Specialty Fused Silica Lumps for Crucible Manufacturing

• Customization: Available
• Certification: ISO
• Application: Rubber, Ceramic, Casting
• Model NO.: 200 mesh 325mesh D50 3-5,6-9,10-14,15-18 microns
• Type: Quartz
• Fused Silica Sand: 0-1mm,1-3mm,3-5mm,4-10mesh,10-20,20-50,50-100mesh
• Fused Silica Powder: -100,-120f,-150L,200f,270f,325mesh
• Fe2o3: <0.003%
• Al2O3: <0.03%
• Amorphous Sio2: >99%
• Quartz Sio2: <0.1%
• Cristobalite Sio2: <0.1%
• Transport Package: Paper Bag, Plastic Bag, Jumbo Bag, Pallet
• Specification: SiO2>99.9%
• Trademark: Chemsize
• Origin: China Lianyungang
• HS Code: 32074000
• Production Capacity: 10000mt/Year

Product Description

Manufacturer of Specialty Fused Silica Lumps for Crucible Manufacturing. Superior quality and service from Lianyungang Chemsize International Trading Co., Ltd.

Product Description

Specialty Fused Silica Lumps for Crucible Manufacturing by Lianyungang Chemsize International Trading Co., Ltd. Ideal for quartz crucible production and investment casting materials.

1.	Physical Properties
1.1	Composition		SiO2
1.2	Structure		Amorphous
1.3	Colour		Transparent or white
1.4	Melting Temperature		approx.1750ºC
1.5	Specific Gravity		2.21g/cm^3
1.6	Hardness		7 Mohs
1.7	Thermal Expansion		0.5*10^-6
2.	Chemical Properties
		Grade A	Grade B	Grade C
2.1	SiO2	>99.9%	>99.85%	>99.7%
2.2	Al2O3	<100ppm	<150ppm	<0.05%
	The finer the power,the higher the Al2O3,as powder is produced by ball mill with Alumina ball.
2.3	Fe2O3	<30ppm for grain	<60ppm	<0.05%
2.4	CaO	<30ppm	<60ppm	<0.02%
2.5	Na2O	<30ppm	<60ppm	<0.02%
2.6	K2O	<30ppm	<60ppm	<0.02%

Particle Size Distribution

Explore our Specialty Fused Silica Lumps for Quartz Crucible Manufacturing. Ideal for investment casting and refractory applications.

		Standard
		10-20	30-50	50-100	-120	-200	-325
Mesh	Microns
+8	2360	<2
+12	1700	6-25
+16	1180	33-50
+20	850	25-45	<1
+30	600	13	25-40
+40	425		32-45
+50	300		15-30	<13
+70	212			30-60
+80	180		0-11			<1
+100	150			28-51	<10	<1
+140	106			4-16	7-13	<10
+200	75			<2	10-15	<10	<3
+325	45				14-20	15-30	4-11
Pan		<3	<2	<1	45-55	70-80	86-97

Fused Silica

Pan designates the percentage of fused silica passing the last reported screen for each size.

Special Features:

• Extremely low coefficient of thermal expansion


• Consistent chemistry


• Carefully controlled particle size distribution

Applications:

• Thermal ceramic industry


• Refractory industry


• Investment casting


• EMC applications


• Solar crucible manufacturing


• Quartz marble production


• Powder coating

Available Sizes:

• 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 particle size can be produced as per customer's special requirement.

Company name: Lianyungang Chemsize International Trading Co., Ltd.

Third Party Test Report

Production Process

Fused Silica Production Process

Fused silica is a high-purity quartz sand that has been melted to form glass. Its high volume stability, low volumetric expansion, and high purity make fused silica a versatile material for refractory applications, such as aluminum launders.

At Lianyungang Chemsize International Trading Co., Ltd., we carefully select high-purity silica sand (SiO2 > 99%) from Donghai/Xinyi as our raw material. The silica sand is melted at high temperatures (2000-2300 ºC) to form amorphous silicon dioxide glassy ingots, which are then processed into fused silica lumps, sand, and powder according to customer specifications.

Detailed Photos

Specialty Fused Silica Lumps for Quartz Crucible Manufacturing. Ideal for investment casting and refractory applications.

Packaging & Shipping

Specialty Fused Silica Lumps for Crucible Manufacturing in 25kg plastic woven bags on pallets. Ideal for quartz crucible production.

Explore our Specialty Fused Silica Lumps for Quartz Crucible Manufacturing. High-quality raw material for refractory applications.

Fused Silica Product Description

Fused Silica Making Process

Fused Silica is produced from high purity crystal silica sourced from China Donghai-Xinyi. It is electrically fused at temperatures ranging from 1800-2000ºC to create amorphous Silicon dioxide. The resulting material is engineered into various forms such as lumps, cullet, ingots, sand, grain, granular, and powder flour. These forms are specifically designed for manufacturing PV fused silica crucibles, thermal ceramics, refractories, EMC investment casting ceramic shells, and more.

Fused Silica Sand Appearance and Specifications:

• Must not contain any unfused parts.


• Foreign materials like string, plastic, carbon, wood, metal, or other contaminants are strictly prohibited.


• Only conditional black dots are allowed; other color dots are forbidden.


• Black spot diameter should not exceed 2mm.


• Total black dots quantity should be less than 10 per square meter.

FAQ:

Q1: Can I request a sample order for fused silica products?

A: Yes, we offer free samples shipped via ***/FEDEX/DHL. Mixed samples are also acceptable.

Q2: What is the lead time for samples?

A: Samples are typically sent within 3-5 days.

Q3: Is there a minimum order quantity for fused silica sand?

A: No, but lower quantities may result in higher average costs.

Q4: How are the goods shipped and what is the delivery time?

A: We usually ship via DHL, UPS, FedEx, or ***, with delivery in 3-5 working days. Sea shipments may take 7-40 days depending on the distance.

Q5: What is the process for ordering fused silica powder products?

A:

1. Provide your requirements or application details.


2. We will offer a quote based on your needs or suggestions.


3. Confirm samples and pay a deposit for the formal order.


4. We will proceed with production.

Q6: Can my logo be printed on the packages?

A: Yes, please inform us before production and confirm the design based on our sample.

Q7: How are faulty products handled?

A: Our products undergo strict quality control, with a defective rate of less than 0.2%. In case of any issues, we will replace the products and cover any losses.

For any inquiries, please contact Lianyungang Chemsize International Trading Co., Ltd.