| 1. | In the thesis , mechanism of ferroelectrics phase transition is discussed
本论文研究铁电相变的机制。 |
| 2. | Dielectric response in ferroelectric phase transition in barium titanate powder
粉料铁电相变的介电效应 |
| 3. | A density functional theory investigation of the electronic structure and ferroelectric phase transition of batio3 and pbtio
钛酸铅及钛酸钡的电子结构和铁电相变的密度泛函理论研究 |
| 4. | The tetragonal phase of pbtio3 is very stable owing to its large tetragonal strain , and relatively small tetragonal stain of batio3 is an important reason for its low - temperature phase transition
由于钛酸铅具有较大的四方应变，使得其能够在四方相稳定下来，而钛酸钡较小的四方应变是其仍能够发生低温铁电相变的一个重要原因。 |
| 5. | In the system , the dipoles " appearance and parallel arrangement lead to occurrence of spontaneous polarization , which is the essence of ferroelectrics phase transition . the interaction between dipoles is long - distance coulomb force
铁电相变的实质是系统中电偶极矩的平行排列导致自发极化的出现，电偶极矩的相互作用是长程库仑力。 |
| 6. | But at low temperatures it deviates from the curie - weiss behavior and saturates at even lower temperatures , which can be attributed to the effect of quantum fluctuation that stabilizes the paraelectric phase and suppresses the ferroelectric phase transition entirely
量子顺电体的介电常数在低温时呈现类似于居里-外斯定律的行为，即显示出将要发生铁电相变的征兆，但直至最低温度都不发生铁电相变。 |
| 7. | Abstract : on the basis of the theory of controlled phase - changes of piezoceramics , high - temperature polarizing technology makes initial working temperature a little higher than curie temperature of a sample , but the polarization voltage needed is greatly lower than the one needed in normal polarization ( only 1 / 10 - 1 / 5 ) . the improved polarizing technology can make polarization more complete
文摘:压电陶瓷的高温极化是利用受控的场致有序化的顺电铁电相变原理，使起始极化温度略高于样品的居里温度，但所需的极化电压大大低于常规极化，仅为1 / 10 - 1 / 5 ；选择较高的降温升压速率，可使极化趋于更加完全，具有常规极化工艺无可比拟的优越性。 |
| 8. | Some cubic perovskites are good cases in point such as srtio3 and ktao3 . experimental results show that when ba2 + and li + are doped into the above materials respectively and at the same time the impurity content is higher than their critical concentration , the impurity induced ferroe lectric phase transition occurs
Srtio _ 3和ktao _ 3是典型的量子顺电体，实验表明当两者分别掺杂ba ~ ( 2 + )和li ~ +且杂质浓度超过各自的临界浓度时，顺电相不再稳定，出现由杂质导致的铁电相变。 |
| 9. | The la - modified thin films with 220nm thickness exhibited diffuse phase transition through the testing of temperature dependence of dielectric permittivity . the abnormal dielectric phenomenon was explained according to the observed relaxor behavior . the influence of post - annealing on the properties of the ferroelectric thin - film capacitors is another component of this thesis
在薄膜的介电性质方面，通过对介电温谱的测试，发现对于厚度薄至220nm的薄膜，掺镧后同样会导致驰豫型的铁电相变，并依此解释了介电常数的“反常”现象。 |
