CN110008830A - A kind of WO based on photochromic effect3The preparation method and applications of ceramics - Google Patents
A kind of WO based on photochromic effect3The preparation method and applications of ceramics Download PDFInfo
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- CN110008830A CN110008830A CN201910132188.8A CN201910132188A CN110008830A CN 110008830 A CN110008830 A CN 110008830A CN 201910132188 A CN201910132188 A CN 201910132188A CN 110008830 A CN110008830 A CN 110008830A
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- ceramics
- fingerprint
- identification
- preparation
- photochromic effect
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- 239000000919 ceramic Substances 0.000 title claims abstract description 69
- 238000002360 preparation method Methods 0.000 title claims abstract description 20
- 238000004321 preservation Methods 0.000 claims abstract description 16
- 238000010792 warming Methods 0.000 claims abstract description 16
- 229910009112 xH2O Inorganic materials 0.000 claims abstract description 3
- 230000000694 effects Effects 0.000 claims description 12
- 238000005516 engineering process Methods 0.000 abstract description 9
- 210000004243 sweat Anatomy 0.000 abstract description 9
- 238000003825 pressing Methods 0.000 abstract description 8
- 238000005286 illumination Methods 0.000 abstract description 4
- 229910010293 ceramic material Inorganic materials 0.000 abstract description 2
- 238000001816 cooling Methods 0.000 description 5
- 230000003287 optical effect Effects 0.000 description 5
- 229910052573 porcelain Inorganic materials 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 238000013475 authorization Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000000994 depressogenic effect Effects 0.000 description 1
- 210000002615 epidermis Anatomy 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
- G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
- G06V40/12—Fingerprints or palmprints
- G06V40/13—Sensors therefor
- G06V40/1329—Protecting the fingerprint sensor against damage caused by the finger
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- Engineering & Computer Science (AREA)
- Human Computer Interaction (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Multimedia (AREA)
- Theoretical Computer Science (AREA)
- Non-Silver Salt Photosensitive Materials And Non-Silver Salt Photography (AREA)
Abstract
The present invention relates to a kind of WO based on photochromic effect3The preparation method and applications of ceramics, belong to fingerprint collecting and identification technology field.First by (NH4)6H2W12O40·xH2O is warming up to 100 ~ 350 DEG C of heat preservations 3 hours in air atmosphere and then is cooled to room temperature with furnace temperature, is pressed into the disk that diameter is 18mm；In air atmosphere, it is cooled to room temperature after obtained disk being warming up to 400 ~ 700 DEG C of heat preservations 3 hours, obtains WO3Ceramics.The present invention uses the WO with photochromic effect3Ceramic material realizes the acquisition and identification of fingerprint, when finger is in WO3After ceramic surface pressing leaves invisible fingerprints of sweat, illumination meeting is so that WO3The invisible fingerprints of sweat of ceramic surface is displayed in the form of blue obvious fingerprint, to carry out fingerprint collecting and identification.Compared with previous fingerprint collecting and identification technology, fingerprint collecting and identification based on photochromism have many advantages, such as fingerprint recognition with convenient, stability is good, the holding time is long and accuracy is high.
Description
Technical field
The present invention relates to a kind of WO based on photochromic effect3The preparation method and applications of ceramics, belong to fingerprint and adopt
Collection and identification technology field.
Background technique
The epidermis of mankind's trick has some protrusions.When finger contacts body surface, the sweat of finger and oily matter meeting
Form finger lines, it is considered to be potential fingerprint.Due to the uniqueness of fingerprint and lifelong invariance become it is most widely used
One of general biological identification technology.Fingerprint collecting and identification are included in laws and regulations by many countries, government, if the U.S. is in " 911 "
It is mentioned in three related bills (" patriot's bill ", " at-the-border-visa bill ", " aviation safety bill ") passed through after event
And by the acquisition of fingerprint and identify the basic guarantee as enforcement.And in public and civil field, fingerprint collecting and identification
Extensive concern is obtained because it has application in the identity authorization systems such as Fingerprint Lock, fingerprint attendance, e-bank.Optical technology
Acquisition and identification fingerprint are that history is most remote, most popular technology.Its principle is placed a finger on optical mirror slip, finger
In the built-in light irradiation, it is incident upon on charge-coupled device (CCD) with prism, and then forms crestal line (in fingerprint image
Streakline with one fixed width and trend) in black, valley line (depressed section between streakline) it is white it is digitized, can quilt
The multi-grayscale fingerprint image of fingerprint equipment algorithm process.The advantages of optical fingerprint collecting and identification technology is high resolution, valence
Lattice are cheap.But there is also obvious disadvantages, due to requiring sufficiently long light path, therefore it is required that sufficiently large size, and excessively
Dry and excessively greasy finger also will make the effect of optical finger print product degenerate, therefore deficient in stability and accuracy.Therefore
Inventing a kind of fingerprint collecting and identification material has important application value.
