硅

The experimental results show that the content of SiC in RBSC increases with carbon content while α-SiC is chosen as a filler. However, the residual carbon would appear in specimens when the carbon content exceeds 30% by weight. Using carbon felt, the reaction-formed SiC particles are small and uniform in size and distribution. However, when carbon felt is impregnated with phenol resin, the reaction-formed SiC is nonuniform in size and distribution. X-ray diffraction shows that the fabricated RBSC is composed of α-SiC,β-SiC, and free Si. The polytype of SiC is related to the reaction-heat during sintering.

结果表明：选用α-SiC+C粉的混合物作为生坯，SiC相的体积分数随生坯中wC的增加而增加，但过大的wC将使硅化后的试样出现残碳；选用碳毡作为生坯，反应烧结碳化硅的显微组织特点是C／Si反应生成的碳化硅颗粒均匀细小，并呈线状分布在游离硅中；浸渍过树脂的碳毡硅化处理后的显微组织特点是反应生成的碳化硅颗粒粗大且呈不均匀分布。X射线衍射结果也表明，反应烧结碳化硅陶瓷由游离Si、α-SiC、β-SiC组成，试样中不同晶型碳化硅的出现与C／Si反应的放热过程有关。

It is found that there is a mineral association, micro-crystal muscovite and phengite, in this deposit. The mineral assemblage contains about 80% micro-crystal muscovite and about 20% phengite. Their crystallinity is very high and their polytype is 2M1. Both of them are dioctahedral because the d and b of micro-crystal muscovite and phengite are 0.1502 nm, 0.9012 nm and 0.1505 nm, 0.9030 nm, respectively. For their d and b are larger than those of common muscovite, the reason why Fe(superscript 2+)+Fe(superscript 3+) and Mg(superscript 2+) are high in the ore is that Al(superscript 3+) in the octahedron is replaced by Fe(superscript 2+)+Fe(superscript 3+) and Mg(superscript 2+), and this is a phengite series mineral association formed through isomorphic replacement.

该矿物组合中的微晶白云母和多硅白云母结晶度高，多型为2M1，其含量分别为80%和20%左右；二者都属二八面体型白云母类矿物，但d060和b值偏大，微晶白云母的d060=0.1502nm，b=0.9012nm，多硅白云母的d060=0.1505nm，b=0.9030nm；微晶白云母矿铝含量较低、铁镁含量较高，其原因是白云母晶体铝氧八面体中的Al离子被Fe、Mg等离子所取代，这一矿物组合是通过矿物类质同象作用所形成一种多硅白云母系列矿物。

By means of a system of nutrient solution culture under greenhouse, the effects of different concentration of exogenous silicon on anti-oxidative system, reactive oxygen species, soluble protein and praline content, root activity and ion content in leaves and roots of Cabernet Sauvignon seedlings were investigated under salt stress condition (50 mM NaCl).

mM浓度的外源硅，研究了不同浓度外源硅处理对盐胁迫(50 mM NaCl)下赤霞珠幼苗叶片中抗氧化酶系统、活性氧代谢、可溶性蛋白质和游离脯氨酸含量，根系活力，根系及叶片中离子含量的影响，以期为外源硅在葡萄抗盐生产上的合理利用提供一定的理论依据。

The joining of graphite, ceramic SiC and C_f/SiC composites via preceramic silicone resin at high temperature (800~1400℃) was studied.

对先驱体硅树脂高温(800～1400℃)转化陶瓷接头连接石墨、陶瓷SiC及Cf/SiC复合材料进行了研究，着重对硅树脂固化裂解过程、硅树脂溶液浓度及裂解温度对连接性能的影响进行了探讨。

This article reviewes the recent progress in applied research of several typical preceramic polymers,including polycarbosilane,polysilazane,polysiloxane, polysilane ,etc,which were used in the preparation of ceramic materials.

概述了几种典型的陶瓷先驱体聚合物聚碳硅烷、聚硅氮烷、聚硅氧烷和聚硅烷等在陶瓷材料制备中的应用研究进展，重点阐述了在该领域所取得的研究成果，并针对目前存在的不足提出了今后的研究方向。

The joining of graphite,ceramic SiC and C_f/SiC composites via preceramic silicone resin at high temperature(800~1400℃) is studied.

对先驱体硅树脂高温(800~1400℃)转化陶瓷接头连接石墨、S iC陶瓷及Cf/S iC复合材料进行了研究，着重对硅树脂固化裂解过程、硅树脂溶液浓度、裂解温度及惰性填料对连接性能的影响进行了探讨。

In addition, silicon oxide nanotubes with a quadrate cross section also have been synthesized from the mixture of silicon and silicon monoxide powder.

实验中还采用一氧化硅和硅的混合物为原料，在未使用金属催化剂和模板的条件下，采用水热法制备出了方形氧化硅纳米管。

Oxidation-resistant silicide coatings on an Nb-based alloy were prepared by pack cementation technique. The holding temperatures were 1 050, 1 150 and 1 250 ℃ and the holding time were 2, 5, 10, 15 and 20 h, respectively.

摘 要：利用包埋渗法在铌基合金上制备抗氧化硅化物涂层，渗硅温度分别为1 050、1 150和1 250 ℃，渗硅时间分别为2、5、10、15和20 h。

Controversies occur in identifying silicified microbial structures. The simulated silicification experiment on extant bacillus was carried to benefit further understanding of microbial silicification fidelity.

硅化保存微体化石结构的识别和鉴定一直存在争议，现代人工模拟生物硅化实验有助于对硅化作用保真度等问题的理解。

It reveals that there are several types of phytoliths in bamboos including fan-shape, long-saddle, tower-shape, sinuate elongate, smooth elongate, silica stoma, silica hair and hair tip, among which long-saddle phytolith is diagnostic for Bambusoideae.

选择我国常见的竹亚科19属64种进行系统的植硅体形态学研究，对竹亚科特有的长鞍型植硅体的长度、宽度、高度和硅质颗粒数目等参数进行了测量。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。