THE IMPROVED MURNAGHAN EQUATION |
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| Authors: | MA Dong-ping ZMENG Xi-te ZHANG Zheng-gang XU Yi-sun LI Gu-bo |
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| Affiliation: | 1. Department of Physics, Chengdu University of Science and Technology, Chengdu, China;2. Chengdu College of Geology, Chenqdu, China;3. Sichuan Institute of Technology, chengdu, China |
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| Abstract: | The improved Murnaghan equation is derived by integrating B(P)=-v(∂p/∂v)T=B0(1)(P)·P and expanding B(1)(P) and simllar function in series of (1-K) , where K is the compression ratio (K≡(v/v0)1/3. The new equation obtained is compared with Murnagnan equation, Keane equation and Birch equation.It is found that, the improved Murnaghan equation has better convergency in comparison with the Birch equation. The characteristics of the new equation and the reasons of its better convergency are discussed. |
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