Niall J. Donnelly
Pennsylvania State University
22 Papers
34 Citations
Niall J. Donnelly is an academic researcher from Pennsylvania State University. The author has contributed to research in topics: Dielectric & Ceramic. The author has an hindex of 15, co-authored 22 publications. Previous affiliations of Niall J. Donnelly include Queen's University Belfast.
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Papers
High Energy Density, High Temperature Capacitors Utilizing Mn-Doped 0.8CaTiO3–0.2CaHfO3 Ceramics
TL;DR: In this article, single layer air co-fired capacitors with Pt internal electrodes were prototyped for the compositions 0.8CaTiO3-0.2CaHfO3 (CHT) and 0.5 ǫ-mol% Mn-doped 0.2 CaHlfO3+Mn to yield a material with a room-temperature relative permittivity of er ~170, thermal coefficient of capacitance (TCC) of ±15.8% to ±16.4% from −50°C to 150°C,
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Addition of a Sr, K, Nb (SKN) Combination to PZT(53/47) for High Strain Applications
TL;DR: A lead zirconate titanate composition incorporating the dopants Sr, K, and Nb (SKN) in the specific ratio 4:1:3 has been studied in this article, where it was observed that the addition of SKN reduced the Curie temperature by 16°C/mol (%) and broadened the dielectric peak.
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Dielectric Characteristics of Perovskite-Structured High-Temperature Relaxor Ferroelectrics: The BiScO3–Pb(Mg1/3Nb2/3)O3–PbTiO3 Ternary System
Craig J. Stringer,Niall J. Donnelly,Thomas R. Shrout,Clive A. Randall,Edward F. Alberta,Wesley S. Hackenberger +5 more
TL;DR: In this article, a new compositional family of relaxor ferroelectrics was investigated based on the high-temperature Bi(Me)O 3 -PbTiO 3 ferroelectric perovskite family.
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Dielectric and electromechanical properties of Pb(Mg1/3,Nb2/3)O3–PbTiO3 thin films grown by pulsed laser deposition
TL;DR: Pulsed laser deposition was used to grow thin films of several compositions from the Pb(Mg1/3,Nb2/3)O3-PbTiO3 (PMN-PT) solid solution as dielectric layers in thin film capacitor structures.
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Mixed conduction and chemical diffusion in a Pb(Zr0.53, Ti0.47)O3 buried capacitor structure
TL;DR: In this paper, the ionic and electronic conductivities (σion,σelec) were extracted from the impedance spectra using an equivalent circuit based on the premise of mixed conduction.
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