| 铁系陶瓷湿敏材料掺杂改性与稳定性研究 |
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| 引用本文： | 刘博华,阴卫华,丛秀云,袁疆鹰,王天雕. 铁系陶瓷湿敏材料掺杂改性与稳定性研究[J]. 无机材料学报, 1993, 0(2) |
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| 作者姓名： | 刘博华 阴卫华 丛秀云 袁疆鹰 王天雕 |
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| 作者单位： | 中国科学院新疆物理所 830011(刘博华，阴卫华，丛秀云，袁疆鹰)，中国科学院新疆物理所 830011(王天雕) |
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| 基金项目： | 国家基金委项目工作结果写成,项目编号:689976025 |
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| 摘 要： | 碱金属与稀土金属掺杂对改善以 Fe_2O_3为基的陶瓷湿敏材料敏感特性与微观结构有显著作用.适量 K~+、La~(3+)离子掺入能明显提高材料本征电导影响低湿区的感湿灵敏度.借助 SEM、XPS、FI-IR 及 AAS 等研究了材料的表面特性.发现,亚稳态水溶性次相与亲水的 K~+ 离子在表面的富集、迁移以及迁移造成的损耗是影响铁系湿敏陶瓷材料稳定性的主要因素.
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| 关 键 词： | 功能陶瓷 稳定性 表面 |
Effects of Doping on the Humidity Sensitivity of Fe_2O_3 Ceramics and Studies on Its Long-Term Stability |
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| Liu Bohua Yin Weihua Chong Xiouyun Yuan Jiangying Wang Tiandiao. Effects of Doping on the Humidity Sensitivity of Fe_2O_3 Ceramics and Studies on Its Long-Term Stability[J]. Journal of Inorganic Materials, 1993, 0(2) |
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| Authors: | Liu Bohua Yin Weihua Chong Xiouyun Yuan Jiangying Wang Tiandiao |
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| Abstract: | The effect of alkaline oxide and La_2O_3 on the humidity characteristics and microstructureof Fe_2O_3 porous ceramics was investigated,the intrinsic resistance of Fe_2O_3 ceramics waslowered and the humidity sensitivity in low humidity range was affected greatly too,withproper doping of K~+,La~(3+) ions.Using SEM,XPS,FT-IR and AAS techniques,we studiedthe surface properties of doped Fe_2O_3 ceramics,and discovered that the main factors whichaffect the long-term stability of doped Fe_2O_3 ceramic material are the gathering,migration anddissipation due to migration of hydrophilic K~+ ion and water soluable metastable secondaryphase. |
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| Keywords: | Function ceramic Stability Surface |
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