Why Is Sodium Tripolyphosphate Need To Be Add in Ceramic Production?

Why is sodium tripolyphosphate need to be add in the ceramic production process? This seemingly common problem,but many people don’t know about the reason during the ceramic production process.

Sodium tripolyphosphate is used as a thickener and lubricant to help ceramic raw materials bond together better to form a uniform ceramic body. It can also improve the hardness and toughness of ceramic products, prevent cracks and deformation, and solve problems in ceramic production. Many difficulties in crafting.

Sodium tripolyphosphate is a phosphate chemical substance that can be widely used in food, medicine, cosmetics and other industries as a buffer, chelating agent and emulsifier.

1. Dispersion

The system formed after solid particles are dispersed in a liquid medium should belong to the colloid category. This system is thermodynamically unstable and the particles have a tendency to agglomerate. At this time, adding sodium tripolyphosphate interacts with the surface of the ceramic particles to prevent them from agglomerating with each other, which can prevent the particles from agglomerating and make the components of the raw materials evenly dispersed in the liquid medium.

2. Suspension effect

Some solid particles that are insoluble or slightly soluble in water can be dispersed relatively evenly in the liquid medium with the help of sodium tripolyphosphate, forming a small, highly suspended, flowable, stable liquid-solid system to improve the suspension of the slurry. The role of stability. The mechanism of suspension stabilization is actually similar to that of dispersion. In fact, various suspension stabilizers can also be used as dispersants for ceramic slurries, but dispersants are mainly used in slurries, while suspension stabilizers are mainly used inglaze slurries. It has a thickening effect on glaze slurry and is an additive to prevent glaze slurry from settling.

3. Water reducing effect

The water-reducing effect of sodium tripolyphosphate is to improve the performance of the slurry so that the slurry has appropriate viscosity, good fluidity and high solid content under low moisture conditions, so as to facilitate operation and achieve the purpose of energy saving and consumption reduction. . The dispersion mechanism of ceramic water-reducing agent can be roughly divided into four types: electrostatic repulsion stabilization; steric hindrance stabilization; electrostatic steric hindrance and stabilization. The system formed after clay particles are dispersed in a liquid medium is a colloid. This system is thermodynamically unstable. The particles will attract each other and agglomerate. The ceramic additives prevent the agglomeration of each other by interacting with the surface of the ceramic particles, which can Play the role of preventing particle agglomeration.

4. Enhancementeffect

In the ceramic production process, some kaolin with poor texture has poor plasticity or improves the strength of the initial product. Sodium tripolyphosphate can be used as a ceramic reinforcing agent to build bridges between ceramic particles, produce cross-linking effects, and form an irregular network structure; at the same time, being wrapped on the surface of the particles will also cause hydrogen bonds between the particles to greatly enhance the strength of the product. 

Henan Zhenglin New Material is a high-tech environmental protection enterprise integrating R&D, production, sales and application technology services. It is committed to providing customers with high- quality water treatment chemicals,phosphate chemical products and so on.

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