CN110818411A - MoO based on photochromic effect3Method for producing ceramic and use thereof - Google Patents
MoO based on photochromic effect3Method for producing ceramic and use thereof Download PDFInfo
- Publication number
- CN110818411A CN110818411A CN201910834676.3A CN201910834676A CN110818411A CN 110818411 A CN110818411 A CN 110818411A CN 201910834676 A CN201910834676 A CN 201910834676A CN 110818411 A CN110818411 A CN 110818411A
- Authority
- CN
- China
- Prior art keywords
- moo
- ceramic
- fingerprint
- identification
- fingerprints
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000000919 ceramic Substances 0.000 title claims abstract description 63
- JKQOBWVOAYFWKG-UHFFFAOYSA-N molybdenum trioxide Inorganic materials O=[Mo](=O)=O JKQOBWVOAYFWKG-UHFFFAOYSA-N 0.000 claims abstract description 23
- 238000002360 preparation method Methods 0.000 claims abstract description 15
- 238000003825 pressing Methods 0.000 claims abstract description 15
- 238000001816 cooling Methods 0.000 claims abstract description 12
- 238000010438 heat treatment Methods 0.000 claims abstract description 11
- 230000000694 effects Effects 0.000 claims description 15
- 210000004243 sweat Anatomy 0.000 claims description 6
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 5
- 238000000227 grinding Methods 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 2
- 238000005516 engineering process Methods 0.000 abstract description 11
- 238000003860 storage Methods 0.000 abstract description 4
- 238000005286 illumination Methods 0.000 abstract description 3
- 230000035900 sweating Effects 0.000 abstract 1
- 239000000463 material Substances 0.000 description 6
- 229910010293 ceramic material Inorganic materials 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 235000019441 ethanol Nutrition 0.000 description 1
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000006855 networking Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/495—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on vanadium, niobium, tantalum, molybdenum or tungsten oxides or solid solutions thereof with other oxides, e.g. vanadates, niobates, tantalates, molybdates or tungstates
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
- C04B35/62605—Treating the starting powders individually or as mixtures
- C04B35/6261—Milling
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
- C04B2235/9646—Optical properties
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Structural Engineering (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Human Computer Interaction (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Multimedia (AREA)
- Theoretical Computer Science (AREA)
- Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
Abstract
The invention relates to a MoO based on photochromic effect3A preparation method and application of ceramics belong to the technical field of fingerprint acquisition and identification. Firstly (NH)4)6Mo7O24·4H2O, presintering at 100 ℃ in air atmosphere, keeping the temperature for 1 hour, then cooling to room temperature along with the furnace, pressing the wafer into a wafer with the diameter of 18mm by using a tablet press, then heating the wafer to 500-700 ℃ in air atmosphere, keeping the temperature for 2 hours, then cooling to room temperature along with the furnace to obtain MoO3A ceramic. The invention adopts MoO with color-changing effect3The ceramic realizes the collection and identification of fingerprints when the finger is in the MoO3Ceramic surface pressing deviceAfter sweating, fingerprint latency, illumination will cause MoO3The fingerprints on the ceramic surface are displayed in the form of blue obvious fingerprints, so that fingerprint collection and identification are carried out. Compared with the prior fingerprint acquisition and identification technology, the fingerprint acquisition and identification based on the photochromic phenomenon has the advantages of convenience, good stability, long storage time, high accuracy and the like.
Description
Technical Field
The invention relates to a MoO based on photochromic effect3A preparation method and application of ceramics belong to the technical field of fingerprint acquisition and identification.
