Grade A Fused Silica sand&powder Specifications: 
 
3.   Particle Size Distribution *Pan designates the percentage of fused silica passing the last reported screen for each size.
Fused silica Special Feature:
Fused Silica features extremely low coefficient of thermal expansion,consistent chemistry and carefully controlled particle size distribution.

Fused silica Applications:
Fused Silica are used in industry of thermal ceramic,refractory,investment casting,EMC,solar crucible,quartz marble,powder coating etc.

Fused silica other sizes are available as follows :

 0-1mm 1-3mm 3-5mm,,0.2-0.5mm,0.1-0.5mm,0.212-0.425mm,0.125-0.212mm,-0.044mm,-0.045mm
-10mesh  10-20mesh, 30-50mesh, 50-100mesh,-100mesh,-150mesh,-270mesh,
30-60mesh,60-120mesh,40-70mesh,70-140mesh,100-200mesh,
120F, 200mesh, 325mesh, 400mesh ,600mesh , 800mesh, 1250mesh,etc...
The partice size can be produced as customer's special requirment.  
Fused silica production process
Fused silica is high purity quartz sand that has been melted to form glass. High volume stability, low volumetric expansion and high purity make fused silica a very useful and versatile material for refractory applications, whether in aluminum launders or other highly cyclical applications.

We strictly choosed the high purity silica sand (SiO2>99%) in local Donghai/Xinyi as our raw material. The melted silica sand becomes amorphous silicon dioxide glassy ingot after being fused at high temperature(2000-2300 ºC),and cooling. We further process the products into fused silica lump,sand and powder according to customer's requirements.

   
Fused Silica high clear Pictures:

 
Fused Silica Package and Delivery:
Fused Silica Plastic Woven Bag of 25kg Net each,Then on Pallet:  

Fused silica Factory and Quality Control Pictures:



Fused silica making process 
Fused Silica is made of high purity crystal silica from China Donghai-Xinyi by electrically fusing (fusing temperature 1800-2000ºC) to amorphous Silicon dioxide, then is specially engineered into lumps,cullet, ingots, sand,grain,granular and powder flour form designed for making PV fused silica crucible,thermal ceramic,refractory,EMC investment casting ceramic shell etc.

Fused Silica sand Appearance  and  Specifications:

1): It is forbidden to contain any unfused parts. 

2): It is forbiden to have Foreign material, such as string, plastic line, carbon or wooden material, metal or other outside contaminants.

3): All color dots is forbidden except conditional black dots

4): It is not acceptable that black spot diameter is larger than 2mm.

5): Total black dots quantity should be less than 10 when opening the big bag equal or less than 10 dots per
square meters
Chemsize a leading manufacturer of Fused Silica ( grains & powders ) , which is used as raw materials for Refractory , Investment Casting , Technical Ceramic , EMC filler etc industries , our Fused Silica materials have good feedback from all our customers . 

Chemsize Fused Silica has higher fusion ratio ( Amorphous SiO2 up to 99.9%min ) , low iron (30ppm max) and low impurities , thus the materials have very low coefficient of thermal expansion , high resistance to thermal shock, and very lower electrical conductivity . The special Blending and Sieveing , Grinding stystem , along with Malvern Laser Paticle Size Analysizer , which ensure us always supplying customers most suitable Fused Silica materials . 

We make our fused silica at chemsize using a unique, proprietary electric-arc fusion technique. The result is fused silica of the purest quality in China. It is over 99.9% SiO₂. It is amorphous with a low coefficient of thermal expansion, high resistance to thermal shock, and good size integrity made to ISO-certified standards. Our fused silica is inert; it has excellent chemical stability and extremely low conductivity.
We make the products shown in above. We also make specialty products for specific applications and, when requested, homogeneously-blended products.
Chemsize fused silica has an extremely low thermal expansion coefficient, consistent chemistry and carefully controlled particle size distribution. Our fused silica products are specially engineered grains and powders designed for use in foundry, refractory, investment casting and other special applications. Fused Silica is an extremely insulative material with very low thermal conductivity and with its good thermal shock resistance it is often used in flow control/continuous casting applications (for steel making) and glass rolls.
In investment casting, Teco-Sil is used for its volume stability. Indeed fused silica has an extremely low thermal expansion coefficient and so very tight tolerance castings can be produced, with easy shell removal.

Our standard package is 25kg bag, 48 bags per pallet or jumbag with net weight 1200kgs . We are happy to tailor our shipments for customers who prefer bulk bags of varying sizes.
Fused Silica Applications  
Fused silica can be used to make crucibles that produce solar cells board in the photo-voltaic industry.
Fused silica is used to make rollers, castables, mortars, gunning mixtures and forming tools in the glass industry.
Fused silica is used to make technical ceramic in the thermal resistance industry.
Fused silica is used to make ceramic slurry in investment casting industry.
Acidic acid refractory
Fused silica precast shapes
Fused silica big blocks
Fused slica based ramming mix for coreless induction furnace for melting various grades of steel at high temperatures. Due to its amorphous (non-crystalline) structure, it gives better performance at high temperatures.

