electrical resistance;
single crystals;
SrTiO3;
surface layer;
D O I:
10.4028/www.scientific.net/KEM.253.29
中图分类号:
TQ174 [陶瓷工业];
TB3 [工程材料学];
学科分类号:
0805 ;
080502 ;
摘要:
The electrical properties of the surface layer formed on Sr (Ti-0.999 Nb-0.001) O-3 single crystal were investigated as a function of oxygen partial pressure and temperature. At room temperature, a high resistive layer was found on the surface of the single crystal with thickness of about 10 mu m after annealing in the air. The resistance of the surface layer is high and insensitive to Po-2 in oxidizing atmospheres, but decreased quickly with decreasing Po-2 in reduced atmospheres at elevated temperature. The resistance decreased when temperature increased up to 1200 degrees C. The fitted activation energy of conduction is about 1.62 eV within 109 Po-2 range from -4.0 to -0.1 below 800 degrees C. This value is near reported activation energy of conduction of the grain boundary in SrTiO3.
机构:
Catalonia Inst Energy Res IREC, Jardins Dones Negre 1, Barcelona 08930, SpainTech Univ Denmark, Dept Energy Convers & Storage, DK-2800 Lyngby, Denmark
Bauitti, Federico
Morata, Alex
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机构:
Catalonia Inst Energy Res IREC, Jardins Dones Negre 1, Barcelona 08930, SpainTech Univ Denmark, Dept Energy Convers & Storage, DK-2800 Lyngby, Denmark
机构:
Tsinghua Univ, Dept Mat Sci & Engn, State Key Lab New Ceram & Fine Proc, Beijing 100084, Peoples R ChinaTsinghua Univ, Dept Mat Sci & Engn, State Key Lab New Ceram & Fine Proc, Beijing 100084, Peoples R China
Gong, W
Li, JF
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机构:
Tsinghua Univ, Dept Mat Sci & Engn, State Key Lab New Ceram & Fine Proc, Beijing 100084, Peoples R ChinaTsinghua Univ, Dept Mat Sci & Engn, State Key Lab New Ceram & Fine Proc, Beijing 100084, Peoples R China
Li, JF
Chu, XC
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机构:
Tsinghua Univ, Dept Mat Sci & Engn, State Key Lab New Ceram & Fine Proc, Beijing 100084, Peoples R ChinaTsinghua Univ, Dept Mat Sci & Engn, State Key Lab New Ceram & Fine Proc, Beijing 100084, Peoples R China
Chu, XC
Gui, ZL
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机构:
Tsinghua Univ, Dept Mat Sci & Engn, State Key Lab New Ceram & Fine Proc, Beijing 100084, Peoples R ChinaTsinghua Univ, Dept Mat Sci & Engn, State Key Lab New Ceram & Fine Proc, Beijing 100084, Peoples R China
Gui, ZL
Li, LT
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机构:
Tsinghua Univ, Dept Mat Sci & Engn, State Key Lab New Ceram & Fine Proc, Beijing 100084, Peoples R ChinaTsinghua Univ, Dept Mat Sci & Engn, State Key Lab New Ceram & Fine Proc, Beijing 100084, Peoples R China