Structural and electrical properties of La(Sr,Ca)MnO3 ceramics for NTC thermistors
1
조회
0
다운로드
0
인용
0
참고문헌
키워드
초록
La0.7(Sr0.3-xCax)MnO3 (0.1≤x≤0.25) ceramics were prepared using solid-state sintering. XRD measurements showed that allspecimens showed rhombohedral polycrystalline structures. As the amount of Ca increased from 0.1 mol to 0.25 mol, sintereddensities decreased from 5.8888 g/cm3 to 5.5829 g/cm3. All specimens exhibited excellent NTCR properties of approximately0.445-0.421 %/oC. The TCR property, B25/65 constant, and resistivity at room temperature of the LSMO specimen doped with0.2 mol Ca were 0.439 %/oC, 469 K, and 3.94 104 Ω-cm, respectively.
Abstract
La0.7(Sr0.3-xCax)MnO3 (0.1≤x≤0.25) ceramics were prepared using solid-state sintering. XRD measurements showed that allspecimens showed rhombohedral polycrystalline structures. As the amount of Ca increased from 0.1 mol to 0.25 mol, sintereddensities decreased from 5.8888 g/cm3 to 5.5829 g/cm3. All specimens exhibited excellent NTCR properties of approximately0.445-0.421 %/oC. The TCR property, B25/65 constant, and resistivity at room temperature of the LSMO specimen doped with0.2 mol Ca were 0.439 %/oC, 469 K, and 3.94 104 Ω-cm, respectively.
참고문헌 (15)
- H. Yamada, , Science, 305, pp.646~648 (2004)
- J. D. Burton, , Phys. Rev. Lett, 106, pp.157203~ (2011)
- J. Hemberger, , Phys. Rev. B, 66, pp.094410~ (2002)
- M. P. de Jong, , Phys. Rev. B, 71, pp.014434~ (2005)
- S. Fritsch, , Solid State Ionics, 109, pp.229~237 (1998)
- M.M. Shokrieh, "Residual stresses in composite materials", pp.256~292 (2014), Woodhead Pub
- Sarir Uddin, "Structural investigation and improvement of microwave dielectric properties in Ca1-xBaxTiO3, low loss ceramics", Journal of Ceramic Processing Research, 21(6), pp.745~750 (2020), 청정에너지연구소[DOI]
- H. W. Nesbitt, , Am. Miner, 83, pp.305~315 (1998)
- 박건면, "Enhanced magnetic property of Mn-doped BiFeO3 nanowires fabricated by electrospinning", Journal of Ceramic Processing Research, 19(3), pp.253~256 (2018), 청정에너지연구소[DOI]
- J. Wu, , Proc. SPIE, 7381, pp.738115~ (2009)
- Abdelhak El Ghandouri, "Effect of strontium on the structural and piezoelectric properties of the sol gel processed barium titanate", Journal of Ceramic Processing Research, 19(2), pp.154~170 (2018), 청정에너지연구소[DOI]
- R. Schmidt, , Appl. Phys. Lett, 86, pp.073501~ (2005)
- N.F. Mott, "Conduction inn non-crystalline materials", pp.27~32 (1993), Oxford
- B.I. Shklovskii, "Electronic Properties of Doped Semiconductors", pp.45~ (1984), Springer
- R. Schmidt, , Phys. Rev. B, 72, pp.115101~ (2005)