LSGMCF dense diffusion barrier preparation and electrical characteristics for limiting current oxygen sensor. (15th November 2022)

• Record Type: Journal Article
• Authors: Tan, Wendong; Li, Jinlian; Wang, Yakai; Wang, Fuyao; Zhang, Xiaofang; You, Jiegang; Luo, Xudong; Wang, Xiangnan
• Is Part Of: Materials science in semiconductor processing. Volume 151(2022)
• Publication Date: 2022-11-15
• Subjects: Co-pressing and co-sintering technique -- Limiting current oxygen sensor -- Electronic and total conductivities -- Sensing characteristics; Semiconductors -- Periodicals; Integrated circuits -- Materials -- Periodicals; Semiconducteurs -- Périodiques; Circuits intégrés -- Matériaux -- Périodiques; Electronic journals; 621.38152
• DOI: 10.1016/j.mssp.2022.106978
• Languages: English
• ISSNs: 1369-8001

Abstract

Abstract: La0.8 Sr0.2 (Ga0.8 Mg0.2 )1- x (Cr0.4 Fe0.6 ) x O3- δ (LSGMCF, x = 0.1, 0.3, 0.5, 0.7 and 0.9) and La0.8 Sr0.2 Ga0.8 Mg0.2 (LSGM) were synthesized by solid-state reaction with La2 O3, SrCO3, Ga2 O3, MgO, Cr2 O3 and Fe2 O3 as raw materials. By characterizing the phase analysis and micro-structure of LSGMCF, it was found that Cr and Fe dissolved in the main crystalline phase LSGM in a wide range. The effects of Cr and Fe concentrations on the electronic and total conductivity of LSGMCF were analyzed by Hebb-Wagner and Linear Sweep Voltammetry methods. The results show that when x = 0.9, it has better electronic conductivity and the highest total conductivity. LSGMCF( x = 0.9) and LSGM were prepared into limiting current oxygen sensor by co-pressing and co-sintering technique, and its sensing characteristics were studied. The oxygen sensor exhibits a limiting current in the range of 0–7% oxygen concentration at 730–790 °C. The limiting current is directly proportional to the oxygen concentration, indicating that it shows good sensing characteristics at different temperatures. In addition, its sensing performance has excellent stability between 0 -42h.