| 翻訳と辞書 |
Highly Oriented Pyrolytic Graphite
Highly oriented pyrolytic graphite (HOPG) is a highly pure and ordered form of synthetic graphite. It is characterised by a low mosaic spread angle, meaning that the individual graphite crystallites are well aligned with each other. The best HOPG samples have mosaic spreads of less than 1 degree. It is used in and x-ray optics as a monochromator and in scanning probe microscopy as a substrate and for magnification calibration.
Note that the term “highly ''ordered'' pyrolytic graphite” is sometimes used for this material, but IUPAC favors “highly ''oriented''”
== Synthesis ==
The method used to produce HOPG is based on the process used to make pyrolytic graphite, but with additional tensile stress in the basal plane direction. This produces improved alignment of the graphite crystallites, and an interplanar spacing close to that observed in natural graphite. The “stress recrystallization” of graphite was first described by L.C.F. Blackman and Alfred Ubbelohde in 1962
The diameters of the individual crystallites in HOPG are typically in the range 1 – 10 μm
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
■ウィキペディアで「Highly Oriented Pyrolytic Graphite」の詳細全文を読む
スポンサード リンク
| 翻訳と辞書 : 翻訳のためのインターネットリソース |
Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.
|
|