Meishen Technology Company
Magnesium
hydroxide flame retardant has the properties of colorless, non-toxic,
tasteless, non-corrosive and so on.
Magnesium
hydroxide with good lamellar or fibrous crystal shape can be well matched with
the raw material, without affecting the strength of the raw material and other
physical properties, effectively improve the flexural strength and elongation
of polymer materials.
Therefore,
magnesium hydroxide flame retardant with special morphology has better
properties and wider application.
As
an important chemical product, magnesium hydroxide has been widely used in the
fields of ceramics, flame retardant, catalysis, medicine and environmental
protection.
The
morphology, size and dispersion of magnesium hydroxide nanomaterials will
affect their application performance, so it is necessary to regulate them.
Taking
magnesium hydroxide as the research object, the morphology, size and dispersion
of magnesium hydroxide products were successfully controlled by adjusting the
synthesis conditions.
The
aluminum-magnesium composite coating was prepared by plasma spraying with
magnesium hydroxide powder as one of the starting materials.
(1)
a process was designed for the preparation of magnesium hydroxide nanometer
powder by ammonia diffusion at room temperature.
Under
the guidance of S042- ion and PEG, magnesium hydroxide nanoparticles can
crystallize into spherical crystals with good morphology.
The
effects of reaction concentration, reaction time, solvent and additives on the
final morphology of globular products were studied by different comparative
experiments.
By
changing the type of additives, the average diameter of spherical crystals can
be adjusted to meet the requirements of various specific applications.
By
changing the type of magnesium salt reactants and additives, the product of
magnesium hydroxide, which is different from the spherical morphology, can be
obtained by using the ammonia diffusion system.
(2)
taking the synthesized magnesium hydroxide product as the raw material, the
aluminum magnesium composite ceramic coating was prepared on the matrix surface
of Q235 steel by plasma spraying equipment using the melting point difference
between magnesium hydroxide and magnesium oxide.
The
phase composition and microstructure of the composite coating were
characterized by X-ray diffraction (XRD) and scanning electron microscopy
(SEM).
Aluminum-magnesium
composite ceramic coating is mainly composed of a-a1203, m-a1203 and MgO.
Magnesium
hydroxide has a better economic and social benefits and a wider application
prospect in the field of composite coating.