Embodiment
In order to make the object of the invention, technical scheme and advantage clearer,, the present invention is further elaborated below in conjunction with accompanying drawing and embodiment.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
See also Fig. 1, the photochromic glass 10 of the embodiment of the invention one is shown, it comprises glass basis 12, and glass basis 12 surfaces have one deck photochromic film 14, and photochromic film 14 comprises the component of following weight part:
Tungsten oxide 99.999 70-100 part,
Titanium oxide 5-30 part,
Zinc oxide 3-10 part.
In an embodiment of the present invention, this photochromic film 14 is filmed for what sol-gel method was processed, also comprises the oxalic acid of 10-40 weight part in filming, and the parts by weight of titanium oxide are preferably 5-15.The material of filming in a preferred embodiment, is formed and parts by weight are:
80 parts of Tungsten oxide 99.999s,
20 parts of oxalic acid,
10 parts of titanium oxide,
5 parts in zinc oxide.
Particularly, the thickness 10nm~500nm of photochromic film 14, preferably, the thickness of photochromic film 14 is 200nm.Glass basis 12 can be the glass material of using always.
The detailed process of Prepared by Sol Gel Method photochromic glass is following:
Take by weighing commercial Tungsten oxide 99.999, titanium oxide, Zinc oxide particles and oxalic acid crystal, parts by weight are WO
3: H
2C
2O
4: TiO
2: ZnO=(70~100): (10~40): (5~15): (3~10), be dispersed in and form coating fluid in the deionized water, with spraying equipment with this coating fluid uniform deposition at clean glass substrate (matrix), 50~80 ℃ down the oven dry back form WO
3-H
2C
2O
4-TiO
2-ZnO optically variable films.
Please consult Fig. 1 again; The structure composition of embodiments of the invention two photochromic glasses 10 and thickness etc. are basic identical with embodiment one; The main difference part is the plated film that photochromic film 14 is processed for magnetron sputtering method, and the material of said plated film is formed and parts by weight are:
Tungsten oxide 99.999 70-100 part,
Titanium oxide 5-30 part,
Zinc oxide 3-10 part.
Preferably, the material of said plated film composition and parts by weight thereof are:
80 parts of Tungsten oxide 99.999s,
20 parts of titanium oxide,
5 parts in zinc oxide.
The detailed process that magnetron sputtering method prepares photochromic glass is following:
The mixed powder of titanium oxide, zinc oxide and Tungsten oxide 99.999 is customized to ceramic target, and ratio of weight and number is WO
3: TiO
2: ZnO=(70~100): (5~30): (3~10) prepare the process using technology commonly used of this ceramic target.Then, at mixed atmosphere deposit one deck WO of argon gas and oxygen
3-TiO
2-ZnO photochromic film is on glass substrate (matrix).
In concrete the application, photochromic glass 10 can be used as all kinds glass, for example can be various building glasses, also can be automobile skylight glass, side window glass etc.Photochromic glass 10 receives illumination effect and produce corresponding look to become, and is as shown in Figure 1, when energy greater than WO
3, TiO
2Shine 10 last times of photochromic glass with the light 16 of ZnO energy gap, promptly be radiated on the photochromic film 14, electron-hole pair produces immediately, and light induced electron gets into WO
3Conduction band, with the W that closes on
6+In conjunction with generating blue W
5+, be metachromasia; When no rayed, the pentavalent W that the oxygen molecule oxidation is blue
5+Become sexivalent W
6+, be color fading reaction.Doped Ti O
2Can quicken WO with ZnO
3Variable color and the speed of fading, and TiO
2As the binary oxide system collaborative enhancement is arranged also with ZnO; Doping oxalic acid can consume photohole, makes more light induced electron participate in W
6+Generate W
5+Photochemical reaction, increase the blue degree of depth and variable color energy-saving effect.
Hence one can see that, and photochromic glass 10 of the present invention adopts photochromic film 14, can regulate the shade of film 14 automatically along with the power of external light 16, for example adopts WO
3-H
2C
2O
4-TiO
2During-ZnO film layer, become light blue, mazarine by colourless, carry out variable color fast, variable color efficient is high and stable, when being used for building glass, can regulate light and heat in the inlet chamber automatically, reduces utilization ratios such as fan, air-conditioning, cuts down the consumption of energy.And, owing to adopt oxide compound, nonflammable; Need not use poisonous, inflammable organic films such as spiral pyrylium compound, azo cpd and condensed ring aromatic compound yet; Make the photochromic glass asepsis environment-protecting, security is higher, can be widely used in various energy-saving glass field.
Below be concrete instance, with concrete structure, material composition, preparation technology and the detection effect that photochromic glass 10 of the present invention is described.
Instance 1 sol-gel method
Take by weighing commercial Tungsten oxide 99.999, titanium oxide, Zinc oxide particles and oxalic acid crystal, ratio of weight and number is WO
3: H
2C
2O
4: TiO
2: ZnO=80:20:10:5, be dispersed in and form coating fluid in the deionized water, with spraying equipment with this coating fluid uniform deposition at clean glass substrate (matrix), 60 ℃ down the oven dry back form WO
3-H
2C
2O
4-TiO
2-ZnO optically variable films, thickness are 100 nanometers.
Detect WO
3-H
2C
2O
4-TiO
2The variable color of-ZnO sample and energy-saving effect: directly sample is placed under the outdoor sunlight, fetches sample after 3 minutes and utilize the printing opacity appearance to detect.The result shows, solar light irradiation after 3 minutes glass colour become mazarine by light color, unglazed photograph takes off again after 60 minutes and is light color, this variable color-fade and can circulate repeatedly.
Specifically as shown in Figure 2, solar light irradiation is after 3 minutes, and the sunshine transmittance reduces by 15%, and shading coefficient descends about 0.14; Unglazed photograph can fade 50% after 60 minutes, can fade this variable color-fade and can circulate repeatedly behind the several hrs fully.
Instance 2 magnetron sputtering methods
The mixed powder of titanium oxide, zinc oxide and Tungsten oxide 99.999 is customized to ceramic target, and ratio of weight and number is WO
3: TiO
2: ZnO=80:20:5.The work for preparing this ceramic target is accomplished by target producer.Under the mixed atmosphere of argon gas and oxygen, deposition one deck WO
3-TiO
2-ZnO optically variable films is on glass substrate (matrix), and thickness is 200 nanometers.
Detect WO
3-TiO
2The variable color of-ZnO sample and energy-saving effect: directly sample is placed under the outdoor sunlight, fetches sample after 20 minutes and utilize the printing opacity appearance to detect.Glass colour becomes mazarine by light color as a result, and the sunshine transmittance reduces by 11%, and shading coefficient descends about 0.10; Unglazed photograph can fade 40% after 60 minutes, can fade this variable color-fade and can circulate repeatedly behind the several hrs fully.
The above is merely preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of within spirit of the present invention and principle, being done, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.