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Meeting MS&T22: Materials Science & Technology
Symposium Engineering Ceramics: Microstructure-Property-Performance Relations and Applications
Presentation Title Influence of Inversion Level of Ti:MgGa2O4 Ceramics on the Optical Absorption
Author(s) Guangran Zhang, Yiquan Wu, Alexander Shemes , Adrian Goldstein
On-Site Speaker (Planned) Guangran Zhang
Abstract Scope Ti-doped transparent MgGa2O4 ceramics, possessing a high inversion level, compare to MgAl2O4, were fabricated by Pulsed Electric Current Sintering at 950 °C under vacuum for 30–90 min. Optical transmission, emission, and electron paramagnetic resonance spectra were recorded. The maximal transmission level was ~70%, for a thickness of ~1 mm, which, while not very high, permitted the observation of the optical absorption bands location and profile. Comparison of the Ti doped MgGa2O4 (high inversion) and MgAl2O4 (low inversion) spinels, spectral characteristics revealed that a significant increase in the inversion level drives Ti3+ cations from octahedral toward tetrahedral sites. Interpretation of the fluorescence spectra suggests Ti4+ cations (mostly hexacoordinated) were accommodated by the host-despite the scarcity of oxygen in the atmosphere during the sintering process.

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

A Simple Constitutive Law for Comminuted Ceramics under Multi-axial Loading
Advanced WC-Al2O3-ZrO2 Composites with Improved Metal-cutting Performance for Super Alloys
Crack-path Formation in SiC/SiC Composites
D-10: Crystal Orientation Dependence of Mechanical Properties of β-Si3N4 Grains in High Thermal Conductive Silicon Nitride Ceramics Measured Using Microcantilever Beam Specimens
D-11: High Energy X-ray Characterization and Modeling of Residual Strain Evolution in a Ceramic-metal Composite
D-9: Characteristics of YSZ-WC Composite Ceramics
Development of Process-Structure-Property-Performance Relationships for the Advancement of Hard Ceramics Employing FAST and HiPIMS
Development of Textured Piezoelectric Ceramics for High-bandwidth Applications
Deviations from Hall-Petch Relationships in Nanocrystalline Ceramics
Effect of Initial α-phase Content on Mechanical, Thermal, and Electrical Properties of Pressureless Sintered SiC Ceramics
Electrochemical Fabrication of Microstructure Engineered, Highly textured, Ultra-thick Ceramic Oxide Films for High Volumetric Energy Density Electrochemical Energy Storage
Fabrication of Porous Silica with Controllable Porosity via Freeze Casting
Influence of Inversion Level of Ti:MgGa2O4 Ceramics on the Optical Absorption
Investigation of Local Mechanical Responses in Ceramic Materials Based on In Situ TEM Observations
Manufacturing and Performance of Grain Textured Piezoelectric Ceramics for Acoustic Applications
Mechanical Properties and Fragmentation Mechanisms of Si/SiC Core-shell Nanoparticles
Mechanical Properties of MAX Phases
Modular Piezoceramic/Polymer Composites with Locally Adjustable Piezoelectric Properties
Novel Gel-casting Route for Radially Graded All-ceramic Structures for Microwave Metamaterial Antenna Applications
Refractory Cements and Composites Materials Based on Them in System BaO- AL2O3-SiO2
Role of Electrostatic Potential Energy in Carbon Nanotube Strengthened Cement Paste
The Ball-on-Three-Balls-Test: Improving Accuracy and Simplifying Stress Evaluation
The Effects of Microstructure on the Properties of Reticulated Porous Ceramics
The Role of Micro-Scale Analysis Tools in Industrial Problem Solving
Tin Oxide as a Model System for Sintering without Shrinkage – Monitoring Microstructure Evolution and Elastic Property Changes
Transparent and Fluorescent Rare-earth-doped α-SiAlON Ceramics
Tunable Self-Assembly of 2D Carbide MXenes with Bulk Ultra High Temperature Ceramics

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