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215619

Sigma-Aldrich

powder, −325 mesh, 99% trace metals basis

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About This Item

線性公式:
Si
CAS號碼:
分子量::
28.09
EC號碼:
MDL號碼:
分類程式碼代碼:
12141911
PubChem物質ID:
NACRES:
NA.23
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品質等級

化驗

99% trace metals basis

形狀

powder

粒徑

−325 mesh

bp

2355 °C (lit.)

mp

1410 °C (lit.)

密度

2.33 g/mL at 25 °C (lit.)

SMILES 字串

[Si]

InChI

1S/Si

InChI 密鑰

XUIMIQQOPSSXEZ-UHFFFAOYSA-N

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一般說明

硅粉是精细的灰色粉末。这款硅粉经过325目大小筛分,即粉末颗粒小到可以通过孔径约为44 mil(1 mil=千分之一英寸)的筛子。 硅是一种化学元素,为坚硬易碎的银灰色固体,具有高耐化学侵蚀性和高熔点。硅是地壳第二大丰富元素,存在于多种矿物中。

應用

硅可用作 锂离子电池的负极(anode)材料。

可用于制造Al2O3-C 耐火材料。 硅粉可制成β-Sialon晶须, 赋予耐火材料高温强度、 抗渣性和抗热震性。

硅粉可掺入高密度聚乙烯(HDPE)高分子复合材料,增强复合材料的热稳定性和热导率。

象形圖

Flame

訊號詞

Warning

危險聲明

危險分類

Flam. Sol. 2

儲存類別代碼

4.1B - Flammable solid hazardous materials

水污染物質分類(WGK)

WGK 3

閃點(°F)

Not applicable

閃點(°C)

Not applicable

個人防護裝備

Eyeshields, Gloves, type N95 (US)


從最近期的版本中選擇一個:

分析證明 (COA)

Lot/Batch Number

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Bo-Soon Kim et al.
Journal of nanoscience and nanotechnology, 13(5), 3622-3626 (2013-07-19)
A subwavelength structure (SWS) was formed via a simple chemical wet etching using a gold (Au) catalyst. Single nano-sized Au particles were fabricated by metallic self-aggregation. The deposition and thermal annealing of the thin metallic film were carried out. Thermal
Chengyong Li et al.
Journal of nanoscience and nanotechnology, 13(3), 2272-2275 (2013-06-13)
Mesoporous Si-C-O fibers were fabricated by air activation of a kind of carbon-rich SiC-C fibers at 600 degrees C. The SiC-C fibers were prepared from the hybrid precursor of polycarbosilane and pitch through melt-spinning, air curing and pyrolysis in nitrogen.
Seungil Park et al.
Journal of nanoscience and nanotechnology, 13(5), 3397-3402 (2013-07-19)
We investigated the thin film growths of hydrogenated silicon by hot-wire chemical vapor deposition with different flow rates of SiH4 and H2 mixture ambient and fabricated thin film solar cells by implementing the intrinsic layers to SiC/Si heterojunction p-i-n structures.
Jae Cheol Shin et al.
Journal of nanoscience and nanotechnology, 13(5), 3511-3514 (2013-07-19)
We have characterized the structural properties of the ternary In(x)Ga(1-x)As nanowires (NWs) grown on silicon (Si) substrates using metalorganic chemical vapor deposition (MOCVD). Au catalyzed vapor-liquid-solid (VLS) mode was used for the NW growth. The density of the In(x)Ga(1-x)As NW
Jaewoo Lee et al.
Journal of nanoscience and nanotechnology, 13(5), 3495-3499 (2013-07-19)
A spin-casting process for fabricating polycrystalline silicon sheets for use as solar cell wafers is proposed, and the parameters that control the sheet thickness are investigated. A numerical study of the fluidity of molten silicon indicates that the formation of

文章

An article concerning self-propagating reactions induced by mechanical alloying, presented by Sigma-Aldrich.com.

機械合金化是一種影響合金化學反應的 「粗暴 」方法。反應物粉末與數個球的混合物被放置在高能量球磨機的研磨罐中,例如震動式研磨機或行星式研磨機。

Recent demand for electric and hybrid vehicles, coupled with a reduction in prices, has caused lithium-ion batteries (LIBs) to become an increasingly popular form of rechargeable battery technology.

近期對於電動車和混合動力車的需求,加上價格的降低,使得鋰離子電池 (LIB) 成為越來越受歡迎的充電電池技術。

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相關內容

Li-ion batteries are currently the focus of numerous research efforts with applications designed to reduce carbon-based emissions and improve energy storage capabilities.

Questions

1–3 of 3 Questions  
  1. How can I determine the shelf life / expiration / retest date of this product?

    1 answer
    1. If this product has an expiration or retest date, it will be shown on the Certificate of Analysis (COA, CofA). If there is no retest or expiration date listed on the product's COA, we do not have suitable stability data to determine a shelf life. For these products, the only date on the COA will be the release date; a retest, expiration, or use-by-date will not be displayed.
      For all products, we recommend handling per defined conditions as printed in our product literature and website product descriptions. We recommend that products should be routinely inspected by customers to ensure they perform as expected.
      For products without retest or expiration dates, our standard warranty of 1 year from the date of shipment is applicable.
      For more information, please refer to the Product Dating Information document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/449/386/product-dating-information-mk.pdf

      Helpful?

  2. How is shipping temperature determined? And how is it related to the product storage temperature?

    1 answer
    1. Products may be shipped at a different temperature than the recommended long-term storage temperature. If the product quality is sensitive to short-term exposure to conditions other than the recommended long-term storage, it will be shipped on wet or dry-ice. If the product quality is NOT affected by short-term exposure to conditions other than the recommended long-term storage, it will be shipped at ambient temperature. As shipping routes are configured for minimum transit times, shipping at ambient temperature helps control shipping costs for our customers. For more information, please refer to the Storage and Transport Conditions document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/316/622/storage-transport-conditions-mk.pdf

      Helpful?

  3. Are individual particles single- or poly-crystalline?

    1 answer
    1. This silicon powder is polycrystalline in structure.

      Helpful?

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