CN107954711A - A kind of forming method of adjustable THz wave optical window and its application - Google Patents

A kind of forming method of adjustable THz wave optical window and its application Download PDF

Info

Publication number
CN107954711A
CN107954711A CN201610898039.9A CN201610898039A CN107954711A CN 107954711 A CN107954711 A CN 107954711A CN 201610898039 A CN201610898039 A CN 201610898039A CN 107954711 A CN107954711 A CN 107954711A
Authority
CN
China
Prior art keywords
optical window
thz wave
forming method
wave optical
adjustable
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.)
Granted
Application number
CN201610898039.9A
Other languages
Chinese (zh)
Other versions
CN107954711B (en
Inventor
李琦
杨炜沂
王荣
朱朋飞
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Institute of Metal Research of CAS
Original Assignee
Institute of Metal Research of CAS
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Institute of Metal Research of CAS filed Critical Institute of Metal Research of CAS
Priority to CN201610898039.9A priority Critical patent/CN107954711B/en
Publication of CN107954711A publication Critical patent/CN107954711A/en
Application granted granted Critical
Publication of CN107954711B publication Critical patent/CN107954711B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • C04B35/46—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 titanium oxides or titanates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B33—ADDITIVE MANUFACTURING TECHNOLOGY
    • B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
    • B33Y10/00—Processes of additive manufacturing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B33—ADDITIVE MANUFACTURING TECHNOLOGY
    • B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
    • B33Y70/00—Materials specially adapted for additive manufacturing
    • 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
    • C04B35/624—Sol-gel processing
    • 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
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3231—Refractory metal oxides, their mixed metal oxides, or oxide-forming salts thereof
    • C04B2235/3232—Titanium oxides or titanates, e.g. rutile or anatase
    • 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
    • C04B2235/60—Aspects relating to the preparation, properties or mechanical treatment of green bodies or pre-forms
    • C04B2235/602—Making the green bodies or pre-forms by moulding
    • C04B2235/6026—Computer aided shaping, e.g. rapid prototyping

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Dispersion Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
  • Inorganic Compounds Of Heavy Metals (AREA)

Abstract

Forming method and its application the invention discloses a kind of adjustable THz wave optical window, belong to 3D printing field and Terahertz applied technical field.This method prepares precursor pulp using sol-gal process first, and 3D printing is then carried out using the precursor pulp as raw material is molded without mould direct write, cures finally by high temperature sintering and obtains the adjustable optical window with three-dimensional yard structure.The present invention prepares slurry combination 3D printing technique using sol-gal process, being molded without mould direct write for optical window can be achieved, the molding optical window need to only use simple yard structure, by adjusting the diameter and spacing of dielectric rod in three-dimensional yard structure, adjusting of the window in terahertz wave band response characteristic can be achieved with.This method not only solves the unmanageable problem of complicated optical window, and structure is more fine, orderly, and better regulation and control can be carried out to THz wave.

