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342890

Sigma-Aldrich

二氧化硅

−325 mesh, 99.5% trace metals basis

同義詞:

方石英, 石英, 砂石, 硅石

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About This Item

線性公式:
SiO2
CAS號碼:
60676-86-0
分子量：:
60.08
EC號碼:
262-373-8
MDL號碼:
MFCD00011232
分類程式碼代碼:
12352303
PubChem物質ID:
24861083
NACRES:
NA.23
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化驗

99.5% trace metals basis

形狀

powder

折射率

n20/D 1.544 (lit.)

粒徑

−325 mesh

mp

1610 °C (lit.)

密度

2.6 g/mL at 25 °C (lit.)

應用

battery manufacturing

SMILES 字串

O=[Si]=O

InChI

1S/O2Si/c1-3-2

InChI 密鑰

VYPSYNLAJGMNEJ-UHFFFAOYSA-N

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相關類別

應用

SiO2主要用作具有良好热机械性质的基质材料，可用于各种应用，包括：气相沉积[1][2]、相沉积[3]、原子力显微镜探针(AFM)[4]、旋转涂覆[5]、电子设备。[6]

其他說明

其可能含有吸附的H2O和CO2，这些组分可通过在>900°C下煅烧除去

儲存類別代碼

13 - Non Combustible Solids

水污染物質分類（WGK）

nwg

閃點（°F）

Not applicable

閃點（°C）

Not applicable

個人防護裝備

dust mask type N95 (US), Eyeshields, Gloves

從最近期的版本中選擇一個：

分析證明 (COA)

Lot/Batch Number
MKCW1671
MKCV5291
MKCT1789
MKCQ0211
MKCN2365

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The effect of calcination temperature on the surface microstructure and photocatalytic activity of TiO2 thin films prepared by liquid phase deposition.
Yu J, et al.
The Journal of Physical Chemistry B, 107(50), 13871-13879 (2003)
Exciton diffusion measurements in poly (3-hexylthiophene).
Shaw PE, et al.
Advanced Materials, 20(18), 3516-3520 (2008)
Electrical and optical properties of ZnO transparent conducting films by the sol-gel method.
Lee J, et al.
Journal of Crystal Growth, 247(1-2), 119-125 (2003)
Oxygen-aided synthesis of polycrystalline graphene on silicon dioxide substrates.
Chen J, et al.
Journal of the American Chemical Society, 133(44), 17548-17551 (2011)
Measurement of the adhesion force between carbon nanotubes and a silicon dioxide substrate.
Whittaker JD, et al.
Nano Letters, 6(5), 953-957 (2006)
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Questions

1–3 of 3 Questions  

  1. 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

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  2. 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?

  3. Is it(342890) porous silica? I want to know the specific surface area and particle size distribution(dispersity) (Batch number is MKCT1789)

    1 answer

    1. The quality specifications for product no. 342890-100G Silicon dioxide do not include a determination of its specific surface area. Our supplier does characterize the product as porous silica.

      As the Certificate of Analysis for lot MKCT1789 shows, the mean particle size is 2.08 microns. Detailed QC testing shows:
      Diameter at 10%: 0.45 microns
      Diameter at 50%: 2.06 microns
      Diameter at 90%: 3.88 microns

      Future lots of the product might vary in their particle size characteristics within the quality specification of being no larger than 45.00 microns.

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