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Influence of sintering schedule on the electrical properties of Mn(NO_3)_2-doped Ba_(0.92)Ca_(0.08)TiO_3 PTCR ceramics 被引量：2

Influence of sintering schedule on the electrical properties of Mn(NO_3)_2-doped Ba_(0.92)Ca_(0.08)TiO_3 PTCR ceramics
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摘要 The relationship of electrical properties of Mn-doped Ba_(0.92)Ca_(0.08)TiO_3PTCR (positive temperature coefficient resistance) ceramics with two sintering schedules wasdiscussed. Using TEM (transmission electron microscope) combined with EDS (energy dispersive X-rayspectrometer), the Mn ions distributed at grain boundaries were analyzed. The results show that thePTCR effect of Mn-doped PTCR ceramics is more dependent on the sintering schedule than those of Mnfree. The phenomenon may be caused by the valence states variance of Mn ions segregated at the grainboundaries. The relationship of electrical properties of Mn-doped Ba_(0.92)Ca_(0.08)TiO_3PTCR (positive temperature coefficient resistance) ceramics with two sintering schedules wasdiscussed. Using TEM (transmission electron microscope) combined with EDS (energy dispersive X-rayspectrometer), the Mn ions distributed at grain boundaries were analyzed. The results show that thePTCR effect of Mn-doped PTCR ceramics is more dependent on the sintering schedule than those of Mnfree. The phenomenon may be caused by the valence states variance of Mn ions segregated at the grainboundaries.
作者 CAOMinghe YUANJun CAOMingli ZHOUDongxiang
机构地区 DepartmentofMaterialsofScienceandEngineering StateKeyLaboratoryofAdvancedTechnologyforMaterialsSynthesisandProcessing DepartmentofElectronicScienceandTechnology
出处 《Rare Metals》 SCIE EI CAS CSCD 2004年第3期274-278,共5页 稀有金属（英文版）
基金 This work is financially supported by the Postdoctoral Research Foundation of the Chinese Education Ministry (No. 023202238)
关键词 positive temperature coefficient resistance grain boundaries sinteringschedule SEGREGATION potential barrier positive temperature coefficient resistance grain boundaries sinteringschedule segregation potential barrier
分类号 TQ174.75 [化学工程—陶瓷工业]
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参考文献12

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Rare Metals
2004年 第3期

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