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Er3+-Yb3+ doped 22[3SrO.2TiO2].30[2SiO2.B2O3] glass and glass-ceramics are developed and investigated for their electrical properties. The degree of crystallization is varied by means of crystallization temperature ranging from 600 to 1000°C. In glass-ceramic samples, two major crystalline phases, Sr3Ti2O7 and TiO2, are confirmed by diffraction analysis. The best crystallized glass-ceramic (crystallization temperature 950°C) sample shows 100-1 50 times lower impedance in temperature range, 200-300°C, than the uncrystallized glass. Electrical relaxation corresponding to the crystalline phase can be isolated in frequency domain. The glass-ceramic shows a 10-100 times higher dielectric constant than the glass in lower frequency range. This dielectric constant and dissipation factor increase with increasing temperature beyond a threshold value. Curie temperature was not visible in the measured temperature range. [ABSTRACT FROM AUTHOR]