Product Code :
With the development of power battery, lithium cobalt oxide (LCO), ternary materials Nickel cobait lithium manganate (NCM), lithium manganese oxide (LMO) and lithium iron phosphate (LFP), which are the positive materials for commercial production of lithium battery, need high-temperature sintering in the preparation process. During hightem-perature sintering, strong alkaline corrosive gas will be volatilized, reaction bonded silicon carbide rod contains 10- 16wt% Si, which will react with the volatile corrosive gas at high temperature. The service life of the stick is greatly reduced and the maintenance cost of the kiln is increased.
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Product Information
The pressureless sintered silicon carbide rollers does not contain metal Si, and the bulk density can reach more than 97% of the theoretical density. The service life under the same working condition is 5 times that of the reaction sintered silicon carbide, and is nearly 10 times of the life of silicon nitride bonded silicon carbide. It is nearly 15 times the service life of recrystallized sintered silicon carbide.
Synonyms
methanidylidynesilicon; Carborundum; Silicon monocarbide; Betarundum Carborundeum; carbon silicide; Green densic
Silicon Carbide Rollers (SSiC) Specifications
Dimensions
Per your request or drawing
We can customized as required
Properties（Theoretical）
The physical properties of pressureless sintered silicon carbide ceramics products
| Physical properties | UNIT | SSIC |
| （Composition：SiC） | vol % | ≥ 98 |
| Density 20°C | g/cm³ | ＞3.10 |
| Open Porosity | Vol % | 0 |
| （Hardness) 45N | R45N | 93 |
| （Hardness) HV1 | kg/mm² | 2350 |
| （Flexural Strength 20°C) | MPa | 320-400 |
| （Flexural Strength1300°C) | MPa | 360-410 |
| Coefficient of thermal expansion | 10-6K-1 | 4 |
| （Thermal Conductivity 20°C ) | Wm -1K-1 | 116 |
| （Thermal Conductivity 1200°C | Wm -1K-1 | 35 |
| （Modulus of Elasticity @ RT ) | GPa | 410 |
| Thermal shock resistance ) | Excellent | |
| （Max. Service Temp (air) ) | °C | Approx. 1600 |
| Electrical Resistivity | Ω-m | 1 to 4 10x |
| Specific Heat | J/kg-K | 670 to 1180 |
| Tensile Strength | MPa (Ultimate) | 210 to 370 |
| Young's Modulus | GPa | 370 to 490 |
| Exact Mass | 39.976927 | |
| Monoisotopic Mass | 39.976927 |
Corrosion test results in liquids
Test Environment mg/cm2 yr）* Corrosive Weight Loss
| （wt%）Conc. Reagent | Temp. (˚C) | Sintering SiC (NO Free S i) | Reaction Bonded SiC (12%Si) | Tungsten Carbide (6% Co) | Aluminum Oxide (99%) |
| 98%H2SO4 | 100 | 1.8 | 55.0 | ＞1000 | 65.0 |
| 50%NaOH | 100 | 2.5 | ＞1000 | 5.0 | 75.0 |
| 53%HF | 25 | <0.2 | 7.9 | 8.0 | 20.0 |
| 85%H 3 PO 4 | 100 | <0.2 | 8.8 | 55.0 | ＞1000 |
| 70%HNO 3 | 100 | <0.2 | 0.5 | ＞1000 | 7.0 |
| 45%KOH | 100 | <0.2 | ＞1000 | 3.0 | 60.0 |
| 25%HCl | 70 | <0.2 | 0.9 | 85.0 | 72.0 |
| 10%HF plus NO 3 | 25 | <0.2 | ＞1000 | ＞1000 | 16.0 |
Test Time:125 to 300 hours of submersive testing, continuously stirred.
Corrosion Weight Loss Guide:
>1000 mg/cm2 yr Completely destroyed within days.
100 to 999 mg/cm2 yr Not recommended for servicegreater than a month
50 to 100 mg/cm2 yr Not recommended for servicegreater than one year
10 to 49 mg/cm2 yr Caution recommended, basedon the specific application.
0.3 to 9.9 mg/cm2 yr Recommended for long term service
<2mg/cm2 y Recommended for long term service; no corrosion, other than as a result of surface cleaning, was evidenced.
