查询词典 al

Meanwhile, the theoretical hypotheses about the heterogeneous nucleation ofα-Al on borides are controversial and disagree with the experimental phenomena in grain refinement.

同时，由于对α-Al/异质核心界面的研究深度不够，尽管目前存在多种α-Al晶粒细化机理模型，但是不同理论假说分歧严重，且与实验现象存在矛盾。

It is more hard to be acid-depolymerized and contains more species that cannot be depolymerized and complexed by Al-Ferron method.

结果表明，PEO的引入使碱滴定过程中Al的水解聚合过程提前，所制得的改性PAC抗酸性增加，含有更多的不能被Al-Ferron方法所解离-络合的形态，在室温下存放更为稳定。

The results show that the best sintering process for SiC preform is 1100℃, 8 h in vacuum, by which the open porosity is 99.6% and the preform strength reaches 0.57MPa. The thermo-physical characteristics of 57% SiC/Al composites produced by this technique are as follows: the relative density is 98.7%; the thermal expansion coefficient is 7.5×10^(-6)℃^(-1) which almost matches those of GaAs and BeO; the thermal conductivity is 1.65×10^5W/K, which corresponds to that of Cu(15%)/W and decuples that of Kovar alloy; the density is close to that of aluminum and less than that of one fifth of Cu/W.

结果表明：经1100℃真空烧结8h的SiC预成形坯开孔率可以达到99.6%，抗压强度为0.57MPa；所制备的57%SiC/Al复合材料相对密度为98.7%，热膨胀系数为7.5×10^(-6)℃^(-1)，与GaAs、BeO的接近，热导率为1.65×10^5W/K，与传统Cu(l5%)/W相当，是柯伐合金的10倍，在密度上接近Al，不到Cu/W的1/5。

The results show that the best sintering process for SiC preform is 1100℃, 8 h in vacuum, by which the open porosity is 99.6% and the preform strength reaches 0.57 MPa. The thermo-physical characteristics of 57% SiCp/Al composites produced by this technique are as follows: the relative density is 98.7%; the thermal expansion coefficient is 7.5×10-6 ℃-1 which almost matches those of GaAs and BeO; the thermal conductivity is 1.65×105 W/K, which corresponds to that of Cu(15%)/W and decuples that of Kovar alloy; the density is close to that of aluminum and less than that of one fifth of Cu/W.

结果表明：经1 100 ℃真空烧结8 h的SiC预成形坯开孔率可以达到99.6%，抗压强度为0.57 MPa；所制备的57％SiCp/Al复合材料相对密度为98.7％，热膨胀系数为7.5×10-6 ℃-1，与GaAs、 BeO的接近，热导率为1.65×105 W/K，与传统Cu(15%)/W相当，是柯伐合金的10倍，在密度上接近Al，不到Cu/W的1/5。

The experiments of TPD show that the adsorption of SO〓 on the surfaces of γ-Al〓O〓 and catalysts favors the formation of NO oxidative adsorption species which can desorb NO〓 at higher temperatures.

Pt/γ-Al〓O〓和NiO/γ-Al〓O〓上的DRIFT实验表明，NO-O〓在两种催化剂上形成的吸附物种有所不同。室温吸附NO-O〓时，前者表面上的硝酸盐物种较少，硝基或亚硝酸盐物种较多；后者则相反。

The dopings by Al and V had significant effects on the thermoelectric transport performances and could increase the thermoelectric properties of the CrSi_2 single crystal greatly.

Al或V置换掺杂对CrSi_2单晶的热电传输性能有重要的影响，在研究的温度范围内，Al或V置换掺杂会提高CrSi_2单晶的热电性能。

The test of ZL109 refined respectively by ribbon and rod Al-Ti-B master alloy shows that: the refining effect of ribbon Al-Ti-B is better than rod...

分别用薄丝带状和杆状Al-Ti-B中间合金对ZL109进行细化处理时发现：薄丝带状细化剂比杆状细化剂的细化效果好，使ZL109的力学性能有了进一步的提高，抗拉强度提高32.9%，断后伸长率提高15.6%，硬度提高5.69%。

There are no prominent variations of the micas in Li, F, Mn and Rb between zone c and zone d but sharp changes in these elements between zone d and zone e. In contrast to the primary micas in zone e, the altered micas in zone e show higher in F and Li but lower in Al. From zone a to zone e, the micas do not show remarkable variation in Na+K.

从c带到e带，随着Fe、Mg和Ti的减少，总体上表现为Al、Li递增，F、Mn和Rb递减的演化方向，但Li、F、Mn和Rb在c带和d带之间变化不明显，d带和e带之间却表现出急剧的变化。e带中的次生云母与原生云母相比，前者F、Li高而Al低，从a带到e带，Na+K变化不明显。

With the increase of the mischmetal addition,Ce and La prefer the formation of Al Ce and Al La compounds to be accumulated to grain boundary with the prevention of grain from growth resulting in grain refinement.

虽然过热处理对Mg Al系合金有明显的细化效果，但由于镁合金熔体温度的升高，使得氧化和吸气现象严重，结果反而降低了镁合金铸锭的品质[2 ] 。

Establishment of non-contact nanoscale measurement of local electrical properties (local charge and local electric field).The local electron concentration of N atom in Al_xGa_(1-x)N with different Al mole fraction were calculated and the concentration was found to increase with the increase of Al fraction.

利用第一性原理方法分别计算了不同Al组分的Al_xGa_(1-x)表面的N原子周围局域电子密度和相应的态密度，模拟不同电子密度N KVV论俄歇价电子谱主峰强度N_与次峰的N_的比值，发现了比值随电子密度的增加而线性增加的现象。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。