The PANI/SBCC composites from water-soluble Polyaniline(PANI),prepared by chemical-oxide method and SmBaCu1-yCryO3+δ(y=0,0.1,0.2,0.3,0.4,0.5,0.6)(SBCC)powders,prepared by sol-gel method were analyzed through XRD,EDS,FT-IR spectra and TEM respectively. The composites were prepared by particle packing,and their sensitivities to NH3 under low temperature were studied. The results show that the sensitivities of PANI/SBCC materials to NH3 are superior to those of single PANI and SBCC under the same condition. At 60℃,the response of PANI/Sm0.5Ba0.5Cu0.8Cr0.2O3+δ(PANI/SBC80C20)reaches to 3.79 to NH3(volume fraction:100×10-6),and the re-sponse-recovery time is short.%采用化学氧化法制备了水溶性聚苯胺(PANI),用溶胶凝胶法制备了Sm0.5Ba0.5Cu1-yCryO3+δ(y=0,0.1,0.2,0.3,0.4,0.5, 0.6)(SBCC)粉体,用微粒填充法制备了PANI/SBCC复合材料.利用XRD、EDS、FT-IR、TEM多种手段对产物进行表征,研究其在较低工作温度下(60℃)对氨气的敏感性.结果表明,在同等条件下,在PANI元件、SBCC元件及PANI/SBCC元件中,PANI/Sm0.5Ba0.5Cu0.8Cr0.2O3+δ(PANI/SBC80C20)元件对NH3的气敏性能最优,对体积分数为100×10-6 NH3的灵敏度在60℃条件下达到最大值为3.79,且响应恢复时间短,还具有较好的选择性.
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