Properties

Item

US1250

US1300

US1350

Bulk Density (g/cm3)

≥2.4

≥2.5

≥2.55

Apparent Porosity (%)

22-24

16-20

12-16

Water Absorption %

8―10

5―8

5―7

Bending Strength(Mpa)（R.T.）

45-55

50-60

55-65

Bending Strength(Mpa)（1350℃）

35-45

45-55

50-60

Coefficient of Thermal
Expansion (x10 -6/°C)

5.8

5.7

5.6

Thermal Shock Resistance

Excellent

Very good

Good

Max. Working Temperature (℃)

1250

1300

1350

Modulus of Elasticity(Gpa)

≥110

≥115

≥120

Refractoriness (℃)

≥1700

≥1720

≥1750

Composition

Al2O3 (%)

72-75

70-73

70-73

SiO2(%)

21-24

20-23

20-22

ZrO2(%)

-

4-6

4-7

Fe2O3 (%)

≤0.5

≤0.4

≤0.4

Crystal Phase

Corundum (%)

28-35

30-38

30-38

Mullite (%)

30-50

40-60

40-60

Glass Phase (%)

15-25

10-20

10-20

Allowed

Tolerance

Outer Diameter (mm)

+0.3/-0.5

Roundness (mm)

≤0.5

Length (mm)

+/-3.0

Linearity (mm)

≤0.07% x Length

Application

Glazed Wall/Floor Tile

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Rustic Tile

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Porcelain Tile

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Tableware

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Ferromagnetic Materials

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Advanced Ceramics

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Microcrystalline Tile

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