产品名称：Beryllium Planchets

Chemically, mica is a complex hydrous silicate of aluminum, containing potassium, magnesium, iron, sodium fluoride and/or lithium and traces of other elements. It is stable and inert to water, acids (except hydrofluoric and concentrated sulfuric acids), alkalis, conventional solvents and oil.
Our mica has minimum inclusions, minimum air and bubbles and is clean. ASTM D-351 describes grading standards for mica.
See this link for Properties and chemical composition of Mica Grade V1

Early references to this technique include Professors Dan Pease, C.E. Hall and Robert Bils
Bils R.F., Hall C.E., 1962. Biology, 17, 123-130
Pease D.C., 1964. Histological techniques for electron microscopy, 2nd ed, pp 208-209, (Academic Press)
Hall C.E., 1966. Introduction to electron microscopy, 2nd ed, (McGraw Hill)

Beryllium offers an ideal background for X-ray analysis and backscattered electron imaging using a SEM or microprobe analyzer. The low atomic number of Beryllium (4) and the high purity of the planchets virtually eliminates characteristic X-ray peaks will give a low background radiation. 
The planchets are made of Beryllium with a 99% or better purity and any of the possible impurities will not exceed 0.08% . In fact most of the possible impurities are well below 0.01%. Using proper cleaning and safety procedures the planchets can be used again. Available in three sizes to fit the most widely used specimen mounts. Surface finish is smooth: 1.6µm or less and is perfectly suitable for many applications.

Warning: Cleaning and handling of Beryllium must be done in such a way that it does not generate particulates which are toxic when inhaled. 
  

Prod #	Description	Unit

1655

Beryllium Planchet, 10mm dia., 0.25mm thick

each

1655-B

Beryllium Planchet, 12.7mm dia., 0.25mm thick

each

1656

Beryllium Planchet, 25.4mm dia., , 0.25mm thick

each