9 research outputs found
The effect of graphene nanoplatelets on the thermal and electrical properties of aluminum nitride ceramics
Get PDFThe thermal conductivity (κ) of AlN (2.9 wt.% of Y_{2}O_{3}) is studied as a function of the addition of multilayer graphene (from 0 to 10 vol.%). The κ values of these composites, fabricated by spark plasma sintering (SPS), are independently analyzed for the two characteristic directions defined by the GNPs orientation within the ceramic matrix; that is to say, perpendicular and parallel to the SPS pressing axis. Conversely to other ceramic/graphene systems, AlN composites experience a reduction of κ with the graphene addition for both orientations; actually the decrease of κ for the in-plane graphene orientation results rather unusual. This behavior is conveniently reproduced when an interface thermal resistance is introduced in effective media thermal conductivity models. Also remarkable is the change in the electrical properties of AlN becoming an electrical conductor (200 S m⁻¹) for graphene contents above 5 vol.%
High energy X-ray diffraction analysis of strain and residual stress in silicon nitride ceramic diffusion bonds
No full textInfluence of Calcination Temperature on the Densification of Refractory Mullite Grains Synthesized from Recycled Materials
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Preparation of porous mullite ceramic for high temperature flue gas filtration application by gel casting method
No full textSynthesis and characterization of mullite–zirconia composites by reaction sintering of zircon flour and sillimanite beach sand
No full textEffects on Phase Evolution of La2O3–ZrO2 Mixed Oxides Prepared Via Sol–Gel Process and its Crystal Growth Behavior
No full textSol–gel derived silica-based organic–inorganic hybrid materials as “composite precursors” for the synthesis of highly homogeneous nanostructured mixed oxides: an overview
No full textStructural and morphological control in the preparation of high surface area zirconia
No full text10.1007/s10563-008-9048-2Catalysis Surveys from Asia123153-16
