Ag+ glass-Ag2SO4 composite solid electrolyte based SO2 galvanic sensor
1999; Elsevier BV; Volume: 55; Issue: 1 Linguagem: Inglês
10.1016/s0925-4005(99)00118-5
ISSN1873-3077
AutoresS. S. Bhoga, K. Singh, Jasmirkaur Randhawa, P. D. Borkar,
Tópico(s)Analytical Chemistry and Sensors
ResumoThe ionic conductivity of 10Ag2O:30SiO2:60B2O3 glass dispersed Ag2SO4 composite solid electrolyte system, prepared by liquid phase sintering, is investigated in the temperature range from 773 to 573 K. The maximum conductivity, 2×10−3 S cm−1 (at 573 K) is achieved on 30 wt. % glass addition to Ag2SO4. The enhancement in such electrolyte systems is discussed in the light of high conducting space charge layer, formed across heterojunction (glass–crystal interface). Galvanic SO2 gas sensor using optimised composite electrolyte with Ag+Ag2SO4 solid reference is found to be more stable against long term use and thermal shocks, compared to the sensor based on pure crystalline solid electrolyte.
Referência(s)