PMID- 34500895
OWN - NLM
STAT- PubMed-not-MEDLINE
LR  - 20210913
IS  - 1996-1944 (Print)
IS  - 1996-1944 (Electronic)
IS  - 1996-1944 (Linking)
VI  - 14
IP  - 17
DP  - 2021 Aug 25
TI  - Sintering Temperature, Frequency, and Temperature Dependent Dielectric Properties 
      of Na(0.5)Sm(0.5)Cu(3)Ti(4)O(12) Ceramics.
LID - 10.3390/ma14174805 [doi]
LID - 4805
AB  - NSCTO (Na(0.5)Sm(0.5)Cu(3)Ti(4)O(12)) ceramics have been prepared by reactive 
      sintering solid-state reaction where the powder was prepared from the elemental 
      oxides by mechanochemical milling followed by conventional sintering in the 
      temperature range 1000-1100  degrees C. The influence of sintering temperature on the 
      structural and dielectric properties was thoroughly studied. X-ray diffraction 
      analysis (XRD) revealed the formation of the cubic NSCTO phase. By using the 
      Williamson-Hall approach, the crystallite size and lattice strain were 
      calculated. Scanning electron microscope (SEM) observations revealed that the 
      grain size of NSCTO ceramics is slightly dependent on the sintering temperature 
      where the average grain size increased from 1.91 +/- 0.36 mum to 2.58 +/- 0.89 mum with 
      increasing sintering temperature from 1000  degrees C to 1100  degrees C. The ceramic sample 
      sintered at 1025  degrees C showed the best compromise between colossal relative 
      permittivity (epsilon' = 1.34 x 10(3)) and low dielectric loss (tandelta = 0.043) values at 
      1.1 kHz and 300 K. The calculated activation energy for relaxation and conduction 
      of NSCTO highlighted the important role of single and double ionized oxygen 
      vacancies in these processes.
FAU - Kotb, Hicham Mahfoz
AU  - Kotb HM
AUID- ORCID: 0000-0001-6437-8131
AD  - Department of Physics, College of Science, King Faisal University, P.O. Box 400, 
      Al-Ahsa 31982, Saudi Arabia.
AD  - Physics Department, Faculty of Science, Assiut University, Assiut 71516, Egypt.
FAU - Khater, Hassan A
AU  - Khater HA
AD  - Department of Physics, College of Science, King Faisal University, P.O. Box 400, 
      Al-Ahsa 31982, Saudi Arabia.
AD  - Physics Department, Faculty of Science, Assiut University, Assiut 71516, Egypt.
FAU - Saber, Osama
AU  - Saber O
AUID- ORCID: 0000-0002-1840-2732
AD  - Department of Physics, College of Science, King Faisal University, P.O. Box 400, 
      Al-Ahsa 31982, Saudi Arabia.
AD  - Egyptian Petroleum Research Institute, Nasr City, P.O. Box 11727, Cairo 11765, 
      Egypt.
FAU - Ahmad, Mohamad M
AU  - Ahmad MM
AUID- ORCID: 0000-0002-4634-3266
AD  - Department of Physics, College of Science, King Faisal University, P.O. Box 400, 
      Al-Ahsa 31982, Saudi Arabia.
AD  - Department of Physics, Faculty of Science, The New Valley University, El-Kharga 
      72511, Egypt.
LA  - eng
GR  - 1811006/Deanship of Scientific Research, King Faisal University/
PT  - Journal Article
DEP - 20210825
PL  - Switzerland
TA  - Materials (Basel)
JT  - Materials (Basel, Switzerland)
JID - 101555929
PMC - PMC8432498
OTO - NOTNLM
OT  - dielectric properties
OT  - impedance spectroscopy
OT  - sintering
COIS- The authors declare no conflict of interest.
EDAT- 2021/09/11 06:00
MHDA- 2021/09/11 06:01
PMCR- 2021/08/25
CRDT- 2021/09/10 01:01
PHST- 2021/07/12 00:00 [received]
PHST- 2021/08/17 00:00 [revised]
PHST- 2021/08/19 00:00 [accepted]
PHST- 2021/09/10 01:01 [entrez]
PHST- 2021/09/11 06:00 [pubmed]
PHST- 2021/09/11 06:01 [medline]
PHST- 2021/08/25 00:00 [pmc-release]
AID - ma14174805 [pii]
AID - materials-14-04805 [pii]
AID - 10.3390/ma14174805 [doi]
PST - epublish
SO  - Materials (Basel). 2021 Aug 25;14(17):4805. doi: 10.3390/ma14174805.