Effect of In-doping on the microstructure and CH4-sensing ability of porous CaZrO3/MgO composites
Effect of In-doping on the microstructure and CH4-sensing ability of porous CaZrO3/MgO composites
复制标题
In掺杂对多孔CaZrO3/MgO复合材料微观结构和CH4传感能力的影响
DOI：
10.1016/s0955-2219(01)00405-8
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发表时间：
2002
影响因子：
5.7
通讯作者：
T. Ohji
中科院分区：
文献类型：
--
作者：
Yoshikazu Suzuki;M. Awano;N. Kondo;T. Ohji
以CaMg（CO 3）2、ZrO 2和In 2 O3为原料，添加质量分数为0.5%的LiF，采用无压反应烧结法制备了In掺杂CaZrO 3/MgO多孔复合材料（CaZr0.95In0.05O2.975/MgO In掺杂的复合材料具有均匀的开孔结构，类似于之前报道的多孔CaZrO 3/MgO复合材料，但它们的孔径变得稍大。在600-900 °C下研究了氩气和空气气氛中的CH 4传感特性。结果表明，In的掺杂在空气中能有效地提高CH_4 ~-的灵敏度，而在氩气中则降低了CH_4 ~-的灵敏度。这些结果可以定性地解释由In掺杂引起的氧空位的增加。
Porous In-doped CaZrO3/MgO composites (nominally, CaZr0.95In0.05O2.975/MgO and CaZr0.90In0.10O2.95/MgO) were prepared by pressureless reactive sintering of CaMg(CO3)2, ZrO2and In2O3with 0.5 mass% LiF additive. The In-doped composites had a uniform open-porous microstructure, similarly to the porous CaZrO3/MgO composites as reported before, but their pore-size became slightly larger. The CH4-sensing properties both in argon and air atmospheres were investigated at 600–900 °C. It was found that the In-doping was effective to increase the CH4-sensitibity in air for all temperature range, whereas it decreased the CH4-sensitibity in argon. These results can be qualitatively explained by the increase in oxygen vacancies induced by the In-doping.