Abstract
Acoustic emission (AE) was observed in PZT samples during oven cooling of specimen under constant poling field, depoling, cyclical and step application of dc fields. Under a constant poling field, AE and Barkhausen emissions were observed after a certain threshold temperature both during cooling and heating. Alignment of domains in the direction of applied field during poling and randomisation of the same during depoling, seem to be responsible for the the AE observed. Under repetitive application of dc fields for short durations, decreasing AE with increasing cycles was observed. During the application of polarisation reversal fields, AE was noticed after a significant lapse of time. Already poled specimens yielded more emission during the application of polarisation reversal fields, when compared with unpoled specimens. (author). 8 refs., 5 figs.
Mallikarjuna Rao, K;
Mallikarjun Rao, S P
[1]
- University College of Science, Hyderabad (India). Dept. of Physics
Citation Formats
Mallikarjuna Rao, K, and Mallikarjun Rao, S P.
Acoustic emission from PZT ceramics during poling, depoling and application of cyclical and step dc electric fields.
India: N. p.,
1994.
Web.
Mallikarjuna Rao, K, & Mallikarjun Rao, S P.
Acoustic emission from PZT ceramics during poling, depoling and application of cyclical and step dc electric fields.
India.
Mallikarjuna Rao, K, and Mallikarjun Rao, S P.
1994.
"Acoustic emission from PZT ceramics during poling, depoling and application of cyclical and step dc electric fields."
India.
@misc{etde_101558,
title = {Acoustic emission from PZT ceramics during poling, depoling and application of cyclical and step dc electric fields}
author = {Mallikarjuna Rao, K, and Mallikarjun Rao, S P}
abstractNote = {Acoustic emission (AE) was observed in PZT samples during oven cooling of specimen under constant poling field, depoling, cyclical and step application of dc fields. Under a constant poling field, AE and Barkhausen emissions were observed after a certain threshold temperature both during cooling and heating. Alignment of domains in the direction of applied field during poling and randomisation of the same during depoling, seem to be responsible for the the AE observed. Under repetitive application of dc fields for short durations, decreasing AE with increasing cycles was observed. During the application of polarisation reversal fields, AE was noticed after a significant lapse of time. Already poled specimens yielded more emission during the application of polarisation reversal fields, when compared with unpoled specimens. (author). 8 refs., 5 figs.}
journal = []
issue = {11}
volume = {32}
journal type = {AC}
place = {India}
year = {1994}
month = {Nov}
}
title = {Acoustic emission from PZT ceramics during poling, depoling and application of cyclical and step dc electric fields}
author = {Mallikarjuna Rao, K, and Mallikarjun Rao, S P}
abstractNote = {Acoustic emission (AE) was observed in PZT samples during oven cooling of specimen under constant poling field, depoling, cyclical and step application of dc fields. Under a constant poling field, AE and Barkhausen emissions were observed after a certain threshold temperature both during cooling and heating. Alignment of domains in the direction of applied field during poling and randomisation of the same during depoling, seem to be responsible for the the AE observed. Under repetitive application of dc fields for short durations, decreasing AE with increasing cycles was observed. During the application of polarisation reversal fields, AE was noticed after a significant lapse of time. Already poled specimens yielded more emission during the application of polarisation reversal fields, when compared with unpoled specimens. (author). 8 refs., 5 figs.}
journal = []
issue = {11}
volume = {32}
journal type = {AC}
place = {India}
year = {1994}
month = {Nov}
}