查询词典 tetragonal

The results of X-ray diffraction confirmed that the samples were pure and had a tetragonal K2 NiF4-type structure.

电阻率结果表明这组样品在测量温区都是半导体行为。

Four non-ionic europium complexes,〓-phen(11),〓·bipy(12),〓·dia(13) and 〓(14)(TTA=2-thenoyltrifluoroacetone, DBM=dibenzoylmethane, phen=phenanthroline, bipy=2,2'-bipyridine, dia=4,5- diazafluoren-9-one, dmbp=4,4'-dimethyl-2,2,-bipyridine), were synthesised and the triboluminescent phenomena of 12, 13 and 14 were firstly observed. Structure determinations of 11,12 and 14 were carried out. The triboluminescence maxima of 12 and 13 are similar to those of their photoluminescence. X-Ray structure analyses show that Eu atoms all exhibit eight-coordinate tetragonal antiprismatic geometries and complexes 11, 12 and 14 are all centrosymmetric.

二、合成了四个非离子型的铕的配合物：〓、〓、和〓(14)[HTTA=2-噻吩三氟甲酰丙酮，DBM=二苯甲酰基甲烷，phen=邻菲罗啉， bipy=2，2'-联吡啶，dia=4，5-二氮杂芴-9-酮，dmbp=4，4'-二甲基-2，2'-联吡啶]，首次报道了12、13及14的摩擦发光性质，测定了11、12及14的晶体结构，并系统地讨论了晶体结构和摩擦发光活性之间的关系。12及13的摩擦发光光谱的极大值均类似与其相应的光致发光光谱，表明它们有相同的激发态。

It was found that the tetragonal transition phase and triclinic transition phase are two new long range ordering phases, which are more stable than c-ZrO〓.

复合PSZ高温时效后观察到两种新的长程有序过渡结构：四方过渡结构和三斜过渡结构，它们都是比c-ZrO〓更稳定的结构。

Due to their applications in magnetic, optical, electronic and catalyst, polynuclear lanthanide clusters are of importance. In this part, a series of nanowheel-shaped nonanuclear lanthanide clusters,〓〓(Ln=Sm~Tm; BA=benzoylacetone), were prepared and characterized. Each complex can exist in three phases, i. e., cubic, tetragonal and triclinic.

本论文第二部分在醇溶液中以三乙胺调变溶液pH，利用β-二酮配位方式的灵活性成功地构筑了一系列结构稳定、纳米尺度轮状的九核稀土配合物〓〓（Ln=Sm~Tm；BA=苯甲酰丙酮），并在不同溶剂中重结晶分别得到了三斜、四方以及立方三种晶型的晶体。

Tetragonal phase ZrO2 nano-powders containing 3%Y2O3 was prepared via the coupling route of water-oil emulsion with methyl oxalate homogenous precipitation, in which xylol was used as the oil phase, span-80 as the surfactant, and an aqueous solution containing zirconium as the water phase.

摘 要：采用二甲苯为油相， span-80为表面活性剂， Zr(NO3)4(3Y)的水溶液为水相的W/O 乳浊液和草酸二甲酯均匀沉淀结合法制备四方相ZrO2(3Y)纳米粉。

Tetragonal phase ZrO2 nano-powders containing 3% Y2O3 were prepared via the coupling route of W/O emulsion with urea homogenous precipitation, in which xylol was used as the oil phase, span80 as the surfactant, and an aqueous solution containing zirconium as the water phase.

摘 要：以二甲苯为油相，span80为表面活性剂，Zr(NO3)4(3Y)水溶液为水相的W/O 乳浊液，采用尿素均匀沉淀结合法制备四方相ZrO2(3Y)纳米粉。

The tetragonal zirconia polycrystals containing ytterbia with high flexural strength and fracture toughness were obtained by use of hot pressing.

用热压方法制得了含有氧化镱的高强度、高韧性四方相氧化锆陶瓷材料。

OBJECTIVE: To analyze the sintering and mechanical properties and microstructure of nano-powder 3 mol % yttria stabilized tetragonal zirconia polycrystal (3Y-TZP).

目的：分析摩尔分数为3%氧化钇稳定的四方多晶氧化锆(3Y-TZP)的烧结性能、力学性能及微观结构。

The results suggested that yttria has a more effect on suppressing grain growth and stabilizing tetragonal phase than that of ceria when added at the same amount.

首次提出NH〓Cl在沉淀反应过程中依靠过饱和析出，并包裹在由Zr〓和Y〓共同组成微核上使其相互隔离的微观机制模型，该模型能很好地解释NH〓Cl加入量多少对粉料粒径及团聚状态的影响规律。

The fine nanostructure yttria stabilized tetragonal phase zirconia membrane is prepared by sol-gel method and the wetting ability of the ceramic thin film before and after laser ablation is discussed.

应用溶胶-凝胶法制备了纳米量级钇稳定四方相精细氧化锆陶瓷膜，研究了陶瓷膜在一定强度的激光作用下，其表面浸润性的变化情况。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。