Description

A kind of forming method of adjustable THz wave optical window and its application
Technical field
The present invention relates to 3D printing and Terahertz applied technical field, and in particular to a kind of adjustable THz wave optical window Forming method and its application.
Background technology
THz wave is caused due to the extensive use in fields such as astronomy, biomedicine, wireless communication, safety detections The concern of people.With the development of free electron laser and ultrafast technology, the generation of THz wave and detection technique also obtain Great development is arrived.And the research for being used to manipulate the THz wave optical window of THz wave propagation is due to preparation process etc. Reason is made slow progress, and restricts the development of Terahertz application technology.
THz wave optical window can regulate and control the electromagnetic wave of terahertz wave band, it is desirable to its media units cycle ruler Very little is a few micrometers to hundreds of micron dimensions.The method that tradition prepares THz wave optical window has laser direct-writing, stereosopic printing, micro- Grain assembling etc., but these method complex process, it is time-consuming it is too long, cost is higher, and material selection is required harsher.It is straight without mould Write forming is a kind of 3D printing technique with slurry extrusion molding, can by carrying out Reasonable Regulation And Control to the rheological property of slurry To prepare characteristic size baroque three-dimension device in the range of a few micrometers to several millimeters, can be good at meeting terahertz light Learn required precision prepared by window.
The content of the invention
Forming method and its application it is an object of the invention to provide a kind of adjustable THz wave optical window, this method The unmanageable problem of complicated optical window is not only solved, and structure is more fine, orderly, and THz wave can be carried out Better regulation and control.
To achieve these goals, the present invention uses following technical scheme：
A kind of forming method of adjustable THz wave optical window, this method prepare presoma using sol-gal process first Slurry, is then carried out 3D printing using the precursor pulp as raw material and is molded without mould direct write, cured finally by high temperature sintering and obtain There must be the adjustable optical window of three-dimensional yard structure.
The preparation process of the precursor pulp includes the following steps：
(1) preparation of the ethanol solution containing surfactant and metal ion：
Surfactant, metal alkoxide and ethanol are uniformly mixed to the acquisition second containing surfactant and metal ion Alcoholic solution；Wherein：The ratio of surfactant and metal alkoxide is (0.2-1) g:The volume ratio of 10mL, metal alkoxide and ethanol Example is 1:(0.5-1)；The surfactant is polyvinylpyrrolidone (average molecular weight is more than 50000) or polyethylene glycol.
(2) ammonia spirit is prepared：Volume ratio according to ammonium hydroxide, deionized water and ethanol is 1:(0.5-2)：(4-10) matches somebody with somebody System；
(3) ethanol solution containing surfactant and metal ion obtained by step (1) is pressed with ammonia spirit in step (2) Volume ratio 1:(0.5-2) is mixed, and hydrolytie polycondensation into gel, that is, obtains the precursor pulp under the conditions of 50-90 DEG C.
Gel obtained by above-mentioned steps (3) is oxide, nitride or carbide ceramics gel, according to selected gel kind Metal alkoxide in class selection step (1).
In above-mentioned steps (1), when the metal alkoxide is double (levulinic ketone group) diisopropyl titanate esters (TIA), step Suddenly the precursor pulp obtained in (3) is titania gel.
The 3D printing, using three-dimensional yard structure, adjusts medium in three-dimensional yard structure without in mould direct write forming process A diameter of 10-200 μm of rod, spacing is respectively 50-500 μm.
The high temperature sintering, which cures, to be cured using the technique of multistep heat preservation sintering, wherein：Often step heating rate is 0.5-2 DEG C/min, 450-1600 DEG C of holding temperature section, when often step soaking time is 2-5 small, naturally cools to after often step insulation Room temperature, keeps the temperature 2-4 times.
The above method of the present invention is used to be molded adjustable THz wave optical window, by adjusting optical window three-dimensional yard knot The diameter and spacing of dielectric rod in structure, realize adjusting of the window in terahertz wave band response characteristic.
The present invention has the following advantages and beneficial effect：
1st, the present invention using sol-gal process prepare slurry and combine 3D printing technique, it can be achieved that optical window it is straight without mould Write forming.
