Furnace Elements
  Refractory Products
  Tubular Heating Elements
  Cartridge Heaters
  Cast-In Heaters
  Infrared Emitters
  Band and Strip Heaters
  Ceramic Flexible Heaters
  Hot Runner Heaters
  Literature A
  Literature B
 

Black Refractory

SiSiC
 
Application
Tableware, electric ceramics and sanitary ware industry.
Structural parts are widely used in lines as: metallurgy, coal, construction tiles, electronic ceramics, chemical and mechanic industry.

SiSiC
Parameter
SIC
90-92％
Si3N4
0
Free Si
8-10％
Density
≥3.02
Apparent Porosity
<0.1％
Bending Strength @20℃
260 Mpa
Bending Strength @1200℃ 
280 Mpa
 
Elasticity @20℃ 
330 Gpa
 
Elasticity @1200℃ 
300 Gpa
Thermal Conductivity @1200℃
45 w/m.k
Thermal Expansion @1200℃
4.5 K-1×10-6
Thermal Shock Resistance 
Good
Vickers Hardness
2400 Kg/mm2
Fracture Toughness
3.3 MPa m1/2
Acid - Alkali  Resistance
Good
Max Work Temp. 
1380 ℃

RSiC
 
The pure silicon carbide powder is fired at 2450 ℃ in vacuum induction sintering furnace.

RSiC
Parameter
α-SiC
≥99.5％
Si3N4
0
Free Si
0
Density
2.7
Apparent Porosity
15.50%
Bending Strength @20℃
91-101 Mpa
Bending Strength @1200℃ 
 109 Mpa
Bending Strength@1350℃ 
 119 Mpa
Pressure Resistance @20℃ 
 299 Mpa
Thermal Conductivity @1200℃
 36.5 w/m.k
Thermal Expansion @1200℃
 4.70 K-1×10-6
Thermal Shock Resistance 
Good
Max Work Temp. 
 1650℃

NSiC
 
The pure silicon carbide powder and Si powder are reacted and sintered in vacuum induction sintering furnace.
The elements are used in ceramic, electronic, sanitaryware etc industries.

NSiC
Parameter
SiC
≥76％
Si3N4
≥23％
Free Si
0
Density
2.8
Apparent Porosity
13%
Bending Strength @ 20℃
171-179MPa
Bending Strength @1200℃ 
 179MPa
Bending Strength@1350℃ 
 189MPa
Pressure Resistance @20℃ 
 580MPa
Thermal Conductivity @1200℃
 19.6 w/m.k 
Thermal Expansion @1200℃
4.70 K-1×10-6
Thermal Shock Resistance 
Good
Max Work Temp.
 1500 ℃

Reractory Products
 
-Beam
-Roller
-Nozzle
-Bat & Skid Rail
-Protection Tube
-Sagger, Cool Pipe, Sealing Elements & Others

Beam
 
 
Application
It can be used as main beam to bear the load.
Sanitaryware, Al2O3, electronic and other ceramic industries.
 
Standard dimension: mm

Cross Section
Max. Length
 
30 X 30
  
1500
 
30 X 40
  
1600
 
30 X 50
  
1800
 
40 X 40
  
2000
 
40 X 50
  
2200
 
40 X 60
  
3700
 
50 X 50
  
3700
 
50 X 60
  
3700
 
50 X 70
  
3700
 
60 X 70
  
3700
 
60 X 80
  
3700
 
60 X 90
  
3700
Straightness Accurate
≤1.5
 
Side Tolerance
  
+/- 1.0 mm
Length Tolerance 
+/- 2.0 mm
 
Crack
  
None
   
Open Porosity
  
None

Roller
 
 
Standard dimension: mm

Cross Section =OD X ID
Max. Length 
 28 X 18
 1600
 30 X 20
 1700
 33 X 23
 1800
 35 X 25
 1900
 38 X 28
 2200
 40 X 28
 2700
 42 X 30
 2700
 45 X 33
 3700
 50 X 38
 3700
 55 X 43
 3700
 60 X 46
 3700
Straightness Accurate
≤1.5
 OD Tolerance
 +/- 1.0mm
Length Tolerance 
 +/- 2.0mm
 Crack
None
      Open porosity
None
      Circularity    
≤1.0mm

