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  Pejo Marijić created a new knowledge: Ytterbium (en)

  Ytterbium (en)

  Ytterbium is a chemical element with symbol Yb and atomic number 70. It is the fourteenth and penultimate element in the lanthanide series, which is the basis of the relative stability of its +2 oxidation state. However, like the other lanthanides, its mo...  moreYtterbium is a chemical element with symbol Yb and atomic number 70. It is the fourteenth and penultimate element in the lanthanide series, which is the basis of the relative stability of its +2 oxidation state. However, like the other lanthanides, its most common oxidation state is +3, as in its oxide, halides, and other compounds. In aqueous solution, like compounds of other late lanthanides, soluble ytterbium compounds form complexes with nine water molecules. Because of its closed-shell electron configuration, its density and melting and boiling points differ from those of the other lanthanides.
  In 1878, the Swiss chemist Jean Charles Galissard de Marignac separated from the rare earth "erbia" another independent component, which he called "ytterbia", for Ytterby, the village in Sweden near where he found the new component of erbium. He suspected that ytterbia was a compound of a new element that he called "ytterbium" (in total, four elements were named after the village, the others being yttrium, terbium an...    less

  • 24 minutes ago
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  Drazen Vorih → PARTcloud.net Weekly Challenge 2017: Here you can find everything you want to know regarding the topic "Machine design", like motion control or industrial automation. It also has available free e-books! ht...  moreHere you can find everything you want to know regarding the topic "Machine design", like motion control or industrial automation. It also has available free e-books! http://www.machinedesign.com/  

  

  Machine Design

  Machine Design serves innovators in mechanical design, design engineers and managers in OEM, processing, and R&D with technical content that is deep, serious and complete.

  • 31 minutes ago

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    Dalibor Pejicic Great tip, thank you Drazen!

    • 25 minutes ago
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  Pejo Marijić created a new knowledge: Erbium (en)

  Erbium (en)

  Erbium is a chemical element with symbol Er and atomic number 68. A silvery-white solid metal when artificially isolated, natural erbium is always found in chemical combination with other elements. It is a lanthanide, a rare earth element, originally foun...  moreErbium is a chemical element with symbol Er and atomic number 68. A silvery-white solid metal when artificially isolated, natural erbium is always found in chemical combination with other elements. It is a lanthanide, a rare earth element, originally found in the gadolinite mine in Ytterby in Sweden, from which it got its name.
  Erbium's principal uses involve its pink-colored Er3+ ions, which have optical fluorescent properties particularly useful in certain laser applications. Erbium-doped glasses or crystals can be used as optical amplification media, where Er3+ ions are optically pumped at around 980 or 1480 nm and then radiate light at 1530 nm in stimulated emission. This process results in an unusually mechanically simple laser optical amplifier for signals transmitted by fiber optics. The 1550 nm wavelength is especially important for optical communications because standard single mode optical fibers have minimal loss at this particular wavelength.
  In addition to optical fiber amplifier-lasers, a large var...    less

  • 35 minutes ago
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  Petra Baumann pin onto 3D CAD MODELS @ Petra Baumann:

  

  3D CAD MODELS- Parker - SV EO - Bulkhead male connector

  EN: Parker - SV EO - Bulkhead male connector
  DE: Parker - SV EO - Gerader Schottstutzen

  • 36 minutes ago
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  Pejo Marijić created a new knowledge: Holmium (en)

  Holmium (en)

  Holmium is a chemical element with symbol Ho and atomic number 67. Part of the lanthanide series, holmium is a rare earth element. Holmium was discovered by Swedish chemist Per Theodor Cleve. Its oxide was first isolated from rare earth ores in 1878. The ...  moreHolmium is a chemical element with symbol Ho and atomic number 67. Part of the lanthanide series, holmium is a rare earth element. Holmium was discovered by Swedish chemist Per Theodor Cleve. Its oxide was first isolated from rare earth ores in 1878. The element's name comes from Holmia, the Latin name for the city of Stockholm.
  Elemental holmium is a relatively soft and malleable silvery-white metal. It is too reactive to be found uncombined in nature, but when isolated, is relatively stable in dry air at room temperature. However, it reacts with water and corrodes readily, and will also burn in air when heated.
  Holmium is found in the minerals monazite and gadolinite, and is usually commercially extracted from monazite using ion exchange techniques. Its compounds in nature, and in nearly all of its laboratory chemistry, are trivalently oxidized, containing Ho(III) ions. Trivalent holmium ions have fluorescent properties similar to many other rare earth ions (while yielding their own set of unique emission ligh...    less

  • 39 minutes ago
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  Dalibor Pejicic → 3D Printed Projects: Custom designed and printed cookie cutter for our local kayak/canu club.

  

  • 40 minutes ago

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    Dalibor Pejicic

    

    Cookies done!
    

    • 40 minutes ago
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    Drazen Vorih Very good idea!

