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--></style></head><body lang=CS link="#0563C1" vlink="#954F72"><div class=WordSection1><p class=MsoNormal>Dobrý den všem,</p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Po včerejším zjištění, že SnPb už nemají v Kauflandu (měli tak před měsícem), jsem se podíval do TME a tam mě zaujalo, že klesl podíl pájek s 63% a skoro všechny tenké měly 60, jako kdysi dávno.</p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Tak jsem začal pátrat, jaká je ta správná koncentrace.</p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Závěr je jasný, 61,9. Jenže se poněkud liší popisy, někde říkají, že je to weight a jinde atomic.</p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Vzhledem k velmi odlišné atomové hmotnosti Sn a Pb (asi 100 vs asi 200), by měl být rozdíl velkej.</p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Tady třeba 2x graf z Researchgate, liší se jen tím wt vs atomic:</p><p class=MsoNormal><a href="https://www.google.com/imgres?imgurl=https%3A%2F%2Fwww.researchgate.net%2Fprofile%2FAndreas_Larsson9%2Fpublication%2F337367336%2Ffigure%2Ffig1%2FAS%3A827045294649345%401574194372825%2FThe-lead-tin-Pb-Sn-phase-diagram-with-three-different-solder-compositions-marked-out.png&imgrefurl=https%3A%2F%2Fwww.researchgate.net%2Ffigure%2FThe-lead-tin-Pb-Sn-phase-diagram-with-three-different-solder-compositions-marked-out_fig1_337367336&tbnid=IcigeFHhZMi1mM&vet=12ahUKEwipm8Gtw6zsAhUBuKQKHZCAADMQMygDegUIARCXAQ..i&docid=T-XikBwzhE40CM&w=850&h=623&q=sn%20pb%20melting%20point%20graph&ved=2ahUKEwipm8Gtw6zsAhUBuKQKHZCAADMQMygDegUIARCXAQ">https://www.google.com/imgres?imgurl=https%3A%2F%2Fwww.researchgate.net%2Fprofile%2FAndreas_Larsson9%2Fpublication%2F337367336%2Ffigure%2Ffig1%2FAS%3A827045294649345%401574194372825%2FThe-lead-tin-Pb-Sn-phase-diagram-with-three-different-solder-compositions-marked-out.png&imgrefurl=https%3A%2F%2Fwww.researchgate.net%2Ffigure%2FThe-lead-tin-Pb-Sn-phase-diagram-with-three-different-solder-compositions-marked-out_fig1_337367336&tbnid=IcigeFHhZMi1mM&vet=12ahUKEwipm8Gtw6zsAhUBuKQKHZCAADMQMygDegUIARCXAQ..i&docid=T-XikBwzhE40CM&w=850&h=623&q=sn%20pb%20melting%20point%20graph&ved=2ahUKEwipm8Gtw6zsAhUBuKQKHZCAADMQMygDegUIARCXAQ</a></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><a href="https://www.google.com/imgres?imgurl=https%3A%2F%2Fwww.researchgate.net%2Fprofile%2FFq_Zu%2Fpublication%2F291162603%2Ffigure%2Ffig1%2FAS%3A388523782885381%401469642696825%2FThe-Pb-Sn-phase-diagram.png&imgrefurl=https%3A%2F%2Fwww.researchgate.net%2Ffigure%2FThe-Pb-Sn-phase-diagram_fig1_291162603&tbnid=Q4JlFk3R_MSWgM&vet=12ahUKEwipm8Gtw6zsAhUBuKQKHZCAADMQMygCegUIARCVAQ..i&docid=p8pEkQjcLU7HyM&w=660&h=510&q=sn%20pb%20melting%20point%20graph&ved=2ahUKEwipm8Gtw6zsAhUBuKQKHZCAADMQMygCegUIARCVAQ">https://www.google.com/imgres?imgurl=https%3A%2F%2Fwww.researchgate.net%2Fprofile%2FFq_Zu%2Fpublication%2F291162603%2Ffigure%2Ffig1%2FAS%3A388523782885381%401469642696825%2FThe-Pb-Sn-phase-diagram.png&imgrefurl=https%3A%2F%2Fwww.researchgate.net%2Ffigure%2FThe-Pb-Sn-phase-diagram_fig1_291162603&tbnid=Q4JlFk3R_MSWgM&vet=12ahUKEwipm8Gtw6zsAhUBuKQKHZCAADMQMygCegUIARCVAQ..i&docid=p8pEkQjcLU7HyM&w=660&h=510&q=sn%20pb%20melting%20point%20graph&ved=2ahUKEwipm8Gtw6zsAhUBuKQKHZCAADMQMygCegUIARCVAQ</a></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Víte někdo, jak to je?</p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Díky,</p><p class=MsoNormal>PH</p></div></body></html>