The role ofγ-C_(2)H_(5)NO_(2) as a new transient liquid phase in cold sintering process of BaTiO_(3) composites  

作　　者：Jitrawan Noisak Pimchanok Ieamviteevanich Thitirat Charoonsuk Phakkhananan Pakawanit Nattapong Pinpru Wanwilai Vittayakorn Tosapol Maluangnont Panpailin Seeharaj Theerachai Bongkarn Te-Wei Chiu Naratip Vittayakorn 

机构地区：[1]Advanced Materials Research Unit,School of Science,King Mongkut’s Institute of Technology Ladkrabang,Bangkok 10520,Thailand [2]Department of Chemistry,School of Science,King Mongkut’s Institute of Technology Ladkrabang,Bangkok 10520,Thailand [3]Department of Materials Science,Faculty of Science,Srinakharinwirot University,Bangkok 10110,Thailand [4]Synchrotron Research and Applications Division,Synchrotron Light Research Institute,Nakhon Ratchasima 30000,Thailand [5]Sustainability Centre,Plastics Market Intelligent Department,Plastics Institute of Thailand,Bangkok 10110,Thailand [6]Electroceramics Research Laboratory,College of Materials Innovation and Technology,King Mongkut's Institute of Technology Ladkrabang,Bangkok 10520,Thailand [7]Department of Physics,Faculty of Science,Naresuan University,Phitsanulok 65000,Thailand [8]Research Center for Academic Excellence in Applied Physics,Faculty of Science,Naresuan University,Phitsanulok 65000,Thailand [9]Department of Materials and Mineral Resources Engineering,"National"Taipei University of Technology,Taipei 106,Taiwan,China

出　　处：《Journal of Advanced Ceramics》2024年第7期942-955,共14页先进陶瓷（英文）

基　　金：supported by King Mongkut’s Institute of Technology Ladkrabang(KMITL)under Grant Nos.KREF116501 and 2567-02-05-020;funded by Grant No.KREF016412;supported by the National Research Council of Thailand(NRCT)through Grant No.N42A650220;support from the School of Science at KMITL.T.Bongkarn acknowledges financial assistance from Naresuan University,the National Science,Research,and Innovation Fund(NSRF)under Grant No.R2567B001;the Global and Frontier Research University Fund at Naresuan University(NU)under Grant No.R2567C001.

摘　　要：Dielectric materials,such as barium titanate(BT)-based materials,have excellent dielectric properties but require high temperatures(above 1300℃)for ceramic fabrication,leading to high costs and energy loss.The cold sintering process(CSP)offers a solution to these issues and is gaining worldwide attention as an innovative fabrication route.In this work,we proposed an alternative organic ferroelectric phase,gamma-glycine(γ-GC),which acts as a transient liquid phase to fabricate high-density composites with barium titanate(BT)at low temperatures through CSP.Our findings show that the density of 15γ-GC/85BT reached 96.7%±1.6%when it was sintered at 120℃for 6 h under 10 MPa uniaxial pressure.Scanning electron microscopy‒energy dispersive X-ray spectroscopy(SEM‒EDS)mappings of the composite suggested thatγ-GC completely underwent the precipitation-dissolution process and,therefore,filled between BT particles.Moreover,X-ray diffraction(XRD)and Fourier-transform infrared spectroscopy(FTIR)confirmed the preservation ofγ-GC without undesired phase transformation.In addition,the ferroelectric and dielectric properties ofγ-GC/BT composites have been reported.The high dielectric constant(ε_(r))was 3600,and the low dielectric loss(tanδ)was 1.20 at 200℃and 100 kHz for the 15γ-GC/85BT composite.The hysteresis loop showed a remanent polarization(P_(r))of 0.55µC·cm^(−2)and a coercive field(E_(c))of 7.25 kV·cm^(−1).Our findings reaffirmed that an organic ferroelectric material(γ-GC)can act as a transient liquid phase in a CSP that can successfully and sustainably fabricateγ-GC/BT composites at low temperatures while delivering outstandingly high performance.

关 键 词：gamma-glycine(γ-GC) barium titanate(BT) cold sintering process organic ferroelectric materials dielectric properties ferroelectric properties 

分 类 号：TN04[电子电信—物理电子学] TQ174.1[化学工程—陶瓷工业]