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Sensitive properties of In-based compound semiconductor oxide to Cl_2 gas
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作者 赵文杰 施云波 +3 位作者 修德斌 雷廷平 冯侨华 王立全 《Journal of Semiconductors》 EI CAS CSCD 北大核心 2009年第3期83-86,共4页
Aiming at detecting Cl2 gas, this study was made on how to make In-based compound semiconductor oxide gas sensor. The micro-property and sensitivity of In-based gas sensing material were analyzed and its gas sensitive... Aiming at detecting Cl2 gas, this study was made on how to make In-based compound semiconductor oxide gas sensor. The micro-property and sensitivity of In-based gas sensing material were analyzed and its gas sensitive mechanism was also discussed. Adopting constant temperature chemical coprecipitation, the compound oxides such as In-Nb, In-Cd and In-Mg were synthesized, respectively. The products were sintered at 600 ℃ and characterized by the Scanning Electron Microscope (SEM), showing the grain size almost about 50-60 nm. The test results show that the sensitivities of In-Nb, In-Cd and In-Mg materials under the concentration of 50 × 10^-6 in Cl2 gas are above 100 times, 4 times and 10 times, respectively. The response time of In-Nb, In-Cd and In-Mg materials is about 30, 60 and 30 s, and the recovery time less than 2, 10 and 2 min, respectively. Among them, the In-Nb material was found to have a relatively high conductivity and ideal sensitivity to Cl2 gas, which showed rather good selectivity and stability, and could detect the minimum concentration of 0.5 × 10^-6 with the sensitivity of 2.2, and the upper limit concentration of 500 × 10^-6. The power loss of the device is around 220 mW under the heating voltage of 3 V. 展开更多
关键词 in2o3 Nb2O5 sensitive property chlorine gas sensor
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Study on Mg PSZ Ceramics Doped with Y_2O_3 and CeO_2
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作者 马亚鲁 袁启明 谈家琪 《Journal of Rare Earths》 SCIE EI CAS CSCD 2000年第2期105-109,共5页
Mg PSZ ceramics doped with Y 2O 3 and CeO 2 was prepared using traditional processing method. The fine grain PSZ ceramics( d c10 μm) sintered at low temperature(1550 ℃) was obtained by means of composition ... Mg PSZ ceramics doped with Y 2O 3 and CeO 2 was prepared using traditional processing method. The fine grain PSZ ceramics( d c10 μm) sintered at low temperature(1550 ℃) was obtained by means of composition design. The effects of co stabilization of Y 2O 3, CeO 2 and annealing at 1100 ℃ on material composition, microstructure and mechanical properties were studied. The results show that Y 2O 3 and CeO 2 during annealing at 1100 ℃ can inhibit subeutectoid decomposition reaction effectively, and optimize nucleation and growth of t ZrO 2 precipitates in c ZrO 2 matrix phase. The materials show transgranular and intergranular fracture characteristics, and exhibit better mechanical properties owing to the cooperative effect of stress induced transformation toughening and microcrack toughening. 展开更多
关键词 rare earths Mg PSZ ceramic doping Y 2O 3 CeO 2 mechanical property
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Catalytic property and gas sensitivity of α-Fe_2O_3 based nanometer materials 被引量:1
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作者 孙彤 沈瑜生 刘勇 《Chinese Science Bulletin》 SCIE EI CAS 1995年第15期1253-1256,共4页
Being a good gas sensitive material α-Fe<sub>2</sub>O<sub>3</sub> has been developed in a variety ofapplications. On the other hand, the perovskite-type complex oxide (ABO<sub>3</sub... Being a good gas sensitive material α-Fe<sub>2</sub>O<sub>3</sub> has been developed in a variety ofapplications. On the other hand, the perovskite-type complex oxide (ABO<sub>3</sub> B, Mn, Fe,or Co) has also been regarded as an excellent catalyst. However, there has been noattempt to get a comprehensive understanding of the relationship between the gas sensi-tivity and catalytic property of nanometer-sized α-Fe<sub>2</sub>O<sub>3</sub>. In our study coprecipitation 展开更多
关键词 Α-FE2O3 CATALYTIC PROPERTY gas sensitivity.
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