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  2. Flux method - Wikipedia

    en.wikipedia.org/wiki/Flux_method

    The flux is molten in a highly stable crucible that does not react with the flux. Metal crucibles, such as platinum , titanium , and niobium are used for the growth of oxide crystals. Ceramic crucibles, such as alumina , zirconia , and boron nitride are used for the growth of metallic crystals. [ 2 ]

  3. Superhard material - Wikipedia

    en.wikipedia.org/wiki/Superhard_material

    An example synthesis of this material is the flux method, which is conducted by placing rhenium metal and amorphous boron in an alumina crucible with excess aluminium. This can be run with a ratio of 1:2:50 for Re:B:Al, with the excess aluminium as a growth medium.

  4. Activated alumina - Wikipedia

    en.wikipedia.org/wiki/Activated_alumina

    Activated alumina is manufactured from aluminium hydroxide by dehydroxylating it in a way that produces a highly porous material; this material can have a surface area significantly over 200 m 2 /g. The compound is used as a desiccant (to keep things dry by adsorbing water from the air) and as a filter of fluoride , arsenic and selenium in ...

  5. Loss on ignition - Wikipedia

    en.wikipedia.org/wiki/Loss_on_ignition

    Weigh the empty crucible that the sample is to be placed in and record its weight in a lab book. Place the sample in the empty crucible and weigh the crucible again with the sample in it. The new weight minus the empty crucible weight is the sample's wet weight. Place the sample in the drying oven or blast furnace as required.

  6. Crucible - Wikipedia

    en.wikipedia.org/wiki/Crucible

    A modern crucible used in the production of silicon ingots via the Czochralski process Smaller clay graphite crucibles for copper alloy melting. A crucible is a container in which metals or other substances may be melted or subjected to very high temperatures.

  7. Crucible tongs - Wikipedia

    en.wikipedia.org/wiki/Crucible_tongs

    Since crucible tongs work with the crucible, one must know the safety procedures of the crucible. Before using the crucible, make sure that it is dry; Fill the crucible with sample chemicals to only 1/2 or 2/3, do not fill until it is full; If the user used the crucible to fuse the glass, waiting for the crucible to cool down before cleaning it

  8. Kids worked overnight shifts at pork processing plant, feds find

    www.aol.com/kids-worked-overnight-shifts-pork...

    Federal investigators found nearly a dozen children to be working dangerous, overnight shifts at Seaboard Triumph Foods' pork processing plant in Sioux City, Iowa, the Department of Labor announced.

  9. Aluminothermic reaction - Wikipedia

    en.wikipedia.org/wiki/Aluminothermic_reaction

    The oxide was heated with aluminium in a crucible in a furnace. The runaway reaction made it possible to produce only small quantities of material. Hans Goldschmidt improved the aluminothermic process between 1893 and 1898, by igniting the mixture of fine metal oxide and aluminium powder by a starter reaction without heating the mixture externally.