    • 37 minutes ago
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    Jürgen Heimbach very creative

    • 5 minutes ago
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  Pejo Marijić created a new knowledge: Dysprosium (en)

  Dysprosium (en)

  Dysprosium is a chemical element with symbol Dy and atomic number 66. It is a rare earth element with a metallic silver luster. Dysprosium is never found in nature as a free element, though it is found in various minerals, such as xenotime. Naturally occu...  moreDysprosium is a chemical element with symbol Dy and atomic number 66. It is a rare earth element with a metallic silver luster. Dysprosium is never found in nature as a free element, though it is found in various minerals, such as xenotime. Naturally occurring dysprosium is composed of seven isotopes, the most abundant of which is 164Dy.
  Dysprosium was first identified in 1886 by Paul Émile Lecoq de Boisbaudran, but it was not isolated in pure form until the development of ion exchange techniques in the 1950s. Dysprosium has relatively few applications where it cannot be replaced by other chemical elements. It is used for its high thermal neutron absorption cross-section in making control rods in nuclear reactors, for its high magnetic susceptibility in data storage applications, and as a component of Terfenol-D (a magnetostrictive material). Soluble dysprosium salts are mildly toxic, while the insoluble salts are considered non-toxic.  less

  • 50 minutes ago
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  Pejo Marijić created a new knowledge: Terbium (en)

  Terbium (en)

  Terbium is a chemical element with symbol Tb and atomic number 65. It is a silvery-white, rare earth metal that is malleable, ductile, and soft enough to be cut with a knife. The ninth member of the lanthanide series, terbium is a fairly electropositive m...  moreTerbium is a chemical element with symbol Tb and atomic number 65. It is a silvery-white, rare earth metal that is malleable, ductile, and soft enough to be cut with a knife. The ninth member of the lanthanide series, terbium is a fairly electropositive metal that reacts with water, evolving hydrogen gas. Terbium is never found in nature as a free element, but it is contained in many minerals, including cerite, gadolinite, monazite, xenotime, and euxenite.
  Swedish chemist Carl Gustaf Mosander discovered terbium as a separate elemental compound in 1843. He detected it as an impurity in yttrium oxide, Y2O3. Yttrium and terbium are named after the village of Ytterby in Sweden. Terbium was not isolated in pure form until the advent of ion exchange techniques.
  Terbium is used to dope calcium fluoride, calcium tungstate and strontium molybdate, materials that are used in solid-state devices, and as a crystal stabilizer of fuel cells which operate at elevated temperatures. As a component of Terfenol-D (an alloy that ex...    less

  • 53 minutes ago
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  Beyond PLM wrote a recent NEWS entry:

  

  (EN) Enterprise cloud PLM is getting one step closer

  When you present about “cloud” and “PLM” topic, the question of security was always the one on the top.For many years, it was such a nice way for IT to steer the conversation in the wrong direction. The tone and argument have cha...

  • 1 hour ago
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  Presseservice CANVAS wrote a recent NEWS entry:

  

  (DE) Jetzt gleitend oder rollend verfahren – E4.1 Baukasten von igus nochmals erweitert

  Neue Rollen-Kettenglieder reduzieren Geräusche und Vibrationen bei gleichzeitig weniger benötigter Antriebsenergie
  
  Der motion plastics Spezialist igus hat den Standard-Baukasten der Energiekettenserie E4.1 um neue Rollen-Kettenglieder erweite...

  • 1 hour ago
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  Presseservice CANVAS → Young Engineers powered by JFG & CADENAS:

  

  Formula Student Racing Teams 2017 sponsored by KVT-Fastening - Blog View - 3D CAD Models

  Manufacturer 3D CAD Models & BIM Objects Free Download News & Blogs from PARTcommunity - The Free 2D & 3D CAD Models Download Portal and Social Community for Engineers Sicher verbunden auf den Rennstrecken unterwegs
  
  Auch in diesem Jahr hat KVT-Fastenin

  • 1 hour ago
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  Presseservice CANVAS → norelem Race Camp 2016 :

  

  Formula Student Racing Teams 2017 sponsored by KVT-Fastening - Blog View - 3D CAD Models

  Manufacturer 3D CAD Models & BIM Objects Free Download News & Blogs from PARTcommunity - The Free 2D & 3D CAD Models Download Portal and Social Community for Engineers Sicher verbunden auf den Rennstrecken unterwegs
  
  Auch in diesem Jahr hat KVT-Fastenin

  • 1 hour ago

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  Presseservice CANVAS wrote a recent NEWS entry:

  

  (DE) Formula Student Racing Teams 2017 sponsored by KVT-Fastening

  Sicher verbunden auf den Rennstrecken unterwegs
  
  Auch in diesem Jahr hat KVT-Fastening bundesweit zahlreiche Formula Student Racing Teams mit einem Sponsoring in Form von Verbindungselementen und Know-how-Transfer unterstützt. Befestiger der Marken...

  • 1 hour ago
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  Hendrik Uhlmann pin onto 3D CAD MODELS @ Hendrik Uhlmann:

  

  3D CAD MODELS- WAGO - 2016-1201 - 2-CONDUCTOR THROUGH TERMINAL BLOCK SUITABLE FOR EX E APPLICATIONS CENTRE-/ LATERAL MARKING

  EN: WAGO - 2016-1201 - 2-CONDUCTOR THROUGH TERMINAL BLOCK SUITABLE FOR EX E APPLICATIONS CENTRE-/ LATERAL MARKING
  DE: WAGO - 2016-1201 - 2-Leiter-Durchgangsklemme für Ex e II-Anwendungen geeignet Mitten- / Seitliche Beschriftung
  FR: WAGO - 2016-12...  moreEN: WAGO - 2016-1201 - 2-CONDUCTOR THROUGH TERMINAL BLOCK SUITABLE FOR EX E APPLICATIONS CENTRE-/ LATERAL MARKING
  DE: WAGO - 2016-1201 - 2-Leiter-Durchgangsklemme für Ex e II-Anwendungen geeignet Mitten- / Seitliche Beschriftung
  FR: WAGO - 2016-1201 - Borne de passage pour 2 conducteurs pour applications Ex e Marquage central/latéral
  IT: WAGO - 2016-1201 - morsetto passante per 2 conduttori per applicazioni Ex e marcatura centrale/laterale
  ES: WAGO - 2016-1201 - Borna de paso, 2 conductores apropiado hasta aplicaciones Ex e Marcaje central / lateral  less

  • 2 hours ago
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  Davide Endeman
  

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