superionicadj.n.
/ˌsuːpərʌɪˈɒnɪk/, /ˌsjuːpərʌɪˈɒnɪk/, U.S. /ˌsupəraɪˈɑnɪk/ Physics.
A. adj.
Of an ionic solid: having a high electrical conductivity as a result of conduction by ions rather than electrons; of or relating to such solids.
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the world > matter > physics > solid state physics > superconductivity > [adjective] > having high ionic conductivity
superionic1972
1972 W. L. Roth in Jrnl. Solid State Chem. 4 60/1 Such solids, which may be called super ionic conductors, exhibit ionic conductivities that can be as large as inverse ohm-centimeters at temperatures ranging from near room temperature to 1200°C.
1992 P. Colomban & A. Novak in P. Colomban Proton Conductors iii. 39 In ionic conductors, the defects allowing the diffusion of charge carriers must be created thermally, while in superionic conductors, the potentially mobile species are already numerous.
2010 J. N. Lalena & D. A. Cleary Princ. Inorg. Materials Design (ed. 2) iii. 143 The silicates Na5BSi4O12 (B = Fe, In, Sc, Y, La, Sm) and the nasicons, which are silicophosphates.., are famous for superionic conduction.
B. n.
A superionic substance.
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the world > matter > physics > solid state physics > superconductivity > [noun] > substance having
superconductor1913
supraconductor1914
superionic1972
1972 New Scientist 11 May 321 A small and hardly known group of compounds called ‘superionics’ reveal exceptional electrical conductivity in the solid state.
2008 Jrnl. Physics: Condensed Matter 20 474211-1 Two silver ion conducting solid electrolytes, Ag2HgI4 and Ag2CdI4, representing a wide class of AgI-based halogenide superionics have been the subjects of study.
This entry has been updated (OED Third Edition, June 2012; most recently modified version published online March 2022).
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adj.n.1972