Click here to buy a book, photographic periodic table poster, card deck, or 3D print liquid ice 2008 ebay buying on the images you see here! Very pretty old germanium crystal diode. High purity germanium crystal bars.
For people who think eating germanium is healthy. Description supplied by the source: This is a fractured piece of germanium from a sputtering target that was melted, machined, polished, put into service, and then apparently broken liquid ice 2008 ebay buying use after not too long. The silver-looking material on the back is, in fact, silver in an epoxy matrix.
Depending on the particular process being used, some sputtering systems use the target as an anode, and thus they must be conductive. However, those two only 'infiltrate' and glue metal to metal effectively, so epoxy with dispersed silver particles is generally used for targets made of intrinsic semiconductors like germanium or any number of other uses where indium or liquid metal alloy would be inappropriate for whatever reason.
However, for sputter systems or anything else that will be used in a high vacuum environment, one has to be very careful about what materials are employed, especially with organic glues and gaskets, because many materials liquid ice 2008 ebay buying porous to gases or will outgas themselves at.
Although this is the same purity of material that is used to grow the oft-seen trapezoidal monocrystalline bars of germanium, arc melting is of course much more of a chaotic, disruptive, and impure process, where large crystalline grains are not present to the extent that the purity liquid ice 2008 ebay buying the original melt stock would allow for.
Nevertheless, crystals resembling ice on a window pane are liquid ice 2008 ebay buying on the surface, as I had hoped for when melting it. Liquid ice 2008 ebay buying exactly the To a healthy bare skin This is something meant to be put in your bath water to, I don't know, infuse it with germanium or something. This ingot is part of a batch Max Whitby got from China for use in his company's element sets and to use in the line of museum displays we are building together.
It's a great example of the kind of sample you can get way cheaper if you can buy in bulk from the original suppliers. I chose this sample to represent its element in my Photographic Periodic Table Poster. The sample photograph includes text exactly as it appears in the poster, which you are encouraged to buy a copy of.
I'm not sure what these were made for, but they are rather nice, a bit like single crystal silicon boule slices except made of germanium instead. I got them from a guy I bought a batch of germanium lenses from see above: He thought I would appreciate them, and I do! These are very beautiful, very fancy, and normally very, very expensive germanium lenses used to focus infrared light.
They are completely opaque to visible light, but transmit heat infrared light easily. I bought two on eBay and then, as is my practice, asked the seller if they had any more. He turned out to be very nice and sold me 8 more lenses plus threw in a couple of really nice slabs see below. Most of them have a chip or two around the edges, which may render them less than useful, and certainly reduce their value a great deal, but for my purposes the chips are if anything a good thing, liquid ice 2008 ebay buying they let you see the unique fracture surface similar to broken silicon.
Without the chips these would just be polished blocks of something hard to identify. They were described as having a thorium coating, which if it's there must be very thin since they register only barely above background radiation levels.
Thorium fluoride is used as an anti-reflective coating on infrared lenses, so it wouldn't be surprising if these had such a coating, and it would be very thin. This is a liquid ice 2008 ebay buying little cast ingot with a broken side that lets you see a different kind of surface. It weighs about 40 grams. Unfortunately, due to a screw up in sample counting, I had to put this sample into the beautiful periodic table display that now graces the Julian Science Center at DePauw University.
It's the prototype for a line of museum displays that Max Whitby and I are now building, and being the prototype we made a lot of, um, learning experiences in its construction. One was that the germanium sample that was supposed to go it it was in England at the time, forcing me to take up the slack with this one.
Not to worry, Max is sending me more germanium: He buys it direct from China now. Germanium is opaque to visible light, but transparent to infrared heat. That makes it useful for heat-sensing cameras where it can be used to block visible light and make the camera sensitive only to infrared. Lenses made out of germanium can also focus infrared light, which is neat, but they are very expensive even on eBay.
This is just a flat germanium window, such as you might use to cover liquid ice 2008 ebay buying CCD for example. Antique-style crystal radio kit. Heathkit may be out of business but you can still get old and old-style crystal radio kits from www. I put this one together with my six-year-old: Crystal radios use germanium diodes because they have a lower voltage drop than silicon, and are therefore more sensitive to weak radio signals.
Borden Radio Company Contributor: Silicon and Germanium are available in higher purity grades than virtually any other elements. Silicon in particular can be had in large quantities at reasonable prices, at a purity that exceeds anything else achieved by the hand of man. Germanium is similar, just more expensive. The reason for this is liquid ice 2008 ebay buying that other elements are necessarily more difficult to purify some are, some aren'tit's that there is a huge market demand for hyper-pure silicon and to a lesser extent germanium for the semiconductor industry.
Greg sells lots of very unusual elements on eBay and elsewhere: Check the Source link for details. Sample from the Everest Set. Up until the early 's a company in Russia sold a periodic table collection with element samples. At some point their American distributor sold off the remaining stock to a man who is now selling them on eBay. The samples except gases weigh about 0.
To learn more about the set you can visit my page about element collecting for a general description and information about how to buy one, or you can see photographs of all the samples from the set displayed on my website in a periodic table layout or with bigger pictures in numerical order.
Liquid ice 2008 ebay buying from the RGB Set. The Red Green and Blue company in England sells a very nice element collection in several versions. Max Whitbythe director of the company, very kindly donated a complete set to the periodic table table. To learn more about the set you can visit my page about element collecting for a general description or the company's website which includes many photographs and pricing details. I have two liquid ice 2008 ebay buying of each sample from the set: One taken by me and one liquid ice 2008 ebay buying the company.
You can see photographs of all the samples displayed in a periodic table format: Or you can see both side-by-side with bigger pictures in numerical order. The picture on the left liquid ice 2008 ebay buying taken by me. Here is the company's version there is some variation between sets, so the pictures sometimes show different variations of the samples: Kindly donated by David Franco, who sent many elements after seeing the slashdot discussion.
Liquid ice 2008 ebay buying from the Pend Oreille Mine, which is known for having a particularly high germanium content. Sample of Sphalerite With Siderite. Bismuth germanate crystals like this one are used in scintillation detectors. Description from the source: Perfect example, with brown-orange-reddish cristalline masses.
Photo Card Deck of the Elements. In late I published a photo periodic table and it's been selling well enough to encourage me to make new products. This one is a particularly neat one: A complete card deck of the elements with one big five-inch If you like this site and all the pictures on it, you'll love this card deck.
Liquid ice 2008 ebay buying of course if you're wondering what pays for all the pictures and the internet bandwidth to let you look at them, the answer is people buying my posters and cards decks. This is a small crystal of gallium-germanium semiconductor liquid ice 2008 ebay buying pulled by the Czochralski process. I'm not sure why such this sample wasn't made into devices. SoCal NevadaInc Contributor: The bubbles on the surface are a defect that may explain why this sample ended up in the surplus market.
Sphalerite from Jensan Set. Visit my page about element collecting for a general description, or see photographs of all the samples from the set in a periodic table layout or with bigger pictures in numerical order.
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