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Metal/ oxide composite aerogels can be used as catalysts because of their high specific surface area. In this paper, Co-rich Co/SiO2 composite aerogels in which mass fraction of Co can reach 66%were firstly prepared by sol - gel process of Co-containing tetraethyl orthosilicate. The influence of H2O, catalyst, solvent and composition of Co-containing tetraethyl orthosilicate on the sol-gel process are discussed.

本工作首次采用含钴硅酸乙酯进行溶胶～凝胶反应来制备高钴含量的纳米级Co/SiO2复合气凝胶，制备的Co/SiO2复合气凝胶中n：n的比例最高可达2：1，且复合气凝胶中的Co含量可在小于66％的范围内任意调节，并系统研究了水量、催化剂浓度、溶剂量及含钴硅酸乙酯的组成对溶胶-凝胶过程的影响。

Stable and transparent boric silicate、Er~(3+)-doped phosphosilicate, Er~(3+)-doped aluminasilicate glass sol was prepared by the sol-gel route.

实验中采用溶胶-凝胶工艺制备了透明、稳定的硼酸盐、掺铒的磷硅酸盐、掺铒的铝硅酸盐溶胶。

The effects of the sol viscosity,mass ratio of buty1 titanate to active carbon, TiO 2 content of the sol and heat-treatment temperature on the photoactivity of TiO 2/AC composites were studied.

研究了TiO 2溶胶黏度、钛酸丁酯与活性炭的质量比、溶胶中TiO 2的量及热处理温度对TiO 2/ AC 复合体光催化活性的影响。

The objective in this study is to reduce the aggregate phenomenon of SiO2-sol and improve the storage/release thermal properties of the composite phase change materials. Silicane coupling agent was used to modify the SiO2sol during preparing CPCMs by sol-gel method.

为改善溶胶－凝胶法复合相变材料过程中硅溶胶易团聚的问题，采用硅烷偶联剂对SiO2溶胶进行改性，提升复合相变材料的热储、放性能。

The results show that the zirconium sol has good spinnability when n: n= 1:3, reaction time is 6h and aging temperature is 15℃. The ZrO_2precursor fibers are made from hydrous zirconia chelated by acetylacetone. The sintercd fibers arecomposed of metastable tetragonal phase and sized about 15μm in diameter. Moreover, there aremany pores inside the fibers, but no cracks.4. ZrO_2/PVP hybrid fibers were prepared by blending the spinnable zirconium sol and 10 wt%PVP solution.

结果表明，当n(ZrOCl_2·8H_2O)：n(H_2O_2)=1：3，反应时间6h，陈化温度15℃时可得纺丝性能良好的锆溶胶，ZrO_2前驱体连续纤维的组成主要为经乙酰丙酮配位的ZrO_2水合物，热处理后的ZrO_2纤维的相结构为亚稳四方相，纤维的直径为15μm左右，纤维中存在大量的纳米级气孔，但无明显裂纹。4。

ML/min,the end of reaction(pH=7).These precipitates were then peptized with peptizator HAc at 80 ℃ for 12 h. So a stable transparent colloidal sol was obtained.By using this sol,splinterless La2O3-Al2O3 membranes were prepared.

mL/min、反应终点(pH=7)，加入HAc作胶溶剂，于80 ℃恒温胶溶12 h，可制得稳定、透明的溶胶，用该溶胶可制得无开裂的La2O3-Al2O3膜。

In the preparation of tungstenic acid sol, H_2O_2 and ethanol can make the sol become more stability.

在钨酸溶胶的制备中，H_2O_2、乙醇的加入能增强钨酸溶胶的稳定性，当H_2O_2与钨酸的摩尔比为1：2，乙醇与钨酸体积比为1：2时，溶胶的保存时间较长，成膜质量较好。

The microstructure and morphology are examined by SEM, XRD, EPMA, and the electrochemical performance is studied by potentiodynamic polarization and current efficiency. The results show that the alloy elements in the electrode coating prepared by the sol-gel process are well distributed, more sufficient to form solid solution and with higher current efficiency than by the traditional thermal decomposition process. The deactivation effect is due to the forming of unconductive TiO2 for the sol-gel process, but due to the dissolution of active composition for the thermal decomposition process.

SEM、XRD、电子探针、极化曲线、电流效率实验表明，由溶胶-凝胶法制备的氧化物涂层比热分解法制备的氧化物涂层的分散性好、形成固溶体充分、电流效率高；由溶胶-凝胶法制备的氧化物涂层的失效是由于生成不导电的TiO2引起，而由热分解法制备的氧化物涂层的失效是由于活性氧化物涂层的溶解引起。

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。

The results indicate that in the same reaction conditions the powders prepared by ammoniated silicon sol had smaller pellet diameter and bulk density than the direct sol-gel handling metho...

结果表明：采用氨解硅溶胶方法制得的原料粉末比直接溶胶-凝胶方法制得的粉末颗粒直径细小，团聚松散，堆积密度小。在同样合成条件下前者反应获得的碳化硅的转化率高，晶须含量高，质量好。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失