Summary of the invention
The purpose of the present invention is the deficiency of fingerprint stability and accuracy is acquired and identified for existing optical technology, provide
A kind of WO based on photochromic effect3The preparation method and applications of ceramics.Using the WO with photochromic effect3Ceramics
Material realizes the acquisition and identification of fingerprint, when finger is in WO3After ceramic surface pressing leaves invisible fingerprints of sweat, illumination meeting is so that WO3Pottery
The invisible fingerprints of sweat on porcelain surface is displayed in the form of blue obvious fingerprint, to carry out fingerprint collecting and identification.With it is previous
Fingerprint collecting is compared with identification technology, the fingerprint collecting based on photochromism and identification have fingerprint recognition have facilitate,
The advantages that stability is good, the holding time is long and accuracy is high.The invention is realized by the following technical scheme.
A kind of WO based on photochromic effect3The preparation method of ceramics, the specific steps of which are as follows:
(1) first by (NH4)6H2W12O40·xH2O is warming up to 100 ~ 350 DEG C of heat preservations 3 hours then with furnace temperature in air atmosphere
It is cooled to room temperature, is pressed into the disk that diameter is 18mm；
(2) in air atmosphere, it is cooled to room temperature after the disk that step (1) obtains being warming up to 400 ~ 700 DEG C of heat preservations 3 hours,
Obtain WO3Ceramics.
A kind of WO based on photochromic effect3The WO that the preparation method of ceramics is prepared3The application of ceramics, utilizes WO3
The photochromic effect of ceramics realizes fingerprint collecting and identification.
When finger is in WO3After ceramic surface pressing leaves invisible fingerprints of sweat, illumination meeting is so that WO3The invisible fingerprints of sweat of ceramic surface
It is displayed in the form of blue obvious fingerprint.
The beneficial effects of the present invention are:
(1) when finger is in WO3After ceramic surface pressing leaves invisible fingerprints of sweat, illumination meeting is so that WO3The invisible fingerprints of sweat of ceramic surface
It is displayed in the form of blue obvious fingerprint.
(2) WO synthesized by the present invention3Ceramic material has excellent photochromic property, have convenient, stability is good,
The advantages that holding time is long and accuracy is high.
(3) preparation process of the present invention is simple, at low cost, is expected to realize industrialization production.
Detailed description of the invention
Fig. 1 is the resulting WO of the embodiment of the present invention 1,2 and 33Ceramic picture.
Fig. 2 is the resulting WO of the embodiment of the present invention 1,2 and 33Ceramic surface is presented after fingerprint pressing and light irradiation
Fingerprint recognition image.
Fig. 3 is the resulting WO of the embodiment of the present invention 1,2 and 33Ceramics press resulting obvious fingerprint in air by fingerprint
It is middle to place 7 months resulting pictures later.
Wherein (a) is the WO that embodiment 1 is prepared3Ceramics, (b) WO being prepared for embodiment 23Ceramics (c) are
The WO that embodiment 3 is prepared3Ceramics.
Specific embodiment
With reference to the accompanying drawings and detailed description, the invention will be further described.
Embodiment 1
The WO based on photochromic effect3The preparation method of ceramics, the specific steps of which are as follows:
(1) first by (NH4)6H2W12O40·xH2Then O is warming up to 300 DEG C of heat preservations 3 hours with furnace temperature cooling in air atmosphere
To room temperature, it is pressed into the disk that diameter is 18mm；
(2) in air atmosphere, it is cooled to room temperature, obtains after the disk that step (1) obtains being warming up to 400 DEG C of heat preservations 3 hours
WO3Ceramics.
The WO that the present embodiment is prepared3Ceramic picture as shown in Fig. 1 (a), as can be seen from Figure 1 WO3The color of ceramics
It is orange.
The WO that the present embodiment is prepared3Ceramic picture is after fingerprint pressing and light irradiation, the fingerprint recognition of presentation
Image is as shown in Figure 2 (a), as can be seen from Figure 2 due to WO3Photochromic effect show apparent fingerprint.WO3Ceramics
Resulting picture is pressed after resulting obvious fingerprint is placed 7 months in air as shown in Fig. 3 (a) by fingerprint.Therefore should
WO based on photochromic effect3The WO that the preparation method of ceramics is prepared3The application of ceramics, utilizes WO3The light-induced variable of ceramics
Chromatic effect realizes fingerprint collecting and identification.
