The µ-value (“mu-value”) of a material is also known as its “water vapour resistance factor”. It is a measure of the material's relative reluctance to let water vapour pass through, and is measured in comparison to the properties of air.
Micro (Greek letter μ (U+03BC) or the legacy symbol µ (U+00B5)) is a unit prefix in the metric system denoting a factor of 10−6 (one millionth). Confirmed in 1960, the prefix comes from the Greek μικρός (mikrós), meaning "small".
Using an Alt keyboard shortcut to insert the Mu or Micro symbol. You can press the Alt key in combination with numbers on the numeric keypad to insert the Mu or Micro symbol in two ways: Press Alt + 230. Press Alt + 0181.
You can press the Alt key in combination with numbers on the numeric keypad to insert the Mu or Micro symbol in two ways:Press Alt + 230.Press Alt + 0181.2 Nov 2021
There are many materials that can withstand these temperatures: from metals such as (nickel alloys, iron alloys, tungsten and molybdenum alloys, even though these two might have oxidation issues, iridium, osmium, titanium, etc) to ceramics (silicon nitride, aluminum oxide, mullite, zirconia, etc).
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