High Purity Nano Sio2 Powder Silicon Dioxide Hydrophilic Fumed Silica CAS NO.7631-86-9

High Transparency: SiO2 is transparent across a wide spectral range, from UV to IR, making it ideal for optical applications.

Excellent Insulating Properties: With high dielectric strength and low electrical conductivity, SiO2 is a perfect insulator for microelectronics and semiconductor applications.

High Melting Point: SiO2 has a melting point of approximately 1,713°C, making it suitable for high-temperature deposition processes.

Chemical Stability: SiO2 is highly resistant to most acids, bases, and solvents, offering long-lasting protective coatings.

Mechanical Strength: It provides excellent hardness and durability, ensuring the stability and longevity of thin films.

Silicon Dioxide CAS: 112945-52-5

Product Name: Silicon Dioxide

Other Names: Silicon oxide

CAS No.: 112945-52-5

EINECS: 238-878-4

MF: SIO2

Purity: 99%min

Appearance: White flocculent powder

Particle size: 15nm/30nm/50nm/300nm/500nm/5um/10um/25um  Can be supplied according to customer requirements.

Specification

Property	Details
Material	Silicon Dioxide (SiO?)
Purity	≥ 99.9%
Shape	Pellets
Size	Typically 1-6 mm in diameter, customizable sizes available
Density	2.65 g/cm³
Melting Point	1,713°C
Optical Properties	High transmission from UV (150 nm) to IR (up to 5 μm)
Deposition Methods	Suitable for thermal evaporation, electron-beam evaporation, and sputtering
Refractive Index	~1.46 (at 550 nm wavelength)

SiO2 (Silicon Dioxide) is a widely used evaporation material in thin-film deposition processes, particularly in the production of optical coatings, dielectric layers, and semiconductor devices. It is commonly employed in thermal and electron-beam evaporation methods due to its high melting point and stable properties.

Application

1. Optical Coatings: SiO2 is extensively used for anti-reflective coatings (AR), high-reflective coatings (HR), and protective layers in various optical components such as lenses, mirrors, and windows.

2. Dielectric Layers: It serves as an insulator in semiconductor devices and microelectronics, providing an effective dielectric barrier in integrated circuits.

3. Protective Coatings: SiO2 thin films are used as protective coatings for preventing corrosion, wear, and chemical damage on various surfaces.

4. Photovoltaic Devices: Silicon dioxide is used in solar cells as a passivation layer, improving efficiency by reducing recombination of charge carriers.

5. Waveguides: SiO2 is employed in optical waveguides and fiber optics due to its low optical absorption and high transparency in a wide wavelength range.

Packaging & Delivery

Welcome to contact us to get complete COA.

Shanghai Lonwin Chem is a leading manufacturer and supplier of chemicals in China.We develop, produce and distribute high quality pharmaceuticals, intermediates, special chemicals and other fine chemicals. 

We could give you: 

1. Best quality in your requirement 

2. Competitive price in China market 

3. Mature Technical support 

4. Professional logistic support 

All we want is win-win business. Send yr. inquiries, you will get it!

Storage:

keep container tightly closed in a dry and well-ventilated place.

Packing:25kgs/bag or 25kgs/drum

Weight	Packing
<25KG	By foil-alum bag/pap/bottle
≥25kg	Package: 25kg/drum/bag or as your request

Company Profile

Shanghai Lonwin Chemical Co., Ltd. is a company committing to contract synthesis and production of photoinitiators, fluorocarbon surfactants, indicators, intermediates and APIs.Our company has ISO and REACH international certification, in Jiangsu, Anhui and other places with decades of cooperation of OEM processing plants, to provide a more solid support for the customized production service of special chemicals.

Now, our products are well sold in North America, Europe, Japan, South Korea and the Middle East, and customers are highly satisfied with our products and service!

To achieve sustainable and steady development, we establish closely cooperative relationships with famous universities and institutions of China. We regularly exchange information with them and make cooperation on the R&D of new technologies.

Sticking to the business philosophy of "quality first, credit first, service first, creativity first", we are doing our best to meet demands of customers all around the world. We sincerely welcome your visit and business, and look forward to cooperating with you for expanding international market together!

FAQ

Q1: Have your Product Quality been Approved by Third Party Lab ?

A: Yes, All products are strictly tested by our QC, confirmed by QA and approved by third party lab in China. So you will be assured with Good Quality if you choose us. 

Q2: How do you treat quality complaint?

A: First of all, our QC department will do strict examination of our export products by HPLC, UV, GC,TLC and so on in order to reduce the quality problem to near zero. If there is a real quality problem ,caused by us, we will send you free goods for replacement or refund your loss.

Q3: How to cooperate with us?

A: You can contact us for cooperation through the website contact information, or contact with the salesmen in our company. We will connect you about the specific detail via email. 

Q4: Do you Accept Sample Order?

A: Yes, we accept small order from 10g, 100g and 1kg for your evaluation quality of our goods.

Q5: Is there any discount?

A: Yes, for larger quantity, we always support with better price. 

Q6: How long does it take to the goods arrived?

A: It is Depending on your location. For small order, please expect 5-7 days by DHL,UPS,TNT, FEDEX, EMS. For mass order, please allow 5-8 days by Air, 20-35 days by Sea.

Q7: Do you have any reshipment policy  ?

A: We have good after-sale service and re-shipment policy if the parcel  lose. Our long association with  our clients has brought great benefits. We always take the upmost care in the packaging of our products . Our clients will confirm this as even they struggle to find them without help at times. But in spite of our best efforts it is still possible  will seize a small number of packages. In this circumstance we promise reship free  to establish  long term relationship.