Nozzle
 
 
Standard dimension: mm

Nozzle
Size
Tolerance
OD
40-300
+/- 1.0mm
ID
30-280
+/- 2.0mm
FD
OD + (20--100)
+/- 1.0mm
L
40-600
+/- 3.0mm
T
4~10
+/- 0.5mm

Bat and Skid Rail
 
 
Standard dimension: mm

Cross Section
Wall 
 300 X 300
 7--8
 320 X 320
 7--8
 350 X 350
 7--8
 380 X 380
 8
 400 X 400
 8
 420 X 400
 8
 450 X 400
 8
 420 X 420
8--9
 450 X 450
8--9
 500 X 450
8--9
 500 X 500
8--9
Flatness
≤3.0
 Thickness Tolerance
+/- 1.0mm
Length Tolerance 
+/- 1.0mm
 Crack
None
 Open porosity
None

Protection Tube
 
 
Standard dimension: mm

OD
ID
Max. Length 
15
10
800
20
13
1000
25
17
1250
30
22
1300
32
26
1300
35
27
1400
38
30
1400
40
30
1500
42
32
1500
45
35
1600
48
36
1700
50
38
1800

Sagger, Cool Pipe, Sealing Element and Others
Molybdenum Disilicide Protection Tube=MoSi2 Protection tubes
Density: 5.5-5.6g/cm3
Bend resistance: 15MPa(20℃)
Hardness(HV): 570kg/mm2
Apparent porosity: 7.4%
Water-absorbing: 1.2%
Elongation: 4%
Radiation: 0.7-0.8(800 -2000℃)
Application
A.      Used in glass furnace.
B.      Used as thermocouple protection tube with one end closed.It can avoid  oxygenation,deoxidize or caustic etc.
C.     Works as probe in glass liquid.It can work as platinum wire.
D.     Works as electrode in glass line, no need of water cooling.
Silicon Carbide/NSiC  Brick
 
Radiant Tubes in SiSiC
White Refractory
 
 
- Crucibles & Saggers
- Rollers & Rods
- Plates
 
Alumina Characteristics & Performance

Al2O3
60
75
80
85
92
95
99
99.7
Bulk Density
3
3.1
3.3
3.4
3.6
3.7
3.81
3.85
Bending Strength     Mpa
205
280
215.7
230
312
304
340
370
Thermal Expansion ax10-6 @ 25-800℃
7.1
7.6
7.6
7.6
7.5
7.3
7.6
7.6
Thermal Conductivity  w/m.k 
16
17
17
17
18
20
34
35
Insulation                     KV/mm
10
10
10
10
10
10
10
10
Resistivity @20℃     Ω.cm
＞1014
＞1014
＞1014
＞1014
＞1014
＞1014
＞1014
＞1014
Resistivity @300℃    Ω.cm
＞1013
＞1013
＞1013
＞1013
＞1013
＞1012
＞1010
＞1010
Work Temp.
1350℃
1000℃
1250℃
1290℃
1390℃
1480℃
1600℃
1700℃
Moh Hardness
7.5
7.5
7.5
7.5
8.5
8.8
9
9
Fireproof
1800
1700
1800
1850
1920
2000
2030
2040

Zirconia Characteristics & Performance

ZrO+CaO
≥98．5％
AL2O3
≤0.5％
SiO2
≤0.4％
TiO2
≤0.2％
MgO
≤0.1％
Fe2O3
≤0.09％
Work Temp.
≥1600℃
Buck Density
4.3-4.6
Line Expansion @850℃
0.8-0.9％
Apparent Porosity
22-26％
Bending Strength
≥20MP
Thermal Shock Resistance
≥40 times
Refractoriness Under Load
≥1600℃
Colour
Light Yellow

Crucibles & Saggers

Material : corundum, alumina, magnesia, zirconia, mullite, clay etc.
Application: meltallurgical industry, glass analysis and melting, coal, chemical, ceramic, mineral lines etc. 

