E-mail: sweetie@newthinkchina.com
Contact Us
Qingdao Newthink New Materials Co.,Ltd
Add: No.230 Changjiang Middle Road, Qingdao, Shandong, China
Tel: +86 532 86941661
Fax: +86 532 86941661
Email: sweetie@newthinkchina.com
Web: www.newthinkchina.com

Sic Refractory Plate

the silicon carbide slabs combined with black silicon carbide and ceramic, using semi-dry molding process,its product performance can reached the foreign products performance index level , the kiln slab introduced in our factory have a good effect.

Chat Now

In the late 1970s and early 1980s, China began to develop SIC refractory plate and achieved certain results. Since 1998, our factory has researched and discussed the production process of silicon carbide slabs, and gained certain experience. According to the production process described as follows:

详情页图1

1.Raw material selection and processing

Many domestic and foreign manufacturers use black silicon carbide raw materials, which are cheap and have good oxidation resistance. The choice of silicon carbide particle size has a great influence on the oxidation resistance of the product. According to the research of Hunan University, the finer the raw material, the easier it is to be oxidized. The particle size of silicon carbide selected by our factory is as follows:

Grain composition

Screen size

%

Screen size

%

Screen size

%

Screen size

%

Screen size

%

16#

>12

0

12-16

20

16-18

50

20-24

78

<24

4

24#

>16

0

16-24

20

21-30

50

30-36

76

<36

4

80#

>60

0

60-80

25

80-100

45

100-120

73

<120

4

150#

>80

0

80-150

15

150-180

35

180-240

65

<280

4

2.Blank preparation   

Since silicon carbide has the disadvantage of being easily oxidized, and considering the ability of the SIC refractory plate to have high thermal stress and bending resistance against thermal gradient, appropriately increasing the critical grain size of the silicon carbide plate can reduce its oxidation rate and improve its thermal stability.

3.Molding

The steel mold semi-dry forming process is applied to the high-tonnage hydraulic press and vibration forming machine, the forming pressure is required to be 600-800kgfcm2. In order to reduce the pressure transmission deviation during the pressing process,use volatile kerosene lubrication molds to reduce friction during molding,the density of the formed embryo body is required to reach 2.6g/cm3, the dimensional error of the product is required to be controlled within ±0.5%, and the flatness is required to be controlled within the range of 0.2-0.5%.

4.Drying and firing

The silicon carbide slab is dried by the introduced cyclone dryer to make the residual moisture of the embryo body reach 1%. The drying system of various embryo bodies is as follows:

Thickness

3-5cm

<3cm

>5cm

Drying temperature

90-105

105

Dry with cold air for 2-4 hours, then dry with hot air, temperature is 90-100 ° C

Drying time:hour

8-12

4-8

12-16

5.Main technical data

The main technical data of the SIC refractory plate is as follows:

Item

Unit

Data

Max. working temperature

1380

Density

g/cm3

≥3.02

Porosity

%

<0.1

Bending strength

MPa

250(20℃)

Bending strength

MPa

280(1200℃)

Modulus of elasticity

GPa

330(20℃)

Modulus of elasticity

GPa

300(1200℃)

Thermal conductivity

W/m.k

45(1200℃)

Coefficient of thermal expansion

K-1×10-6

4.5

Rigidity


13

Acid alkaline-proof


Excellent

详情页图片3

Practice has proved that the silicon carbide slabs combined with black silicon carbide and ceramic, using semi-dry molding process,its product performance can reached the foreign products performance index level , the kiln slab introduced in our factory have a good effect.


Hot Tags: sic refractory plate, suppliers, manufacturers, price, for sale
Related Products
Inquiry
Copyright © Qingdao Newthink New Materials Co.,Ltd All Rights Reserved.