Comparison of Technical Data for Different Silicon carbide material
| Items | Unit | RBSiC | SSiC | RSiC |
| Max. Service Temp (air) | ℃ | 1380 | 1650 | 1650 |
| Density | g/cm³ | ≥3.02 | ≥ 3.10 | 2.60-2.74 |
| Open Porosity | % | < 0.1 | 0 | 15 |
| Bending Strength | Mpa | 250 （20℃ ） | 380 | 100 |
| Mpa | 280 (1200 ℃) | 370 | 120 | |
| Modulus of Elasticity | Gpa | 330 （20℃ ） | 350 | 240 |
| Gpa | 300 (1200 ℃) | 300 | 200 | |
| Thermal Conductivity | W/m.k | 40 (1200 ℃) | 35 | 10 |
| Coefficient of Thermal Expansion | K -1 × 10-6 | 4.5 | 4.2 | 4.8 |
| HV0.5 | 2200 | 2500 | / | |
| SiC Content | % | 85 | 98 | 98.5 |
| Si Content | % | 15 | 0 | 0 |
| Acid Alkaline-proof | General | Excellent | Superior |
Advantages
-High hardness, Mohs hardness rating of 9
-High thermal conductivity
-High-temperature strength
-Its electrical conductivity between that of metals and insulating materials
-Wear resistant
-Corrosion resistant
-Lightweight
– Low Density
-High Young’s modulus
-Low thermal expansion coefficient
-Resistance to chemical reaction and thermally resistant
-Outstanding thermal shock resistance
-Refractive index greater than a diamond
Applications of Silicon Carbide Rollers
– A promising substitute for traditional semiconductors such as silicon in high-temperature applications.
-Grinding wheels and abrasive paper and cloth products
-High-temperature bricks and other refractories
-Abrasive and cutting tools
-Structural material
-Automobile parts
-Electronic circuit elements
-Thin filament pyrometry
-Catalyst support
SSiC rollers is the mainly damageable part that need to be replacement frequently for roller kiln,its quality directly affects the normal operation of the kiln and the yield and quality of the ceramic products. With the rapid development of the international construction industry,the demand of architectural ceramics,sanitary wares and domestic ceramics are increasing,thus the roller kiln with fast burning,energy saving and high automation degree are widely used in ceramic industry,especially produce the ceramic SSiC ceramic rollers. With the increase of application range and quantity of roller kiln,the requirements of some parts in roller kiln are also improved. SSiC ceramic rollers as the key part of roller kiln,its function is supporting and conveying calcined ceramic products under high temperature sintering process. The technical parameters of SiSiC ceramic rollers directly affected the application performance,quality and yield of calcined ceramic products. Performance requirements of ceramic SSiC ceramic rollers in roller kiln: Because the sintering temperature is above 1250ºC in roller kiln,so it needs kiln furnitures to support and transport the ceramic products under high temperature,silicon carbide ceramic SSiC ceramic rollers is the kiln furniture that support and transport the ceramic products under high temperature,help to complete the entire firing process. So SSiC ceramic rollers is the important part for roller kiln,its quality directly affects the normal operation of the kiln and the yield and quality of the ceramic products. The length of SSiC ceramic rollers determines the effective kiln width,roller roundness and straightness will affect the quality of the product sintering and operating rules,thermal shock resistance will affect the service life of silicon carbide roller rod and the factory's production costs. The high temperature strength of the SSiC ceramic rollers is the basis for bearing product weight,while the refractoriness and high temperature load softening point of silicon carbide roller determine the max operation temperature of the roller kiln.
Packing of Silicon Carbide Rollers
Standard Packing:
Sealed bags in carton boxes. Special package is available on request.
As a ceramic material, Silicon Carbide is quite fragile in a lot of cases. The Silicon Carbide Rollers are usually held in plastic bags by vacuum, and protected with heavy foam.
ATTs’ Silicon Carbide Rollers is carefully handled to minimize damage during storage and transportation and to preserve the quality of our products in their original condition.
Chemical Identifiers
| Linear Formula | SiC |
| MDL Number | MFCD00049531 |
| EC No. | 206-991-8 |
| Beilstein/Reaxys No. | N/A |
| Pubchem CID | 9863 |
| IUPAC Name | methanidylidynesilicon |
| SMILES | [C-]#[Si+] |
| InchI Identifier | InChI=1S/CSi/c1-2 |
| InchI Key | HBMJWWWQQXIZIP-UHFFFAOYSA-N |
| CAS | 409-21-2 |
