Thermodynamic study on elimination of platinum inclusions in phosphate laser glasses for inertial confinement fusion applications  

作　　者：Qinyuan Zhang Lili Hu Zhonghong Jiang 

机构地区：[1]Chinese Acad Sci, Shanghai Inst Opt & Fine Mech, Shanghai 201800, Peoples R China

出　　处：《Chinese Science Bulletin》1999年第7期664-668,共5页

摘　　要：A new method to calculate the formation enthalpies and free energies of compounds based on standard electromotive force of cation,φ⁰, and free energies of formation, ΔG₂₉₈⁰, or formation enthalpies, ΔH₂₉₈⁰, of chloride was proposed. A linear relationship between φ⁰ and ΔG₂₉₈⁰, φ⁰ and ΔH₂₉₈⁰, and ΔG₂₉₈⁰ and ΔH₂₉₈⁰ was found respectively. The parameters used for thermodynamic calculation were calculated. The calculated values of the formation enthalpies and the free energies of formation of platinum compounds, such as Pt₃（PO₄）₂ and Pt （PO₃）₂,were given for the first time. The mechanism of eliminating platinum inclusions in phosphate laser glass by POCI₃ gas bubbling was interpreted from thermodynamic aspect.A new method to calculate the formation enthalpies and free energies of compounds based on standard electromotive force of cation, φ0, and free energies of formation, ?G2980, or formation enthalpies,?H 2980, of chloride was proposed. A linear relationship between φ0 and ?G2980, φ0 and?H 298 0, and ?G2980, and?H 2980 was found respectively. The parameters used for thermodynamic calculation were calculated. The calculated values of the formation enthalpies and the free energies of formation of platinum compounds, such as Pt3,(PO4 21, and Pt(PO3)2, were given for the first time. The mechanism of eliminating platinum inclusions in phosphate laser glass by POCl3, gas bubbling was interpreted from thermodynamic aspect.

关 键 词：THERMODYNAMICS PHOSPHATE laser GLASS PLATINUM inclusions. 

分 类 号：TQ171.73[化学工程—玻璃工业]