Embodiment 2
The WO based on photochromic effect3The preparation method of ceramics, the specific steps of which are as follows:
(1) first by (NH4)6H2W12O40·xH2Then O is warming up to 300 DEG C of heat preservations 3 hours with furnace temperature cooling in air atmosphere
To room temperature, it is pressed into the disk that diameter is 18mm；
(2) in air atmosphere, it is cooled to room temperature, obtains after the disk that step (1) obtains being warming up to 500 DEG C of heat preservations 3 hours
WO3Ceramics.
The WO that the present embodiment is prepared3Ceramic picture as shown in Fig. 1 (b), as can be seen from Figure 1 WO3The color of ceramics
For glassy yellow.
The WO that the present embodiment is prepared3Ceramic picture is after fingerprint pressing and light irradiation, the fingerprint recognition of presentation
Image as shown in Fig. 2 (b), as can be seen from Figure 2 due to WO3Photochromic effect show apparent fingerprint.WO3Ceramics
It is as shown in Figure 3 (b) that resulting picture after resulting obvious fingerprint is placed 7 months in air is pressed by fingerprint.Therefore should
WO based on photochromic effect3The WO that the preparation method of ceramics is prepared3The application of ceramics, utilizes WO3The light-induced variable of ceramics
Chromatic effect realizes fingerprint collecting and identification.
Embodiment 3
The WO based on photochromic effect3The preparation method of ceramics, the specific steps of which are as follows:
(1) first by (NH4)6H2W12O40·xH2Then O is warming up to 300 DEG C of heat preservations 3 hours with furnace temperature cooling in air atmosphere
To room temperature, it is pressed into the disk that diameter is 18mm；
(2) in air atmosphere, it is cooled to room temperature, obtains after the disk that step (1) obtains being warming up to 700 DEG C of heat preservations 3 hours
WO3Ceramics.
The WO that the present embodiment is prepared3Ceramic picture such as Fig. 1 (c) is shown, as can be seen from Figure 1 WO3The color of ceramics
For glassy yellow.
The WO that the present embodiment is prepared3Ceramic picture is after fingerprint pressing and light irradiation, the fingerprint recognition of presentation
Image is as shown in Figure 2 (c), as can be seen from Figure 2 due to WO3Photochromic effect show apparent fingerprint.WO3Ceramics
It is as shown in Figure 3 (c) that resulting picture after resulting obvious fingerprint is placed 7 months in air is pressed by fingerprint.Therefore should
WO based on photochromic effect3The WO that the preparation method of ceramics is prepared3The application of ceramics, utilizes WO3The light-induced variable of ceramics
Chromatic effect realizes fingerprint collecting and identification.
As can be seen from Figure 1 sintering temperature is 400 DEG C of WO prepared3Ceramic color is orange, 500 and 700 DEG C of systems
Standby WO out3Ceramic color is glassy yellow.
The resulting WO of 1-3 of the embodiment of the present invention3Ceramics, the pottery obtained when wherein sintering temperature is 400,500 DEG C and 700 DEG C
Porcelain is the ceramics with photochromic effect, and by the fingerprint shown according to photochromism with convenient, stable
The advantage that property is good, the holding time is long and accuracy is high.Illustrate the WO for having the characteristics that photochromic3Identification and acquisition neck in fingerprint
Domain is with a wide range of applications.
Embodiment 4
The WO based on photochromic effect3The preparation method of ceramics, the specific steps of which are as follows:
(1) first by (NH4)6H2W12O40·xH2Then O is warming up to 100 DEG C of heat preservations 3 hours with furnace temperature cooling in air atmosphere
To room temperature, it is pressed into the disk that diameter is 18mm；
(2) in air atmosphere, it is cooled to room temperature, obtains after the disk that step (1) obtains being warming up to 700 DEG C of heat preservations 3 hours
WO3Ceramics.
The WO based on photochromic effect3The WO that the preparation method of ceramics is prepared3The application of ceramics, utilizes WO3Pottery
The photochromic effect of porcelain realizes fingerprint collecting and identification.
Embodiment 5
The WO based on photochromic effect3The preparation method of ceramics, the specific steps of which are as follows:
(1) first by (NH4)6H2W12O40·xH2Then O is warming up to 350 DEG C of heat preservations 3 hours with furnace temperature cooling in air atmosphere
To room temperature, it is pressed into the disk that diameter is 18mm；
(2) in air atmosphere, it is cooled to room temperature, obtains after the disk that step (1) obtains being warming up to 700 DEG C of heat preservations 3 hours
WO3Ceramics.
