Smart glass has been ubiquitous in our daily life. It can keep the inside cold in summer and warm in winter. Moreover, its heat insulating ability, ultra-violet and x-ray absorption function give people a more healthy living and working environment. It is now widely applied in car windows and building windows. Researchers are now developing the new kind of membrane for agricultural which uses tungsten oxide. Compared to the traditional plastic membrane, it is more functional, has longer service life and does no harm for soil and plants.

Tungsten oxide can be used as raw material for heat insulating masterbatch and heat insulating dispersion liquid for the coating layer of membrane and glass due to its excellent photochromic property, ultra violet light and x-ray absorption property. Chinatungsten Online has been specialized in producing tungsten oxide products for over 20 years. With its outstanding research and developing capability, we now have worked out nano tungsten oxide, nano cesium tungstate for customer's application and also can provide solution for their project. We have the ability to improve and catering for customer's and market's latest needs and trend, that is to adjust manufacturing process and method to improve product quality and property so as to promote the property of smart glass.

Ammonium metatungstate is shorted for AMT. The content of WO3 of AMT is over 90.00% or 91.00%. It appears white crystalline powder, looks like ammonium paratungstate, but insoluble in water. Ammonium metatungstate is widely used in petroleum industry, ceramic industry, fireproof fabric and could be used as material for metal tungsten, tungsten alloy. It is now widely used in the raw material of heat insulating masterbatch.

Chemical formula of tungstic acid is H2WO4. Tungstic acid is yellow powder, soluble in water, insoluble in ethanol, slightly soluble in ammonia. Heat to 100 ° C loss of water from the crystallization of anhydrous. Reacts with strong acid (except hydrofluoric acid) to form water-insoluble yellow tungstic acid, reacts with phosphoric acid or phosphate to form phosphotungstic acid heteropolyacid complex, reacts with organic acids such as tartaric acid, citric acid and oxalic acid to form the corresponding organic acid compound. Tungstic acid is usually used in industry of catalyst, heat insulating masterbatch and dispersion liquid.

Yellow tungsten oxide is yellow crystalline powder. It is produced by roasting ammonium paratungstate at closely controlled temperatures to drive off water and ammonia. Exact time and temperature control determine, to a large extent, the physical characteristics of yellow tungsten oxide. Yellow tungsten oxide has two colors for different grain size. When the grain size of yellow tungsten oxide is around 1.5um, it shows the color of yellow, and when the grain size of yellow tungsten oxide is around 15um, it shows green. The property is similar.

Chemical formula of violet tungsten oxide is W18O49 or WO2.72. Due to the special needle-like or columnar crystal structure of the violet tungsten oxide, and the richer cracks than the other tungsten oxide particles, this structure has a large gap which makes its low bulk density, and thus to conducive to the reduction or other reactions. The applications of violet tungsten oxide are as follows:
1. Prepare tungsten powder, especially the production of nano, submicron or super-fine tungsten powder;
2. To apply in the gas sensor, to show a good gas sensitive to nitrogen dioxide (NO2) under room temperature;
3. The preparation of tungsten carbide, super-fine WC-Co powder.
4. Heat insulating dispersion liquid.
5. Catalyst carrier for fuel cell.

Chemical formula of blue tungsten oxide is WO2.9. The appearance is blue powder. It is transition metal oxide semiconductor material, it has special physical and chemical property such as electrochromic, gasochromic and photochromic, widely applied in smart window, photosensitive sensor and gas sensor.

Cesium tungsten bronze is inorganic nano material with good property in absorbing near-infrared with uniform grain size and dispersibility, it has strong absorbing function in near-infrared area with wave length 800~1200nm, also has high transmittance in visible light area with wave length 380~780nm. Its application includes:
1.Use as dispersion for transparent heat insulating coating and membrane.
2.Thermal chemical fiber, textile fiber and other high performance insulating media.
3.Transparent insulating window film, architecture coating.
4.Car pad pasting, PVB insulating membrane, laser marking, diagnosis treatment, infrared filter.

