Locate India
Wednesday, 24 February 2016
   

welcome to Chowdhary Minerals & Chemicals



CONTACT US

Contact Person: Mr. Yogesh Chowdhary

Address: 1, Station Road, Liluah, Howrah

Kolkata , , India - 12345

Phone:91-033-26457771

Mobile:

Email: chowdhary_chemicals@rediffmail.com



OUR PRODUCTS

Graphite Products

We offer all types of foundry minerals like graphite powder, coal dust powder, bentonite powder, soap stone powder, fire bricks, etc.


Detergent Powder

We offer all types of foundry minerals like graphite powder, coal dust powder, bentonite powder, soap stone powder, fire bricks, etc.


Paints, Powder & Varnishes

We offer all types of foundry minerals like graphite powder, coal dust powder, bentonite powder, soap stone powder, fire bricks, etc.


Powder Coatings & Other Coatings

We offer all types of foundry minerals like graphite powder, coal dust powder, bentonite powder, soap stone powder, fire bricks, etc.






Metalized sapphire window

Metalized sapphire windows are created by applying thin layers of chrome, nickel and gold around the edge of a sapphire window. This metalized edge creates a surface that can be soldered or bonded directly into your opto-mechanical assembly allowing you to create a hermetic seal. Hermetically sealed optics is used in a variety of applications ranging from infrared imaging systems to medical devices. Technical capability Material: optical sapphire (Al2O3) Diameter tolerance: +0, -0.1mm Thickness tolerance: +/-0.05mm Clear aperture: 90% Surface quality: 80-50 scratches and digs Surface accuracy: 2 lambdas per 25.4mm @ 632.8nm Parallelism: < 3 minutes Coating: AR coating, T > 98% @ 1260-1600nm Metalizing: Chrome, Nickel, and Gold; sputtering method or screen printing method




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