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→Conductive Paints and Adhesives
=== Conductive Paints and Adhesives===
Conductive paints are precious metal preparations in liquid or paste form. They contain the metal filler material, fine silver particles as conductive pigments mostly in flake form, a paint compound on artificial resin basis, and an organic solvent ''<xr id="tab:Silver Paints, Conductive Pastes, and Conductive Adhesives"/> (Table 8.3)''. The solvent evaporates during drying in air or by aging at slightly elevated temperatures. This allows the silver particles to connect metallically and form conductive paths ''(Fig. 8.3)''.
Conductive adhesives are used mostly for mechanical bonding with low thermal impact. As the adhesive components high-polymer organic substances such as epoxy resins and mixed polymers are mostly used. They are made electrically filler materials such as flake shaped silver powders (70 – 80 wt%). Silver based conductive adhesives are available as single or two component adhesive systems. Both types are hardening without the application of pressure.
<figtable id="tab:Silver Paints, Conductive Pastes, and Conductive Adhesives">'''Table 8.3: Silver Paints, Conductive Pastes, and Conductive Adhesives'''<table border="1" cellspacing="0" styleclass="border-collapse:collapsetwocolortable"><tr><td><p class="s6">Preparation</p></td><td><p class="s6">Substrate</p></td><td><p class="s6">Application</p></td><td><p class="s6">Drying</p></td><td><p class="s6">Properties</p></td><td><p class="s6">Usage</p></td><td><p class="s6">Area</p></td></tr><tr><td/><td><p class="s6">Material</p></td><td><p class="s6">by</p></td><td><p class="s7">[°C]</p></td><td/><td><p class="s6">Amount</p><p class="s7">[g/100 cm²]</p></td><td><p class="s6">Resistance</p><p class="s7">[<span class="s10">S </span>/m²]</p></td></tr><tr><td><p class="s7">AROMAL 38</p></td><td><p class="s6">glass, plastics</p></td><td><p class="s6">spraying, immersion,</p></td><td><p class="s7">RT,</p><p class="s7">30 min</p></td><td><p class="s6">hard well conducting</p></td><td><p class="s7">0.5 - 2</p></td><td><p class="s7">< 0.1</p></td></tr></table> bild</figtable>
Conductive paints and adhesives have broad applications in electrical and electronic engineering. They are used for example for the contacting of film resistors, mounting of terminal wires, conducting electrostatic electricity, or contacting components at low temperatures.
(silver adhesive AUROMAL K 20) as a function of
the hardening temperature
=== Precious Metal Flakes===