Nano heat insulating masterbatch can be used to produce heat insulating membrane or sheet by three layer compressing or dual direction stretch. Visible light transmittance rate is 5~75%, near-infrared insulation rate is 90~100%, ultraviolet insulation rate is 100%. It can be used to prepare PE, PP, PET, PC, PMMA membrane and sheet. Use cesium tungsten bronze as near infrared insulation raw material, has better transparent property and IR resistance rate compared to traditional ATO and ITO. Cesium tungsten bronze as heat insulating intermediate agent is applied by many membrane manufacturers. It has good thermal stability and dispersion property, the haze is less than 0.5% and won't block the signal of communicating tools.

Nano heat insulating dispersion can combine with acrylic PSA. It has excellent transparency, can isolate the infrared light from the sun. It can be used in insulation films with high transparency and high infrared isolation on the front windshields of automobiles.
Appearance: blue liquid.
Composition: nano ceramic, dispersion, toluene.
Solid content: 23+/-2%.
Effective component: 15+/-2%.
Nano-particle diameter: D50< 35NM.

Nano heat insulating suspension use tungsten oxide as raw material, it has following advantages: High Transmittance, High heat shielding (Tvis:70%, Rir:90%).
By wet coating, easy to make.
Cost is cheaper than other similar products.
Using Metal Oxide, no fading.
No interference in RF Communication.

1.Heat insulating membrane specification: Customized. Can be used in car window and building window.
2.Applying material: nano tungsten oxide.
3.Product advantage: high thermal insulating property, anti UV.
(1)Use nano inorganic insulating material won't cause color fading or block wireless communication.
(2)2 layers of PET membrane (23um) stick together. The other type is 100um. It is dependable and have good ability of anti-cracking.
(3)Anti UV rate can reach 99%. It can prevent color fade of furniture and skin burning.
(4)Service life can reach 10 years.

Growth of crop not only needs proper temperature, but also proper ultra violet light which is indispensible for inhibiting germs and protecting from plant diseases and insect pests. Blocking ultra violet is not good for growth of crop. Agricultural membrane made by ITO or ATO will have inhibition for ultra violet light, its transmittance is below 20%.

Tungsten oxide heat insulating agricultural membrane has high visible light transmittance, high infrared ray insulation rate and proper ultra violet transmittance rate. The membrane includes transparent basic membrane and resin layer, the resin layer includes nano heat insulating material and has insulating rate of over 80% for 780~2400nm near infrared ray, 58% for 380nm ultra violet light and over 93% transmittance for visible light. Moreover, it has longer service life for 10 years and is environmental friendly.

Heat insulating acrylic has component of nano heat insulating slurry, it can absorb near infrared ray with length 800~2000nm. It will lower the inside temperature in summer and keep it warm in winter thus save air conditioning power, in order to save cost and reduce carbon foot print. It has property of high visible light transmittance rate, anti corrosion, has good tolerance and can easy to be machined. The weight is only half of the glass and has better anti cracking and anti crashing property. It can be widely used in building material, light, commodity display, traffic industry, etc..

Heat insulating plyglass is a layer of nano heat insulating laminated membrane in the middle of two pieces of glasses. It has better heat insulating function compared to multiple layered glass. It helps to lower inside temperature, reduce air conditioning and light power so as to reduce carbon foot print and save cost.

Heat insulating laminated membrane use nano tungsten oxide particle as raw material, produced by nano grinding technology, to make the product has better visible light transmittance, heat insulating property. Besides that it lies in the middle of glass can absorb force from outside. So it has property of anti crashing, anti cracking and sound insulation. It is widely used as glass wall, dome sky light, etc..

Advantages of heat insulating glass coating:
1.High transparency, easy to coating.
2.UV blocking rate can reach 99%.
3.1L coating material can coat area for 40~50m2.
4.Anti far infrared ray, has good heat insulating function in summer.
5.Low cost compared to stick thin film. Besides, there is no connecting line.
6.It can coat on the existing glass, no need to change it.
7.Service life is longer than 10 years which twice than thin film.