Temperature Dependence of Elastic Parameters of Ionic Conductors

Ionic Conductors: Effect of Temperature on Conductivity and Mechanical Properties and Their Interrelations

“…Similar behavior of the temperature dependence of elastic constants to that shown in Figure 2 has been also observed in AgCl and AgBr [10,13,16,18,19]. These crystals have the rock-salt structure.…”

“…An explanation to the different behavior of the tem ture dependence of the elastic constants was given by arguing that is determ from the contribution of Coulomb and short-range forces that have the same whereas for and they have opposite signs, and that the effect of crystal d on and cancel each other [4,54]. Similar behavior of the temperature dependence of elastic constants to that sho Figure 2 has been also observed in AgCl and AgBr [10,13,16,18,19]. These crystals the rock-salt structure.…”

“…The temperature dependence of C 44 is small, and C 12 exhibit an intermediate variation. In addition, AgBr exhibits a stronger deviation from the linearity than AgCl [10,13,16,18,19]. As discussed for the case of PbF 2 , these observations indicate that specific force constants are more effectively interrelated with the atomic transport properties.…”

“…The behavior shown in Figure 2 suggests that the microscopic mechanisms that originate the mechanical and electrical properties have common elements. Indeed, in previous studies it has been shown that the elastic constants of ion conducting materials AgCl and AgBr deviate from the linear behavior at high temperature, whereas the elastic constants of a typical ionic crystal NaCl retain their linearity up to a temperature close to the melting point [18,19]. Thus, we may say that the temperature dependence of the elastic constant provides much insight to understand ionic conductors.…”

“…With the objective to gain a further understanding on the fundamental properties of superionic materials, we are studying systematically the mechanical properties of different materials [17][18][19][20]. In the present report, after showing briefly the previous works done in our group, results regarding the relation between ionic conduction and elastic properties in superionic glasses will be presented.…”