Equations of State and Phase Transitions in KH2PO4 and (CH3NHCH2COOH)CaCl2 at High Pressure
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摘要: 在活塞圆筒式p-V关系测量装置上，研究了KH2PO4（KDP）和(CH3NHCH2COOH)CaCl2［Tris-sarcosine calcium chloride（TSCC）］在室温下、4.5 GPa内的p-V关系。实验结果表明：KDP在2.1 GPa左右有一个相变；TSCC在0.8 GPa和3.2 GPa左右各有一个相变。本工作还给出了它们在相变前后的状态方程，以及它们的格临爱森参数0、体积模量B0和B0的压力导数B0'。Abstract: The p-V relationships for KH2PO4 (KDP) and (CH3NHCH2COOH)CaCl2 [trissarcosine calcium chloride (TSCC)] at room temperature and up to 4.5 GPa have been studied using the piston-cylinder type measurement device. The experimental results show that the phase transition in KDP occurs near 2.1 GPa and TSCC undergoes two phase transitions near 0.8 GPa and 3.2 GPa. Their equations of state before and after phase transition, Grneisen parameters 0, bulk moduli B0 and first order pressure derivatives, B0' of B0 are also given.
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Key words:
- equation of state /
- phase transition /
- Grneisen parameter /
- bulk modulus
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