查询词典 Si

The influence of alternating current magnetic fields on the solidification structure of hypoeutectic Al-7%Si alloy was studied.

中文摘要：研究了在交流磁场下凝固的Al-7%Si合金晶内Si溶质元素含量及凝固组织的变化。

The alloys are hypoeutectic in the range of 2-8%Si,which distributed in both α-Fe and Fe_2B phases.

当Si含量为2-8%wt时，Fe-2.5B-XSi是亚共晶组织，Si分布在-αFe和Fe2B相中。

The preliminary results show that the peak of HSiO〓 with the baseline width of about 4ppm in 〓Si-NMR spectrum is getting narrower, which shows that the regularity of the ladderlike polymer is further improved.

初步结果发现〓Si-NMR谱中代表梯形主链上Si原子峰的基线宽度降低到4ppm，表明梯形聚氢基倍半硅氧烷的规整性有进一步提高。

Molal contents of alkalescence component and alumina showed in the Seger-formula were similar to each other in the same series. Mixture of materials was melted at 1 270～1 290 ℃, and treated with heat preservation in the range of crystallization temperatures (at 1120 ℃) for 25 minutes. Results showed: if CaO/MgO≈1, crystallate was melilite when O/Si was cl...

结果显示：CaO/MgO≈ 1时，O/Si值近于3 。1时析出钙镁黄长石，在 3左右同时出现黄长石和透辉石，小于 3为透辉石，继续减小开始产生少量硅灰石；CaO/MgO≈0 。5时，O/Si值大于 3 。1时同时形成钙镁黄长石和透辉石，近于 3时仅出现透辉石。

They are the easy nitridation of Si surface and the poor wetting properties of GaN on Si substrate.

采用低温生长GaN缓冲层，随后进行高温GaN生长的&两步生长法&，对Si上GaN的生长进行了深入系统的研究。

The relationship of the nitridation rate of Al-Mg-Si alloys with temperature from room temperature to 1300℃ was investigated by TG experiments.

通过程序升温法热重实验，考察了Al-Mg-Si合金从室温至1300℃范围氮化反应速率随温度的变化规律，实验验证了Al-Mg-Si合金的直接氮化符合阿累尼乌斯公式。

Si alloy thixotropic deformation behavior has been established. Phenomenologically, An internal variable framework effectively combines the microstructure level structural kinetics with the maroscopic flow behavior.

采用自制的半固态合金固液两相区力学性能测试装置进行半固态Al-7.0％Si合金的触变力学性能的研究，建立了半固态Al-7.0％Si合金触变变形行为的幂律模型。

29Si NMR spectra indicate that SAPO-11 sample with an Si/Al of 0.33 significantly enhances the neighboring region between SAPO region and Si region, and NH_3-TPD results also show it has higher strong acid/weak acid ratio.

33的SAPO-11的SAPO区与Si区的交界区明显扩大，与之对应的NH_3-TPD也表明有较高的中强酸/弱酸比例。

The results show that the SAPO–5 has a pillar-like morphology with the size of about 20 μm×5 μm×5 μm.The ratio of P:Al:Si is 1:1.19:0.67 in its crystal structure, the content of Si is high. The total acidimety fo the SAPO–5 is 578.0 μmol/g , hihger than that of prepared by one step crystalline hydrothermal method.And its initial catalysis character performance on normal butane isomerization reaction reach 24.8 %, higher than that of prepared by one step crystalline hydrothermal method.

实验结果表明：产物为柱状的磷酸硅铝分子筛，其晶粒尺寸大约为20 μm×5 μm×5 μm，其晶体结构中P：Al：Si＝1：1.19：0.67，硅含量较高；采用分段晶化方式制备的SAPO-5分子筛的总酸量为578.0 μmol/g高于一段晶化方式制备的SAPO-5分子筛的总酸量；采用分段晶化生成的SAPO-5分子筛的催化正丁烷异构化反应初始活性可达到24.8 %，远高于一段晶化制备的SAPO-5分子筛的初始活性14.1 %。

The differences in the diffusion ability of Si in the common and rapid solidifiable Al-Si brazing metal were preliminarily investigated and discussed.

实验结果表明，普通钎料和快冷钎料中Si元素在母材基体中的扩散过程基本相同。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。