硅化处理

It is prepared through preparing the materials including alpha-silicon nitride crystal whisker, deionized water as solvent, polyethylene imine as dispersant, PVA as adhesive, propylene glycol as plasticizer and ammonium tetramethyl chloride to regulate pH value; mixing; twice ball milling and post-treatment.

所述浆料的制备方法是：加入α-氮化硅晶须，以去离子水为溶剂，以聚乙烯亚胺为分散剂，聚乙烯醇作为粘结剂，丙二醇作为增塑剂；加入四甲基氯化铵来调节料浆的pH值；制备步骤包括配料、混合、两次球磨及后处理工序。

Microstructure-evolution of the silicon nitride ceramics sample during sintering process was investigated by a synchrotron radiation X-ray computed tomography technique. The projection images of the sample were obtained during the sintering process in real-time. 2-D and 3-D reconstructed images were obtained by treating the projection images of different sintering periods with filter back projection arithmetic and digital image processing methods.

利用同步辐射CT技术，在氮化硅陶瓷样品烧结过程中对其进行实时投影成像，并应用滤波反投影算法和数字图像处理技术，得到了样品在整个烧结过程中内部微结构演化的二维和三维重建图像，实现了对陶瓷固相烧结过程实时、无损的观测。

After the waste catalyst sample during silicon coupling agent synthesis was pretreated with this method, the platinum in sample was determined by tin dichloride spectrophotometry.

硅偶联剂合成中废催化剂样品用本方法处理后以氟化亚锡分光光度法测定铂含量，分析值重现性好。

Compared with the bulk Si3N4/SiO2 composite electret film before planar technology, the effect of the microminiaturization on the charge stability of this kind of electret film is also studied.

借助与未经平面工艺处理的氮氧化硅复合膜大片的对比，研究了这类驻极体功能膜的微型化对其电荷寿命的影响。

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。