Fused Silica for Refractory and Investment Casting in Grains and Powder Sizes

Fused Silica is a high-purity amorphous silicon dioxide material produced through high-temperature melting and processing. It is used in applications where heat resistance and low thermal expansion matter.

We supply fused silica in both grains and powder for customers in refractory, investment casting, ceramics, foundry, and related industrial uses.

The key value of fused silica is not only purity, but also consistent quality, application suitability, and supply reliability. That is why we focus on stable raw material selection, controlled production, and practical support for different industries.

Common sizes include:

• 0-0.5 mm
• 0.5-1 mm
• 0-1 mm
• 1-3 mm
• 3-5 mm
• 10-20 mesh
• 30-50 mesh
• 50-100 mesh
• 120F mesh
• 200 mesh
• 325 mesh

Some customers already know the exact size they need. Others start from the application and want to discuss the suitable option first. We can work with either.

If you already have a target specification, we can follow it. If not, we can start from your application and discuss a practical option.

 

For fused silica, the main point is simple: the delivered material should match the confirmed requirement.

We pay attention to the things customers usually care about most:

• particle size distribution
• chemical composition
• appearance and cleanliness
• packing condition before shipment

Before production and shipment, we prefer to confirm the important details clearly, such as application, size range, packing, and any specific testing requirement.

This helps avoid unnecessary mistakes and makes the order easier for both sides.

 

We offer common export packing options such as:

• 25 kg plastic woven bag or paper bag,
• 1350kg max jumbo bags
• Pallet and shrink

Packing can be arranged based on customer preference and shipment plan.

Some customers prefer small bags for easier handling. Others prefer jumbo bags for factory use. Marking can also be adjusted for easier identification after arrival.

Before shipment, we pay attention to practical details such as:

• correct product name and size marking
• proper bag condition
• clean packing appearance
• loading arrangement

We understand that customers are not only buying the material itself. They also want goods that are easy to receive, store, and use after arrival.

 

Lianyungang Chemsize International Trading Co., Ltd. focuses on fused silica and related industrial mineral products.

We prefer clear and practical communication. Most inquiries are straightforward: size, application, packing, sample, and whether future orders can follow the same basis after testing.

That is also how we like to work - step by step and with clear confirmation before production.

We are happy to discuss:

• size selection
• grains or powder
• packing options
• sample testing
• repeat orders after trial shipments

If you are looking for fused silica for refractory, investment casting, ceramics, foundry, or related applications, feel free to send us your requirement. We will be glad to discuss a suitable option with you.

 

Fused silica production process

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 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
-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 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

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.

Any question,kindly contact us please!