440345

Glass spheres

• Empirical Formula (Hill Notation): O₂Si
• CAS Number: 65997-17-3
• Molecular Weight: 60.08
• EC Number: 266-046-0
• MDL number: MFCD00147032
• UNSPSC Code: 23201100
• PubChem Substance ID: 24867590
• NACRES: SB.52

Properties

• grade: high-purity grade
• form: powder
• technique(s): LPLC: suitable
• surface area: 125 m²/g
• matrix: Silica
• matrix active group: silica
• mean particle size: 9-13 μm
• density: 1.1 g/mL at 25 °C (lit.)
• suitability: suitable for acidity or alkalinity (alkalinity < 0.5 meq/g ASTM D 3100)
• SMILES string: O=[Si]=O
• InChI: 1S/O2Si/c1-3-2
• InChI key: VYPSYNLAJGMNEJ-UHFFFAOYSA-N

Description

General description

Silica is a naturally occurring material in minerals, flint and in some plants in crystalline phase. Silica used in industries is in synthetic form. Surface area, pore volume, pore size and particle size are independently controllable to some extent. The crystalline silica may be classified based on atmospheric pressure as:
a. Quartz = 1143K
b. Tridymite 1143 - 1743K
c. Cristobalite = 1743, over 1973K it forms amorphous vitreous silica glass.

Application

Low density filler for coatings and plastics.

Silica glass spheres are low density filler for coatings and plastics. Silica was used in synthesis of silicalite. Silica was also used to assist the catalytic growth of oxide and nitride nanowires.

Features and Benefits

Light weight, crush-resistant filler. Imparts dimensional stability, reduces warpage, reduces plastic melt viscosity and provides multidirectional orientation in reinforced composites.

Physical form

Hollow, spherical non-porous glass beads.

Safety Information

• Storage Class Code: 11 - Combustible Solids
• WGK: WGK 1
• Flash Point(F): Not applicable
• Flash Point(C): Not applicable
• Personal Protective Equipment: dust mask type N95 (US), Eyeshields, Gloves