Background
Today in the networking era, everyone needs to confirm personal identity and determine authority at any time, and especially in the information society, the requirement for security is higher and higher. Fingerprint identification is one kind of biological characteristic identification, and has the commonality of all biological characteristic identifications, namely uniqueness, lifelong invariance, safety and the like based on human biological characteristics. The fingerprint identification principle is mainly based on the geometric characteristics or physiological characteristics of fingerprints, and the fingerprints are expressed through various sensing technologies to form a fingerprint image which is digitally expressed. Fingerprint identification has become closely related to the life of people, and fingerprint identification technology has completely opened the introduction of the "fingerprint era" on a global scale. The fingerprint identification technology is applied to a lot of life, for example, bank deposit passwords are stolen, decoded or forgotten by people, identification card counterfeiting and other problems appear endlessly, so that the fingerprint identification technology is applied to banks. In 2005 to 2006, banks such as Joyo, Mie and the like in japan issue bank cards capable of storing user fingerprints or palm prints in succession, and improve the customer security experience in cooperation with the fingerprint identification ATM; on the other hand, electronic document materials with private privacy or business secrets and the like are often copied by others in a stealing mode, and great economic loss is caused to victims. The application of fingerprint identification technology in IT products such as computers, memory cards and the like makes the problems to be solved. The uniqueness and stability of the fingerprint ensure that the data of the user can not be read, modified and deleted by others at will, and the steps of using passwords in many places, such as windows login, electronic bank account, file encryption and the like, are omitted. At present, identity identification authentication is carried out according to fingerprints in many foreign regions, even children in kindergarten are authenticated through fingerprints, but in China, the fingerprint identification technology is only applied in a large amount in some professional fields, such as the banking industry and the like, and in the future, bank businesses facing the public, such as fingerprint ATM cash dispensers and the like, are popularized in China. Now, people have already recognized the superiority of the fingerprint identification technology, products such as fingerprint identification entrance guard, fingerprint identification computer, fingerprint identification intelligent bank card and the like appear in the market, but the development and design of civil fingerprint identification products are just started, and many fields need the intervention of the fingerprint identification technology, so that new development power is injected for the products. However, the stability and accuracy of fingerprint collection are insufficient at present, so that the invention of the material with better fingerprint collection and identification accuracy and stability has important application value.
Disclosure of Invention
The invention aims to provide a MoO based on photochromic effect aiming at the defects of stability and accuracy of fingerprint acquisition and identification in the prior optical technology3Preparation method and application of ceramic by using MoO with photochromic effect3The ceramic material realizes the collection and identification of fingerprints when the finger is in the MoO3After pressing and leaving a latent sweat fingerprint on the ceramic surface, the sample is irradiated with light, which results in MoO3The sweat latent fingerprints on the ceramic surface are displayed in the form of blue obvious fingerprints, so that the fingerprints are collected and identified. Compared with the traditional fingerprint acquisition and identification technology, the fingerprint acquisition and identification method based on the photochromic phenomenon has the advantages of convenience, high stability, long storage time, high precision and the like. The invention is realized by the following technical scheme.
MoO based on photochromic effect3The preparation method of the ceramic comprises the following specific steps:
(1) firstly (NH)4)6Mo7O24·4H2Mixing and grinding O and absolute ethyl alcohol, heating to 100 ℃ in air atmosphere, keeping the temperature for 1 hour, cooling to room temperature along with the furnace temperature, and pressing into a wafer with the diameter of 18 mm;
(2) heating the wafer obtained in the step 1 to 500-700 ℃ in an air atmosphere, preserving heat for 2 hours, and cooling to room temperature along with the furnace to obtain MoO3A ceramic.
MoO based on photochromic effect3MoO prepared by preparation method of ceramic3Use of ceramics, using MoO3The photochromic effect of the ceramic realizes the collection and identification of the latent fingerprints of the sweat.
When the finger is in MoO3After pressing the ceramic surface to leave a latent sweat fingerprint, illumination will cause MoO3The fingerprint of the ceramic surface appeared as a blue apparent fingerprint.
The invention has the beneficial effects that:
(1) when the finger is in MoO3After the ceramic surface is pressed to leave sweat latent fingerprints, MoO can be generated after illumination3Sweat latent fingerprints on the ceramic surface appear in the form of blue distinct fingerprints.
(2) MoO synthesized by the invention3The ceramic material has excellent photochromic property, and has the advantages of convenience, good stability, long storage time, high accuracy and the like
(3) The material of the invention has simple preparation process and low cost, and is expected to realize industrialized production.
Drawings
FIG. 1 is a MoO obtained according to examples 1, 2 and 3 of the present invention3Ceramic pictures.
FIG. 2 is a MoO obtained according to examples 1, 2 and 3 of the present invention3And fingerprint identification images are displayed on the ceramic surface after fingerprint pressing and near infrared light irradiation.
FIG. 3 is a picture of the overt fingerprints obtained in examples 1, 2 and 3 of the present invention after being left in air for 10 months.
Wherein (a) is the MoO prepared in example 13Ceramic, (b) MoO prepared in example 23Ceramic, (c) MoO prepared in example 33A ceramic.
Detailed Description
The invention is further described with reference to the following drawings and detailed description.
