Hot-pressed ceramic specimens were prepared, and their electrical properties were measured (table 107). It was found that Na0.68Mg0.34Ti0.66O2, which had a laminar structure of -NaFeO2 type, exhibited the highest purely ionic conductivity (0.003S/cm at 300C).

V.B.Nalbandyan: Izvestiya Akademii Nauk SSSR - Neorganicheskie Materialy, 1991, 27[5], 1006-10. [Inorganic Materials, 1991, 27[5], 838-421

 

 

 

Table 107

Conductivity Parameters for Na8(Mg,Ti)5O14

 

Material

σ300C

σo (S/cm)

E (kJ/mol)

Na8.26Mg0.13Ti4.87O14

6 x 10-5

6 x 105

79

Na8.5Mg0.25Ti4.75O14

1.2 x 10-4

2.5 x 105

71.8

Na8.74Mg0.37Ti4.63O14

2.4 x 10-5

1.7 x 105

77.8

Na9Mg0.5Ti4.5O14

8 x 10-6

1.1 x 105

80.9

Na0.8Mg0.4Ti3.6O8

9 x 10-8

2 x 105

103

Na0.9Mg0.45Ti1.55O4

1.5 x 10-4

1 x 106

77.2

Na0.68Mg0.34Ti0.66O2

3 x 10-3

4.1 x 104

48

Na4.4Mg0.2Ti4.8O12

2.8 x 10-4

4.0 x 104

59.1

Na4.6Mg0.3Ti4.7O12

2.3 x 10-4

2.5 x 105

69

Na4MgTiO9

1.1 x 10-3

1.1 x 106

68.3