Cenospheres for Ceramics: Refractories, Tiles, Fire bricks
1. A cenosphere is a lightweight, inert, hollow sphere comprised
largely of silica and alumina and filled with air and/or gases.
Cenospheres are a naturally occurring by-product of the burning
process at coal-fired power plants, and they have most of the same
properties as manufactured hollow-sphered products.
2. Typical Properties of Cenospheres
|SiO2||52 - 62%|
|Al2O3||32 - 36%|
|K2O||1.2 – 3.2%|
|Fe2O3||1 - 2%|
|TiO2||0.8 - 1.3%|
|MgO||1 – 2.5%|
|Na20||0.2 - 0.6%|
|CAO||0.1 – 0.5%|
3. Physical Properties
|Specific Gravity(g/cc)||0.65 - 0.75|
|Bulk Density(KG/M3)||350 - 450|
|Hardness(Moh's)||5 - 6|
|Compressive Strength(Kg/cm2)||180 - 280|
|Color||Light Grey – Light Buff|
|PH in water||6 - 7|
|Oil Absorption||16-18 G/100G|
(1). High refractoriness:
the main chemical composition of the floating beads is silicon and
aluminum oxide, wherein the silicon dioxide is about 50-65%, and
the aluminum oxide is about 25-35%. Because the melting point of
silica is as high as 1725 degrees Celsius, the melting point of
aluminum oxide is 2050 degrees Celsius, which are all high
refractory materials. Therefore, the floating beads have an
extremely high degree of refractoriness, generally reaching
1600-1700 degrees Celsius, making them excellent high-performance
thermal insulation; floating beads wall is hollow, the cavity is
semi-vacuum, only a very small amount of gas (N2, H2, and CO2,
etc.), heat conduction is extremely slow. Therefore, the floating
beads are not only lightweight (weight: 250-450 kg / m3), but also
excellent thermal insulation (thermal conductivity normal
temperature 0.08-0.1), which laid the foundation for its role in
the field of lightweight insulation materials.
(3). High hardness, high strength:
because the floating beads are made of silicon-aluminum oxide
mineral phase (quartz and mullite) hard glass body, the hardness
can reach Mohs 6-7, static pressure strength is as high as
70-140MPa, true The density is 2.10-2.20 g/cm3, so the floating
beads have high strength.
(4).the insulation is not conductive:
generally, the resistance of the insulator decreases with the
increase of temperature, the floating beads are opposite, the
resistance increases with the increase of temperature. This
advantage is not available in other insulating materials.
Therefore, it can be made into an insulating material with
(5). fine particle size, large specific surface area;
floating beads naturally formed particle size of 1-250 microns. The
specific surface area is 300-360g/cm2, which is similar to cement.
Therefore, the floating beads do not need to be ground and can be
used directly. Fineness can meet the needs of various products.
5. Usage :
(1)refractory insulation materials; such as lightweight sintered
refractory bricks, lightweight non-burning refractory bricks,
casting insulation risers, pipeline insulation shells, fire
insulation coatings, thermal insulation paste, composite insulation
dry powder, lightweight insulation wear-resistant glass steel,
(2)building materials; architectural decoration, high-grade paving
materials, roof waterproof insulation coating, road engineering,
modified asphalt, etc.
(3) Petroleum industry; oil field cementing, pipeline
anti-corrosion insulation, submarine oilfield, floating device, oil
well drilling mud mitigating agent, oil and natural gas
transmission pipeline, etc.
(4) insulating materials; plastic activated fillers, high
temperature, and high voltage insulators, etc.
(5)paint industry; paints, inks, adhesives, stealth paints,
insulating paints, anti-corrosive paints, floor paints,
high-temperature fire retardant paints, interior and exterior wall
paints, insulation coatings, floor paints, car putties, putty,
(6)Aerospace and space development; satellite, rocket, spacecraft
surface composite materials, satellite fire protection layer,
marine equipment, ships, deep-sea submarines, etc.;
(7)plastic industry; such as automotive trim, instrument panel,
appliance casing, fan, speaker, lamps General bearing, castings,
gears, structural parts, zippers, pipes, plates, etc.
(8)FRP products: various FRP products, artificial marble, FRP
ships, handicrafts, etc.; 9. Packaging materials: transformer
potting materials, electronic packaging materials, etc.;
40-60 mesh, 80-120 mesh, 150-200 mesh, 200 or more (PS) and other
--Free samples within 1-2KGs, but the delivery fee should be paid
by your side.
--We can supply MSDS, TDS, Test Report, Place of Original (Form A,
Form E,etc.), SGS test, etc. certifications.
(3) Strictly Quality Control
--Our strictly Quality Control Dept.,will inspect each batch of
goods before loading, only after the goods qualified, it can be
allowed to out of the factory.
(4)Profesional Document Service
--After shipped, our professional document department will serve
you all the documents for you timely.
Hebei Gator Chemicals Tech
Reg. Off: Qiaoxi District, Shijiazhuang city, Hebei province
Contact: Jerry Joung