硅元素

Glassiness SiO2 layer is formed on the surface of coatings after exposure long time,which can isolation of oxygen and fills in interstice on the surface of coatings.

采用加入其他元素的方法使硅化铌改性可达到减少穿透硅化铌涂层微裂纹的生成和降低铌基材氧化速度的目的，但使用温度一般不超过1 300℃[1~3]。

To minimize the contamination of detrimental elements such as sulfurand chlorine, a two-step sol-gel process was successfully developed to synthesize SiC precursors with oxalic acid and hexamethylenetetramine HMTA as the catalysts, which are free of sulfur and chlorine. Tetraethoxysilane TEOS and phenolic resin were used as the silicon source and carbon source, respectively.

为了尽量减少硫、氯等有害元素的含量，本文用不含有害元素的草酸和六次甲基四胺HMTA为催化剂，正硅酸乙酯TEOS为硅源，酚醛树脂为碳源，成功探索出了制备SiC前驱体的两步法溶胶-凝胶工艺。

In this research project, we have got a series conclusions:(1) there is no excess argon in the high-pressure white micas being in the orthogneiss;(2) The distribution of excess argon in eclogite is positive correlative with the ratio of Mg/, but negative with the ratio of Na/;(3) The in-situ analyses by using the method of laser probe 39Ar-40Ar show that the age radius from central to margin in a single grain of high-pressure white mica in eclogite;(4) There is no any evidence to prove that the excess argon in eclogite comes from fluid;(5) The excess argon in eclogite inherited from primitive rock during high-ultra high pressure metamorphism;(6) There is no excess argon in the eclogite when its surrounding rock is carbonate.

本项目用综合手段，研究了高压白云母中过剩氩的来源、赋存、分布与岩性、产状、矿物元素和矿物显微结构之间的相关关系，以确定过剩氩在高压白云母中赋存的主要控制因素。初步得出了以下结果：1、高压变质的正片麻岩中的白云母中不含过剩氩；2、高压白云母中过剩氩的赋存和Mg/有着正相关关系，而和Na/呈负相关；3、激光微区氩-氩分析表明，榴辉岩中的单颗粒多硅白云母存在年龄梯度；4、初步否定了高压白云母中过剩氩来自于流体的说法；5、初步认定，榴辉岩中多硅白云母中过剩氩主要是在高压-超高压变质过程中由内部继承的；6、在阿尔金及柴北缘等地围岩为碳酸岩的榴辉岩中的高压白云母不含过剩氩。上述研究结果将推动过剩氩成因研究走向深入。

The influence of conventional phosphonate mineral scale inhibitors on the deposition of colloidal silica was studied.

硅是地球上含量最丰富的元素之一，也是水环境中最常见的胶体物质[1]，在水中硅的溶解度通常在150～180mg·L-1之间[2]。

Geochemical study indicates that constant elements, microelements and trace elements in manganese ores and protore wholly take on thermal sedimentary characteristics, the siliceous limestone, silica-bearing limestone and bioclastic limestone is predominant protore beds of manganese-capped ores.

通过对锰矿石和矿胚层岩石中常量元素、微量元素及稀土元素等地球化学的研究，均具有热水沉积的特征，硅质灰岩、含硅质灰岩和生物碎屑灰岩是锰帽型矿石最主要的矿胚层。

Compound 1 and 2 are pure tungstosilicate cluster,the others are transition-metal tungstosilicate clusters All compound characterized by elemental analyses,IR,TG,and single-crystal X-ray diffraction..

其中，前两个化合物为纯硅钨簇，后三个化合物为含有金属的硅钨簇。所有的化合物都通过元素分析，IR，TG和单晶X-射线分析进行了表征。另外，对于化合物3、4和5，我们还对其电化学性质进行了研究。

Sequential leaching experiments indicate fluorine in carbonate rock, phosphorite and Mo-Ni ore layer occurs principally in dissolvable forms: water-soluble, associated with carbonate or phosphorite, so fluorine in which rocks have high chemical mobility at surface conditions. Fluorine in siliceous rock, black shale and carbonaceous slate mainly occurs in undissolvable forms, which are inert at surface conditions.

氟在碳酸盐岩、磷块岩、钼、镍等多元素富集层及部分硅质岩中主要以水溶态、碳酸盐结合态等易溶形式存在，其在自然条件下的化学活动性强；而氟在碳质板岩、黑色页岩及大部分硅质岩中主要存在于难溶矿物中，其化学活动性较弱。

A brief introduction is made to the geologic feature of the mine and region, and it is summed up that the granodiorte, silicified zone and geochemical anomaly of As are three prospec...

本文简要地介绍了区域和矿区地质特征，总结出花岗闪长斑岩，硅化带和As元素化探异常等3条找矿标志，建议在该区开展大比例尺化探测量和地质填图，普查北西向硅化断裂破碎带，并对石子坳含金破碎带进行深部验证，寻找隐伏金矿床。

A method for the determination of silicon and phosphorus in antimony oxide by inductively coupled plasma emission spectrometry ICP-AES was reported. he sample dissolution methods, election of spectral lines, interference of coexistent elements and the working parameters of the instrument were studied.

通过对氧化锑试样分解方法、硅磷分析线选择、共存元素光谱干扰和仪器最佳分析条件等方面的研究，建立了电感耦合等离子体原子发射光谱法测定氧化锑中硅和磷的方法。

Silicone, made up of silicon, which is a natural element present in organic materials like sand, quartz and rock.

有机硅，硅组成的，这是一个像沙子自然元素的有机材料目前，石英和岩石。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。