查询词典 zirconia

The product properties had been improved by using fused magnesium partial-stabilized zirconia, fused calcium partial-stabilized zirconia and baddeleyite as raw materials, adding a certain of additives and agents, rationally choosing grain composition, optimizing craft parameter and adjusting zirconia's stabilization rate of specimen in the research.

为此，本试验采用以电熔氧化镁部分稳定氧化锆、电熔氧化钙部分稳定氧化锆和斜锆石为原料，加入一定的添加剂和结合剂，合理调整原料的颗粒级配，优化成型工艺，调整制品中氧化锆的稳定化率，改变制品的性能。

The results indicate that the effect of anhydrous and un-hydroxyl resin is better than liquid paraffin and each of electrocast zirconia and monocline zirconia can promote sintering of magnesia-calcia brick,and the effect of monocline zirconia is better than that of electracast zirconia.

结果表明：作结合剂用时无水无羟基树脂效果好于液体石蜡；作为添加剂时电熔氧化锆和单斜氧化锆均能显著促进镁钙砖的烧结，其中单斜氧化锆的效果好于电熔氧化锆。

The most common electrolyte material is Yttria Stabilized Zirconia; the cathode is generally made up of porous perovskite-structured ceramics.

最普通的电介质材料是Yttria Stabilized Zirconia；阴极一般由多孔钙钛矿结构陶瓷组成。

Low vacuum measurement ; yttria stabilized zirconia ; zirconia oxygen sensor ; zirconia oxygen concentration cell

低真空测量；氧化钇稳定氧化锆；氧化锆氧传感器；氧化锆氧浓差电池

XPS experiments showed that zirconia sample possesses a 2p electron binding energy of phosphorus at 132.95 eV after the zirconia was treated with DNA solution, which showed that DNA was adsorbed onto this zirconia; TEM images showed that DNA appears in emanant on zirconia particle.

研究了镧离子、铕离子及钙离子对DNA电子传递速率的影响，用Tafel方程计算了动力学速率常数。结果表明，在金属离子的浓度均为1.0×10〓mol/L时，分别加入铕离子、镧离子及钙离子，其动力学常数分别是原来的2.91倍、2.26倍及1.45倍，其增加的顺序是Eu＞La＞＞Ca。

The results show that, by the way of optimizing preparation condition, the spherical zirconia powders with suitable particle size distribution are prepared using chemical precipitation method. Using heterogeneous chemical precipitation coating technique, the sph, erical nickel coated zirconia powders are prepared and the heterogeneous nucleation can be done on the surface of spherical zirconia powders. The thickness of coated layer, homogeneous degree and crack of surface can be controlled by the way of controlling powder concentration, adding rate of reactants feeding and adding surface active agent.

研究表明，采用化学沉淀法，通过优化制备工艺条件，可以制备粒径分布较均匀的球形氧化锆粉体；利用非均相化学沉淀包裹技术制备的金属镍包裹氧化锆微球粉体，球形氧化锆颗粒表面作为异相成核的场所，通过控制颗粒浓度、加料速度以及添加表面活性剂等工艺条件，可以调控包裹层厚度、表面均匀度以及表面裂纹等。

The results of color reaction of zirconia with ammonium molybdate indicate that, in both cases, DDPA adsorbed on zirconia via the combination of one phosphonic group with zirconia, and another phosphonic group was free.

通过磷的显色反应发现，DDPA只以1个膦酸基团与氧化锆结合，而另一个膦酸基团则处于游离状态。

Fibrous hydrous zirconia, spinnable hydrous zirconia chelated by acetylacctone and modifiedhydrous zirconia were synthesized from zirconium oxychlorid(ZrOCl_2·8H_2O) and then applied toprepare ZrO_2/PVA electrospinning hybrid fibers, ZrO_2/PVA continuous hybrid fiber and ZrO_2/PVPhybrid microsphere respectively. The chemical structure, properties, microstructure and formationmechanism of the corresponding materials were investigated.

