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Silicon dioxide

Name: Silicon dioxide
Brand: ALDRICH

single crystal substrate, optical grade, 99.99% trace metals basis, L × W × thickness 10 mm × 10 mm × 0.5 mm

Sustainability features

Synonym(s):

Cristobalite, Quartz, Sand, Silica

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About This Item

Linear Formula:

SiO₂

CAS Number:

60676-86-0

Molecular Weight:

60.08

NACRES:

NA.23

PubChem Substance ID:

24882697

UNSPSC Code:

12352303

EC Number:

262-373-8

MDL number:

MFCD00011232

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Properties

grade

optical grade

Quality Segment

100

assay

99.99% trace metals basis

form

solid

hardness

7.0 mohs

sustainability

Sustainability features

L × W × thickness

10 mm × 10 mm × 0.5 mm

refractive index

n20/D 1.544 (lit.)

mp

1610 °C (lit.)

transition temp

T_m 573.1 °C (phase change)

density

2.6 g/mL at 25 °C (lit.), 2.684 g/mL

greener alternative category

SMILES string

O=[Si]=O

InChI

1S/O2Si/c1-3-2

InChI key

VYPSYNLAJGMNEJ-UHFFFAOYSA-N

Description

General description

We are committed to bringing you Greener Alternative Products that adhere to one of the four categories of Greener Alternatives. This product is an enabling product used for deposition in photovoltaic devices, enhancing their design and structure to promote energy efficiency. Click here for more information.

Application

SiO₂ is majorly used as a substrate material with excellent thermo-mechanical properties in a variety of applications which include:

vapour deposition
phase deposition
atomic force microscopy probes(AFM)
spin coating
electronic based devices

Features and Benefits

An excellent substrate for microwave filters for applications in the wireless communication arena.

Physical form

Crystalline, hexagonal (a = 4.914 Å, c = 5.405 Å)

Other Notes

specific heat = 0.18 cal/g; thermoelectric constant = 1200μV/°C @ 300 °C; thermal conductivity = 0.0033 cal/cm°C; themal expansion (x10^-6) = α₁₁: 13.71, α₃₃: 7.48; Q value = 1.8 × 10⁶ min; acoustic velocity, SAW = 3160 m/sec; frequency constant, BAW = 1661 kHz/mm; piezoelectric coupling = K² BAW: 0.65%, SAW: 0.14%

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This Item	85356	342890	84878
Sigma-Aldrich 634867 Silicon dioxide	Sigma-Aldrich 85356 Silicon dioxide	Sigma-Aldrich 342890 Silicon dioxide	Sigma-Aldrich 84878 Silicon dioxide
description single crystal substrate, optical grade, 99.99% trace metals basis, L × W × thickness 10 mm × 10 mm × 0.5 mm	description granular, ≥99.9%	description −325 mesh, 99.5% trace metals basis	description purum p.a., acid purified, sand
grade optical grade	grade -	grade -	grade purum p.a.
form solid	form granular	form powder	form sand
assay 99.99% trace metals basis	assay ≥99.9%	assay 99.5% trace metals basis	assay -
mp 1610 °C (lit.)	mp 1610 °C (lit.)	mp 1610 °C (lit.)	mp 1610 °C (lit.)
Quality Level 100	Quality Level 100	Quality Level 100	Quality Level 200
density 2.684 g/mL, 2.6 g/mL at 25 °C (lit.)	density 2.6 g/mL at 25 °C (lit.)	density 2.6 g/mL at 25 °C (lit.)	density 2.6 g/mL at 25 °C (lit.)

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Storage Class

13 - Non Combustible Solids

WGK

nwg

Flash Point (°F)

Not applicable

Flash Point (°C)

Not applicable

PPE (personal protective equipment)

dust mask type N95 (US), Eyeshields, Gloves

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