CAJ | 학술논문

通过对Ag/CuO复合材料在反应合成制备中各元素、亚金属氧化物与1 mol氧气反应生成金属氧化物的标准自由焓的热力学计算,绘制了标准自由焓与温度关系图;考虑到氧压力对反应进行有重要影响,在标准自由焓与温度关系图中绘制了氧压力随温度变化的直线.结果表明:Ag与O_2,Cu_2O与O_2的反应是一种可逆反应,其发生可逆转变的温度分别为586.818,667.663 K;氧的压力对金属氧化物的分解有重要影响:压力越低,金属氧化物越易分解;并通过热力学分析结果,最终确定了Ag/CuO复合材料反应合成烧结工艺.
통과대Ag/CuO복합재료재반응합성제비중각원소、아금속양화물여1 mol양기반응생성금속양화물적표준자유함적열역학계산,회제료표준자유함여온도관계도;고필도양압력대반응진행유중요영향,재표준자유함여온도관계도중회제료양압력수온도변화적직선.결과표명:Ag여O_2,Cu_2O여O_2적반응시일충가역반응,기발생가역전변적온도분별위586.818,667.663 K;양적압력대금속양화물적분해유중요영향:압력월저,금속양화물월역분해;병통과열역학분석결과,최종학정료Ag/CuO복합재료반응합성소결공예.
Gibbs' function of metal oxide from the reaction between elements as well as sub-metal oxides and 1 mol oxygen in Ag/CuO composites by reactive synthesis was calculated thermodynamically; through the calculation, the relation diagram was drawn for Gibbs' function and temperature. Considering oxygen pressure influencing the reaction greatly, the oxygen pressure line with temperature change was also drawn in the diagram above. Results show that the reactions between Ag and O_2, and Cu_2O and O_2 are reversible, whose temperature for reversible transition are 586.818 K and 667.663 K, respectively. The oxygen pressure is important for decomposition of metal oxides: the lower the oxygen pressure is, the more easily the oxides decompose. The reactive synthesis sintering technology of Ag/CuO composite was determined by thermodynamic analysis.