CN102744935B

CN102744935B - Energy-saving coated glass

Info

Publication number: CN102744935B
Application number: CN201210258579.2A
Authority: CN
Inventors: 赵高凌; 赵嫦; 张馨文; 韩高荣
Original assignee: Zhejiang University ZJU
Current assignee: Zhejiang University ZJU
Priority date: 2012-07-25
Filing date: 2012-07-25
Publication date: 2015-07-15
Anticipated expiration: 2032-07-25
Also published as: CN102744935A

Abstract

The invention discloses energy-saving coated glass. A silicon coating, a monox meso pore coating and a fluorine doping stannic oxide coating are sequentially coated on a glass substrate from top to botton. As a sunlight control coating, the silicon coating can reflect near-infrared radiation under intense sun to largely improve a shading coefficient and reduce heat entering the interior of a room from exterior of the room; the monox meso pore coating utilizes a porous structure of the meso pore coating as a transparent heat insulation film so that heat conduction can be blocked, and heat transfer between the interior and the exterior of the room can be reduced; and the fluorine doping stannic oxide coating is used as a low radiation film to reduce the medium-far infrared radiation from the interior of the room and reduce the loss of heat in winter. The energy conservation coated glass provided by the invention is not only suitable for both south, but also suitable for north with large temperature differences in winter and summer, so that the application scope of coated glass for building is expanded.

Description

Energy-conservation coated glass

Technical field

The present invention is a kind of energy-conservation coated glass for building.

Background technology

Building energy conservation is one of important topic needing solution badly in current economic development.In the building energy consumption of China, the energy consumption caused by glass door and window accounts for 56% of whole building radiating amount, especially up to more than 90% in curtain buildings.At present, the building coated glasses such as sunlight control, Low emissivity and phase transformation are energy-conservation realize thermal radiation resistance by means of only the transmitance controlling each wave band light thus reach energy-conservation object, and directly heat transfer is another important channel of the outer heat exchange of Indoor environment.So, need the efficient energy-saved coated glass having thermal radiation resistance and obstruct heat-conductive characteristic concurrently that research is applicable to China's climatic environment badly.

Summary of the invention

The object of this invention is to provide a kind of energy-conservation coated glass being applicable to the large climatic environment of summer in the winter temperature difference.

Energy-conservation coated glass of the present invention, is coated with silicon film, silicon oxide mesoporous rete and fluorine doped tin oxide rete from bottom to top on the glass substrate successively.

The preparation method of energy-conservation coated glass: first adopt chemical vapour deposition technique depositing silicon rete on the glass substrate, thicknesses of layers is determined by sedimentation time, be generally 60 ~ 80nm, then adopt sol-gel process on silicon film, apply silicon oxide mesoporous rete, thicknesses of layers is determined by the number of times of repetitive coatings, rete is thick general at 10 ~ 40 microns, then adopts hot spray process to spray fluorine doped tin oxide rete on silicon oxide mesoporous rete, and thicknesses of layers is 300 ~ 400nm.

Energy-conservation coated glass of the present invention is owing to there being sandwich construction, and its silicon film, can reflect near IR wavelength as solar control film, and shading coefficient is improved greatly; Silicon oxide mesoporous rete utilizes the loose structure of mesoporous film as transparent heat-insulating film, can intercept heat transfer; Fluorine doped tin oxide rete, as low-radiation film, can reflect mid and far infrared radiation, reduces heat loss within doors.

Beneficial effect of the present invention: multi-layer energy-saving film glass not only reduces the heat loss and transmission that heat radiation causes, its silicon oxide mesoporous film decreases the direct transmission of heat simultaneously, be not only applicable to south, also be applicable to the north that summer in the winter temperature difference is larger, increase the range of application of coated glass for building.

Accompanying drawing explanation

Fig. 1 is that energy-conservation coated glass forms schematic diagram.

Fig. 2 is coated glass energy-saving principle figure.

Detailed description of the invention

The present invention is further illustrated below in conjunction with accompanying drawing and example.

With reference to Fig. 1, energy-conservation coated glass of the present invention, glass substrate 1 is coated with silicon film 2, silicon oxide mesoporous rete 3 and fluorine doped tin oxide rete 4 from bottom to top successively.

