晶粒

A new method dispersed Si nanoparticles in the process of pulsed laser ablation was proposed in this paper.

提出了一种将激光烧蚀制备的纳米Si晶粒按尺寸大小进行分离的新方法。

In the study of microwave sintering of BaTiO〓 PTC ceramics, when the applied microwave power are above than a certain value, the abnormal axial shrinkage of the sintered sample will occur, by the analysis of SEM and XRD, it is found the microstructure and phase are different with conventionally sintered sample, the reason for this phenomenon is due to orientational grain growth by the action of electric field in the microwave sintering process.

微波烧结BaTiO〓电子陶瓷时，当所加的微波功率超过一定值时，首次发现烧结样品出现轴向异常收缩现象，采用SEM、XRD等分析发现其微观结构与常规烧结有巨大的差异，这是BaTiO〓材料的晶粒在微波场中受电场力作用而发生的取向生长造成的。

The donor impurity and grain boundary combustion-supporting agent containing acceptor impurity were added successively in the ceramic powder during ceramic powder preparation, both of them can also promote grain growing and semiconductive, and the combustion-supporting agent can be good to form insulation layer in oxidizing process.

采用一次性烧成技术研制了晶界层半导体陶瓷电容器，在瓷料配制过程中先后加入施主杂质和含有受主杂质的晶界助烧剂，两者在还原烧成时促使晶粒生长并半导化，助烧剂在氧化时有利于晶界绝缘层形成。

In regard to the highly non-linearity of the equations for recrystallisation fraction and grain growth,an effective time compensated by temperature is defined,by which the time additivity is reasonable and suitable for temperature-varying conditions.

针对再结晶动力学方程和晶粒长大方程对时间和温度的高度非线性，定义了一个经温度补偿的适用于变温过程的等效时间，解决了变温状态下对时间的叠加问题。

Nevertheless, the crystal size tends to agglomerate with the sintering time.

但是晶粒尺寸则受到烧结时间的延长而有增大的趋势。

In addition, high alkalinity and hydrogel were proved to be beneficial for small crystal FeZSM-5 formation.

其它合成因素对产品的粒度也有一定的影响，较高的碱度和凝胶配比浓度都有利于小晶粒分子筛的合成。

The grains of dynamic recrystallisation is obviously fine , and the mean size of recrystallisation grains increases with the decrease of temperature or value of Z(Zener-Hollomon parameter).

再结晶晶粒明显细化，晶粒尺寸随着温度或Z(Zener-Hollomon常数)值的下降而增大。

The results show that the plasticity zone and dynamically quiescent layer become fine equiaxed recrystallisation under the thermo-mechanical effect, the grains in the heat-affected zone grow up because of the effect of friction heat. When the rotation speed is 2 500 r/min and the welding time is 12 s, good joint is achieved, and the tensile shear strength of the joint reaches 9.24 kN. The tensile shear strength of spot increases with increasing tool rotation speed, with increasing welding time, the strength increases first, while then reduces. The microhardness of plasticity zone is high, but is slightly lower than that of the base metal, the minimum value of microhardness is in the heat affected zone. When the energy input of joint is high, the fracture type of spot is mode Ⅰ, and the tensile shear strength is high; on the contrary, when the energy input of joint is less the fracture type of spot is mode Ⅱ, and the strength is low.

结果表明：塑性区和动态静止层的晶粒在热和力作用下发生动态再结晶形成细小的等轴晶，热影响区的晶粒在摩擦热作用下长大变粗；搅拌头旋转速度为2 500 r/min，焊接时间为12 s时，可以获得力学性能较好的焊点，焊点的剪切强度达到9.24 kN；焊点的剪切强度随搅拌头旋转速度的增大而增大，随焊接时间的延长先增大后减小；塑性区的显微硬度较高，但略小于母材，接头显微硬度的最小值分布在热影响区；焊点热输入量较多时，接头为Ⅰ型断裂，焊点的剪切强度较高；焊点热输入量较少时，接头为Ⅱ型断裂，焊点的强度较低。

The tailorable biodegradation of calcium phosphates composite powders can be effectively improved with the composite powders containing nanostructured clusters, in which the different phases exist in uniformly.

按生物环境下磷酸钙实际降解过程的要求，不同晶相的晶粒应形成一个纳米结构化的团簇（即在几百纳米范围内各相均匀分布的纳米晶粒团聚体），这样才能有效地发挥出复相调节生物降解速率的效能。

Constant temperature bath was employed to get the curve of forward current and temperature, which will be the basis of forward current feedback and temperature conversions. Self-developed driving circuits were used to control LED to make the relative illumination decays to be less than 5% and the coordinate excursion of Color rendering indix on the CIE chromaticity diagram is lower than 0.1. The development of circuit control of LED projection light with low aberrance of illumination and Color rendering indix, changing with the temperature can be successfully realized.

研究执行首先针对各类LED单体，进行晶粒温度对前馈电流变化之量测，利用恒温槽控制得出完整曲线，并以此作为LED晶粒前馈电流回授与温度换算之依据，利用自行开发脉波驱动线路，进行高瓦特LED单体控制，达成相对照度变化小於 5%，演色性在CIE chromaticity diagram上座标偏移低於0.1，成功实现一随温度变化，照度与演色性变异均低之LED投射灯控制线路开发。

Fancy gold-plated dangling earrings with facetted White Opal crystals.

花式镀金悬垂耳环与facetted白欧泊水晶。

This essay chooses the study aim from biology teachers in middle school in Shi Jiazhuang which tells us that most of the middle school biology teachers in Shi Jiazhuang have the"burnout", lower successfulness, individualize.

本文选取石家庄市初中生物教师作为研究对象，运用问卷调查的方法对石家庄市初中生物教师职业倦怠的现状进行调查，调查结果发现，石家庄市初中生物教师这一群体普遍存在职业倦怠，情感枯竭程度偏高，成就感偏低，去个性化程度最为严重。