The efficiency of sulfur capture of CaO, Ca（OH）2 and CaCO3 as well as the effect of CuO on them were studied. Results showed that the efficiency of sulfur capture of Ca（OH）2 is the highest among these three compou...The efficiency of sulfur capture of CaO, Ca（OH）2 and CaCO3 as well as the effect of CuO on them were studied. Results showed that the efficiency of sulfur capture of Ca（OH）2 is the highest among these three compounds. When CuO was used with each of CaO, Ca（OH）2 and CaCO3 at the same time, the efficiency of all of them would rise, and that of Ca（OH）2 raise most. The efficiency of sulfur capture of Ca（OH）2 with CuO is 14.4% higher than that without CuO.展开更多
Sr_(0.5)Ca_(0.5)CuO_2 has been synthesized by the solid state reaction.The compound crystallizes in an orthorhombic unit cell,space group D_(2h)^(17)-Cmcm with a=3.444 ,b=16.11 ,c=3.868 .It decomposes shove 1038℃. ...Sr_(0.5)Ca_(0.5)CuO_2 has been synthesized by the solid state reaction.The compound crystallizes in an orthorhombic unit cell,space group D_(2h)^(17)-Cmcm with a=3.444 ,b=16.11 ,c=3.868 .It decomposes shove 1038℃. Sr_(0.5)Ca_(0.5)CuO_2 is s black p-type semiconductor with resistivity 53Ω.cm at room tempersture.展开更多
The perovskite-like structure compound Ca0.85- CuO2 has interesting structural properties: it has infinite one-dimensional edge-sharing copper-oxygen chains as well as partial occupancy of the Ca sites resulting in an...The perovskite-like structure compound Ca0.85- CuO2 has interesting structural properties: it has infinite one-dimensional edge-sharing copper-oxygen chains as well as partial occupancy of the Ca sites resulting in an incom-mensurate superstructure. In situ high-pressure energy dis-persive X-ray diffraction measurements on polycrystalline powder Ca0.85CuO2 have been performed by using diamond anvil cell (DAC) instrument with synchrotron radiation. The results for the first time show that edge-sharing copper oxide Ca0.85CuO2 undergoes a structural transition at 14.5 GPa, and furthermore the structural transition is reversible.展开更多
文摘选取传统高温固相反应合成法制备出Bi_2O_3掺杂的无铅压电陶瓷材料Ba_(0.85)Ca_(0.15)Zr_(0.08)Ti_(0.92)O_3-xBi_2O_3(BCZT-x Bi,x=0~0.15)。采用扫描电子显微镜、准静态压电常数测试仪等一系列检测手段,探讨了Bi_2O_3掺杂对BCZT基无铅压电陶瓷微观组织和电学性能产生的作用,从SEM图像得知,陶瓷的晶粒尺寸随着Bi_2O_3掺杂量的增多先逐渐变小后略微有所增大,XRD图谱则表明,掺杂量不等的Bi^(3+)均能够弥散进入钛酸钡晶格中,能完整固溶于BCZT陶瓷,并且材料具有典型的钙钛矿相结构。当Bi_2O_3掺杂量为0.15 mol%时,此无铅压电陶瓷材料拥有较好的介电性能,介电损耗tanδ的值仅是1.2%,介电常数ε_r的值是5100;当没有掺杂Bi_2O_3时,此陶瓷的压电性能最优,压电系数的值d_(33)=386 p C/N,机电耦合系数的值K_p=44.8%。
文摘The efficiency of sulfur capture of CaO, Ca（OH）2 and CaCO3 as well as the effect of CuO on them were studied. Results showed that the efficiency of sulfur capture of Ca（OH）2 is the highest among these three compounds. When CuO was used with each of CaO, Ca（OH）2 and CaCO3 at the same time, the efficiency of all of them would rise, and that of Ca（OH）2 raise most. The efficiency of sulfur capture of Ca（OH）2 with CuO is 14.4% higher than that without CuO.
文摘Sr_(0.5)Ca_(0.5)CuO_2 has been synthesized by the solid state reaction.The compound crystallizes in an orthorhombic unit cell,space group D_(2h)^(17)-Cmcm with a=3.444 ,b=16.11 ,c=3.868 .It decomposes shove 1038℃. Sr_(0.5)Ca_(0.5)CuO_2 is s black p-type semiconductor with resistivity 53Ω.cm at room tempersture.
文摘The perovskite-like structure compound Ca0.85- CuO2 has interesting structural properties: it has infinite one-dimensional edge-sharing copper-oxygen chains as well as partial occupancy of the Ca sites resulting in an incom-mensurate superstructure. In situ high-pressure energy dis-persive X-ray diffraction measurements on polycrystalline powder Ca0.85CuO2 have been performed by using diamond anvil cell (DAC) instrument with synchrotron radiation. The results for the first time show that edge-sharing copper oxide Ca0.85CuO2 undergoes a structural transition at 14.5 GPa, and furthermore the structural transition is reversible.