2nd, the molding optical window of the present invention need to only use simple yard structure, pass through dielectric rod in three-dimensional yard structure Diameter and spacing, can be achieved with adjusting of the window in terahertz wave band response characteristic.
Brief description of the drawings
Fig. 1 is yard structure Terahertz wave optical window microscopic appearance figure.
Fig. 2 is a diameter of 32 μm of dielectric rod, and dielectric rod spacing is that 112 μm of titanium dioxide ceramic terahertz waves optical window is saturating Penetrate collection of illustrative plates.
Fig. 3 is a diameter of 32 μm of dielectric rod, and dielectric rod spacing is that 140 μm of titanium dioxide ceramic terahertz waves optical window is saturating Penetrate collection of illustrative plates.
Fig. 4 is that keep medium rod diameter is constant in embodiment 3, as dielectric rod spacing changes band gap locations change curve.
Embodiment
Elaborate with reference to specific example to the embodiment of the present invention.Using too in following embodiments The transmitance of hertz time-domain spectroscopy instrument test THz wave optical window.
Embodiment 1
1. preparing titanium dioxide collosol and gel slurry：The medicine needed has double (levulinic ketone group) diisopropyl titanate esters (TIA), polyvinylpyrrolidone (PVP, average molecular weight 55000), absolute ethyl alcohol, ammonium hydroxide, deionized water, are hydrolyzed by TIA Obtain titania sol gel.Specific preparation method is that the PVP of 0.62g is completely dissolved in 8mL absolute ethyl alcohols, then is added Enter the TIA of 12.5mL, stir evenly, labeled as solution 1.；It is anhydrous that 1.8mL deionized waters and 1.34mL ammonium hydroxide are added to 8mL Stirred evenly in ethanol, labeled as solution 2.；1. and 2. solution is uniformly mixed, 80 DEG C of heating water bath stir abouts 1 are formed when small Gel, the volume of gel is about 2mL at this time, is loaded into stand-by in 5mL barrels.
2. writing yard structure 3D printing program, dielectric rod spacing is set as 200 μm, selects the syringe needle of 60 μm of diameter, pressure Power is set as 80psi, and successively printing obtains titania gel optical window, such as Fig. 1.
3. titania gel optical window is subjected to high-temperature process：Heating rate is arranged on 1 DEG C/min, at 400 DEG C and Be warming up to after when 600 DEG C of each insulations 4 are small 1200 DEG C of insulations 4 it is small when, re-segmenting is cooled to room temperature.Obtain a diameter of 32 μ of dielectric rod M, spacing are 112 μm of titanium dioxide ceramic optical window.
4. pair titanium dioxide ceramic optical window carries out tera-hertz spectra test, by Fast Fourier Transform, light is obtained Subband gap collection of illustrative plates, such as Fig. 2.
Embodiment 2
1. according to step 1 the method preparing titanium dioxide collosol and gel slurry in embodiment 1.
2. writing yard structure 3D printing program, dielectric rod spacing is set as 250 μm, selects the syringe needle of 60 μm of diameter, pressure Power is set as 80psi, and successively printing obtains titania gel optical window.
3. pair titania gel optical window carries out high-temperature process：Heating rate is arranged on 1 DEG C/min, at 400 DEG C and Be warming up to after when 600 DEG C of each insulations 4 are small 1200 DEG C of insulations 4 it is small when, re-segmenting is cooled to room temperature.Obtain a diameter of 32 μ of dielectric rod M, spacing are 140 μm of titanium dioxide ceramic optical window.
4. pair titanium dioxide ceramic optical window carries out tera-hertz spectra test, by Fast Fourier Transform, light is obtained Subband gap collection of illustrative plates, such as Fig. 3.
Embodiment 3
Difference from Example 1 is：Multiple and different dielectric rod spacing is selected in 2 in step, selects 60 μm of diameter Syringe needle, after step 3 high-temperature process, obtain a diameter of 32 μm of dielectric rod, dielectric rod spacing is respectively 112 μm, 140 μm, 168 μm, 196 μm of titanium dioxide ceramic optical window.
A diameter of 32 μm of dielectric rod, dielectric rod spacing are respectively 112 μm, 140 μm, 168 μm, 196 μm of titanium dioxide pottery Porcelain THz wave optical window band gap variation figure such as Fig. 4.
As can be seen from the above-described embodiment, by adjusting dielectric rod in optical window three-dimensional yard structure diameter and Away from can realize adjusting of the optical window in terahertz wave band response characteristic.Keep medium rod diameter is constant, between dielectric rod Away from increase, band gap locations gradually to low frequency direction move.
Above-described embodiment only refers to, and there is colloidal sol similar with this patent or extending from this patent thinking to coagulate The manufacture method of glue method 3D printing THz wave optical window, the protection domain in this patent.

