(ZrO2)1-x（Yb2O3）x （x=0.07, 0.09, 0.11） nanocrystallites were hydrothermally prepared in basic media by using co-precipitated Zr（OH）4 and Yb（OH）3 as precursor. The nanocrystallites have small particle sizes of ...(ZrO2)1-x（Yb2O3）x （x=0.07, 0.09, 0.11） nanocrystallites were hydrothermally prepared in basic media by using co-precipitated Zr（OH）4 and Yb（OH）3 as precursor. The nanocrystallites have small particle sizes of 5.87.5 nm, narrow size distribution, less agglomeration and high sinterability. The oxide-ionic conduction properties of the prepared ceramics were investigated by means of AC impedance spectroscope, oxygen concentration cell at 6001 000 ℃. The results show that the ceramic with x=0.09 is superior to the ceramics with x=0.07 and 0.11 in oxide-ionic conduction.展开更多
The complex Cu（teta）（NO3）2 （teta=meso-5,7,7,12,14,14-hexamethyl-1,4,8,11-tetraazacyclotetradecane）was synthesized and characterized by elementary analysis, IR and UV and the structure was determined by single-cr...The complex Cu（teta）（NO3）2 （teta=meso-5,7,7,12,14,14-hexamethyl-1,4,8,11-tetraazacyclotetradecane）was synthesized and characterized by elementary analysis, IR and UV and the structure was determined by single-crystal X-ray diffraction. The crystal belongs to monoclinic, space group C2/c with α=12.992（9）, b=11.639（7）, c=15.838（10）*!, β=116.802（8）°, V=2138（2）*!3, Z=4, Gcalc=1.467g/cm3,F（000）=1004. The complex has the centrosymmertric copper（Ⅱ） ion in square planar co-ordination with four nitrogens of the macrocycle.展开更多
文摘(ZrO2)1-x（Yb2O3）x （x=0.07, 0.09, 0.11） nanocrystallites were hydrothermally prepared in basic media by using co-precipitated Zr（OH）4 and Yb（OH）3 as precursor. The nanocrystallites have small particle sizes of 5.87.5 nm, narrow size distribution, less agglomeration and high sinterability. The oxide-ionic conduction properties of the prepared ceramics were investigated by means of AC impedance spectroscope, oxygen concentration cell at 6001 000 ℃. The results show that the ceramic with x=0.09 is superior to the ceramics with x=0.07 and 0.11 in oxide-ionic conduction.
文摘The complex Cu（teta）（NO3）2 （teta=meso-5,7,7,12,14,14-hexamethyl-1,4,8,11-tetraazacyclotetradecane）was synthesized and characterized by elementary analysis, IR and UV and the structure was determined by single-crystal X-ray diffraction. The crystal belongs to monoclinic, space group C2/c with α=12.992（9）, b=11.639（7）, c=15.838（10）*!, β=116.802（8）°, V=2138（2）*!3, Z=4, Gcalc=1.467g/cm3,F（000）=1004. The complex has the centrosymmertric copper（Ⅱ） ion in square planar co-ordination with four nitrogens of the macrocycle.
