Tungsten Crucible for Waterproof Membrane

With the continuous development of optical applications, the scope of application of optoelectronic products becomes more widely, and product requirements have gradually increased. A waterproofing membrane is a layer of material that prevents the passage of water. These materials are used in a huge range of products, but the term is generally used when referring to construction or clothing. Waterproof is often a matter of degree rather than certainty. In the vacuum coating process, the inorganic material would become the vapor and deposit on the substrate surface which is bombarded by ohmic heating or high energy electron gun. Because the microstructure film is uneven which would cause a large number of capillary voids during deposition, causing the lens surfaces absorb dust, water, oil. Finally, it will easily scratch the surface of the product, on the other hand, the dust would have a great impact on the optical performance of products. Thus, the waterproof film prepared by a wolfram crucible can overcome this deficiency partly.

First of all, put the high purity and amorphous oxides materials as carrier materials, and then form them into the final shape through freezing process or heating process by adhesive in a room temperature. After that, put the semi-finished product into a tungsten crucible which is put into a high temperature furnace and pressure inside the furnace, the heat treatment with the 850-1500 ℃ temperature. In the case of heat treatment, form oxide carrier materials with many hole and evenly shape through the changing of the shape. At the end of it, dropping waterproof material which contains an organic fluorine-silicon in a porous oxide carrier material, eventually forming a waterproof membrane.

As a carrier of semi-finished product, when heating, tungsten crucible would cost much less time to rise the temperature thanks to its high melting point, boiling points, and high thermal conductivity. Operation of wolfram crucible for waterproof membrane is simple and convenient which can also produce a lot of production in a short time. After using silica oxide carrier materials, people do not need to pay special attention to its recycling, manufacturers can generally handle it the same as the general waste, therefore, the cost is relative low. Wolfram crucible for waterproof membrane would make less time-consuming as well as high performance and the in the productions process it would not cause a great impact on the environment.