Views: 0 Author: Site Editor Publish Time: 2016-04-20 Origin: Site
Liquid Aluminum Dihydrogen Phosphate (ADP) is a key inorganic binder used in alumina foam ceramic manufacturing. It directly affects slurry rheology, green body strength, pore structure, and final sintered performance. This article explains how optimizing ADP density, concentration, and firing temperature can significantly enhance ceramic strength and production efficiency.
When the ADP solution density is approximately 1.35 g/cm³, the slurry exhibits ideal viscosity and thixotropic behavior, ensuring uniform coating of polyurethane foam templates during the impregnation process.
Higher ADP content results in smaller sponge pore channels (higher PPI value), which directly influences the final filtration accuracy and structural uniformity of alumina foam ceramics.
ADP concentration plays a crucial role in balancing strength and humidity resistance:
· Higher concentration → Increased dry strength but higher moisture sensitivity.
· Lower concentration → Reduced dry strength but improved resistance to moisture regain.
Careful formulation design ensures optimal mechanical integrity while maintaining storage and handling stability.
At approximately 1180°C, Aluminum Dihydrogen Phosphate converts into Aluminum Phosphate (AlPO₄), forming Al–O–P–O–Al bonding structures that provide basic ceramic strength.
The final product mainly consists of corundum (α-Al₂O₃), tridymite-type AlPO₄, and minor quartz phases.
To significantly improve mechanical performance, firing temperatures above 1250°C are recommended to promote mullite crystal formation, which greatly enhances structural strength and thermal resistance.
· Molten metal filtration systems
· High-temperature refractory linings
· Thermal insulation components
· Advanced ceramic filtration media
Q1: What is the ideal density of ADP solution for foam ceramics?
A density around 1.35 g/cm³ provides optimal viscosity and coating performance.
Q2: How can I increase alumina foam ceramic strength?
Optimize ADP concentration and increase sintering temperature above 1250°C to promote mullite phase formation.
Q3: Does ADP affect pore size?
Yes. Increasing ADP concentration reduces pore size and improves structural density.
If you are manufacturing alumina foam ceramics and need stable, high-performance Liquid Aluminum Dihydrogen Phosphate, contact our technical team for customized formulation recommendations, COA, and bulk supply support.
Send us your technical requirements today to receive a fast quotation and application guidance.
