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CN
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637238

Sigma-Aldrich

二氧化硅

nanopowder, 10-20 nm particle size (BET), 99.5% trace metals basis

别名:

二氧化硅

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About This Item

线性分子式:
SiO2
CAS号:
7631-86-9
分子量:
60.08
EC 号:
231-545-4
MDL编号:
MFCD00011232
UNSPSC代码:
12352302
PubChem化学物质编号:
24882839
NACRES:
NA.23

质量水平

100

检测方案

99.5% trace metals basis

形式

nanopowder

粒径

10-20 nm (BET)

bp

2230 °C (lit.)

mp

>1600 °C (lit.)

密度

2.2-2.6 g/mL at 25 °C

堆积密度

0.011 g/mL

SMILES字符串

O=[Si]=O

InChI

1S/O2Si/c1-3-2

InChI key

VYPSYNLAJGMNEJ-UHFFFAOYSA-N

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相关类别

一般描述

二氧化硅纳米粒子的折射率类似于聚合物涂层，因此它在纳米复合材料的制备中具有多种应用。热阻、电学和机械性能方面都得到了增强。二氧化硅纳米粒子可用于多种催化剂、颜料稳定、电子和传感器等领域。

应用

二氧化硅纳米粒子已被用于：
  • 研究SiO2纳米复合材料在弱光条件下的非线性光学性质。
  • 作为纳米复合海藻酸钙纤维中的纳米添加剂。
  • 作为液体聚甲基硅氧烷中的分散剂，其在低强度可见辐射场中表现出独特的光学非线性。

WGK

nwg

闪点(°F)

Not applicable

闪点(°C)

Not applicable

个人防护装备

dust mask type N95 (US), Eyeshields, Gloves

分析证书(COA)

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  1. Which document(s) contains shelf-life or expiration date information for a given product?

    If available for a given product, the recommended re-test date or the expiration date can be found on the Certificate of Analysis.

  2. How do I get lot-specific information or a Certificate of Analysis?

    The lot specific COA document can be found by entering the lot number above under the "Documents" section.

  3. How do I find price and availability?

    There are several ways to find pricing and availability for our products. Once you log onto our website, you will find the price and availability displayed on the product detail page. You can contact any of our Customer Sales and Service offices to receive a quote.  USA customers:  1-800-325-3010 or view local office numbers.

  4. What is the Department of Transportation shipping information for this product?

    Transportation information can be found in Section 14 of the product's (M)SDS.To access the shipping information for this material, use the link on the product detail page for the product. 

  5. Is Product 637238, Silica,crystalline?

    Our information indicates that product 637238 is amorphous.

  6. Does this product contain hydroxyl groups?

    We have not determined the presence of OH groups in this product, but it seems likely.  One can do FT-IR analysis on this product.

  7. What does "TEM" mean on the Specification Sheet?

    TEM stands for transmission electron microscopy.

  8. Have any papers cited use of Product 637238, Silica?

    One publication has specifically mentioned use of product 637238, in environmental research.

  9. My question is not addressed here, how can I contact Technical Service for assistance?

    Ask a Scientist here.

APS-silane modification of silica nanoparticles: effect of treatm,ent's variables on the grafting content and colloidal stability of nanoparticles
Journal of Coatings Technology and Research, 11(4), 651-660 (2014)
Unusual nonlinear optical properties of SiO2 nanocomposite in weak optical fields
Milichko VA, et al.
Applied Physics. A, Materials Science & Processing, 111(1), 319-322 (2013)
Nanocomposite calcium alginate fibres containing SiO2 and bioglass
Bogun M, et al.
Spine, 12, 18-18 (2010)
Saisai Wei et al.
The international journal of biochemistry & cell biology, 113, 95-102 (2019-06-21)
ZnO nanoparticle (ZnO NP) exposure causes oxidative stress in the respiratory system, leading to pulmonary damage. Activating transcription factor 3 (ATF3) participates in a variety of cellular stress responses. However, the role of ATF3 in ZnO NP genotoxicity and cytotoxicity
David M Brown et al.
Toxicology letters, 224(1), 147-156 (2014-01-28)
We investigated the effects of silica particles and nanoparticles (NPs) (50 nm and 200 nm) with a neutral and positively charged surface when dispersed in saline, bovine serum albumin (BSA) or lung lining fluid (LLF) 24 h post instillation into
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