The electrical conductivity of barium titanate and 0.4% (mole) La doped barium titanate ceramics have been measured in the temperature range from 30 to 170掳C with the help of a pA-meter at 1090 V d.c. It is observed that doped ceramics give better positive temperature coefficient of ...
Electrical conductivity of BaTiO3 single crystals is studied by means of AC impedance measurements on a wide range of temperature nearly up to the melting point (1580°C). We did not observe any other anomaly even at a temperature as high as 1580°C as observed in other perovskites such as...
The conductivity, Seebeck coefficient and Curie point have been measured in reduced crystals of barium titanate. The results have been interpreted in terms of a polaron hopping model, leading to an estimated mobility of 5×10 4 cm 2 V 1 sec 1 at 300° K, and an activation energy of ...
titanate ceramicsdopant levelsElectrical conductivity of two types of lanthanum-doped barium titanote ceramics with different dopant levels was measured at temperatures between 900 and 1250掳 C and P O 2 from 10 5 to 1 atm. The activation energies of the conduction for the two are interpreted ...
Defect Chemistry and Electrical Conductivity of Doped Barium Titanate Ceramics,' Based on the equilibrium behavior and the kinetic processes of the defects in donor-doped BaTiO//3 a modified PTC model is developed which represents an ex... J Daniels,KH Hardtl,D Hennings,... 被引量: 145发表...
This paper examines the influence of composition, structure, and size factor on the dielectric permittivity and electrical conductivity of polycrystalline materials. We demonstrate that, if the 3D structure of a substance remains unchanged, reducing the grain size increases its permittivity, up to 10 ...
The degradation of ac and dc conductivity, field dependence of conductivity, and activation energy were studied for paraelectric BaTiO 3 ceramic subjected... WA Schulze,LE Cross,WR Buessem - 《Journal of the American Ceramic Society》 被引量: 18发表: 2010年 Influence of sintering temperature on...
ELECTRIC conductivityEPITAXIAL layersHETEROSTRUCTURESBARIUM films (Metal coating)STRONTIUM titanate filmsBIOCHEMICAL substratesThin epitaxial films have a great potential to be used in real life applications, such as oxide-on-silicon. However, they often contain a large amount of defect...
The electrical conductivity in ferrite has been attributed to electron hopping between the two valence states of iron, at crystallographically equivalent sites. Maintaining the +3 valence state of octahedral Fe ions is thus a prerequisite for achieving high resistivity. There are types of additions ...
Electrical conductivity of barium titanate single crystals at high temperatureMonte Carlosimulationadsorptionpotential barriersElectrical conductivity of BaTiO3 single crystals is studied by means of AC impedance measurements on a wide range of temperature up to the melting point ( 1550 掳C). This work ...