Sciences (1957), the Académie des Sciences in Paris (1959), the Royal Physiographical Society in Lund, the Swedish Academy of Engineering and the Braunschweig Scientific Society (1955).

Fonts

  • Reactivity of solids, Leipzig: Barth 1938
  • Introduction to solid state chemistry, Braunschweig: Vieweg 1952 (with contributions by Roland Lindner)
  • Chemistry in the service of archeology, civil engineering, monument preservation, Gothenburg 1962
  • Solid State Chemistry: whence, where and whither, Elsevier 1966

literature

Web links

Individual evidence

  1. ↑ Holger Krahnke: The members of the Academy of Sciences in Göttingen 1751-2001 (= Treatises of the Academy of Sciences in Göttingen, Philological-Historical Class. Volume 3, Vol. 246 = Treatises of the Academy of Sciences in Göttingen, Mathematical-Physical Class. Episode 3, vol. 50). Vandenhoeck & Ruprecht, Göttingen 2001, ISBN 3-525-82516-1 , p. 107.
  2. ^ List of members since 1666: Letter H. Académie des sciences, accessed on November 24, 2019 (French).
personal data
SURNAME Hedvall, Johan Arvid
BRIEF DESCRIPTION Swedish chemist
DATE OF BIRTH January 18, 1888
PLACE OF BIRTH Skara
DATE OF DEATH December 24th 1974
Place of death Gothenburg