   

 
Crumdum Crucibles
 
 
Corundum Crucible Standard Dimension in mm

Top/Bottom DiaXHeight
Wall
Capacity   ml
Shape
25/14 X 20
1.5
5
Conical
30/18 X 30
1.8
10
Conical
30 X 30
1.9
15
Cylinder
33 X 60
1.8
40
Cylinder
34/20 X 38
1.9
20
Conical
40 X 40
2
50
Cylinder
53/40 X 50
2
75
Conical
54/37 X 52
2.5
80
Conical
50×60
2.5
90
Cylinder
55/33 X 60
2
80
Conical
55/48 X 70
2.5
130
Conical
60 X 60
2.3
140
Cylinder
60/39 X 71
2.2
130
Conical
70 X 50
2.3
140
Cylinder
70 X 70
2.5
210
Cylinder
80 X 80
3.3
300
Cylinder
80 X 90
3.3
390
Cylinder
80/65 X 110
3.3
400
Conical
100 X 30
4
180
Cylinder
100 X 100
4
550
Cylinder
100/65 X 120
3.5
620
Conical
100/70 X 145
4.5
800
Conical
110 X 140
4
1200
Cylinder

Zirconia Crucibles
 
Better corrosion resistant to acids-alkalis and abrasion resistance than alumina elements.  Refractory is up to 2200℃.  
Ideal for melting precious metals and super-alloys.
 
 
Zirconia Crucibles Standard Size in mm

Top/Bottom DiaXHeight
Wall
Capacity  ml
Shape
25/14 X 20
1.5
5
Conical
30/18 X 30
1.8
10
Conical
30 X 30
1.9
15
Cylinder
33 X 60
1.8
40
Cylinder
34/20 X 38
1.9
20
Conical
40 X 40
2
40
Cylinder
53/40 X 50
2.5
75
Conical
54/37 X 52
2.5
80
Conical
60/39 X 71
2.5
130
Conical

Very Small Crucible
 
Material: >99% alumina
Min. Wall: 0.2mm-0.3mm
 
 
Standard Size in mm

Diameter
Height
Wall
4.5
7
0.5-0.6
5
3.5
0.5-0.6
5
4
0.5-0.6
5
8
0.5-0.6
5
10
0.5-0.6
5.2
2.5
0.5-0.6
5.2
5
0.5-0.6
5.3
4
0.5-0.6
6.4
8
0.5-0.6
6.5
4
0.5-0.6
6.8
4
0.5-0.6
6.8
5
0.5-0.6
8
3
0.5-0.6
8
6
0.5-0.6
8
12.5
0.5-0.6
12
5
0.5-0.6

Rollers & Rods
 
 
- Fireproof Rollers
- Thermocouple Protection Tubes
- Insulation Pipes
 
Corundum: 95% alumina, 99% alumina, 99.7% alumina
Alumina: 85% alumina
Mullite: 75% alumina
Chemical Ceramic: 40% alumina
Magnesia: 98% magnesia, 99.5% magnesia
 
Application
Aluminium industry, glass furnaces etc.
 
Protection Tubes Standard Dimension
OD: 3mm – 25mm   Wall: 0.5mm– 4mm  Max. Length: 2500mm
 
Insulation Tubes Standard Dimension
OD: 1mm – 8mm   Min. Aperture: 0.5mm  Max. Length: 2600mm
 
Sizes of the both tubes above can be produced on client’s requests.
 
Thermocouples
 
Plates
 
Material: alumina, zirconia, mullite etc.
Types: flat plate, grooved plate, perforated plate, skid rail etc.
 
