查询词典 TEOS

The effect of concentration of TEOS and ammonia on the composite particles structure was also investigated.

研究了TEOS、氨水的浓度对核－壳粒子结构的影响。

The comparison of hydrolysis-polycondensation reaction and microstructure of ORMOSILs derived by TEOS, MTES, VTES, ETES confirms that the influence of organic group such as methyl, vinyl, ethyl and ethoxyl on the hydrolysis and polycondensation reaction rate depends on several factors including electron-donating capability, size and number of ethoxyl group which can participates polycondensation reaction.

确认甲基、乙烯基和乙基和乙氧基等改性基团对硅醇盐水解-缩聚反应速度的影响是取决于有机改性基团的电负性、尺寸和可水解的-OR基团数目等因素综合作用的结果，其水解速度依MTES＞TEOS＞VTES＞ETES的顺序递减。由于Si原子上可聚合的基团数目减少，导致MTES、VTES和ETES的聚合反应速度降低，而与水解速率失配。

To minimize the contamination of detrimental elements such as sulfurand chlorine, a two-step sol-gel process was successfully developed to synthesize SiC precursors with oxalic acid and hexamethylenetetramine HMTA as the catalysts, which are free of sulfur and chlorine. Tetraethoxysilane TEOS and phenolic resin were used as the silicon source and carbon source, respectively.

为了尽量减少硫、氯等有害元素的含量，本文用不含有害元素的草酸和六次甲基四胺HMTA为催化剂，正硅酸乙酯TEOS为硅源，酚醛树脂为碳源，成功探索出了制备SiC前驱体的两步法溶胶-凝胶工艺。

The results indicated the highest yield of nano-meter sized SiC powders can be achieved when the mole ratio of de-ionized water to TEOS was 4: 1 and the saccharose was introduced after TEOS.

研究结果表明，当水解用水与TEOS的摩尔比为4：1，蔗糖在TEOS之后引入时，可以获得最高的纳米SiC产率。

SBA-15 samples obtained from both silica sources were highly ordered p6mm symmetric pillar structure,as was evidenced by XRD patterns,with similar surface area and slightly larger pore volume for the samples prepared from TEOS than those from sodium metasilicate.

通过X射线粉末衍射对样品进行表征，发现两种硅源合成的SBA-15都具有高度有序的二维六方立柱形结构。它们的比表面积相近，用TEOS作为硅源的SBA-15的孔容比用硅酸钠作为硅源的SBA-15的略大；用硅酸钠作为硅源的SBA-15有更高的微孔率和更厚的孔壁。

It shows that the superabsorbent hybrid material is ideal when the ratio of TEOS is about 5%.

结果表明，TEOS用量为5%左右制得的高吸水性杂化材料较为理想。

But when the molar ratio of TEOS:DDS is 1:1.25, the result materials are particles with different sizes.

当TEOS∶DDS=0.5时，得到的产物是相互粘连的、表面分布不均匀的体系。

The hydrolysis rate constant of TEOS in mixed systems was larger compared with TEOS in single precursor systems.

与单前驱体水解一致的是，在双前驱体系中TEOS和DDS自身的反应级数仍保持一级，但是氨和水的反应级数都有不同程度的增大。

The membrane micro-structure and its selectivity could be tailored by controlling the mole ratio of PTMOS to TEOS.

通过控制前驱物中的苯基的含量，即PTMOS／TEOS的比值，可以设计膜的结构和分离性能。

The poor endurance is ascribed to the poor quality of TEOS used for the tunneling oxide as well as the horn-shaped channel. The traps are easily generated because of poor quality of TEOS. Besides, high electric field due to the horn of the channel could seriously damage the tunneling oxide.

耐久性差的主要原因，是因为使用TEOS当作穿隧氧化层，而TEOS的品质较乾氧化层差，容易产生缺陷；再加上因为通道尖角造成的局部大电场会对穿隧氧化层造成极大的伤害，所以特性并不理想。

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。