Thermally stimulated depolarization current analysis for the dielectric aging of Mn and V-codoped BaTiO3 multi layer ceramic capacitor

Abstract

Dielectric aging of Mn and V-codoped BaTiO3 was investigated. The increase of V concentration had little influence on aging, whereas that of Mn increased it. Thermally stimulated depolarization current (TSDC) of low Mn concentration specimen showed one peak, whereas Mn-increased specimen showed two peaks. The first and second peak is supposed to be caused by the phase transition of the undoped core region and the defect dipole of Mn such as MnTi″-VO•• or MnTi′-VO••, respectively. High TSDC associated with the defect dipole of Mn and significant aging rate experimentally demonstrates that the dielectric aging is controlled by the defect dipole.

Dielectric response and thermally stimulated depolarization current analysis of BaNd1.76Bi0.24Ti5O14 high-temperature microwave capacitors

“…(1) can be changed with the natural logarithm, and the obtained equation may describe the peak region of TSDC as a general curve, as shown in the following Eq. (2) [16][17][18][19]24].…”

“…c TSDC peak density (J max ) versus relaxation peak temperature (T m ) under different T p and E p . These data are based on TSDC measurement results [23,24]. Additionally, the possibility of peak A is associated with the dipolar relaxation.…”

“…TSDC may also be used to evaluate the activation energy of relaxation, relaxation time and the defect concentration, which enables a better understanding of the physical phenomena related to such defects [10,11,[15][16][17][18]. TSDC is frequently used to analyze polymer materials; however, TSDC is yet to be extensively employed on microwave dielectrics [16][17][18][19][20][21][22][23][24]. The measurement of TSDC spectra is briefly described as follows [17][18][19][20].…”

“…[16][17][18][19][20][21][22][23][24]. TSDC may also be used to evaluate the activation energy of relaxation, relaxation time and the defect concentration, which enables a better understanding of the physical phenomena related to such defects [10,11,[15][16][17][18].…”

Thermally Stimulated Depolarization Currents and Thermal Sampling Technique of γ-Irradiated Gelatin and PVA Homopolymers and 50/50 (wt/wt %) Blend Sample

“…The low equivalent frequency (ca. 10 -4 -10 -2 Hz) of the TSDC measurement is also useful in separating overlapping relaxations or a continuous distribution of relaxations [1][2][3][4][5][6][7][8] . Gelatin is a protein of animal origin, which can be obtained from collagen by acidic or alkaline hydrolysis.…”