Example 1
The MoO based on photochromic effect3The preparation method of the ceramic comprises the following specific steps:
(1) first, 1.5g (NH) was weighed4)6Mo7O24·4H2O, adding 5ml of anhydrous ethyl acetateGrinding alcohol to obtain a mixed material, heating to 100 ℃ in an air atmosphere, preserving heat for 1 hour, cooling to room temperature along with the furnace temperature, and pressing into a wafer with the diameter of 18 mm;
(2) heating the wafer obtained in the step (1) to 500 ℃ in an air atmosphere, preserving the heat for 2 hours, and cooling to room temperature to obtain MoO3A ceramic.
MoO prepared in this example3The ceramic picture is shown in FIG. 1 (a), and MoO can be seen from FIG. 13The color of the ceramic is gray.
The MoO prepared in this example was used3After the ceramic picture is subjected to fingerprint pressing and light irradiation, a fingerprint identification image is shown in fig. 2 (a), and it can be seen from fig. 2 that MoO is caused3The photochromic effect of (a) shows a clear fingerprint. MoO3The picture of the obvious fingerprint obtained by pressing the ceramic with the fingerprint is shown in fig. 3 (a) after the ceramic is placed in the air for 10 months. The MoO based on the photochromic effect is therefore3MoO prepared by preparation method of ceramic3Use of ceramics, using MoO3The photochromic effect of the ceramic realizes fingerprint collection and identification.
Example 2
The MoO based on photochromic effect3The preparation method of the ceramic comprises the following specific steps:
(1) first, 1.5g (NH) was weighed4)6Mo7O24·4H2Adding 5ml of absolute ethyl alcohol, grinding to obtain a mixed material, heating to 100 ℃ in an air atmosphere, keeping the temperature for 1 hour, cooling to room temperature along with the furnace temperature, and pressing into a wafer with the diameter of 18 mm;
(2) heating the wafer obtained in the step (1) to 600 ℃ in an air atmosphere, preserving the heat for 2 hours, and cooling the wafer to room temperature along with a furnace to obtain MoO3A ceramic.
MoO prepared in this example3The ceramic picture is shown in FIG. 1 (b), and MoO can be seen from FIG. 13The color of the ceramic is yellow.
The MoO prepared in this example was used3The ceramic picture is pressed and polished by fingerprintsAfter irradiation, the fingerprint recognition image is shown in FIG. 2 (b), which is shown in FIG. 2 due to MoO3The photochromic effect of (a) shows a clear fingerprint. MoO3The picture of the obvious fingerprint obtained by pressing the ceramic with the fingerprint after being placed in the air for 10 months is shown in fig. 3 (b). The MoO based on the photochromic effect is therefore3MoO prepared by preparation method of ceramic3Use of ceramics, using MoO3The photochromic effect of the ceramic realizes fingerprint collection and identification.
Example 3
The MoO based on photochromic effect3The preparation method of the ceramic comprises the following specific steps:
(1) first, 1.5g (NH) was weighed4)6Mo7O24·4H2Adding 5ml of absolute ethyl alcohol, grinding to obtain a mixed material, heating to 100 ℃ in an air atmosphere, keeping the temperature for 1 hour, cooling to room temperature along with the furnace temperature, and pressing into a wafer with the diameter of 18 mm;
(2) heating the wafer obtained in the step (1) to 700 ℃ in an air atmosphere, preserving the heat for 2 hours, and cooling to room temperature to obtain MoO3A ceramic.
MoO prepared in this example3The ceramic picture is shown in FIG. 1 (c), and MoO can be seen from FIG. 13The color of the ceramic is yellow.
The MoO prepared in this example was used3After the ceramic picture is subjected to fingerprint pressing and light irradiation, a fingerprint identification image is shown in fig. 2 (c), and it can be seen from fig. 2 that MoO is caused3The photochromic effect of (a) shows a clear fingerprint. MoO3The picture of the obvious fingerprint obtained by pressing the ceramic with the fingerprint after being placed in the air for 10 months is shown in fig. 3 (c). The MoO based on the photochromic effect is therefore3MoO prepared by preparation method of ceramic3Use of ceramics, using MoO3The photochromic effect of the ceramic realizes fingerprint collection and identification.
From FIG. 1 it can be seen that the MoO is produced at a sintering temperature of 500 deg.C3The ceramic color was gray, 600 and 700 deg.CPrepared MoO3The ceramic color is yellow.
MoO obtained in examples 1 to 3 of the present invention3The ceramic obtained at the sintering temperature of 500 ℃ and at the temperature of 600 ℃ and 700 ℃ is ceramic with photochromic effect, and the fingerprint displayed according to the photochromic phenomenon has the advantages of convenience, good stability, long storage time and high accuracy. MoO illustrating photochromic features3Has wide application prospect in the field of fingerprint identification and collection.
