Pressure medium and method for using pressure medium
A pressure medium containing at least one Group-14 element-containing organic compound (A) selected from the group consisting of a compound (A1) represented by the general formula (a1) and a compound (A2) represented by the general formula (a2): where each of R a11 , R a12 , R a13 , and R a14 independently represents an alkyl group having 3 to 6 carbon atoms, and Z a1 represents a carbon atom or a silicon atom: where each of R a21 , R a22 , R a23 , and R a24 independently represents an alkyl group having 3 to 6 carbon atoms, and Z a2 represents a silicon atom, a germanium atom, a tin atom, or a lead atom.
1 . A method, comprising:
applying a pressure to a substance via a pressure medium,
the pressure medium comprising:
at least one Group-14 element-containing organic compound of formula (a2):
wherein each of R a21 , R a22 , R a23 , and R a24 is an alkyl group having 3 carbon atoms, and Z a2 is a silicon atom.
2 . The method according to claim 1 , wherein R a21 , R a22 R a23 , and R a24 are each the same alkyl group.
3 . The method according to claim 1 , wherein a solidification pressure at 25° C. of the pressure medium is more than 4.1 GPa.
4 . The method according to claim 1 , wherein a kinematic viscosity at 40° C. of the pressure medium is more than 1.0 mm 2 /s.
5 . The method according to claim 1 , wherein a melting point of the pressure medium is −50° C. or less.
6 . The method according to claim 1 , wherein a flash point of the pressure medium is 70° C. or more.
7 . The method according to claim 1 , wherein a content of the at least one Group-14 element-containing organic compound of formula (a2) is from 70% by mass to 100% by mass based on a total amount of the pressure medium.
8 . The method according to claim 1 , wherein the pressure is more than 4.1 GPa.