Fused silica for resin fillers
Fused silica for EMC fillers
Fused silica for powder coating
Fused silica for fused silica shapes
Fused silica for fused silica unshapes
Fused silica for fused silica castable
Fused silica for fused silica motar
Fused silica for fused silica gunning mix
Fused silica for foundry
Fused Silica for ramming mass
Fused silica for ramming mixes
Fused silica for Fused Silica Bricks/Blocks for Hot Repair Glass Furnace Coke Oven
Ceramic welding material based on fused silica, used in the coking and glass industries.SiO2 approx. 94%
Fused silica for Ceramic welding & hot repairs fused silica

Fused Silica Investment Casting grade  
investment casting, also known as Precision casting or lost-wax process, is used to manufacture products for the automotive, military, aerospace, medical, commercial, and recreational markets.
It is my please to introduce Chemsize fused silica. We are one of the leading suppliers of raw materials and machines used in the investment casting process for the last 30 years. 

Most investment casting foundries use Zircon Flour for making the primary slurry. Zircon continues to be in short supply and the prices are rising. We are thus promoting the use of Fused Silica flour in your primary slurry because of the following advantages:

1) Particle shape - one of the main differences in our quality is better particles shape which is important in a primary slurry.
2) Decrease in material consumption - Fused Silica's density is roughly half of Zircon's density. If you replace 20% Zircon flour in your primary slurry batch with Fused Silica, you'll need lesser material by weight. For example if your slurry mix had 50 kgs of Zircon and we try and replace 10 kgs then you would need to add around 6 kgs of Fused Silica flour to achieve your existing viscosities and flow properties.
3) Increased permeability and porosity - Zircon is very dense. Fused Silica is lighter and does not pack as tightly as Zircon which is why it helps in improving the permeability of your shell. It is also more porous.
4) Easier knock-out - Fused Silica knocks out much easier than Zircon or Alumino-Silicates. This is because of the Cristobalite formation while pouring which easily breaks down upon cooling.
5) Faster leaching and shell removal - the moment you add fused silica in the shell it helps in the leaching process and it is much easier to remove shell materials off cavities and holes.
6) Consistency and sustainability - Our Fused Silica coming from China Lianyungang area(world's biggest area of producing Fused silica) being man-made is highly consistent as opposed to Zircon. We also often face supply issues with Zircon whereas there's no such issue with Fused Silica.
7) Fused Silica is cheaper - the pricing on our Fused Silica is US0.56/kg FOB LIANYUNGANG PORT. 

Fused silica Induction furnace lining ramming material
Summary:The intermediate frequency furnace ramming material is also called the intermediate frequency furnace lining material,intermediate frequency furnace ramming material,intermediate frequency furnace dry vibration material, induction furnace dry ramming and so on. It includes acidic, neutral and alkaline ramming material. the acidic ramming material takes high purity quartz and fused silica as the main raw material, the compound additive as sintering agent. The neutral ramming material takes the alumina and high alumina as main raw materials, the composite additive as sintering agent. The alkaline ramming material takes high purity fused corundum, high purity fused magnesia and high purity spinel as main raw material and the composite additive as sintering agent.
Application areas: the acidic, neutral and alkaline ramming material is widely used in coreless medium frequency furnace and core induction furnace. as lining material of medium frequency furnace,it is used to melt the grey cast iron, nodular cast iron and alloy cast iron, carbon steel, alloy steel, melting of high manganese steel, tool steel, heat-resistant steel, stainless steel, aluminum and its alloy,red copper, brass, cupronickel and bronze and other copper alloys.



FAQ:
Q1. Can I have a sample order for fused silica products?
A: Yes, we'd like to send samples free of charge by TNT/FEDEX/DHL. Mixed samples are acceptable.

Q2. What about the lead time?
A:It is 3-5 days for sending samples
    It is usually within 15 days to delivery orders for quantity within 100mt, 

Q3. Do you have any MOQ limit for fused silica sand order?
A: No.But the less the average cost higher.

Q4. How do you ship the goods and how long does it take to arrive?
A: We usually ship by DHL, UPS, FedEx or TNT. It usually takes 3-5 working days to arrive.
     It depands on the distance by sea.7-40days.

Q5. How to process an order for fused silica powder Products?
A:
1).let us know your requirements or application.
2).We quote according to your requirements or our suggestions.
3).customer confirms the samples and pay deposit for formal order.
4).We arrange the production.

Q6. Is it OK to print my logo on packages?
A: Yes. Please inform us formally before our production and confirm the design firstly based on our sample.

Q7: How to deal with the faulty?
A: Firstly, Our products are produced in strict quality control system and the defective rate will be less 
than 0.2%.
Secondly,If it happened,we shall arrange to send new products to you and pay for all your lost.