แจ้งเอกสารไม่ครบถ้วน, ไม่ตรงกับชื่อเรื่อง หรือมีข้อผิดพลาดเกี่ยวกับเอกสาร ติดต่อที่นี่ ==>
หากไม่มีอีเมลผู้รับให้กรอก thailis-noc@uni.net.th
หากไม่มีอีเมลผู้รับให้กรอก thailis-noc@uni.net.th
Jitrawan Noisak. Fabrication of Lead-Free piezoelectric composites via cold sintering process. Master's Degree(Applied Chemistry). King Mongkut's Institute of Technology Ladkrabang. Central Library. : King Mongkut's Institute of Technology Ladkrabang, 2024.
Fabrication of Lead-Free piezoelectric composites via cold sintering process
Name: Jitrawan Noisak
LCSH:
Cellulose insulation
Abstract:
The cold sintering process (CSP) emerges as a promising technique for the low-temperature fabrication of ceramics and composites, enabling high-density formation under mild conditions. This study explores the application of CSP in two parts: firstly, the fabrication of y-Glycine (y-GC) ceramic, and secondly, the development of y-GC composite with ferroelectric materials (BaTi03; BT). For the y-GC ceramic, we investigated the influence of sintering temperature and duration on microstructure and electrical properties. Higher sintering temperatures and longer holding times promoted grain growth. Notably, the inclusion of transient solvent (Dl water) aided in achieving a compacted microstructure conforming to CSP mechanisms. Incorporating bacterial cellulose (BC) as a filler enhanced the hardness of the y-GC ceramic by 10%. A relative density of 97% was achieved at 120°c/24h, preserving the y polymorph of glycine without undesired transformations. Ferroelectric analyses revealed a remanent polarization of 0.004 µC/cm2 and a coercive field of 1.201 kV/cm. Subsequently, leveraging y-GC as a transient liquid phase, we fabricated high- density composites with BT powder via CSP. A y-GC/BT composite with a density of 96.7% was attained at 120°C for 6 h under 10,000 kPa uniaxial pressure. SEM-EDS mapping indicated complete precipitation-dissolution of y-GC within the CSP mechanism, filling the interstices between BT particles. XRD and FTIR analyses confirmed the absence of phase transformation in y-GC. Dielectric measurements revealed a high dielectric constant (ɛr) of 3600 and low dielectric loss (tan 8) of 1.20 at 200°C, 100 kHz, for the composite. Hysteresis loop analysis displayed a remanent polarization (Pr) of 0.55 µC/cm2 and a coercive field (Ec) of 7.25 kV/cm. This research underscores CSP's potential for low-temperature fabrication of y-GC ceramics and its capability to utilize y-GC as a transient liquid phase for crafting high-performance composites at reduced temperatures
King Mongkut's Institute of Technology Ladkrabang. Central Library
Address:
BANGKOK
Email:
Lifelong@kmitl.ac.th
Name: Naratip Vittayakorn
Role:
Thesis Advisor
Email :
naratip.vi@kmitl.ac.th
Created:
2024
Modified:
2567-11-09
Issued:
2024-11-09
วิทยานิพนธ์/Thesis
application/pdf
eng
DegreeName: Master of Science
Level: Master's Degree
Descipline: Applied Chemistry
©copyrights King Mongkut's Institute of Technology Ladkrabang
RightsAccess:
ใช้เวลา
0.030704 วินาที
Jitrawan Noisak
| Title | Contributor | Type |
|---|---|---|
| Fabrication of Lead-Free piezoelectric composites via cold sintering process
สถาบันเทคโนโลยีพระจอมเกล้าเจ้าคุณทหารลาดกระบัง Jitrawan Noisak | Naratip Vittayakorn | วิทยานิพนธ์/Thesis |
Naratip Vittayakorn
| Title | Creator | Type and Date Create |
|---|---|---|
| Dynamic hysteresis behaviors in some ferroelectric materials
มหาวิทยาลัยเชียงใหม่ Naratip Vittayakorn;Supon Ananta;Rattikorn Yimniun;Athipong Ngamjaruojana;Yongyut Laosiritaworn;Yongyut Laosiritaworn | Natthapong Wongdamnern | วิทยานิพนธ์/Thesis |
| Phase transition in antiferroelectric PbZrO₃ : mixed oxide based ceramics
สถาบันเทคโนโลยีพระจอมเกล้าเจ้าคุณทหารลาดกระบัง Naratip Vittayakorn | Usa Sukkha | วิทยานิพนธ์/Thesis |
| Fabrication of Lead-Free piezoelectric composites via cold sintering process
สถาบันเทคโนโลยีพระจอมเกล้าเจ้าคุณทหารลาดกระบัง Naratip Vittayakorn | Jitrawan Noisak | วิทยานิพนธ์/Thesis |