TY - GEN
T1 - New perovskite oxides of the type (m1/4ln3/4)(MG 1/4Ti3/4)O3 (M = Na, Li; Ln = La, Nd, Sm)
T2 - 8th Pacific Rim Conference on Ceramic and Glass Technology, PACRIM-8
AU - Bian, J. J.
AU - Yuan, L. L.
AU - Ubic, R.
PY - 2010
Y1 - 2010
N2 - New complex perovskite compounds La3/4Na1/4(Mg 1/4Ti3/4)O3(NLMT), Nd3/4Li 1/4(Mg1/4Ti3/4)O3 (LNMT) and Sm 3/4L1/4(Mg1/4Ti3/4)O3 (LSMT) have been synthesized by solid state reaction process. Their crystal structure and microwave dielectric properties were investigated by using XRD Retiveld method, TEM, and network analyzer, All samples exhibited single perovskite phase with the same space group Pbnm (a+a -c+). No indication of cation ordering was found in these samples; however, the relative strength of superlattice reflections suggests that the degree of tilt of oxygen octahedra in LNMT and LSMT is higher than it is in NLMT, in agreement with Rietveld refinements of x-ray diffraction data. The dielectric permittivity decreased and Q×f value increased in the sequence of NLMT, LNMT and SLMT. All samples exhibited negative value of temperature coefficient of resonant frequency (τf).
AB - New complex perovskite compounds La3/4Na1/4(Mg 1/4Ti3/4)O3(NLMT), Nd3/4Li 1/4(Mg1/4Ti3/4)O3 (LNMT) and Sm 3/4L1/4(Mg1/4Ti3/4)O3 (LSMT) have been synthesized by solid state reaction process. Their crystal structure and microwave dielectric properties were investigated by using XRD Retiveld method, TEM, and network analyzer, All samples exhibited single perovskite phase with the same space group Pbnm (a+a -c+). No indication of cation ordering was found in these samples; however, the relative strength of superlattice reflections suggests that the degree of tilt of oxygen octahedra in LNMT and LSMT is higher than it is in NLMT, in agreement with Rietveld refinements of x-ray diffraction data. The dielectric permittivity decreased and Q×f value increased in the sequence of NLMT, LNMT and SLMT. All samples exhibited negative value of temperature coefficient of resonant frequency (τf).
KW - crystal structure
KW - microwave dielectric properties
KW - perovskite oxides
KW - solid state reaction process
UR - https://www.scopus.com/pages/publications/77955619695
UR - https://scholarworks.boisestate.edu/mse_facpubs/62
U2 - 10.1002/9780470909850.ch16
DO - 10.1002/9780470909850.ch16
M3 - Conference contribution
SN - 9780470890585
T3 - Ceramic Transactions
SP - 153
EP - 164
BT - Advances in Multifunctional Materials and Systems - A Collection of Papers Presented at the 8th Pacific Rim Conference on Ceramic and Glass Technology, PACRIM 8
Y2 - 31 May 2009 through 5 June 2009
ER -