different properties as shown in Tables <xr id="tab:DifferentTypesofSilverPowders" /> 8.1 and 2.12. Atomizing from a melt results in a powder with high tap density composed of spherical particles. Using electrolytic deposition from a silver salt solution creates randomly shaped dentritic to crystalline particle structures. Chemical processes can result in rather fine particles with a large specific surface area. Fig. 8.1 shows typical SEM photo-graphs of atomized silver powder in spherical shapes (a) and a cementation powder composed of rounded crystal agglomerates (b).

<figtable id="tab:DifferentTypesofSilverPowders"><table border="1" cellspacing="0" style="border-collapse:collapse" value="<caption>Different Types of Silver Powders</caption>"><tr><td><p class="s6">Powder type</p></td><td><p class="s6">GE</p></td><td><p class="s6">GN1</p></td><td><p class="s7">ES</p></td><td><p class="s6">V</p></td></tr><tr><td><p class="s6">Manufacturing Process</p></td><td><p class="s6">chemical</p></td><td><p class="s6">chemical</p></td><td><p class="s7">electrolytic</p></td><td><p class="s6">atomized</p></td></tr><tr><td><p class="s6">Particle shape</p></td><td><p class="s6">agglomerated</p></td><td><p class="s6">agglomerated</p></td><td><p class="s7">dentritic</p></td><td><p class="s6">spherical</p></td></tr><tr><td><p class="s6">Avg. particle diameter</p><p class="s6">(median) [µm]</p></td><td><p class="s6">10 - 15</p></td><td><p class="s6">20 - 40</p></td><td><p class="s7">-</p></td><td><p class="s6">32 - 60</p></td></tr><tr><td><p class="s6">Medium particle size</p><p class="s6">(FSS - Fisher Sub Sieve Size) [µm]</p></td><td><p class="s6">-</p></td><td><p class="s6">-</p></td><td><p class="s7">4.0 - 6.0</p></td><td><p class="s6">-</p></td></tr><tr><td><p class="s6">Tap density</p><p class="s6">(DIN/ISO 3953) [g/cm<span class="s8">3</span>]</p></td><td><p class="s6">0.7 - 1.1</p></td><td><p class="s6">2.0 - 2.5</p></td><td><p class="s7">2.0 - 3.0</p></td><td><p class="s6">4.0 - 6.7</p></td></tr><tr><td><p class="s6">Specific surface area</p><p class="s6">(B.E.T.) [m<span class="s8">2</span>/g]</p></td><td><p class="s6">0.5 - 0.9</p></td><td><p class="s6">-</p></td><td><p class="s7">-</p></td><td><p class="s6">-</p></td></tr></table></figtable>