Adaption of Functional Ceramic Materials for the Laser Sintering Process in Integrated Sensor Applications

2016 ◽  
Vol 2016 (CICMT) ◽  
pp. 000011-000017
Author(s):  
Rena Gradmann ◽  
Thomas Seuthe ◽  
Christian Vedder ◽  
Markus Eberstein ◽  
Uwe Partsch
Keyword(s):  
Functional Materials ◽  
Ceramic Materials ◽  
Laser Sintering ◽  
Temperature Sensitive ◽  
Integrated Sensor ◽  
Sensor Applications ◽  
Material Optimization ◽  
Furnace Sintering ◽  
Application Requirements ◽  
Functional Ceramic

Abstract The ceramic thick-film technology allows the build-up of miniaturised and robust integrated multilayer-circuits and sensors by means of sequential screen-printing and firing of different functional materials. However, the manufacturing of integrated electronics does not succeed if the components are temperature sensitive or too large for the process in a sintering furnace. At present, large components like wind power rotors, axles or roller bearings are monitored by vulnerable hybrid sensor systems. In order to implement the advantages of integrated devices, like the direct surface contact and the high thermomechanical stability, functional ceramic-based materials are adapted or newly developed to accommodate the needs of laser sintering techniques of printed sensor layers on structural components. In a first approach, screen printed thick films on steel components are investigated. The defect-free densification of functional layers crucially depends on the particular material composition in combination with adapted laser treatment. A first generation of functional layers is presented, comprising isolating, conductive, and resistive electrical materials. The films are tested in demonstrator setups and show functional properties comparable to those of the furnace sintering technology. Future aspects of material optimization and the adaption to specific application requirements will be discussed.

Adaption of Functional Ceramic Materials for the Laser Sintering Process in Integrated Sensor Applications

2016 ◽  
Vol 13 (4) ◽  
pp. 176-181
Author(s):  
Rena Gradmann ◽  
Thomas Seuthe ◽  
Christian Vedder ◽  
Markus Eberstein ◽  
Uwe Partsch
Keyword(s):  
Functional Materials ◽  
Ceramic Materials ◽  
Laser Sintering ◽  
Temperature Sensitive ◽  
Integrated Sensor ◽  
Sensor Applications ◽  
Material Optimization ◽  
Furnace Sintering ◽  
Application Requirements ◽  
Functional Ceramic

The ceramic thick film technology allows the buildup of miniaturized and robust integrated multilayer circuits and sensors by means of sequential screen printing and firing of different functional materials. However, the manufacturing of integrated electronics does not succeed if the components are temperature sensitive or too large for the process in a sintering furnace. At present, large components like wind power rotors, axles, or roller bearings are monitored by vulnerable hybrid sensor systems. To implement the advantages of integrated devices, such as the direct surface contact and the high thermomechanical stability, functional ceramic-based materials are adapted or newly developed to accommodate the requirements of laser sintering techniques of printed sensor layers on structural components. In a first approach, first screen-printed thick films on steel components are investigated. The defect-free densification of functional layers crucially depends on the particular material composition and adapted laser treatment. A first generation of functional layers is presented, comprising insulating, conductive, and resistive electrical materials. The films are tested in demonstrator setups and show functional properties comparable with those of the furnace sintering technology. Herein, future aspects of material optimization and the adaption to specific application requirements are discussed.

scholarly journals Electrospinning Nanoparticles-Based Materials Interfaces for Sensor Applications

Sensors ◽  
2019 ◽  
Vol 19 (18) ◽  
pp. 3977 ◽  
Author(s):  
Zhang ◽  
Jia ◽  
Liu ◽  
Wei ◽  
Su
Keyword(s):  
High Performance ◽  
Environmental Science ◽  
Materials Science ◽  
Functional Materials ◽  
Label Free ◽  
Structure Property ◽  
Metallic Oxide ◽  
Electrospinning Technique ◽  
Sensor Applications ◽  
Surface Enhanced Raman

Electrospinning is a facile technique to fabricate nanofibrous materials with adjustable structure, property, and functions. Electrospun materials have exhibited wide applications in the fields of materials science, biomedicine, tissue engineering, energy storage, environmental science, sensing, and others. In this review, we present recent advance in the fabrication of nanoparticles (NPs)-based materials interfaces through electrospinning technique and their applications for high-performance sensors. To achieve this aim, first the strategies for fabricating various materials interfaces through electrospinning NPs, such as metallic, oxide, alloy/metal oxide, and carbon NPs, are demonstrated and discussed, and then the sensor applications of the fabricated NPs-based materials interfaces in electrochemical, electric, fluorescent, colorimetric, surface-enhanced Raman scattering, photoelectric, and chemoresistance-based sensing and detection are presented and discussed in detail. We believe that this study will be helpful for readers to understand the fabrication of functional materials interfaces by electrospinning, and at the same time will promote the design and fabrication of electrospun nano/micro-devices for wider applications in bioanalysis and label-free sensors.

