结晶度

Pseudo-boehmite was prepared with nitric acid and sodium aluminate under the same precipitation conditions but different ageing and washing conditions. The influences of ageing temperature, ageing time and ageing media were studied. It was shown that pronging the ageing time and increasing temperature lead to improve crystallinity of PB., the pore diameter of PB can be increased after NH4HCO3 is added in the ageing medium.

在相同成胶条件下利用铝酸钠溶液和硝酸制备拟薄水铝石，而在不同条件下进行老化，研究了老化温度、老化时间及老化介质的影响，结果表明延长老化时间、提高老化温度和老化pH值有助于结晶度的提高，使用NH4HCO3等具有扩孔作用的溶液作为老化介质会降低产品的堆密度和增加孔径、孔容、比表面积。

The results show that alternatively distributed HA and TiO_2 in the bond coat adhere tightly to each other with less microcracks formed. The heat treated HA/(HA+TiO_2) coating is completely crystallized with less and finer opened microcracks on coating surfaces.

但等离子喷涂后，HA涂层的羟基丧失会改变其原有成分、晶格结构和生物活性，引起结晶度降低，以及金瓷界面、种植体骨界面的存在，使HA涂层种植体植入后可能会出现涂层分解、吸收或剥离[4] 。

In this experiment,X-ray diffraction apparatus was used forthe first time to examine and research on microdensity,crystallinity and microfibril angle.Through research on the radial variation of bamboo microdensity,this paper points out the conceptions of bamboo hull density and bamboo pulpdensity,and this provides basis for the multiple layer utilization of bamboo.Using computer image-processing technology to carry on precise examinationvolume fraction of bundle sheath,that is key factor to reveal the relationshipbetween bamboo structure and properties.For the first time using resonantvibration means to test the dynamic elastic module,the result shows very ideal.And for the first time researched on the variability of electric conductivityproperty of bamboo.

在本次实验中，首次使用X射线衍射仪对竹材的微密度、结晶度、微纤丝角进行测定和研究，深入研究了竹材微密度的径向变异规律，首次提出竹青密度和竹肉密度的概念，为竹材的径向分层利用提供依据；首次使用微机图象处理技术对竹材的组织比量，主要是纤维束比量进行了精确测定，从而为揭示竹材结构与材性关系打下基础；首次使用共振法对竹材的动态弹性模量进行测定和研究，测量结果是比较理想的；首次研究了竹材导电性的变异。

The crystallinity of wet-spinning PAN precursor fibers gradually reduces during preoxidation process, while it gradually increases during carbonization process.

湿纺PAN原丝的结晶度在预氧化过程中逐渐降低，在碳化过程中随着碳化温度的升高逐渐增加。

The preparative technique of solid lubricant is cold-press sintering method.The micro-structure , friction surface, lubricant transfer film surface of base material was characterized by SEM; XRD was used to do phase analysis. The degrees of crystallinity of pure PTFE under the different conditions of water cooling, air cooling and furnace-varying cooling were made comparison by XRD. The thermal stability of pure PTFE and solid lubricant was analyzed by DSC-TG; The composition and valence state of elements in the surface of carbon fiber ,solid lubricant before and after friction test and lubricant transfer film were characterized by XPS; The frictional property of solid lubricant was tested by pin and disk test rig .

用SEM表征原料微观结构、摩擦表面及润滑转移膜表面形貌：用XRD进行原料物相分析，及比较水冷却、空气冷却、随炉冷却三种工艺条件下的纯聚四氟乙烯树脂的结晶度；用DSC-TG分析纯聚四氟乙烯树脂及固体润滑剂的热稳定性；用XPS表征碳纤维表面、固体润滑剂摩擦前后表面、润滑转移膜表面的元素组成、价态变化；用销盘式摩擦磨损试验机对固体润滑剂进行摩擦性能测试；采用专用的台架模拟试验机对固体润滑剂镶嵌轴承套与钢轴摩擦副间的摩擦磨损性能进行测定；用莱次偏光显微镜测试固体润滑剂的硬度；用材料试验机测试固体润滑剂的抗压强度等。

The high dielectric constant, low dielectric loss and leakage current density may originate from the good Purity and crystallinity of the films.

较高的介电常数、较低的漏电流密度可能源于良好的纯度和结晶度。

2 Insulation draft tube shall use Teflon resin, in a manufacturing process with lower crystallinity.

6.1.2.2绝缘引流管采用聚四氟乙烯树脂以结晶度低的工艺制成。

Characterization of cotton fiber using solid-state ~(13)C-CP/MAS NMR spectroscopy shows that the crystallinity after MHT is lower than the original sample,but the cotton after MHT has a higher lateral orientation index,which has a good definition in C2,3,5 resonance region.~(13)C-CP/MAS NMR spectroscopy and X-ray diffraction reveal that cellulose I_βis the main cellulose in cotton,and microwave change the allomorphs content.

通过核磁共振碳谱表征分析可知，微波处理之后的结晶度要小于原样，但是由于微波处理之后的棉纤维有相当高的侧向有序指数，其在C2，3，5共振区域有更好的清晰度。X衍射和核磁共振均表明棉纤维是以纤维素I_β为主，微波处理改变了纤维素的晶型，晶型含量I_α和I_β均降低，但是比例基本保持不变，微波处理之后向次晶转化。

From electrom microscopy Pattern, The structure of the network was consisted of fibrils with different degree of orientation.

用Tsvankin-Buchanan SAXS方法计算了双拉PET薄膜的长周期，无定形层厚度，晶片厚度及一维结晶度。

Using infrared spectrum of heat stabilizers mechanism research shows that, after joining stabilizer, PVC crystallinity, stability.

采用红外光谱对热稳定剂机理研究表明，加入稳定剂后， PVC结晶度下降，稳定性提高。

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。