Industrial grade Aluminum dihydrogen phosphate CAS 13530-50-2

What is Aluminum Dihydrogen Phosphate?

Aluminum dihydrogen phosphate , commonly known as aluminum dihydrogen phosphate , is an acidic phosphate composed of aluminum ions and dihydrogen phosphate ions. It belongs to the aluminum salt phosphate system and possesses strong adhesive properties, high-temperature resistance, and film-forming properties, making it one of the commonly used inorganic binders in industrial materials.

Its common chemical formula is usually written as:

A l(H2PO4)3 Al(H2PO4) 3

in:

· Al3+ represents aluminum ions;

· H2PO4−H 2 PO 4 − represents the dihydrogen phosphate ion.

Understanding from the name:

· Aluminum represents aluminum;

· Dihydrogen Phosphate represents dihydrogen phosphate;

· Aluminum Dihydrogen Phosphate is the dihydrogen phosphate salt of aluminum.

In industry, it is commonly found in the form of liquid aluminum dihydrogen phosphate or solid aluminum dihydrogen phosphate powder . The liquid product is usually a colorless to pale yellow transparent or translucent liquid, while the solid product is mostly a white or off-white powder.

In simple terms, Aluminum Dihydrogen Phosphate is an inorganic phosphate material with acidic, adhesive, and high-temperature resistant properties, making it particularly suitable for use in refractory, ceramic, casting, and high-temperature coating systems .

Industrial-grade aluminum dihydrogen phosphate typically has good water solubility or dispersibility, strong acidity, and can react with alumina, magnesium oxide, silicon oxide, refractory aggregates, and ceramic powders to form an inorganic network structure with strong bonding strength.

Depending on the product form, industrial-grade aluminum dihydrogen phosphate may manifest as:

· Colorless and transparent liquid;

· Pale yellow, transparent liquid;

· A semi-transparent, viscous liquid;

· White powder;

· Off-white powder;

· Granular solids;

· Water-soluble or dispersible powders.

Industrial-grade aluminum dihydrogen phosphate typically has the following characteristics:

· It is acidic ;

· It has strong inorganic adhesive properties ;

· It has good high temperature resistance ;

· It can be used in systems that cure at room temperature or by heating .

· It can be compounded with refractory aggregates and ceramic powders ;

· At high temperatures, aluminum phosphate-based bound phases can be formed ;

· It can improve the strength and wear resistance of materials ;

· Suitable for refractory materials, ceramics, casting, and coatings industries ;

· Industrial-grade products cannot be used in food, pharmaceutical, feed, or human contact ingestion scenarios .

What are the main uses of industrial-grade Aluminum Dihydrogen Phosphate?

The application value of industrial-grade aluminum dihydrogen phosphate mainly comes from its inorganic binding properties, high temperature resistance, acid reactivity, film-forming properties, and good compatibility with refractory/ceramic materials .

1. Refractory material binder

This is one of the most important uses of Aluminum Dihydrogen Phosphate.

Main function:

· Bonding refractory aggregates;

· Improve the room temperature strength of refractory materials;

· Improve high-temperature bonding performance;

· Improve thermal shock resistance;

· Improve wear resistance;

· Enhanced erosion resistance;

· Shorten drying or curing time.

Possible applications:

· Refractory castables;

· Refractory bricks;

· ramming material;

· Spray patching material;

· Furnace lining repair material;

· High-alumina refractory materials;

· Corundum refractory materials;

· Aluminosilicate fiber products.

In refractory systems, it is usually used in combination with materials such as alumina, corundum, mullite, bauxite, and clay.

2. Ceramic binders and molding aids

Aluminum Dihydrogen Phosphate can be used in the production of ceramic bodies, ceramic coatings, and specialty ceramics.

Main function:

· Improve the strength of ceramic green bodies;

· Improve powder forming performance;

· Improve strength before sintering;

· Participating in the formation of high-temperature bonding phases;

· Improve the adhesion of ceramic coatings;

· Improve the thermal stability of materials.

Possible applications:

· Industrial ceramics;

· Special ceramics;

· Ceramic filter materials;

· Ceramic fiberboard;

· Ceramic coating;

· High-temperature insulating materials.

