ProgramMaster Logo
Conference Tools for MS&T21: Materials Science & Technology
Register as a New User
Submit An Abstract
Propose A Symposium
Presenter/Author Tools
Organizer/Editor Tools
About this Abstract
Meeting MS&T21: Materials Science & Technology
Symposium Controlled Synthesis, Processing, and Applications of Structural and Functional Nanomaterials
Presentation Title Low Temperature Synthesis of Metastable Tetragonal Yttria Doped Hafnia T-(Y-HfO2) Nanoparticles Through Mechanochemical Processing and Annealing
Author(s) Zanlin Qiu, Cheng-han Li, Joerg R Jinschek, Pelagia-Irene (Perena) Gouma
On-Site Speaker (Planned) Zanlin Qiu
Abstract Scope Tetragonal hafnia (T-HfO2) has shown great potential in MOSFET applications, because of its high dielectric constant and wide bandgap. However, a temperature of 1500-1800 ℃ and a critical particle size of 4-10 nm is required to stabilize metastable T-HfO2, preventing a stable T-phase at room temperature. Here, a viable route for stabilizing thermodynamically unfavored phases in the HfO2 system is described. Specifically, yttrium(Y)-doped T-HfO2 nanoparticles have been stabilized with a size of ~58nm using mechanochemical processing followed by subsequent annealing. Structural characterization using XRD, Raman spectroscopy and HRTEM imaging revealed the transformation pathway as M-HfO2 →amorphous phase + T-HfO2 seeds → T-HfO2. (Note: the first process occurs during milling and the second process occur during annealing) The stabilization of T-HfO2 is attributed to the grinding effect in the milling process, decreasing the grain size and simultaneously increasing the surface energy into the range stabilizing the tetragonal phase


2d Crystalline Donors and Acceptors: Modulation Doping in Atomically-thin Heterostructures
2D Material and van der Waal Heterostructure Nanoelectromechanical Systems (NEMS)
A Comparative Study of Tantalum Disulfide as Lithium-ion and Potassium-ion Batteries
Bulk Nanostructured Ceramics Research at the US Naval Research Lab
Controlling Grain Growth with Anisotropic Interfacial Energy and Heterogeneous Segregation
Controlling Synthesis of Nanostructures with Nanoscale Phase Diagrams
Design of Nanoparticles from Environmentally Benign Precursors
Effect of Doping Carbon Nanotubes with Group III-V Compounds Using Floating Catalyst Method
Effects of Layer Thickness and Constituent Material on the Wear and Corrosion Resistance of Nanostructured Multilayers
Growth Mechanism Study of Boron Carbide Nanowires
Low Temperature Synthesis of Metastable Tetragonal Yttria Doped Hafnia T-(Y-HfO2) Nanoparticles Through Mechanochemical Processing and Annealing
Mechanism Study of Controlled Growth of Transition Metal Oxide Nanostructures
Mechanisms of Hillock Formation and Nanostructural Self-assembly during Vapor-deposition of Phase-separating Alloy Films
Nanocrystalline Refractory Ceramic Synthesis Using High Char Polymers
Nanotube Consolidations and Metal-PTFE Nanocomposites for Conformable Thermal and Electrical Interfaces
NiO Nanostructure Growth at High Temperature in Water Vapor via In-situ ESEM
P1-31: Layered Metal Monochalcogenides as Electrodes for Electrochemical Energy Storage Applications
P1-32: Low Temperature Synthesis of Solvothermally Grown Ga2O3 Thin Films on FTO Substrates Enabling Various Functional Applications
Polymer-Derived Ceramic Nanocomposites for Applications at High Temperatures and in Harsh Environments
Polymer Derived Ceramics and Composites- From Nanoscale to Bulk Properties
Processing and Mechanical Properties of 3YSZ-Al2O3 Core-Shell Nanocomposite Ceramics
Self-Assembled Periodic Nanostructures of SrSnO3 Using Martensitic Phase Transformations
Single Acid One-pot Process as an Effective Method for Controlled Generation of Coal-derived Graphene Quantum Dots (GQDs)
Sintering, Structure, and Properties of Y2O3-ZrO2-Al2O3 Core-Shell Nanocomposite Ceramics
Supercrystalline Nanocomposites: Boosting and Controlling the Mechanical Behavior of These New Multifunctional Materials
Surface-engineered CeO2 Nanocrystals: Catalysis and Beyond
Surface Oxidation Behavior of FeNi-based Metal Amorphous Nanocomposite (MANC) for High Speed Motor Applications
Thickness-dependent Piezoelectric Property of Two-dimensional Zinc Oxide Nanosheets with Unit Cell Resolution
Ti3C2 MXene-polyvinyl Alcohol Hybrids for Photothermal Self-healing
Tungsten Ditelluride, A Semimetal Transition Metal Dichalcogenide as Active Material for Monovalent-ion Battery Electrodes
Universal Approach towards Metal Chalcogenide Materials from Molecular Building Blocks

Questions about ProgramMaster? Contact