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Sodium tripolyphosphate(STPP)

1.Property

Ceramic grade sodium tripolyphosphate,white particle or powder,apparent density is 0.35-0.90g/cm3,melting point 622℃.Easily soluble in water,aqueous solution is alkali,and will hydrolyze to orthophosphate,complex with calcium,magnesium,iron and other metal ions and generate soluble complex.Moreover,as inorganic surfactant,it has certain properties of organic surfactant.

 

2.Performance:

This product is mainly used for ceramic body slurry and ceramic glaze paste,it has advantages as: less use amount,higher purity,better peptization,more stable,compared with other STPP or ceramic thinner.

 

3.Effects:

Reduces the viscosity and water content of the slurry,also improve the fluidity,thereby reducing the energy consumption of the ball mill and spray-drying tower,improving production.The powder particles can be graded more reasonable,improve powder consolidated performance, increase the green strength.

 

4.Executive standard:GB/T 9983-2004


5.Quality standard:

Item

Index

Supreme Grade

Grade I

Grade II

Whiteness/%                         ≥        

90

85

80

Phosphorus pentoxideP2O5/%        ≥

57.0

56.5

55.0

STPPNa5P3O10/%  ≥

96

90

85

Water insoluble matter/%               ≤

0.10

0.10

0.15

IronFe/%                        ≤

0.007

0.015

0.030

PH value1% Solution

 

9.2-10.0

 

Granularity

sieving rate is higher than 95% when pass 1.00mm test

 

6.Packing and instruction:N.W.50kgs per bag,or according to customers’ requirement.

 


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