介晶的

The carbon based materials have low electron affinity even negative electron affinity,and have the good ability of eradiating electrons in electric field.

其中非晶碳膜具有好的化学稳定性和热稳定性、高的熔点和热导率、小的介电常数、大的载流子迁移率和高的击穿电压，是一种很有前途的场发射冷阴极材料。

The work of this paper is mainly to deeply study the relation between the dielectric constant and lattice distortion of PZT and PT, based on their thermodynamic theory.

本文的工作是在PT和PZT热力学理论基础上从结构相变的角度深入地研究PT和PZT介电常数与晶格畸变的关系。

However, the monoclinic phase, with the lowest dielectric constant, is the stable phase under ambient condition.

然而在常温常压下单斜晶是最稳定的结构但是它的介电常数却是最低的。

The solid product was characterized by N2 adsorption-desorption, XRD, TEM and hydrothermal stability test. These results indicated that small amounts of HPMo in the synthesis media could reduce the amount of liquid in-organic acid and crystallization time greatly. And SBA-15 sieves prepared in this method exhibited an excellent hydrothermal stability, as its hexagonally ordered mesostructure was maintained after treated in 100 ℃ water over 72 h.

N2吸附-脱附、XRD、TEM和水热稳定性实验等检测结果表明：用这种方法不仅可以大幅度降低合成SBA-15分子筛所需液体酸的用量和缩短晶化时间，同时反应产物SBA-15在100 ℃的水中处理72 h后仍然保持六方有序的介孔结构。

The width of primary forming region of K2SO4 and Langbenite are reduced, and the width of primary forming regions of Leonite and MgSO4H2O are extended in different degrees.

在交错区域成盐的种类取决于晶种的种类，即存在条件成盐区，这是非平衡态成盐相关系区别于平衡相图和介稳相图的特征区域。

Dielectric, piezoelectric and electrmechanical coupling properties of PZT and PSZT systems at high Zr content region were studied. The feature of high Kt and low Kp of PZT-based materials near F-AF phase boundary was exploited and examined, and electromachanical coupling anisotropy Kt/Kp is higher than that at the morphotropic phase boundary , Kt≥0.40, Kt/Kp≥3. 0. This phenomenon can be realized by electric field -induced AF-F phase transition and explained by coupling effect of two-sublattice in antiferroelectric unit cell.

研究了PZT和PSZT两个系统在高锆区的介电、压电和机电耦合等性能，首次发现了PZT基材料在铁电-反铁电相界处具有高Kt和低Kp的性质，机电耦合各向异性Kt/Kp也比准同型相界要高，Kt≥0.40，Kt/Kp≥3.0，并把这一现象归因于电场诱导AF-F相变和反铁电双子晶格间的强耦合作用。

And precipitation rate of vanadium was higher than 98.5%. Five vanadium catalysts were made withγ-Al_2O_3 and the mesoporous molecular sieve MCM-41 as carrier, and were made by dipping method, intermingle process and functionalizing method respectively. The characterization of their pore size, crystal structure, specific surface area and V_2O_5 load of catalysts were studied by XRD, the adsorption /desorption of N_2 technique, Raman spectroscopy and XRF. The activities of the catalysts estimated by the synthesis of DPC with DMC and phenol.

钒催化剂的制备与表征及活性评价：是分别以γ-Al_2O_3和介孔分子筛为载体，采用浸渍法，掺杂法及官能化法制备了5种钒催化剂；分别对其进行了XRD分析、N_2吸附-脱附分析、红外光谱分析和荧光分析，对其孔径、晶型结构、比表面积和V_2O_5负载量进行了表征；以碳酸二甲酯和苯酚的酯交换合成碳酸二苯酯的典型反应为依据，对钒催化剂进行了活性评价。

It is found that these two organic dopant TGS crystals have better figures of merit than that of.

系统地研究了有机双取代基TGS系列晶体的生长形态、晶胞参数、主要的介电、热释电和铁电性能参数等，发现这几种双有机取代基TGS晶体的品质因子有不同程度地提高。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。