Cenospheres is a kind of fly ash hollow ball that can float on the
surface of the water. It is grayish-white, thin and hollow, light
in weight, with a bulk density of 250-450kg/m3, a particle size of
about 0.1 mm, a closed and smooth surface, and a small thermal
conductivity. Refractoriness ≥ 1700 ° C, is an excellent insulation
refractory material, widely used in the production of lightweight
castables and oil drilling. The chemical composition of the
floating beads is mainly composed of silica and alumina and it has
various functions such as fine particles, hollow, lightweight, high
strength, wear resistance, high-temperature resistance, thermal
insulation, insulation and flame retardancy every industry.
1.Chemical composition:Item | SiO2 | Al2O3 | Fe2O3 | SO3 | CaO | MgO | K2O | N2O |
Content | 56-62 | 30-38 | 2-4 | 0.1-0.2 | 0.2-0.4 | 0.8-1.2 | 0.5-1.1 | 0.3-0.9 |
2.Physical properties:Iem | Test | Item | Test | |
Shape | high fluidity | Particle size | 10-400 | |
Color | Light gray white | Specific resistance | 1010-1013 | |
True density | 0.5-0.8 | Mohs hardness | 6-7 | |
Bulk density | 0.3-0.5 | PH | 6 | |
Refractoriness | 1750°C | Melting point | ≥1400 | |
Temperature coefficient | 0.000903-0.0015 | Thermal conductivity | 0.054-0.095 | |
Compressive strength | ≥350 | Refractive index | 1.54 | |
Burnout rate | 1.33 | Oil absorption rate | 0.68-0.69 | |
3.Characteristics :
(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
refractories.
(2). Light-weight:
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
excellent performance.
(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.
4. Other Application of Aluminosilicate MicrospheresAs has already been noted, aluminosilicate microspheres
(cenospheres), due to their special properties, have a variety of
applications:
- Building and finishing materials: filler for compressed concrete
(paving, paving slabs, and decorative elements)
- Construction of decorative structural sections and face-mounted
attachments; artificial stone for interior and exterior finish of
buildings;
- Automotive and the aviation industry: a filler for the production
of composites, repair putties, and primers, compositions for the
production of tires, bumpers and panels, sound dampening materials,
light blade propellers, trim elements, etc.
- Manufacture of abrasive tools: highly porous grinding wheels
featuring closed design and high performance;
- Compositions for surface protection against adhesion of weld
spatter in the manufacture of welded complex-shape steel
structures;
- Fire-resistant filling for steel casting molds;
- Production of non-slip compositions for the manufacture of heels
and soles for footwear;
- Furniture:a filler for the production of furniture moldings;
creation of layers, which float on the surface of the oil to
provide the reduction of vaporization.
5.Specifications:
40-60 mesh, 80-120 mesh, 150-200 mesh, 200 or more (PS) and other
products.
6.Our service:
(1)Free Samples
--Free samples within 1-2KGs, but the delivery fee should be paid
by your side.
(2)All-over Certifications
--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)Professional Document Service
--After shipped, our professional document department will serve
you all the documents for you timely.
7.Contact
Hebei Gator Chemicals Tech
Reg. Off: Qiaoxi District, Shijiazhuang city, Hebei province
Contact: Jerry Joung
Twitter:jerryyoung2014