About Hollow Glass Sphere Hollow Glass Beads:
What is hollow glass microsphere? Hollow glass microspheres, sometimes termed microballoons or glass bubbles, have diameters ranging from 10 to 300 micrometers. Hollow spheres are used as lightweight fillers in composite materials such as syntactic foam and lightweight concrete. The hollow glass bead is a kind of specially processed glass bead, which is mainly characterized by smaller density and poorer thermal conductivity than glass bead. It is a new kind of micron-grade light material developed in the 1950s and 1960s. Its main component is borosilicate, with a general particle size of 10~250μm and a wall thickness of 1~2μm. Hollow glass beads are characterized by high compressive strength, high melting point, high resistivity, small thermal conductivity and thermal shrinkage coefficient, etc., and they are known as the "space-age material" in the 21st century.
Hollow glass microspheres, also known as bubbles, microbubbles, or micro balloons, are usually formulated from borosilicate - sodium salt glass mixtures and offer the advantages of low density, high heat and chemical resistance. The walls of glass microspheres are rigid and are usually about 10% thick of the diameter of the spheres. At present, spherical particles have a wide range of densities, from as low as 0.06g/ C3 to as high as 0.80g/ C3, with particle sizes ranging from 5um to 180um. The compressive strength of the hollow sphere is determined by the wall thickness of the hollow sphere and, as expected, the greater the density of the sphere, the higher the compressive strength.The lightweight hollow glass sphere is chemically stable, non-flammable, non-porous, excellent water resistance. Orachemicals is a trusted global Hollow Glass Sphere Hollow Glass Beads supplier. Feel free to send an inquiry about the latest price of Hollow Glass Sphere Hollow Glass Beads at any time.

Product Performance of Hollow Glass Sphere Hollow Glass Beads:
Hollow glass microspheres are micron-level hollow glass microspheres with a smooth surface. The main chemical component is borosilicate glass, and it is a hollow transparent sphere under the electron microscope. Hollow glass beads have low density, high strength, high temperature resistance, acid and alkali resistance, low thermal conductivity, electrical insulation and other properties. They have good fluidity and chemical stability, and they are multi-functional frontier new materials across fields.

Technical Parameter of Hollow Glass Sphere Hollow Glass Beads:

How are Hollow Glass Sphere Hollow Glass Beads Produced? 
How do you make glass microspheres?
1. Glass powder method
The glass powder method uses pre-prepared glass powder containing gases such as SO3 to pass through the flame at the temperature of 1100-1500℃. At this time, SO3 and other gases dissolved in the glass powder overflow from the inside of the glass due to the decrease in solubility and the change in the atmosphere of the kiln. At the same time, the glass powder becomes spherical under high temperature due to the surface tension. The spillage gas is sealed in the spherical particles to form hollow glass beads.
2. Spray granulation method
Spray granulation method is made in advance with special auxiliary reagent (boric acid, urea, ammonium pentaborate) aqueous solution of sodium silicate, and then through the nozzle to the solution injection into the spray dryer, is expected to drop after drying to get a certain particle size of powder particles, the final will be powder particle heating foam-forming hollow glass beads.
3. The droplet method
The liquid drop method adopts the same raw materials as the spray granulation method. The raw materials are 500 copies of sodium silicate (M (SiO2): M (Na2O) =2), and the same amount of 10% ammonium perborate aqueous solution is added. After mixing evenly, the hollow glass beads are sprayed into the spray drying tower.
4. Dry gel method
The alkyl salt was added to dilute hydrochloric acid and decompose with water. After gelation, the gel was dried in two stages at 60℃ and 150℃ and then crushed by a ball mill. After grading, the dried gel powder was obtained, which was foamed in a vertical electric furnace at 1280℃ to prepare hollow glass microspheres.
 
Applications of Hollow Glass Sphere Hollow Glass Beads:
Hollow glass microspheres are widely used in glass fiber reinforced plastic products, composite foam plastic, artificial marble, compound wood, sound insulation heat preservation material, atomic ash, deep-sea buoyancy, bowling, low-density cement, sealing material, lightweight, resin handicraft, the mural wall hanging frame, wall plate sandwich layer structure of lightweight packaging materials, electronic industry, absorbing material, lightweight concrete, such as emulsion explosive.
Hollow glass microspheres also provide a conductive coating. Conductive coatings of optimized thickness provide spherical particles with excellent conductivity and shielding properties while maintaining the weight savings associated with hollow, low-density materials. These conductive microbubbles are suitable for military applications, biotechnology, medical devices, electronics and other special industries.
Hollow glass beads have obvious weight reduction and sound insulation and heat preservation effect so that the products have good cracking resistance and reprocessing performance, is widely used in engineering plastics, insulation materials, rubber, buoyancy material, FRP, artificial marble, man-made agate, generation of composite materials such as wood, and the oil industry, aerospace, communications, 5 g new high-speed trains, cars, ships, in areas such as thermal insulation coatings, adhesives, vigorously promote the development of science and technology.