While the present invention has been described in detail with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, and various changes can be made without departing from the spirit and scope of the present invention.
Claims (3)
1. MoO based on photochromic effect3The preparation method of the ceramic is characterized by comprising the following specific steps:
(1) firstly (NH)4)6Mo7O24·4H2Mixing and grinding O and absolute ethyl alcohol, heating to 100 ℃ in air atmosphere, keeping the temperature for 1 hour, cooling to room temperature along with the furnace temperature, and pressing into a wafer;
(2) heating the wafer obtained in the step 1 to 500-700 ℃ in an air atmosphere, preserving heat for 2 hours, and cooling to room temperature along with the furnace to obtain MoO3A ceramic.
2. MoO based on photochromic effect according to claim 13The preparation method of the ceramic is characterized in that the diameter of the round piece in the step (1) is 18 mm.
3. MoO based on photochromic effect according to claim 1 or 23MoO prepared by preparation method of ceramic3Use of ceramics, using MoO3The photochromic effect of the ceramic realizes the collection and identification of the latent fingerprints of the sweat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910834676.3A CN110818411A (en) | 2019-09-05 | 2019-09-05 | MoO based on photochromic effect3Method for producing ceramic and use thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910834676.3A CN110818411A (en) | 2019-09-05 | 2019-09-05 | MoO based on photochromic effect3Method for producing ceramic and use thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110818411A true CN110818411A (en) | 2020-02-21 |
Family
ID=69548097
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910834676.3A Pending CN110818411A (en) | 2019-09-05 | 2019-09-05 | MoO based on photochromic effect3Method for producing ceramic and use thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110818411A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014108841A1 (en) * | 2013-01-09 | 2014-07-17 | Taibah University | Synthesis method of precursors to produce molybdenum oxide moo3 and related materials |
| CN110079315A (en) * | 2019-04-08 | 2019-08-02 | 昆明理工大学 | A kind of thermochromism MoO3: Yb, Er up-conversion phosphor, preparation method and its reversible regulation method of up-conversion luminescence |
-
2019
- 2019-09-05 CN CN201910834676.3A patent/CN110818411A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014108841A1 (en) * | 2013-01-09 | 2014-07-17 | Taibah University | Synthesis method of precursors to produce molybdenum oxide moo3 and related materials |
| CN110079315A (en) * | 2019-04-08 | 2019-08-02 | 昆明理工大学 | A kind of thermochromism MoO3: Yb, Er up-conversion phosphor, preparation method and its reversible regulation method of up-conversion luminescence |
Non-Patent Citations (7)
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7609862B2 (en) | Method for identity verification | |
| US7961917B2 (en) | Method for identity verification | |
| US6539101B1 (en) | Method for identity verification | |
| US6307956B1 (en) | Writing implement for identity verification system | |
| US7809172B2 (en) | Method and system for generating and linking composite images | |
| US20130036463A1 (en) | Biometric-enabled smart card | |
| CN101826151A (en) | Method and system for human face comparison identity identification | |
| CN1016746B (en) | Personal identification system | |
| JP2009543176A (en) | Traceless biometric identification system and method | |
| CN112979161A (en) | Preparation method and application of tungsten phosphate glass based on photochromic effect | |
| CN104103003A (en) | Method for enabling ceramic collection to own digitized information | |
| CN100489882C (en) | Method, device and system for biometric identification | |
| CN110818411A (en) | MoO based on photochromic effect3Method for producing ceramic and use thereof | |
| CN1645406A (en) | Identity discriminating method based on eyebrow identification | |
| CN103793677A (en) | Method for information extraction and identity authentication by identifying raster graphics | |
| AU2023219787A1 (en) | Identity verification and associated platform | |
| US20180253573A1 (en) | Systems and Methods for Utilizing Magnetic Fingerprints Obtained Using Magnetic Stripe Card Readers to Derive Transaction Tokens | |
| Busch | Facing the future of biometrics: Demand for safety and security in the public and private sectors is driving research in this rapidly growing field | |
| Hussain et al. | BSC: A Novel Scheme for Providing Security using Biometric Smart Card | |
| CN110511024B (en) | MoO based on thermochromism effect3Application of ceramics | |
| US20190384925A1 (en) | Document Production and Processing System | |
| JP2004310313A (en) | Card for individual identification including two-dimensional coded personal biological information and personal identification method using the same information | |
| Thakur | Biometric Authentication System: Techniques and Future | |
| Holý et al. | Security concept of individual identification in academic environment of CTU in Prague | |
| TWM464755U (en) | Infrared face recognition system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200221 |