论文以无机盐ZrOCl_2·8H_2O为原料，合成出纤维状的ZrO_2水合物、乙酰丙酮配位的可纺性ZrO_2水合物和正丁醇改性的ZrO_2水合物，分别与PVA和PVP杂化复合，制备出ZrO_2／PVA杂化电纺纤维、ZrO_2／PVP杂化连续纤维和ZrO_2／PVP杂化微球，并对相关材料的组成、结构、性能及形成机理等进行了深入分析和研究。

The mian works are as follows:(1)By coprecipitation technique and coprecipitation- gel technique the nano zirconia powder was produced, factors affecting the properties of nano zirconia powder such as pH and the content of stabilizator are analyzed;(2)By the new pressless sintering process, the nano zirconia ceramic was produced, factors which can affecting the properties of nano zirconia sinter body such as moulding press and the sinter temperature are analyzed;(3)By the microtherm pressless sintering process, the nano copper added functional zirconia ceramic composite was produced, microscopic dimensionality and electric properties of such sinter body and the factors affecting such sinter body are analyzed;(4)By the self-invented "external albumen coating" technique the zirconia powder was successfully coated by carbon in the corresponding sinter body, which can help solve the traditional aggregation problem to some degree;(5)Based on analyze the characteristics in the nano powder sinter process, the "three-ball sinter model" was proposed, for the relationship between the relative density and porosity of sinter body, by mathematical fitting, such model was successfully verified.

本研究比较系统地研究了纳米氧化锆陶瓷的合成与成型机理，特别是讨论了纳米氧化锆陶瓷的稳定性，为防止纳米颗粒在外场作用下的团聚和长大提供了理论基础和实验数据，具体工作有以下几方面：(1)采用共沉淀法和共沉淀-凝胶法制备了纳米氧化锆粉体，并分析了pH值和稳定剂含量对粉体性能的影响；(2)采用新型无压烧结工艺制备了纳米氧化锆陶瓷，并分析了成型压力和烧结温度对烧结体性能的影响；(3)采用低温无压烧结工艺制备出添加纳米铜的功能性纳米氧化锆复合陶瓷，并分析了烧结体的微观尺度和电学性能的变化以及影响因素；(4)通过自创的&鸡蛋清外敷法&在真空镀膜台上对纳米氧化锆粉体进行包敷碳颗粒的表面处理，并采用真空烧结工艺制得相应烧结体，初步开始解决陶瓷烧结过程中团聚长大这一传统难题；(5)通过分析纳米颗粒在制备烧结体过程中的实际特点，提出了&三球烧结数学模型&，通过引入坯体相对密度和孔隙率的相对关系分析并通过自行编写的数学拟合软件，验证了这一数学模型。

Zirconia/graphite compound mold core was prepared by the coating, in which the silicon sol was used as binder and zirconia was used as refractory materials. The application feasibility of metal particles as a coolant in the solidification process was studied, and the application of metal particles as subsidiary coolant in the liquid metal cooling of directional solidification were analyzed and studied in this investigation. The conclusions can be drawn as follows: 1 The zireonia/graphite compound cores fabricated by brushing coating which was prepared by making silicon sol agglutinated zirconia as a refractory material were casteded at 800℃and 1000℃respectively, and the results show that the strength of the mold core is strong enough to meet the requirement of practical casting.

本文研究了以硅溶胶为粘结剂，氧化锆为耐火材料来制备氧化锆／石墨复合型芯的制备工艺；并分析了金属颗粒作为冷却剂在金属凝固过程中应用的可行性、金属颗粒的冷却能力以及金属颗粒作为辅助冷却剂在定向凝固的液态金属冷却法中的应用，得出以下结论：(1)以硅溶胶为粘结剂，氧化锆为耐火材料来配制涂料，采用刷涂石墨型芯的方法来制备的氧化锆／石墨复合型芯经800℃和1000℃实际浇铸实验，结果证明型芯的强度足够满足实际浇铸要求。

By the time of its fall, most of the prisoners were writers who had written against the corruptions of the government.

到它被攻陷的时候，里面多数的犯人是写了反对政府贪污文章的作家。

The most obvious variation to ovum morphological character was that the color was changed from light green to sepiaceous in embryonic development, and all the ovums were almost hatched after 96h.

在胚胎发育过程中卵的形态特征最明显的变化是颜色从淡绿到深褐色，卵在发育96h后卵基本全部孵化。