二氧化铈

So, the smaller precursor and product were obtained. When decomposed into ceria particles, the precursor burst apart from～510nm to～300nm because of the gas come into being and expand.

在煅烧分解过程中，前驱物分解为二氧化铈粉末，由于气体的产生、膨胀使前驱物崩裂，发生崩裂及抽空行为，颗粒度由前驱物的～510nm变为产物的～300nm。

The effect of ceria and titanium dioxide on photocatalytic degradation of phenol waste water had been compared. It showed that ceria excelled at the removal of phenol than titanium dioxide.

比较了二氧化铈和二氧化钛对苯酚废水光催化降解的效果，二氧化铈对苯酚的去除率优于二氧化钛。

Keywords cerium oxide;nanoparticles;lubricating oil additives;tribological performances

二氧化铈；纳米粒子；润滑油添加剂；摩擦学性能

The metal is used in alloys and other metallurgical applications and (because it oxidizes strongly and rapidly) in illumination, ignition , and signaling devices and in propellants. Misch metal, used in lighter flints, is 50% cerium.

铈及其化合物有很多用途，二氧化铈在光学工业中用于玻璃的精细拋光，在瓷器涂层中用作不透明剂，在玻璃制造业中用作脱色剂。

The type of precipitant not only significantly affects the coprecipitation of ruthenium and cerium ions, but also affects the reduction of the surface oxygen.

沉淀剂种类不仅明显地影响钌离子和铈离子的共沉淀，而且会影响载体二氧化铈表面氧的还原。

School of Environmental Science and Engineering, Shandong University, Shandong Jinan, 250062Abstract: The preparation methods of nanometer ceric oxide at home and abroad were reviewed, their advantages and disadvantages were discussed, and its application fields were introduced too.

山东大学环境科学与工程学院，山东济南，250062摘要：综述了国内外纳米二氧化铈的制备方法，比较了各方法的优缺点，并介绍了纳米二氧化铈的应用领域。

Cerium dioxide ultrafine powder is prepared by electrochemical method using composite coating of In-Ru-Ir as anode,cerous nitrate and ammonium nitrate as electrolyte.

以钛基钌-钇-铑涂层电极作为阳极，硝酸铈和硝酸铵作为电解液，电化学法制备二氧化铈超细粉体，用X射线衍射和透射电镜进行了表征，制备条件用正交实验设计进行优化；通过极化曲线，计算了电极过程动力学参数

The optimum condition of preparing process were obtained: the amount - of - substance ratio of sodium hydroxide and eerie sulfate tetrahydrate was 4.8:1 ,the quantity of PEG was 8 mL in reaction and 7 mL in washing, absolute alcohol was 10 mL in washing, irradiation time was 6 min, constant microwave irradiation pressure was 0.14 MPa, microwave power was 232 W, the ultrasonic wave dispersing time was 10 min and the microwave drying time was 10 min.

通过考察制备过程中的各个影响因素，得到了制备纳米二氧化铈的最佳工艺条件：氢氧化钠与四水硫酸高铈物质的量比为4.8：1；聚乙二醇的反应用量为8mL，洗涤用量为7mL；无水乙醇的洗涤用量为10mL；微波恒压时间为6min；微波压力为0.14MPa；微波功率为232W；超声波分散时间为10min；微波干燥时间为10min。

The geometric and electronic structures of the unreduced and reduced Pt-doped ceria with different doping concentration are systematically studied using the first principles method based on the density functional theory with the inclusion of on-site Coulomb interaction.

本文用基于密度泛函理论的第一性原理方法，并考虑了Ce4f电子的在位库仑作用（on-site Coulomb interaction），计算并分析了不同浓度金属Pt掺杂对二氧化铈原子结构、电子结构和化学特性的影响。

Cerium dioxide ultrafine powders were prepared by electrochemical method using composite coating of Ru, Ir and Rh as anode, and Cerium nitrate and ammonium nitrate as electrolyte.

采用钛基钌铱铑复合涂层作为阳极，以硝酸铈和硝酸铵作为电解液，电化学法制备二氧化铈超细粉体。

Fancy gold-plated dangling earrings with facetted White Opal crystals.

花式镀金悬垂耳环与facetted白欧泊水晶。

This essay chooses the study aim from biology teachers in middle school in Shi Jiazhuang which tells us that most of the middle school biology teachers in Shi Jiazhuang have the"burnout", lower successfulness, individualize.

本文选取石家庄市初中生物教师作为研究对象，运用问卷调查的方法对石家庄市初中生物教师职业倦怠的现状进行调查，调查结果发现，石家庄市初中生物教师这一群体普遍存在职业倦怠，情感枯竭程度偏高，成就感偏低，去个性化程度最为严重。