CAJ | 학술논문

本文对PbI2合成反应体系的反应焓变,反应熵增,Gibbs自由能变化和反应平衡常数进行了理论计算,从热力学角度论证了选取PbI2熔点(678K)以上的723K作为体系合成反应控制温度的可行性.在723K的控温工艺下,采用两温区气相输运方法合成出高纯、单相的PbI2多晶材料,XRD分析结果表明符合热力学计算结果的控温工艺能有效地应用于PbI2多晶合成.
본문대PbI2합성반응체계적반응함변,반응적증,Gibbs자유능변화화반응평형상수진행료이론계산,종열역학각도론증료선취PbI2용점(678K)이상적723K작위체계합성반응공제온도적가행성.재723K적공온공예하,채용량온구기상수운방법합성출고순、단상적PbI2다정재료,XRD분석결과표명부합열역학계산결과적공온공예능유효지응용우PbI2다정합성.
The molar enthalpy change, the molar entropy increase, the Gibbs free energy and the balance constant of PbI2 polycrystal synthesis reaction were calculated in this paper. Based on the thermodynamics analysis,the feasibility of controlling synthesis reaction temperature on 723K upon the melting point (678K) of PbI2 was discussed also. Through the craft controlling on 723K,highly pure and single phase PbI2 polycrystal was synthesized by two temperature vapor transporting method(TVM).The result of XRD analysis indicates the temperature controlling craft accordant with thermodynamics calculating which can be used for PbI2 pelycrystal synthesis effectively.