The WO based on photochromic effect3The WO that the preparation method of ceramics is prepared3The application of ceramics, utilizes WO3Pottery
The photochromic effect of porcelain realizes fingerprint collecting and identification.
In conjunction with attached drawing, the embodiment of the present invention is explained in detail above, but the present invention is not limited to above-mentioned
Embodiment within the knowledge of a person skilled in the art can also be before not departing from present inventive concept
Put that various changes can be made.
Claims (2)
1. a kind of WO based on photochromic effect3The preparation method of ceramics, it is characterised in that specific step is as follows:
(1) first by (NH4)6H2W12O40·xH2O is warming up to 100 ~ 350 DEG C of heat preservations 3 hours then with furnace temperature in air atmosphere
It is cooled to room temperature, is pressed into disk；
(2) in air atmosphere, it is cooled to room temperature after the disk that step (1) obtains being warming up to 400 ~ 700 DEG C of heat preservations 3 hours,
Obtain WO3Ceramics.
2. a kind of WO according to claim 1 based on photochromic effect3The WO that the preparation method of ceramics is prepared3
The application of ceramics, utilizes WO3The photochromic effect of ceramics realizes fingerprint collecting and identification.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910132188.8A CN110008830A (en) | 2019-02-22 | 2019-02-22 | A kind of WO based on photochromic effect3The preparation method and applications of ceramics |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910132188.8A CN110008830A (en) | 2019-02-22 | 2019-02-22 | A kind of WO based on photochromic effect3The preparation method and applications of ceramics |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110008830A true CN110008830A (en) | 2019-07-12 |
Family
ID=67165929
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910132188.8A Pending CN110008830A (en) | 2019-02-22 | 2019-02-22 | A kind of WO based on photochromic effect3The preparation method and applications of ceramics |
Country Status (1)
| Country | Link |
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| CN (1) | CN110008830A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112979161A (en) * | 2021-03-10 | 2021-06-18 | 昆明理工大学 | Preparation method and application of tungsten phosphate glass based on photochromic effect |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090093361A1 (en) * | 2007-10-09 | 2009-04-09 | Sumitomo Chemical Company, Limited | Photocatalyst dispersion liquid and process for producing the same |
| CN104608808A (en) * | 2015-01-29 | 2015-05-13 | 赣州市海龙钨钼有限公司 | Ammonium paratungstate dumper |
| CN105488483A (en) * | 2015-12-07 | 2016-04-13 | 友达光电股份有限公司 | Optical sensor capable of improving quality of fingerprint scan image |
| US20160129432A1 (en) * | 2013-07-05 | 2016-05-12 | Nitto Denko Corporation | Filter Element for Decomposing Contaminants, System for Decomposing Contaminants and Method Using the System |
| CN107657238A (en) * | 2017-09-29 | 2018-02-02 | 联想(北京)有限公司 | A kind of fingerprint collecting method and electronic equipment |
-
2019
- 2019-02-22 CN CN201910132188.8A patent/CN110008830A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090093361A1 (en) * | 2007-10-09 | 2009-04-09 | Sumitomo Chemical Company, Limited | Photocatalyst dispersion liquid and process for producing the same |
| US20160129432A1 (en) * | 2013-07-05 | 2016-05-12 | Nitto Denko Corporation | Filter Element for Decomposing Contaminants, System for Decomposing Contaminants and Method Using the System |
| CN104608808A (en) * | 2015-01-29 | 2015-05-13 | 赣州市海龙钨钼有限公司 | Ammonium paratungstate dumper |
| CN105488483A (en) * | 2015-12-07 | 2016-04-13 | 友达光电股份有限公司 | Optical sensor capable of improving quality of fingerprint scan image |
| CN107657238A (en) * | 2017-09-29 | 2018-02-02 | 联想(北京)有限公司 | A kind of fingerprint collecting method and electronic equipment |
Non-Patent Citations (2)
| Title |
|---|
| JIUFENG RUAN等: "Laser induced thermochromism and reversible upconversion emission modulation of a novel WO3:Yb3+,Er3+ ceramic: dual-modal fingerprint acquisition application", 《CHEMICAL ENGINEERING JOURNAL》 * |
| 丁佩: "基于材料变色性能的指纹采集方法研究", 《中国优秀硕士学位论文全文数据库 （工程科技Ⅰ辑）》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112979161A (en) * | 2021-03-10 | 2021-06-18 | 昆明理工大学 | Preparation method and application of tungsten phosphate glass based on photochromic effect |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190712 |
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| RJ01 | Rejection of invention patent application after publication |