Pentahydrate Borax
(Na2B4O7.5H2O)
Chemical analysis
Crystalline
Purity: 99.90 % min
B2O3: 48.00%min.
NA2O: 21.45%min.
Size distribution
Crystalline
Molecular Weight: 291.35
Specific Gravity: 1.815 gr/cm3
Bulk Density: 0.980 gr/cm3
Fraction/+1mm: 6% max
Fraction/-0.060mm: 2% max.
50kg/bag 24Mton/20'FCL load without palletized.
Borax Decahydrate is the refined form of natural sodium borate and has the chemical formula Na2B4O7.10H2O. Composed of boric oxide (B2O3), sodium oxide, and water, it is a mild, alkaline salt, white and crystalline, with excellent buffering and fluxing properties.
Available in crystalline (granular) or powder form, Borax Decahydrate is an important multifunctional source of B2O3, particularly for processes in which the simultaneous presence of sodium is beneficial.
Physical properties & size distribution
Crystalline
Molecular Weight: 381.83
Specific Gravity: 1.73 gr/cm3
Bulk Density: 0.812 gr/cm3
Fraction / +1 mm: 0.8% max
Fraction / -0.060 mm: 4% max
Chemical Composition
Crystalline
Purity: 99.90 % min
B2O3: 36.47 % min
SO4: 70 ppm max
Cl: 50 ppm max
Fe: 10 ppm max
Borax Decahdrate is used as a raw material for
Commercial sodium borate,
Glass,
Porcelain enamel,
Starch and adhesives,
Detergents,
Herbicides,
Fertilizers,
Rust inhibitors,
Pharmaceuticals
Leather,
Photography,
Bleaches,
Paint,
Boron compounds,
Smelters,
Insulation materials.
50kg/bag 24Mton/40'FCL load without palletized.
Boric Acid, also called Boracic Acid or Orthoboric Acid, is a mild acid that exists in the form of colorless crystals or a white powder and dissolves in water.
Available in crystalline (granular) or powder form, Boric Acid has the chemical formula H3BO3, sometimes written B(OH)3. When occurring as a mineral, it is called Sassolite.
Chemical Composition - TYPICAl
Normal Sulphate: Low Sulphate
Purity: 99,90 % min: 99,90 % min
B2O3: 56.25 % min: 56.25 % min
SO4: 500 ppm max: 130 ppm max
Cl: 15 ppm max: 15 ppm max
Fe: 20 ppm max: 10 ppm max
PHYSICAL PROPERTIES & SIZE DISTRIBUTION - CRYSTALLINE
Molecular Weight: 61.83: 61.83
Specific Gravity: 1.435 gr/cm3: 1.435 gr/cm3
Bulk Density: 0.8 gr/cm3: 0.8 gr/cm3
Fraction/+1 mm: 4% max: 4% max
Fraction/-0.060mm: 4% max: 5% max
PHYSICAL PROPERTIES & SIZE DISTRIBUTION - powder
Molecular Weight: 61.81
Specific Gravity: 1.435 gr/cm3
Bulk Density: 0.7 gr/cm3
Fraction / +1 mm: 0%
Fraction / -0.060 mm: 30% min.
Application:
Chemicals (Borates, water-glass manufacture, nitric acid from saltpeter
with simultaneous production of borax),
Ceramic glazes,
High grade cements capable of taking high polishes Impregnating wicks of stear in candles,
Glass pastes and special glasses,
Intermediates,
Laundry starch glazes,
Leather preparation of hides prior to tanning (leather-dressing compounds),
Artificial precious stones,
Metallurgy (Welding flux, brazing copper, enamel coatings on iron),
Fireproofing compositions and linings for safes,
Pigments (borated ultramarine),
Enamel paints,
Manufacture of imitation hard wood from soft wood,
Paper glazes,
Medicine,
Cosmetics,
Soaps,
Textiles (Fireproofing, mordant, solvent bleach),
Fiberglass insulation.
50kg/bag 24mton/40'fcl load without palletized.
The tubes are made from low emissivity borosilicate glass (glass with a very low iron content that has superior durability and heat resistance ) with an all-glass seal and they employ AL/N on AL selective coating, which enables the use of the whole solar energy spectrum to generate heat; this produces greater thermal efficiency in bright sunshine but also produces high efficiency in overcast or diffuse sunlight conditions. Further, the tubes are evacuated and have a barium getter (vacuum indicator) which changes color from silver to white if a tubes vacuum has been compromised.
Why a vacuum? As you would know if you have used a glass lined thermos flask, a vacuum is an excellent insulator. The vacuum eliminates a physical connection between the two glass layers of the tube which means there is nothing to transfer thermal energy so the heat cannot escape! This is important because once the evacuated tube absorbs the radiation from the sun and converts it to heat, we don't want to lose it!! The vacuum helps to achieve this. The insulation properties are so good that while the inside of the tube may be 150oC / 304oF , the outer tube remains within a few degrees of the ambient air temperature. This means that evacuated tube water heaters can perform well even in cold weather, when flat plate collectors perform poorly in these conditions due to heat loss.
In order to maintain the vacuum between the two glass layers, a barium getter is used (the same as in television tubes). During manufacture of the evacuated tube this getter is exposed to high temperatures causing the bottom of the evacuated tube to be coated with a layer of pure barium. Called a "getter", this barium layer actively absorbs any CO, CO2, N2, O2, H2O and H2 out-gassed from the evacuated tube during it's lifetime and increases the longevity of the vacuum. This barium layer also provides a clear visual indication of the vacuum status; the silver-colored barium layer turns white if the vacuum is lost making it easy to identify.
8-10Pcs/carton with foam inside.
Opaque Frit
Firing Range():1080-1120
C.O.E(¡Á10-7/):190
Softening Point ():763
Bright and smooth white
CAS:51920-12-8
Suitable for double firing wall tile with good glossy, good flatness and good whiteness.
