Effect of compositional variations in the lead lanthanum zirconate stannate titanate system on electrical properties

Journal Article · Sun Dec 01 00:00:00 EST 1996 · Journal of the American Ceramic Society

DOI:https://doi.org/10.1111/j.1151-2916.1996.tb08108.x· OSTI ID:422739

Markowski, K; Park, S E; Yoshikawa, Shoko; Cross, L E ^[1]

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1. Pennsylvania State Univ., University Park, PA (United States). Materials Research Lab.

The purpose of this work was to evaluate the effect of compositional modifications on the electrical properties of lead lanthanum zirconate stannate titanate (PLZST) ceramics, as well as to examine their electrically induced phase-change behavior. Variations in the Ti:Sn ratio were evaluated. Increased Ti{sup 4+} content produced the following: decreased switching field, related to an increased antiferroelectric-ferroelectric (AFE-FE) transition temperature; constant hysteresis ({Delta}E) correlated with a constant temperature of the maximum dielectric constant (T{sub max}); a sharper dielectric-constant maximum peak; and increased room-temperature dielectric constant (K). Variations in the Zr:Sn ratio also were evaluated. Increased Zr{sup 4+} content produced the following: increased hysteresis with increased T{sub max}, decreased maximum dielectric constant, and decreased switching field with increased AFE-FE transition temperature (T{sub AFE-FE}). From these results, with respect to compositional modifications, the AFE-FE switching field (E{sub AFE-FE}) and {Delta}E were observed to be dependent strongly on T{sub AFE-FE} and T{sub max}, respectively. Negligible change existed in the strain achievable at the switching field, which remained constant for all compositions at {approximately}0.16%. The significance of this research was the ability demonstrated to tailor the properties of phase-change materials through compositional modifications.

• Sponsoring Organization: USDOE
• OSTI ID: 422739
• Journal Information: Journal of the American Ceramic Society, Vol. 79, Issue 12; Other Information: PBD: Dec 1996
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
LEAD OXIDES
CRYSTAL-PHASE TRANSFORMATIONS
ELECTRICAL PROPERTIES
LANTHANUM OXIDES
ZIRCONIUM OXIDES
TIN OXIDES
TITANIUM OXIDES
SAMPLE PREPARATION
CHEMICAL COMPOSITION
SINTERING
HOT PRESSING
SCANNING ELECTRON MICROSCOPY
X-RAY DIFFRACTION
ELECTRIC FIELDS
TRANSITION TEMPERATURE
HYSTERESIS
STRAINS
EXPERIMENTAL DATA