Advances in Dielectric Materials and Electronic Devices: Poster Session
Sponsored by: ACerS Electronics Division
Program Organizers: Amar Bhalla, University of Texas; Ruyan Guo, University of Texas at San Antonio; Rick Ubic, Boise State University; Matjaž Spreitzer, Jožef Stefan Institute
Tuesday 11:00 AM
October 19, 2021
Room: Exhibit Hall B
Location: Greater Columbus Convention Center
P1-11: Electric and Dielectric Characterization of [Cu, 2Ta] Dipole Substituted BaTiO3 Ceramics: Noah Smith1; Trisha Whaley1; Victoria Pellegrino1; Kaijie Ning1; Holly Shulman1; Walter Schulze1; Steven Tidrow1; 1Alfred University
Charge neutral and inter coupled aliovalant substitutes in barium titanate are designed to function as dipolar pairs for generating novel relaxor-like ferroelectrics. In this work, a complex [Cu, 2Ta] dipole pair substituted BaTiO3 ceramics were manufactured with electronic grade precursor powders to show the unique electric and dielectric behaviors. Materials properties of crystal structure, microstructures, optical bandgaps, electric resistivity, and dielectric permittivity are reported for the series of Ba[Cu, 2Ta]xTi1-3xO3 with dipole concentration from x= 0 to x=0.025. A further investigation incorporating new simple material model (NSMM) provides the fundamental understanding for these complex dipole engineered dielectrics.
P1-14: Nanoscale Dipole Engineered [Y, Ta] BaTiO3 Ceramics For Relaxor-like Ferroelectrics: Victoria Pellegrino1; Trisha Whaley1; Noah Smith1; Kaijie Ning1; Holly Shulman1; Walter Schulze1; Steven Tidrow1; 1Alfred University
Relaxor/relaxor-like ferroelectrics play significant roles in numerous electronic devices. The search for relaxor/relaxor-like ferroelectrics has primarily focused on materials with morphotropic phase boundary (MPB). Nanoscale dipole engineering is a novel alternative approach for the development of relaxor/relaxor-like ferroelectrics. In this work, nanoscale dipole-pair engineered [Y, Ta]: BaTiO3 (BaTi1-2x[Y, Ta]xO3, x = 0 to 0.05) ceramics has been manufactured based on two-step solid-reaction sintering. The dielectric relaxor behavior has been investigated from aspects of temperature, frequency, dipole concentration, crystal structure, microstructure, and optical bandgap. The results indicate that [Y, Ta] acts as an effective dipole in BaTiO3 to produce relaxor-like ferroelectric material that possesses enhanced properties.
P1-15: Novel Dipole-pair [Zn, W] Substituted BaTiO3 Ceramic Relaxor: Trisha Whaley1; Noah Smith1; Victoria Pellegrino1; Kaijie Ning1; Holly Shulman1; Walter Schulze1; Steven Tidrow1; 1Alfred University
Morphotropic phase boundary (MPB) and polymorphic phase boundary (PPB) have been widely used for relaxor ferroelectric materials innovation and lead to the finding of the typical relaxor PMN-PT which has various advanced applications but contain harmful element Pb to the environment. Dipole engineering in BaTiO3 material help create a new type of Pb-free ferroelectric relaxor that is different from the classic relaxor. In this work, we report a unique relaxor based on dipole-pair substituted [Zn, W]: BaTiO3 ceramics. Investigation of crystal structure, microstructure, and electric, dielectric and optical properties has been performed and the dipole-pair concentration-dependent relative permittivity is discussed. [Zn, W]: BaTiO3 ceramics could benefit some electronic applications that require Pb-free relaxors.
P1-16: Observations from Testing Dielectric Elastomers in Uniaxial Tension: Carolyn Haase1; Hector Medina1; 1Liberty University
Dielectric elastomers (DEs) are smart materials used in numerous modern mechatronics applications. However, the literature is invaded with inconsistent data related to their properties. Perhaps, this is due to the lack of standardized testing methods missing in reported works. This study (part of an ongoing long-term project) aims at resolving this issue by performing mechanical testing using standard ASTM D-412. Uniaxial tensile tests were performed on three commonly-used materials, VHB 4905, 4910, and Elastosil 2030. Several specimens were created with gauge lengths and widths measuring 50 mm and 15 mm, for VHB and Elastosil, respectively. Specimens were tested at strain rates of 0.01, 0.1, and 0.35 Hz, until either failure or a prescribed maximum displacement was reached. The results were analyzed in accordance with ASTM D-412. As expected, all three materials exhibited strong rate-dependent behavior. The results are compared against reported values in the literature, and discrepancies are pointed out.