| Electric characteristics of Nd_2O_3 doped BaTiO_3 ceramics |
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| 作者姓名： | 郝素娥 韦永德 |
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| 作者单位： | Dept. of Applied Chemistry，Harbin Institute of Technology，Dept. of Applied Chemistry，Harbin Institute of Technology Harbin 150001，China，Harbin 150001，China |
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| 基金项目： | SponsoredbytheMajorProjectofHeilongjiangProvince(GrantNo.GB0 2A3 0 1) . |
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| 摘 要： | 0 INTRODUCTIONBaTiO3hasbeenextensivelystudiedandwidelyuti lizedasaceramicmaterialforelectronicapplications .TheuseofadditivespermitsvaryingoftheCurietemperatureandpresentsapeculiarvariationoftheresistancewithtemperature1,2 ] .Commonadditivesaredopantionssuchasyttrium ,whichsubstituteforbariumandpromotean typesemiconductivity .Therare earthelementsinBa TiO3ceramicscouldlowertheresistivitiy ,improvethedi electriccharacteristicsanddecreasethesinteringtempera turenoticeably3,4 ] ,sotheim…
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Electric characteristics of Nd2O3 doped BaTiO3 ceramics |
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| HAO Su-e,WEI Yong-de.Electric characteristics of Nd_2O_3 doped BaTiO_3 ceramics[J].Journal of Harbin Institute of Technology,2003,10(4). |
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| Authors: | HAO Su-e WEI Yong-de |
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| Affiliation: | Dept. of Applied Chemistry, Harbin Institute of Technology, Harbin 150001, China |
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| Abstract: | Nd2O3 doped BaTiO3ceramics( the additive content was respectively 0. 001,0. 002, 0. 003, 0. 005,O. 01 molar ratio)were prepared by Sol-Gel method to study their dielectric characteristics and electric conductivities through X-ray photoelectron spectrum (XPS). The results showed that the dielectric characteristics of Nd2O3 doped BaTiO3 ceramics were improved by doping. When Nd2O3 content was 0. 003 mol, the results were even better, the dielectric constant was increased, the dielectric loss was decreased, the Curie-temperature (Tc) was 110 ℃, and the frequency characteristic was also good. The resistivity of Nd2O3 doped BaTiO3 ceramics was lower than that of pure BaTiO3 ceramics, when Nd2O3 content was 0. 001 mol,the resistivity was but the grain boundary resistance showed PTC effect, and the grain boundary resistance was larger than that of the grain resistance, so the PTC effect originated from the grain boundary. The analysis of the element binding energy through X-ray photoelectron spectrum were indicated that the quantivalence of Ba2 + and Ti4+ in Nd2O3doped BaTiO3 ceramics was variable, and resulted in the improvement of the conductibility of BaTiO3 ceramics. |
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| Keywords: | BaTiO_3 ceramics Nd_2O_3 doped dielectric characteristic electric conductivity |
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