Cd-Te系半導体材料の平衡状態図と熱力学に関する研究

Cd-Te半导体材料平衡相图及热力学研究

• 批准号: 05750653
• 负责人: 山口 勉功
• 金额: $ 0.58万
• 依托单位: Iwate University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Encouragement of Young Scientists (A)
• 财政年份: 1993
• 资助国家: 日本
• 起止时间: 1993 至 无数据
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-05750653/
• 关键词: CdTe化合物; 双子型溶解熱量計; 落下型熱量計; 生成熱; 熱含量; 比熱; 熱力学解析法

本研究では,CdTe化合物の生成熱をカルベ型の双子型溶解熱量計を用いて,また,Cd-Te2元系の熱含量を落下型熱量計を用いて測定し,得られた生成熱と含熱量値に熱力学解析法を適用し,Cd-Te2元系融体の熱力学量の導出を試みた。その結果は次のように要約される。1)双子型溶解熱量計を用いた溶解熱測定により,773KにおけるCdTe化合物の生成熱は,-138.3±0.9kJ/molと決された。また,773Kにおける生成熱より,298.15Kにおける標準生成熱は,-111.4±0.9kJ/molと決定された。2)Cd-Te2元系の熱含量を0.5≦N_<Tb>≦0.95の範囲に渡り,800〜1450Kの温度範囲で測定し,熱含量-温度-組成相関図を作成した。得られた相関図に基づき,Cd-Te2元系の状態図およびCdTe化合物の融点,融解熱が決定された。CdTe化合物の融点および融解熱は,それぞれ,1373±2K,43.5±0.3kJ/molを示した。3)CdTe化合物の熱含量測定結果にShomate関数を適用し,CdTe化合物の比熱の温度式を算出した。その結果は次式で書き表すことができる。Cp/J・mol^<-1>・K^<-1>=47.3+10.81・10^<-3>・T-0.49・10^5T^<-2>(800≦T/K≦1373)Cp/J・mol^<-1>・K^<-1>=179.3(1373≦T/K≦1450)4)得られたCdTe化合物の標準生成熱ならびにCd-Te2元系の熱含量値に熱力学解析法を適用し,1400KにおけるCd-Te2元系融体の混合自由エネルギー,成分活量,混合熱,混合エントロピ変化を導出した。Cd-Te2元系のカドミウムの活量は,Raoul則より大きく負に偏倚し,テルルの活量は僅かに正に偏倚した。また,Cd-Te2元系の混合エントロピ変化は,化合物組成で負の値を示し,融体中にchemical short range orderが存在していることを示唆する。5)Cd-Te2元系融体のalpha関数は,組成に対し曲線を呈し,単純な溶液モデルには従わないことが分かった。6)活量結果に基づき,蒸気圧-組成相関図を作成した。CdTe化合物組成,融点1337Kにおいて,TeとCdの蒸気圧を合計した有効蒸気は,0.817atmと決定された。

In this study, CdTe compounds were used to calculate the solubility of the Gemini type, the content of the Cd-Te2 elemental system and the falling content of the Gemini compound were determined by the quantitative analysis method, and the experimental data were obtained by the mechanical analysis method of the Cd-Te2 elemental system. The results show that there are significant differences between the two groups. 1) the Gemini type dissolution volumetric meter was used to determine the concentration of CdTe compounds at 773K and-138.3 ±0.9kJ/mol respectively. The standard was generated at 773K and 298.15K, and the standard was determined by-111.4 ±0.9kJ/mol at 773K. 2) the content of Cd-Te2 element is 0.5 nm, the temperature range is 0.95, the temperature range is 800 to 1450K, and the content-temperature-composition phase is used to make the mixture. The melting point of the compound CdTe is determined by the melting point of the CdTe compound. CdTe compound "melting point", "1373 ±2K" and "43.5 ±0.3kJ/mol". 3) the content of CdTe compound was determined. The results showed that the temperature of Shomate compound was calculated by temperature formula, and the temperature of CdTe compound was calculated by temperature formula. The results show that the secondary table shows that there are some errors in the table. Cp/ J ·mol ^ & lt;-1> K ^ & lt;-1>=47.3+ 10.81 ·10 ^ & lt;-3> T-0.49 ·10 ^ 5T ^ & lt;-2> (800m T lt;-1> K ^ 1373) Cp/ J ·mol ^ & lt;-1> K ^ & lt;-1&gt = 179.3 (1373 T CdTe K 1450) 4) the standard of chemical CdTe compounds was obtained. The content of Cd-Te2 meta-system was analyzed by mechanical analysis, 1400K and 1400K, the melt of Cd-Te2 meta-system was mixed freely, the activity of composition, the activity of composition, the content of compound, the The Cd-Te2 meta-system is biased, Raoul-biased and positive-biased. The chemical composition of the compound, the chemical short range order, the compound, the compound, the 5) the Cd-Te2 meta-system fusion system has a number of alpha data, which is divided into two parts: the number of components, the number of curves, and the number of components. 6) the results showed that the basic temperature was reduced, and the temperature was made by steaming into a phase. The CdTe compound is composed of a melting point of 1337K and a melting point of 1337K. The temperature of the Te compound is 1337K, and the temperature of the 0.817atm compound is determined by the 0.817atm compound.

项目成果

Katsunori Yamaguchi: "Measurements of High Temperature Heat Contenet of the II-Vl and IV-VI(II:Zn,Cd,IV:Sn,Pb VI:Se,Te)Compiunds" Mater.Trans.,JIM. 35. 118-124 (1994)

Katsunori Yamaguchi：“II-VI 和 IV-VI(II:Zn,Cd,IV:Sn,Pb VI:Se,Te) 化合物的高温热含量的测量”Mater.Trans.，JIM。