China 30 50 50 100 200mesh Fused Silica for Investment Casting

Investment Casting Grade Fused Silica Specifications:

1.Physical Properties1.1CompositionSiO21.2StructureAmorphous1.3ColourTransparent or white1.4Melting Temperature approx.1750ºC1.5Specific Gravity2.21g/cm31.6Hardness 7 Mohs1.7Thermal Expansion 0.5*10-6
2.
Chemical PropertiesInvestment Casting Grade2.1SiO2>99.85%2.2Al2O3<100ppmThe finer the power,the higher the Al2O3,as powder is produced by ball mill with Alumina ball.2.3Fe2O3<60ppm for grains
<100ppm for powder2.4CaO<30ppm2.5Na2O<30ppm2.6K2O<30ppm

3.Particle Size Distribution

Standard 10-2030-5050-100-120-200-325MeshMicrons+82360<2 +1217006-25 +16118033-50 +2085025-45<1 +306001325-40 +40425 32-45 +50300 15-30<13+70212 30-60+80180 0-11 <1 +100150 28-51<10<1 +140106 4-167-13<10 +20075 <210-15<10<3+3254514-2015-304-11Pan <3<2<145-5570-8086-97

*Pan designates the percentage of fused silica passing the last reported screen for each size.
Fused Silica Pictures:
Package and Delivery:
Paper bags


Plastic Woven Bag of 25kg Net each,Then on Pallet:

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
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!