High Purity Black Silicon Carbide / SIC 90

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25 m.t.
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3000 m.t./month

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Product Description:

High Purity SiC for Refractory Black Color

High Purity Black Silicon Carbide / SIC 90


Product name

Silicon Carbide (Carborundum ) / SiC / Black Silicon   Carbide / Green Carbide Silica

Model No


Brand name







Black Silicon   Carbide is produced with high   temperature in a electric resistant furnace from a mixture of quartz sand and   petroleum coke.


Its hardness is between that of fused   alumina and synthetic diamond and mechancial intensity of it is also greater   than that of fused alumina. It is brittle and very sharp and  has a   certain degree of electrical and heat conductivity.


Black silicon carbide is typically used for   working on cast iron ,non-ferrous metals, stone, leather, rubber, and other   materials which requires sharp cutting characteristics. The mineral is also   used widely as a refractory material and metallurgical additive. 






1.          raw   materials are of high quality: pure silicon carbide, guaranteeing the   products’ good quality.

2.          sharp   knife-edge, having cutting function.

3.          Centralized   and uniform particle size distribution

4.          electrical   conductivity 

5.          heat   conductivity

6.          chemical   stability

7.          high   thermal conductivity,

8.          low   expansion coefficient

9.          good   abrasion-resistance







·           The   shape: polygon

·           Color:   black

·           Proportion:3:2

·           Bulk   density:1.45-1.56 g/m³

·           Mircohardness:2840-3320g/mm2

·           Mosh   hardness: 9.15

·           Package:   25\kg

·           SiO≥92.5%

·           Free   C≤0.3%

·           Fe2O3≤1.2%



·           Black   silicon carbide, sic≥98.5%,its toughness is better than green  silicon   carbide, mostly for processing low tensile strength of the materials, such as   glass, ceramics, stone, refractory materials, cast iron and non-ferrous   metals.

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By sea, by air, by express

Delivery time

Within 7 days from the receipt of payment

Loading seaport



25kg/bag with woven bag, 40bags per pallet, or according customers' request

Price term

FOB Shenzhen, CFR,, CIF, FCA, EXW ect

Payment term

100% T/T in advance(negotiation)





Product Pictures:


High Purity Black Silicon Carbide / SIC 90

High Purity Black Silicon Carbide / SIC 90High Purity Black Silicon Carbide / SIC 90

High Purity Black Silicon Carbide / SIC 90

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Q:How many hours of the fire endurance time of the rock wool laminboard?
This is depending on the fire rating, about two hours and the better one, 5 hours.
Q:How long usually will the A-level fireproof materials prevent the flame?
The classification of A-level materials is based on GB8624 - 2006 building materials and products combustion performance of grading method. Specific technical requirements are: 1, temperature ≤30 degrees; mass loss rate ≤50%; continuous burning time is 0; 2, the gross calorific value of main components, overall products, external non-substantial components ≤2.0MJ / kg; any internal non-substantial component ≤1.4MJ / kg;
Q:In entering fire door, which material does well?
Entering door has two kinds: security doors, fire security door. The pure fire door does not have anti-theft function. In the relevant technical standards of fire doors : when in the fire, it can make residents in a few seconds or 1 minutes forget to open the door... The material of fire door, fire door has steel fire door and wooden fire door. There is no doubt that wooden fire door can't be used as entering door. In the steel fire door, two layers of steel plate in the clip is flame retardant material.
Q:Why should graphitic refractory materials be used now that graphite can burn?
C is inactive in nature. Carbon will not burn unless the temperature is about 2000℃, so it can't be lit generally. Coal can be lit because it contains other combustible substance which ignite carbon indirectly. While graphite, carbon black, is more pure and dense than coal., so it is hard to oxidize.Their molecular structures are also different, just like diamond is harder than graphite.
Q:What dose the fireproof and thermal insulation material include?
It includes A1: Non-combustible inorganic monomer; A2 Non-flammable organic compound, namely composite material; A3 Modified phenolic fireproof materials.
Q:how long is the fire endurance of plasterboard?
Gypsum board is flame retardant materials, combustion performance rating B1, but when mounted on a steel joist, it can be seen as rating A(non-combustible material) . So it is fine to use as a ceiling. You can randomly choose several samples to run some tests at the quality inspection insititute and the quality of these samples are subject to the testing results.
Q:What refractories can withstand high temperature above 2100 degrees?
But the price is more expensive, while the insulation performance is not as good as common materials. Is there a material that can withstand 2100 ℃? Currently, the long-term use temperature of the best refractory bricks is about at 1800 ℃, while materilas that can withstand a temperature of 2100 ℃ are relatively rare in the production.
Q:What are the characteristics of phenolic resin as a refractory material?
Q:Is the ball mill used in production of refractories?
Refractory is a kind of non-metallic material that is of resistance to thermal shock and chemical erosion, low thermal conductivity and low expansion coefficient. The refractoriness of the refractory is not less than 1580℃. The usage of the refractory is broad. Refractory materials include refractory bricks and powders. Abandoned refractory bricks can be recreated as new bricks after they are crushed by a crusher and grinded by a ball mill. The ball mill and crusher are needed to grind and crush the material in the production of the refractory. The ball mill produced by Zhengzhou Xinhai Machinery Manufacturing Co. has excellent performance and there are many successful cases in Inner Mongolia, Heilongjiang and Guangdong. At the request of the national environmental policy, the company adjusts the equipment details, allowing the equipment to ensure the volume of production while reduce energy consumption.
Q:Who knows the external wall thermal insulation materials fire rating requirements?
The requirements of Department of Housing and the Ministry of Public Security No. 46: Residential buildings: the height of building is greater than 100 meters, the combustion performance of insulation materials should be level A. The other civil buildings: 24≤ height

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