Packing & Shipping of Hollow Glass Sphere Hollow Glass Beads:
We have many different kinds of packing which depend on hollow glass spheres quantity.
Hollow glass spheres packing: 1kg/bag, 25kg/barrel, or 200kg/ barrel.
Hollow glass spheres shipping: could be shipped out by sea, by air, by express as soon as possible once payment receipt.

About Magnesium Silicide Mg2Si Powder:
Magnesium silicide is an inorganic compound composed of magnesium and silicon, and the chemical formula is Mg2Si, and the molecular weight is 76.71. Cyan or light purple powder, cubic crystal. The melting point is 1102 ° C, the relative density 1.94.
Magnesium silicide is insoluble in cold water and decomposes in hot water. It can be completely decomposed in vacuum or heating to 1200 ° C under hydrogen flow. Stable for the alkali solution. Decompose and produce silane and hydrogen. Mg2Si is the only stable compound of the MG-Si binary system, which has a high melting point, high hardness, high-elastic modulus characteristics, is a narrow bandgap n-type semiconductor material, manufactured in optoelectronic devices, energy devices, lasers, semiconductors, Heavy temperature control communication and other fields have important application prospects.  The Mg2Si crystal has an entire structure, which belongs to the facial cubic lattice, the space group is FM3M, the group number is 225, the lattice constant a = 0.6391 nm. In the crystal structure, each Si atom is located in the (0, 0, 0) position, forming a facial cubic structure having a side length A. The MG atom is located at a position (0.25, 0.25, 0.25) position, each MG atom located at the center of the tetrahedron composed of Si atoms, forming an unfilial structure of the edge length A / 2. Magnesium silicide is a narrow gap semiconductor. The growth of the crystals exhibits n-type conductivity, but it can be doped by doping with Ag, Ga, Sn, and possible Li (in high doped level). Feel free to send an inquiry to get the latest price if you would like to buy Magnesium Silicide Mg2Si Powder in bulk.

Characteristics of Magnesium Silicide Mg2Si Powder:
Magnesium silicide Mg2Si powder (CAS 22831-39-6) has a high melting point, high corrosion resistance, high oxidation resistance, good electrical conductivity, high-temperature ductility, a binary alloy system the intermediate phase.

Technical Parameter of Magnesium Silicide Mg2Si Powder:

Chemical Composition of Magnesium Silicide Mg2Si Powder:

How is Magnesium Silicide Mg2Si Powder produced?
The silica powder having a particle diameter of 180, magnesium powder is 100 g in a certain molar ratio, mix well into the iron, put the tubular reactor, vacuum and use a hydrogen gas reactive reaction system 3 times, vacuum to 133 Pa, A closed reactor, slowly warming up to a certain temperature, and after a while, the reaction product is lowered to room temperature at a certain rate to obtain the reaction product. Through the research of the silicide magnesium, the optimized process conditions are reaction temperature 600 ° C, the reaction time 4 h, mg: Si molar ratio 2.02: 1, cooling rate 10 ° C / min, product quality, magnesium silicide content of More than 98%.

Application of Magnesium Silicide Mg2Si Powder:
Magnesium silicide is often used to produce aluminum alloys, which contains about 1.5% magnesium silicide, with aging hardening features, can form G.P area and very uniform precipitation phase, which can improve the strength of the alloy.
Magnesium silicide is used to generate a 6000 series of aluminum alloys containing up to about 1.5% Mg2Si. The alloy of the group can be hardened to form the Guinier-PRESTON zone and a very fine precipitate, both result in an increase in the strength of the alloy.
The main potential electronic application of MG2Si is a thermoelectric generator.
Magnesium silicide is primarily used to synthesize other silicides.
Magnesium silicide is used to synthesize MgSin2 powder. It belongs to the preparation of non-oxide ceramic powder.
A by-product use of silicide of magnesium silicide.

Packing & Shipping of Magnesium Silicide Mg2Si Powder:
We have many different kinds of packing which depend on the magnesium silicide Mg2Si powder quantity.
Magnesium silicide Mg2Si powder packing: vacuum packing, 1kg/bag, 25kg/barrel, or as your request.
Magnesium silicide Mg2Si powder shipping: could be shipped out by sea, by air, by express as soon as possible once payment receipt.