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"Mechanical strength"

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"Mechanical strength"

Development of Textured 0.37PMN-0.29PIN-0.34PT Ceramics- Based Multilayered Actuator for Cost-Effective Replacement of Single Crystal-Based Actuators
Temesgen Tadeyos Zate, Jeong-woo Sun, Nu-ri Ko, Bo-kun Koo, Hye-lim Yu, Min-soo Kim, Woo-jin Choi, Soon-jong Jeong, Jae-ho Jeon, Wook Jo
J Korean Inst Electr Electron Mater Eng 2023;36(4):362-368.   Published online July 1, 2023
DOI: https://doi.org/10.4313/JKEM.2023.36.4.6
Multilayered actuators using Pb(Mg1/3Nb2/3)O3-Pb(In1/2Nb1/2)O3-PbTiO3 (PMN-PIN-PT) crystals have demonstrated excellent properties, but are costly and lack mechanical strength. Textured PMN-PIN-PT ceramics exhibit robust mechanical strength and comparable properties to their single crystals form. However, the development of multilayered actuators using textured PMN-PIN-PT ceramics has not been achieved until now. This study presents the development of a multilayered actuator using textured 0.37PMN-0.29PIN-0.34PT ceramics with an Ag0.9/Pd0.1 inner electrode, co-fired at 950℃. A random 0.37PMN- 0.29PIN-0.34PT ceramics multilayered actuator was also developed for comparison. The multilayered actuator consisted of 9 ceramic layers (36 μm thickness) with an overall actuator thickness of 0.401 mm. The textured and random 0.37PMN-0.29PIN- 0.34PT ceramics-based multilayered actuators achieved displacements of 0.61 μm (0.15% strain) and 0.23 μm (0.057% strain) at a low applied peak voltage of 100 V. These results suggest that the developed multilayered actuator using high-performance textured 0.37PMN-0.29PIN-0.34PT ceramics has the potential to replace expensive single crystal-based actuators costeffectively.
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High Voltage Engineering : The Evaluation of Thermal Aging Characteristics in Insulating Materials of the Pole Transformers
Byeong Seong Lee, Il Geun Song, Jae Bong Lee, Sang Og Han
J Korean Inst Electr Electron Mater Eng 2003;16(12):1136-1141.   Published online December 1, 2003
DOI: https://doi.org/10.4313/JKEM.2003.16.12.1136
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Superconductor,Magnetic Materials : The Effects of Alloying-Element Additions to Ag Sheath on Thermal Conductivity and Properties of Bi-2223 Superconductor Tapes
Seok Hem Jang, Jung Ho Kim, Jun Hyung Lim, Kyu Tae Kim, Jin Ho Joo, Bong Ki Ji, John Slavko Volf, Hua Kun Liu, Miles Apperley
J Korean Inst Electr Electron Mater Eng 2003;16(7):627-633.   Published online July 1, 2003
DOI: https://doi.org/10.4313/JKEM.2003.16.7.627
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