Embodiment 1

1) chemical vapour deposition technique is utilized to simulate on-line coating film of float glass technique plating silicon fiml:

Unstripped gas is N ₂silane (the 10%SiH of dilution ₄) and ethene (C ₂h ₄), substrate is the thick white glass of common 5mm, and substrate is fixed on the flat-temperature zone of quartz ampoule, and reacting gas sprays from the shower nozzle of at the uniform velocity movement after mixing chamber mixes, and shower nozzle walking speed is the substrate walking speed of actual production line, laboratory C ₂h ₄/ SiH ₄ratio is 0.5, and depositing temperature is 650 DEG C, depositing silicon thickness 70nm.

2) adopt sol-gel process, prepare mesoporous silicon dioxde film:

Experimental raw is ethyl orthosilicate, absolute ethyl alcohol, hydrochloric acid (mass concentration 36%), and deionized water and softex kw, the total mol ratio of each component of presoma is TEOS: EtOH: HCl: H ₂o: CTAB=l: 25: 0.005: 8: 0.1;

First, by stand-by with 70 DEG C of oven dry after liquid detergent, ethanol and washed with de-ionized water successively for the glass substrate being coated with Si film in advance;

Secondly, by ethyl orthosilicate TEOS, absolute ethyl alcohol, water and hydrochloric acid is in molar ratio: 1: 15: 8: 0.005 mixing, partial hydrolysis in acid condition, stirs 1h and forms solution A, is then add in solution A at 0.1: 10 by the ethanolic solution of CTAB by CTAB/TEOS mol ratio, solution age, after one day, forms SiO ₂colloidal sol, by the SiO prepared ₂colloidal sol is poured in sprayer, is pressurized to 1.5 atm, and glass substrate walking speed is 2 m/min, spraying SiO ₂colloidal sol, SiO ₂mesoporous thickness 10 microns;

Finally, by coated glass substrate at room temperature dry 24h, at 60 DEG C of bone dries, then at 500 DEG C, calcine 2h obtain SiO ₂mesoporous film.

3) hot spray process is adopted to prepare fluorine doped tin oxide film:

Raw materials used is butter of tin, ammonium fluoride and water, SnCl ₄: NH ₄f: H ₂o=1: 0.2: 5, substrate keeps temperature to be 450 DEG C, and spray coating liquor is sprayed by atomizing gun by air compression system, gun slot and substrate distance are 10cm, and gun traffic is 1.5L/min, and spraying number of times is 10 times, each spray 2s, every minor tick 5min, fluorine doped tin oxide film thickness is 400nm.

This routine gained coated glass light transmittance is 20% ~ 30%.

Coated glass energy-saving principle figure is see Fig. 2.

This coated glass of the present invention can stop that the direct conduction of heat again can thermal radiation resistance.In the climatic environment of cold, stop that indoor heat is energy-conservation key to the lost of outdoor.SiO ₂mesoporous film intercepts heat transfer, stops that indoor heat is to outdoor transmission; Meanwhile, the fluorine doped tin oxide low-radiation film by indoor reflects the mid and far infrared radiation from indoor human body object, reduces indoor heat scattering and disappearing to outdoor as far as possible.In the climatic environment of sweltering heat, stopping that outdoor heat enters indoor is energy-conservation keys.SiO ₂mesoporous film intercepts heat transfer, stops the transmission of outdoor heat to indoor.Simultaneously, when outdoor hot object radiation is transmitted to glass pane, be greater than the mid and far infrared light of 4.5 μm because Si-O key chattering glass can absorb nearly all wavelength and heat up, at this moment, mesoporous thermal isolation film also can stop that glass heat is transmitted to indoor conduction, make this part heat by cross-ventilation, distribute to outdoor.In addition, when strong sunlight irradiates glass, near-infrared partial heat is wherein reflected back outdoor by solar control film (silicon fiml).The heat of such outdoor will weaken greatly on the impact of indoor.

Claims

1. an energy-conservation coated glass, the silicon oxide mesoporous rete (3) it is characterized in that there is silicon film (2) from bottom to top successively on glass substrate (1), adopting sol-gel process to prepare and fluorine doped tin oxide rete (4), wherein, the thickness of silicon film (2) is 60 ~ 80nm, the thickness of silicon oxide mesoporous rete (3) is 10 ~ 40 μm, and the thickness of fluorine doped tin oxide rete (4) is 300 ~ 400nm.