| 1. | This is a blue colour stain with a spinel structure , widely used in glazes
这浅蓝色料具有尖晶石结构，广泛适用于不釉中。 |
| 2. | It ' s obtained that ph = 6 . 5 is a suited ph value for getting ideal product with good properties . the calcinate temperature is the key factors to transform the precursor to a pure product with spinel structure
研究了不同的工艺条件如溶液ph值、焙烧温度、焙烧时间、焙烧方式、 li / mn的比值对产物结构的影响。 |
| 3. | Above investigation shows that the reason why dopant can improve cycling performance is that the bond energy between doped element and oxygen is stronger than that of mn - 0 to stabilize the spinel structure
研究认为，掺杂改善循环性能的主要原因是掺杂元素与氧的键能强于锰与氧的键能而起到了稳定结构的作用。 |
| 4. | The pure sample with spinel structure can be easily prepared by optimizing the processing parameters . the typical product is limnio4 with the cell constant a = 8 . 235 and the powder size belongs to nanometer and sub - micrometer
表明用改进的柠檬酸配合法可以合成出单相正尖晶石limn _ 2o _ 4 ，其典型的试样组成为limn _ 2o _ 4 ，晶格常数= 8 . 235 ，粒度大小为纳米级。 |
| 5. | ( c ) the total energy of manganate - oxides materials decreases after intercalation lithium . the electrovalent bond weakens and the covalent bond strengthen between manganese and oxygen due to ion polarization effect , which makes the spinel structure more stable
( 3 )对于锰系材料嵌锂后，体系总能量降低；锂离子的静电作用和极化作用，使锰氧之间的离子键成分减小，共价键成分增加，整个尖晶石骨架结构更加稳定。 |
| 6. | However , inhering limit from that in the layered and spinel structures , there is no continuous network of feo _ 6 edge - shared octahedral that might contribute to electronic conductivity , resulting in a extremely low electronic conductivity , which has been the greatest obstacle for application of lithium ion phosphate
然而由于晶体结构的固有限制, lifepo _ 4具有极低的电子导电率,这已成为限制其应用的最大障碍。 |
| 7. | ( 2 ) the oxygen - rich spinel material from sintering the precursor at low temperature changed into perfect spinel structure due to releasing the excess oxygen when raised the sintering temperature slowly , which caused the lattice expanded and at the same time the system energy lowered and the bonding energy raised , and tansformed into the stoichiometric limn2o4 at 700
( 2 )低温烧结合成的材料为富氧型尖晶石材料，随着温度的升高，结构中多余的氧逐渐释放，系统能量降低，结合能增加，品格发生膨胀，样品向完整的尖晶石结构逐渐过渡。 700得到的材料为化学量的limn _ 2o _ 4 。 |
