Title: The use of ultrasonic measurements under modest pressure to estimate compression at high pressure
Abstract: The variation of sound velocities with pressure can be measured by ultrasonic techniques with great precision, but the pressure range is limited. It is shown how such measurements can be used to estimate the volume dependence on pressure, or compression VV0, at pressures one or two orders of magnitude higher than the pressure of the velocity measurements. A formula for the compression is presented which is based upon the assumption that the bulk modulus is linear with pressure. The parameters of this formula are evaluated with acoustic data so that there are no arbitrary constants or ‘curve-fitting’. The compression formula is compared with polynomial approximations to it and with an equation due to Birch. The compression is evaluated for 14 compounds including compressible materials like K, incompressible materials like Al2O3, and hexagonal metals like Cd. The agreement between the formula and experimental compression data is satisfactory to 100 or 200 kbar, and in several cases to over 1000 kbar.
Publication Year: 1966
Publication Date: 1966-03-01
Language: en
Type: article
Indexed In: ['crossref']
Access and Citation
Cited By Count: 461
AI Researcher Chatbot
Get quick answers to your questions about the article from our AI researcher chatbot