3. High-temperature adhesives

Due to its inorganic properties, Aluminum Dihydrogen Phosphate can be used in high-temperature adhesive systems.

Main function:

· Provides inorganic bonding force;

· Improve the bonding stability under high temperature conditions;

· Replaces some organic resin adhesives;

· Reduce the problem of organic matter decomposition at high temperatures;

· Improves fire resistance and heat resistance.

Possible applications:

· Ceramic-to-ceramic bonding;

· Ceramic-metal bonding;

· Refractory fiber bonding;

· High-temperature sealing;

· Furnace body repair;

· The pipe insulation layer is fixed.

4. Bonding of casting coatings and sand molds

In the foundry industry, Aluminum Dihydrogen Phosphate can be used in foundry coatings and sand mold bonding systems.

Main function:

· Improve the fire resistance of the coating;

· Improve molding sand strength;

· Improve resistance to molten metal erosion;

· Improve the surface quality of castings;

· Reduce casting defects;

· Improve coating adhesion.

Possible applications:

· Casting coatings;

· Sand casting;

· Core bonding;

· Precision casting;

· High-temperature mold coating.

5. Inorganic coatings and fire-retardant coatings

Aluminum Dihydrogen Phosphate can be used in inorganic coatings and high-temperature resistant coatings.

Main function:

· As an inorganic film-forming binder;

· Improve coating adhesion;

· Improve heat resistance;

· Improve fire resistance;

· Enhanced resistance to chemical corrosion;

· Improve coating hardness and wear resistance.

Possible applications:

· Fire-retardant coatings;

· High-temperature coatings;

· Heat-resistant and corrosion-resistant coatings;

· Flue coating;

· Furnace body coating;

· Metal protective coating.

6. Metal surface treatment and corrosion protection systems

Phosphates can be used to form a protective phosphate layer on metal surfaces or to participate in anti-corrosion coating systems.

Main function:

· Improve adhesion to metal surfaces;

· Improve the stability of anti-corrosion coatings;

· Participates in the formation of inorganic protective films;

· Improve salt spray resistance;

· Enhance the adhesion between the coating and the metal substrate.

Possible applications:

· Steel structure coatings;

· Metallic primer;

· Corrosion protection for industrial equipment;

· Pipeline corrosion protection;

· High-temperature metal protective coating.

7. Research on catalysts, adsorbents, and inorganic materials

In materials science research, aluminum dihydrogen phosphate can also be used as an aluminum or phosphorus source to prepare aluminum phosphate materials.

Possible uses:

· Preparation of aluminum phosphate materials;

· Catalyst support;

· Porous materials;

· Adsorbent materials;

· Molecular sieve-related research;

· Inorganic composite materials.

These types of applications typically have higher requirements for purity, impurities, and structure control.

Summarize

Aluminum dihydrogen phosphate , commonly known as aluminum dihydrogen phosphate or aluminum acid phosphate , is an important industrial-grade inorganic phosphate material. Its common chemical formula is:

Al(H2PO4)3 Al(H 2 PO 4 ) 3

It possesses acidity, inorganic adhesive properties, high temperature resistance, and good material compatibility, and is widely used in:

· Refractory material binder;

· Ceramic binders and molding aids;

· High-temperature adhesives;

· Bonding of casting coatings and sand molds;

· Inorganic coatings and fire-retardant coatings;

· Metal surface protection and corrosion prevention systems;

· Research on catalysts, adsorbents and inorganic materials.

In our daily lives, we may indirectly come into contact with Aluminum Dihydrogen Phosphate through the following scenarios:

· Refractory bricks and high-temperature furnace linings;

· Ceramic products and ceramic processing materials;

· Casting materials and metal castings;

· Fire-retardant coatings and high-temperature resistant coatings;

· Metal anti-corrosion coating;

· High-temperature adhesives and inorganic adhesives;

· Industrial repair materials and refractory repair materials.

Finally, it must be emphasized that industrial-grade aluminum dihydrogen phosphate is only for use in industrial production, refractory materials, ceramics, coatings, casting, and materials processing. It cannot be used in food, pharmaceuticals, animal feed, cosmetics, or any human/animal ingestion. In practical applications, key considerations should be given to product form, main content, acidity, aluminum-phosphorus content, binding properties, storage stability, application conditions, and environmental emission requirements.