 
Normal Plates Tech Data
Item
Cordierite  Mullite
Cordierite  Mullite
Cordierite  Mullite
Cordierite  Mullite
Cordierite  Mullite
Cordierite  Mullite
Cordierite  Mullite
Al2O3
45
43
35
38
61
40
38
SiO2
45
49
55
51
32
47
52
MgO
6.5
5
7.5
8
5
6
6.5
Bulk Density
1.9
1.95
1.85
1.9
1.6
2
1.95
Apparent Porosity
28
24
28
28
46
24
26
Bending Strength @20℃   Mpa
12
16
20
12
10
15
12
Bending Strength @1250℃    Mpa
10
11
12
15
9
12
9
Expansion Strength @ 25℃-1000℃ 10-6XK-1
3
3.5
2.6
2.4
3.9
2.4
2.3
Specific Heat @20℃     Kj/Kg.K
1
1
1
1
0.8
1
1
Max.Work Temp. ℃
1300
1300
1300
1350
1300
1250
1250
 
Normal Plates Standard Dimensions
Length
Width
Thickness
Length
Width
Thickness
132
300
6--20
420
420
13-40
150
432
6--20
420
450
13-40
220
240
10--20
420
480
13-40
220
225
10--25
420
550
13-40
260
340
10-40
430
430
13-40
265
600
13-40
440
540
13-40
280
320
10-40
450
450
13-40
280
360
10-40
450
480
13-40
280
580
13-40
450
500
13-40
300
500
10-40
450
600
15-40
320
320
10-40
450
650
15-40
330
450
12-40
460
460
15-40
330
630
13-40
460
480
15-40
340
340
10-40
460
500
15-40
340
400
10-40
480
480
15-40
340
440
10-40
480
500
15-40
<, DIV align=center>350
350
10-40
480
700
15-40
350
400
10-40
500
500
15-40
350
500
12-40
500
520
15-40
360
480
10-40
500
570
15-40
360
700
15-40
500
600
15-40
370
370
12-40
500
650
15-40
370
450
12-40
500
700
15-40
370
500
12-40
520
520
15-40
370
700
15-40
520
600
15-40
380
400
10-40
540
540
15-40
380
420
10-40
540
660
20-40
385
435
12-40
550
550
15-40
390
460
12-40
550

700
20-40
400
400
12-40
600
600
20-40
400
420
12-40
600
680
20-40
400
450
13-40
600
700
20-40
400
500
13-40
610
610
20-40
400
550
13-40
672
750
22-40
400
600
13-40
700
700
22-40
405
530
13-40
750
914
20-40
420
420
13-40
1000
1000
25-40
360
360
10-40
500
550
15-40
 
Alumina Plates
Al2O3: 98%-99.5%    Bulk Density: 3.85  Work Temp: 1750℃
Mullite Plates
 
Al2O3: 88%          Bulk Density: 3.0   Work Temp: 1650℃
SiO2:10%-11%      Fe2O3:0.08%    Max.Work Temp.:1700℃
 
Zirconia Plates
 
Zirconia Plates Standard Dimension=mm
Flat Plates Min. Wall=2.5
Plates with V-Shape Bar  Min. Wall=2.8
Plates with Fence-Bar Min. Wall=3.0
98×98
67×18
58×12
90×90
68×17
109.5×8
86×68
63×18
103×8
86×58
62×25
105×7
83×93
60×18
108×14
80×90
60×11
47×8
80×56
58×14
58×12
76×76
55×26
58×8
72×90
55×14
61×9
72×72
53×21
66×11
66×66
47×10
66×9
61×61
45×18
68×12
135×95
45×11
72×12
115×60
10×18
80×7
112×80
 　
82×11
105×80
 　
88×12
105×60
 　
　
105×105
 　
　
103×103
 　
　
100×64
 　
　
100×100
Other Plates
 　
φ117
Grooved      85×80×15
Sandwich  315×155×12
φ112
V-Grooved  98×93×20
Sandwich  360×155×12
φ100
W-Grooved 190×140×12
Sandwich  210×180×10
φ78
W-Grooved 165×65×12
W-Grooved 190×126×11

Carbon Fibre Felt

Tech data

Other Refractory

 
E-mail: hoteksales@163169.net
Copyright © 2000-2030 Hotek Alliance Limited