Concept

Vitrocéramique

Publications associées (73)

Effect of thick-film materials on the mechanical integrity of high-strength ceramic substrates

Peter Ryser, Thomas Maeder, Caroline Jacq, Giancarlo Corradini

Recently, high-strength zirconia-toughened alumina (ZTA) ceramic substrates have attracted interest, because they offer much improved mechanical properties over straight alumina, while maintaining advantages such as good thermal conductivity and chemical s ...

2005

Materials compatibility issues in LTCC technology and their effects on structural and electrical properties

Peter Ryser, Thomas Maeder, Hansu Birol

Although LTCC (low temperature co-fired ceramics) technology is an attractive solution for smart-packaging of micro-electronic devices, numerous studies are still underway to overcome the difficulties encountered during processing and application. These di ...

2005

Phase diagram of pseudobinary Pb(Yb1/2Nb1/2)O-3-Pb(Sc1/2Nb1/2)O-3 ceramic solid solution

Nava Setter, Ji Hyun Kim

Crystal structure and dielectric properties of (1-x)Pb(Yb1/2Nb1/2)O-3-xPb(Sc1/2Nb1/2)O-3 (PYN1-xPSNx) (0less than or equal toxless than or equal to0.60) solid solution have been studied, and its pseudobinary phase diagram has been determined. The low-tempe ...

2005

Strength of ceramic substrates for piezoresistive thick-film sensor applications

Peter Ryser, Thomas Maeder, Caroline Jacq, Hansu Birol

Force and pressure sensors based on the piezoresistive properties of thickfilm resistors are widely used due to their reliability, simplicity and lowcost. Recently, the introduction of low-temperature co-fired ceramic(LTCC) substrates has allowed further i ...

2004

Microfabrication d'objets composites fonctionnels en 3D et à haut facteur de forme, par procédés UV-LIGA et microstéréolithographie

Sébastien Jiguet

The present thesis deals with new composite photoresists for the UV-LIGA and microstereolithography microfabrication processes. The aim is to build functional 3D objects, with high aspect ratio. Two projects have been investigated in parallel for each micr ...

EPFL2004

Ceramic microcomponents by microstereolithography

Philippe Renaud, Heinrich Hofmann, Arnaud Bertsch, Sébastien Jiguet

This paper describes new polymer/ceramic photosensitive resins that can be used in the microstereolithography process for manufacturing complex 3D components in composite material. These new resins contain high loads (up to 80 wt.%) of alumina nanoparticle ...

2004

The effect of boundary conditions and sample aspect ratio on apparent d(33) piezoelectric coefficient determined by direct quasistatic method

Nava Setter, Dragan Damjanovic

The effect of boundary conditions (e.g., type of metal contacts) and sample geometry (e.g., sample aspect ratio) on measurements of direct longitudinal d(33) coefficient in piezoelectric ceramics is studied by direct quasistatic method. We show that at sma ...

2004

The interfacial transition zone (ITZ) between cement paste and aggregate in concrete

Karen Scrivener

This paper describes the so called interfacial transition zone - ITZ - in concrete. This is the region of the cement paste around the aggregate particles, which is perturbed by the presence of the aggregate. Its origin lies in the packing of the cement gra ...

2004

New sol-gel route for processing of PMN thin films

Nava Setter, Dragan Damjanovic, Zian Kighelman

Pyrochlore free Pb(Mg1/3Nb2/3)O-3 (PMN) thin films were prepared from mixed-metal precursors solutions using the sol-gel process. Lead acetate [Pb(CH3COO)(2)], magnesium acetate [Mg(CH3COO)(2)] and niobium ethoxide [Nb(C2H5O)5] were used as starting materi ...

2003

Properties of thick-film resistors on dielectric and metal substrates for piezoresistive sensors

Peter Ryser, Claudio Grimaldi, Thomas Maeder

In this paper, the resistive and piezoresistive properties of a commercial resistive composition (Du Pont 2041), often used for strain-gauge applications, are examined on several dielectric compositions, which themselves are deposited onto various ceramic ...

2003

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