Abstract
The temperature dependences of the moduli of elasticity cik(T) of single crystals of sodium chlorate NaClO3 and sodium bromate NaBrO3 in the temperature range 77-300 K were investigated experimentally with the help of the resonance method. It is shown that these compounds are elastically anisotropic dielectrics with elastic anisotropy factor A<1 and ratios of the Young moduli and shear moduli of the form E100>E110>E111 and G100<G110<G111. The experimental data on cik(T) were interpreted using a lattice model taking into account the central and noncentral interactions of ions in two coordination spheres. The force constants of these interactions are presented. It is shown that the model chosen describes well the temperature dependences cik(T), if both the noncentral interaction of the ions and the contribution of the vibrational part of the free energy to the moduli of elasticity are taken into account.
| Original language | English |
|---|---|
| Pages (from-to) | 1134-1139 |
| Number of pages | 6 |
| Journal | Russian Physics Journal |
| Volume | 35 |
| Issue number | 12 |
| DOIs | |
| Publication status | Published - Dec 1992 |
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Temperature dependence of the moduli of elasticity of NaClO3 and NaBrO3 single crystals. / Belomestnykh, V. N.; Ul'yanov, V. L.
In: Russian Physics Journal, Vol. 35, No. 12, 12.1992, p. 1134-1139.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Temperature dependence of the moduli of elasticity of NaClO3 and NaBrO3 single crystals
AU - Belomestnykh, V. N.
AU - Ul'yanov, V. L.
PY - 1992/12
Y1 - 1992/12
N2 - The temperature dependences of the moduli of elasticity cik(T) of single crystals of sodium chlorate NaClO3 and sodium bromate NaBrO3 in the temperature range 77-300 K were investigated experimentally with the help of the resonance method. It is shown that these compounds are elastically anisotropic dielectrics with elastic anisotropy factor A<1 and ratios of the Young moduli and shear moduli of the form E100>E110>E111 and G100<G110<G111. The experimental data on cik(T) were interpreted using a lattice model taking into account the central and noncentral interactions of ions in two coordination spheres. The force constants of these interactions are presented. It is shown that the model chosen describes well the temperature dependences cik(T), if both the noncentral interaction of the ions and the contribution of the vibrational part of the free energy to the moduli of elasticity are taken into account.
AB - The temperature dependences of the moduli of elasticity cik(T) of single crystals of sodium chlorate NaClO3 and sodium bromate NaBrO3 in the temperature range 77-300 K were investigated experimentally with the help of the resonance method. It is shown that these compounds are elastically anisotropic dielectrics with elastic anisotropy factor A<1 and ratios of the Young moduli and shear moduli of the form E100>E110>E111 and G100<G110<G111. The experimental data on cik(T) were interpreted using a lattice model taking into account the central and noncentral interactions of ions in two coordination spheres. The force constants of these interactions are presented. It is shown that the model chosen describes well the temperature dependences cik(T), if both the noncentral interaction of the ions and the contribution of the vibrational part of the free energy to the moduli of elasticity are taken into account.
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U2 - 10.1007/BF00559364
DO - 10.1007/BF00559364
M3 - Article
VL - 35
SP - 1134
EP - 1139
JO - Russian Physics Journal
JF - Russian Physics Journal
SN - 1064-8887
IS - 12
ER -