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bola de cristal：SODA LIME GLASS BALLS--ZIBO NAAO
Light weight glass balls, they are chemically inert and they allow to get excellent surface finishing.
Applications
Special bearings and valves, plastic bearings, low-cost check valves, metering pumps, flow meters, measurement instruments, agitators, optic fiber devices, ink cartridges, closures for bottle, shot blasting, grinding. They are used even into art and decoration fields.
Chemical composition
SiO2 | Na2O | CaO | MgO | Al2O3 | Li2O | K2O | TiO2 | Fe2O3 | PbO |
63.00-81.00 | 9.00-15.00 | 7.00-14.00 | 6.00 max | 2.00 max | 2.00 max | 1.50 max | 0.80 max | 0.80 max | 0.010 max |
Physical / mechanical / thermal / electric / magnetic properties
Property | Symbol | U.o.M. | Type | Notes | Values |
Density | δ | g/cm^3 | Physical | Room temp. | 2.50 |
Young's modulus | E | GPa | Mechanical | - | 70 |
Refractive index | n | - | Optic | - | 1.518 |
Softening temperature | - | ºC/ºF | Thermal | Room temp./P.atm. | 726 / 1340 |
Coefficient of linear thermal expansion | α | 10^-6/ºC | Thermal | (ΔT=0-100°C) | 9.4 |
Thermal conductivity | λ | W/(m·K) | Thermal | Room temp. | 1.00 |
Volume resistivity | ρ | Ω*m | Electric | - | > 10^14 |
Relative magnetic permeability | µ | - | Magnetic | Diamagnetic | <~1 |
Technical data
Property | Type | U.o.M. | Values | U.o.M. | Values |
Hardness | Mechanical | Knoop | 465-585 | - | - |
Ultimate compressive strength | Mechanical | MPa | 900-1100 | psix10^3 | 131-159 |
Service temperature | Thermal | ºC | 0/200 | ºF | 32/392 |
Range
Diameters | U.o.M. | Diameters | U.o.M. | Precision Grade (ISO 3290) |
1.000- 100.000 | mm | 3/64 -4 | inch | G100-200-500-1000-2000 |
Corrosion Resistance
Basically inert material, soda lime balls resist even to strong alkaline solutions.