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Surface Tension Calculation of Enamel Frit

Surface Tension Calculation of Enamel Frit

(Summary description)Surface tension is a very important property in the two production links of enamel slurry preparation and enamel coating.

Surface Tension Calculation of Enamel Frit

(Summary description)Surface tension is a very important property in the two production links of enamel slurry preparation and enamel coating.

Information

Surface tension is a very important property in the two production links of enamel slurry preparation and enamel coating. Surface tension (or interfacial tension) is a force that affects the inward contraction of liquids, because molecules will always try to lower their surface, if it is a small part of a liquid, will try to be spherical, so the more surface tension the liquid has. The larger the size, the greater the tendency to form a spherical shape.

In the process of melting or firing enamel frit, there will be a process of converting from solid to liquid. In the process of enameling, the enamel with high surface tension will come into contact with the metal body, while the enamel with low surface tension will be in contact with the air on the surface.

According to this characteristic, the manufacturer of enamel frit has designed the oxide composition in the enamel frit formula, and established the relationship between glass oxide and surface tension. The enamel frit can be predicted by calculating the surface tension factor of the enamel raw material. The surface tension of , and these calculation factors are calculated in percentage units, the following lists some calculation surface tension factors:

 

Metal oxides

MoO3

Cr3O3

K2O

B2O3

Na2O

TiO2

SiO2

ZrO2

CoO/NiO

Al2O3

MgO

Surface tension

-10

-5.9

0.1

0.8

1.5

3.0

3.4

4.1

4.5

6.2

6.6

 

Surface tension range of some enamels:

Aluminum enamel=170~250 MN/M

Cover coat=220~250 MN/M

Ground coat=240~300 MN/M

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Copyright © Hunan Noli Enamel Co., Ltd.    
湘ICP备17005568号-1      www.300.cn