Phase transition in NH4HSO4–porous glasses nanocomposites

被引：0
作者：
Agnieszka Ciżman
Tomasz Marciniszyn
Dirk Enke
Andrei Barascu
Ryszard Poprawski
机构：
[1] Institute of Physics,
[2] Wrocław University of Technology,undefined
[3] Institut für Technische Chemie,undefined
[4] Universität Leipzig,undefined
[5] Institut für Nichtklassische Chemie e.V.,undefined
来源：
Journal of Nanoparticle Research | 2013年 / 15卷
关键词：
Size effect; Ferroelectrics; Porous glasses nanocomposite; AHS nanocompoistes;
D O I：
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中图分类号：
学科分类号：
摘要：
The results of investigations of porous glasses (PG) and porous glasses–ammonium hydrogen sulfate ferroelectric nanocomposites (AHS–PG) are presented. On the basis of dielectric and calorimetric measurements it was shown that in the AHS–PG nanocomposites with average pore size of 44, 68, 95, and 320 nm the anomalies of dielectric permittivity and specific heat similar to those in bulk crystals AHS are observed. An influence of the mean value of pores sizes on the ferroelectric phase transition temperatures of AHS nanocrystals embedded into the porous matrices was determined. It was shown that in AHS–PG dispersion of the dielectric permittivity is observed in both para- and ferro-electric phases and above room temperature AHS–PG nanocomposites exhibit the ionic conductivity.
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  • [1] Charnaya V(2007)Ferroelectricity in an array of electrically coupled confined small particles Ferroelectrics 350 75-80
  • [2] Pirozerskii AL(2012)Pressure effect on the ferroelectric phase transition in nanosized NH J Appl Phys 112 034104-034106
  • [3] Tien C(2012)HSO Phase Tran 103 127-130
  • [4] Lee MK(1997)Phase transition in NH Solid State Comm 31 302-304
  • [5] Ciżman A(1975)H Acta Crystallogr B 227 458-465
  • [6] Marciniszyn T(2001)PO Phys Stat Sol (b) 286 213-219
  • [7] Poprawski R(2003): porous glass composites Ferroelectrics 27 272-281
  • [8] Ciżman A(1971)Ferroelectrics properties of nanosize KDP particles Acta Crystallogr B 111 1508-1510
  • [9] Marciniszyn T(1958)The structure of potassium hydrogen sulfate Phys Rev 73 K41-K45
  • [10] Rysiakiewicz-Pasek E(1982)Anomalous phase behaviour of NH Phys Stat Sol (a) 30 173-176
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