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And then the effects of compositions on the mechanical performance, characteristic temperatures, thermal expansion and chemical stability of the glass were discussed. Researches on lead borate sealing glasses show that PbO/B2O3 ratio exerts the most important effect on glass network. ZnO is beneficial to stabilize the glass against devitrification . Bi2O3 has little effects on the sealing temperature, while it helps to adjust the thermal expansion coefficient of lead borate glasses in a definitive range. When 0.5~4 mol% GeO2 is introduced, the glass possesses the highest stability and lowest sealing temperature (400 ?C), which is desirable for low-temperature sealing.

通过对含铅的硼酸盐封接玻璃研究得出,PbO/B2O3比是影响玻璃网络最主要的因素;添加ZnO有助于增强玻璃的稳定性,抑制析晶;Bi2O3对高铅系列配方玻璃的封接温度影响不大,但可使铅硼系列玻璃体系的热膨胀系数在一定范围内可调;在高铅系列配方中,引入0.5~4mol%的GeO2可有效地抑制玻璃析晶,降低封接温度;最终获得了两种性能较好的低熔点铅硼酸盐封接玻璃配方,G3封接温度低达400℃,其PbO含量为54mol%左右,BL10玻璃的封接温度为440℃,但其铅含量大大降低,仅为36mol%。

The results show that the visible light response of the natural sphalerite sample results from the presence of substituting metal ions.

分析结果认为,天然内锌矿良好的可见光响应性能主要源自其晶格内丰富的类质同像替代离子。

XRD indicated that the replacement of the terephthalate anion by the polytungstate anion had little effect on the structure.

结果表明,经过同多钨酸根阴离子的交换以后,垂直于水滑石层板方向的平行层板方向的晶格参数值变小,平行层板方向的晶格参数值不变,(003)、(006)、(009)衍射峰处的层间距值比为3:2:1;交换过程没有改变水滑石的结构,水滑石原位生长在γ-Al2O3表面及内孔,比表面积由γ-Al2O3载体的219m2/g增加到247m2/g,孔径分布则由原来的2~11nm变化为3~4nm。

XRD indicated that the replacement of the terephthalate anion by the polytungstate anion had little effect on the structure.

结果表明,经过同多钨酸根阴离子的交换以后,垂直于水滑石层板方向的平行层板方向的晶格参数值变小,平行层板方向的晶格参数值不变,(003)、(006)、(009)衍射峰处的层间距值比为3:2:1;交换过程没有改变水滑石的结构,水滑石原位生长在γ-Al2O3表面及内孔,比表面积由γ-Al2O3载体的219平方公尺/g增加到247平方公尺/g,孔径分布则由原来的2~11nm变化为3~4nm。

The invention provides a preparation method of small crystal SAPO-43 molecular sieve, which is characterized in that: the stepwise procedures are adopted to synthetize SAPO-43 molecular sieve, temperature-rising rate in different temperature phase during crystallization is controlled, so that the synthetized SAPO-43 molecular sieve has small particles, even crystal particles, short crystallization time, and reduce the amount of templates greatly, thereby reducing environmental pollution.

本发明的目的是提供一种小晶粒SAPO-43分子筛的制备方法。本发明的特点在于它是采用分阶段程序升温来快速合成小晶粒SAPO-43分子筛。通过对晶化过程中不同温度段内升温速率的控制,从而实现了合成的SAPO-43分子筛晶粒小,晶粒尺寸分布均匀,晶化时间短,且大大的降低了模板剂的用量,从而减少了对环境的污染。

When the undrawn films were annealed atthose temperatures, the morphologies in the lamellar crystals had change. WAXDand iR studies shown that the crystallinities incrcand, dimensions in (002) and(020) normals increased while that in (200) fold had slight decreases. The rela-tionship between the orientation of the drawn UHMWPE gel-films and the struc-ture changes and the optimum drawing temperature had been disscussed.

通过IR及X-ray衍射等方法研究发现,拉伸前用不同温度退火处理后,凝胶膜的片晶微结构产生明显变化,在对应于超高拉伸温度范围内,其结晶度增加,微晶的c和b轴方向尺寸变大,而a轴方向的尺寸减小,从理论上对这一变化过程作了考察,并讨论了超高拉伸取向性与这些结构变化的关系以及可超拉伸取向性的最佳温度范围。

When the vials are full of Ar with previous vacuumize, the final milling product is disorder nanocrystalline Fe-Cr solid solution with ferromagnetism similar to the bulk alloys.

球磨50h,形成了bcc结构的顺磁性纳米晶Cr-Fe-V合金。在富Cr的合金成份内,Fe含量越高,生成均质的纳米晶Fe-Cr-V合金所需的球磨时间越长。

The percentage of active transmission of small brown plant hopper varied with the infection stage of RBSDV in maize cell while the nymph acquiring feeding. There were 2.93% and 7.83% of viruliferous rate resp

用灰飞虱无毒若虫在细胞内病毒基质出现和病毒增殖期饲毒的,到成虫时分别有2.93%和7.83%个体传毒率;在细胞内病毒成串分布于管状结构和晶格状聚集排列期饲毒的,到成虫时均不能传毒。

The cells full of crystals observed in orient tobacco were verified to be crystal idioblasts. The crystals observed by SEM were multiangle.

研究表明,香料烟株内结晶细胞是一类特化的含晶细胞,细胞内充满晶体,晶体形状似角锥状,质体等被挤到细胞边缘。

Self-fluxing Fe-Cr-Ni-B-Si alloy prowders are laser clad on medium carbon steel substrate of dimensions 80×35×10mm〓. The investigation results of this clad layer are: micro-defects, micro-cavity and occluded forin substance, are the micro-cracks and crack resourses in clad layer; crack of coating propagates along the boundary of two kinds of eutectic sutructure; The included angle θ between the cracking direction and laser scanning direction in multitrack overlapping clad is smaller than that in one-track clad because of crack propagating along crystalline growth direction and crystalline direction in overlapping zone being different from it in one-track clad.

在调质态的45〓钢表面,采用预置粉末法进行FeCrNiBSi合金的多道搭接激光熔覆,对其熔覆层进行分析表明:多道搭接激光熔覆层裂纹扩展方向与激光扫描方向间的夹角θ与单道熔覆时相比明显变小,前者θ0°,后者θ角基本都为90°,这主要是因为多道搭接时,搭接区结晶方向发生了变化以及裂纹沿结晶方向扩展所致;激光熔覆层裂纹大多是以覆层与基材交界面的孔洞、熔覆层内不同方向共晶团间的显微缩孔、夹杂物的边界等三种显微缺陷作为裂纹源,并沿低熔点物相形成元素偏析造成弱化膜的共晶团界面扩展延伸。

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