Fabrication of Bioactive Glass-Ceramics by Selective Laser Sintering

2006 ◽  
Vol 309-311 ◽  
pp. 289-292
Author(s):  
Ruth D. Goodridge ◽  
Chikara Ohtsuki ◽  
Masanobu Kamitakahara ◽  
David J. Wood ◽  
Kenny W. Dalgarno
Keyword(s):  
Glass Ceramic ◽  
Selective Laser Sintering ◽  
Glass Ceramics ◽  
Ceramic Materials ◽  
Laser Sintering ◽  
Layer Manufacturing ◽  
Custom Made ◽  
Good Potential

The feasibility of processing glass-ceramics using the layer manufacturing technique, selective laser sintering (SLS), to produce parts with suitable biological and mechanical properties for use in bone replacement applications, has been investigated. Glass-ceramics derived from glasses based on several different systems have been considered. Initial experiments using an apatite-mullite glass-ceramic (4.5SiO2⋅3Al203⋅1.6P2O5⋅3CaO⋅2CaF2) demonstrated the ability to process glass-ceramic materials using this technique, creating parts with a strength similar to that of cancellous bone, and a porous structure that was shown in vivo to be suitable for the ingrowth of bone. Concerns over the inability of the apatite-mullite material to form an apatite layer on its surface when soaked in a simulated body fluid (SBF) has led to the development of Al2O3-free glasses based on the systems (50-x)CaO⋅45SiO2⋅5P2O5⋅xCaF2 and (48-x)CaO⋅45SiO2⋅5P2O5⋅2CaF2⋅xNa2O. These materials have demonstrated good in vitro bioactivity, and therefore have good potential as candidates for processing by an indirect SLS method for the production of custom-made bone implants.

scholarly journals Shaping ceramics through indirect selective laser sintering

2016 ◽  
Vol 22 (3) ◽  
pp. 544-558 ◽  
Author(s):  
Jan Patrick Deckers ◽  
Khuram Shahzad ◽  
Ludwig Cardon ◽  
Marleen Rombouts ◽  
Jozef Vleugels ◽  
...  
Keyword(s):  
Design Methodology ◽  
Dispersion Polymerization ◽  
Selective Laser Sintering ◽  
Laser Sintering ◽  
Powder Synthesis ◽  
Composite Powders ◽  
Content Type ◽  
Production Methods ◽  
Nylon 12 ◽  
Furnace Sintering

Purpose The purpose of this paper is to compare different powder metallurgy (PM) processes to produce ceramic parts through additive manufacturing (AM). This creates the potential to rapidly shape ceramic parts with an almost unlimited shape freedom. In this paper, alumina (Al2O3) parts are produced, as Al2O3 is currently the most commonly used ceramic material for technical applications. Design/methodology/approach Variants of the following PM route, with indirect selective laser sintering (indirect SLS) as the AM shaping step, are explored to produce ceramic parts: powder synthesis, indirect SLS, binder removal and furnace sintering and alternative densification steps. Findings Freeform-shaped Al2O3 parts with densities up to approximately 90 per cent are obtained. Research limitations/implications The resulting Al2O3 parts contain inter-agglomerate pores. To produce higher-quality ceramic parts through indirect SLS, these pores should be avoided or eliminated. Originality/value The research is innovative in many ways. First, composite powders are produced using different powder production methods, such as temperature-induced phase separation and dispersion polymerization. Second, four different binder materials are investigated: polyamide (nylon-12), polystyrene, polypropylene and a carnauba wax – low-density polyethylene combination. Further, to produce ceramic parts with increased density, the following densification techniques are investigated as additional steps of the PM process: laser remelting, isostatic pressing and infiltration.

Ceramic Materials for Mass-Sensitive Sensors - Detection of VOCs and Monitoring Oil Degradation

2006 ◽  
Vol 45 ◽  
pp. 1799-1802 ◽  
Author(s):  
Peter A. Lieberzeit ◽  
Gerd Glanznig ◽  
Anton Leidl ◽  
Franz L. Dickert
Keyword(s):  
Chemical Sensor ◽  
Sol Gel ◽  
Ceramic Materials ◽  
Oil Degradation ◽  
Phase Measurements ◽  
Sensor Applications ◽  
Enhanced Sensitivity ◽  
Wave Oscillator ◽  
Quartz Substrates ◽  
Micro Balance

Inorganic frameworks obtained by the sol-gel route can be templated by a molecular imprinting (MIP) approach to generate functional cavities. Such MIP ceramics show highly appreaciable properties for chemical sensor applications, because they are inherently chemically and thermally robust. In combination with mass-sensitive devices (e.g. quartz crystal micro balance – QCM, surface transverse wave oscillator - STW), they yield highly selective and sensitive chemical sensors. Gas phase measurements with volatile organic compounds (VOCs) e.g. lead to sensitivities below 1 ppm. Sensitivity can be tuned by the sol-gel-precursor: when hydrolysing more bulky alkoxides, this leads to enhanced sensitivity by increasing porosity as a consequence of slower solvent evaporation. By adding products of oxidative oil degradation to the sol-gel mixture, we succeeded in generating sensors for degradation processes in these complex matrices. This allows parallelly monitoring both the chemical state of oil and changes in viscosity. Sensitivity is enhanced according to the Sauerbrey equation by going from 10 MHz QCM transducers to higher frequencies either by etching the quartz substrates and so reducing the resonator thickness or by applying STWs.

Functional Ceramic Materials Database:  An Online Resource for Materials Research

2008 ◽  
Vol 48 (2) ◽  
pp. 449-455 ◽  
Author(s):  
D. J. Scott ◽  
S. Manos ◽  
P. V. Coveney ◽  
J. C. H. Rossiny ◽  
S. Fearn ◽  
...  
Keyword(s):  
Ceramic Materials ◽  
Materials Database ◽  
Online Resource ◽  
Materials Research ◽  
Functional Ceramic
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