Claims (9)

  1. A kind of 1. forming method of adjustable THz wave optical window, it is characterised in that：This method uses sol-gal process first Precursor pulp is prepared, 3D printing is then carried out using the precursor pulp as raw material is molded without mould direct write, finally by high temperature Sintering curing obtains the adjustable optical window with three-dimensional yard structure.
  2. 2. the forming method of adjustable THz wave optical window according to claim 1, it is characterised in that：The presoma The preparation process of slurry includes the following steps：
    (1) preparation of the ethanol solution containing surfactant and metal ion：
    It is molten that surfactant, metal alkoxide and ethanol are uniformly mixed to the acquisition ethanol containing surfactant and metal ion Liquid；Wherein：The ratio of surfactant and metal alkoxide is (0.2-1) g:The volume ratio of 10mL, metal alkoxide and ethanol is 1:(0.5-1)；
    (2) ammonia spirit is prepared：Volume ratio according to ammonium hydroxide, deionized water and ethanol is 1:(0.5-2)：(4-10) is prepared；
    (3) ethanol solution obtained by step (1) containing surfactant and metal ion and ammonia spirit in step (2) are pressed into volume Ratio 1:(0.5-2) is mixed, and hydrolytie polycondensation into gel, that is, obtains the precursor pulp under the conditions of 50-90 DEG C.
  3. 3. the forming method of adjustable THz wave optical window according to claim 2, it is characterised in that：Step (3) institute It is oxide, nitride or carbide ceramics gel to obtain gel, and the metal in step (1) is selected according to selected gel variations Alkoxide.
  4. 4. the forming method of adjustable THz wave optical window according to claim 2, it is characterised in that：In step (1) The metal alkoxide is double (levulinic ketone group) diisopropyl titanate esters (TIA), and the precursor pulp obtained in step (3) is two Titanium oxide gel.
  5. 5. the forming method of adjustable THz wave optical window according to claim 2, it is characterised in that：In step (1), The surfactant is polyvinylpyrrolidone (average molecular weight is more than 50000) or polyethylene glycol.
  6. 6. the forming method of adjustable THz wave optical window according to claim 1, it is characterised in that：The 3D printing Without in mould direct write forming process, using three-dimensional yard structure, a diameter of 10-200 μm of dielectric rod in three-dimensional yard structure is adjusted, Spacing is respectively 50-500 μm.
  7. 7. the forming method of adjustable THz wave optical window according to claim 1, it is characterised in that：The high temperature is burnt Knot, which cures, to be cured using the technique of multistep heat preservation sintering, wherein：It is 0.5-2 DEG C/min often to walk heating rate, insulation temperature 450-1600 DEG C of section is spent, when often step soaking time is 2-5 small, room temperature is naturally cooled to after often step insulation, keeps the temperature 2-4 times.
  8. 8. the application of the forming method of adjustable THz wave optical window according to claim 1, it is characterised in that：The party Method is used to be molded adjustable THz wave optical window.
  9. 9. the application of the forming method of adjustable THz wave optical window according to claim 8, it is characterised in that：Pass through The diameter and spacing of dielectric rod in optical window three-dimensional yard structure are adjusted, realizes the window in terahertz wave band response characteristic Adjust.
CN201610898039.9A 2016-10-14 2016-10-14 Forming method and application of adjustable terahertz wave optical window Active CN107954711B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201610898039.9A CN107954711B (en) 2016-10-14 2016-10-14 Forming method and application of adjustable terahertz wave optical window

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201610898039.9A CN107954711B (en) 2016-10-14 2016-10-14 Forming method and application of adjustable terahertz wave optical window

Publications (2)

Publication Number Publication Date
CN107954711A true CN107954711A (en) 2018-04-24
CN107954711B CN107954711B (en) 2021-02-02

Family

ID=61954324

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201610898039.9A Active CN107954711B (en) 2016-10-14 2016-10-14 Forming method and application of adjustable terahertz wave optical window

Country Status (1)

Country Link
CN (1) CN107954711B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111290065A (en) * 2018-12-07 2020-06-16 中国科学院金属研究所 Microfluidic-controlled three-dimensional terahertz wave optical window and preparation method and application thereof

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008112713A1 (en) * 2007-03-13 2008-09-18 Nanoink, Inc. Nanolithography with use of viewports
CN103757618A (en) * 2014-01-08 2014-04-30 同济大学 Preparation method of antireflection film applicable to different bases
CN104909404A (en) * 2015-06-01 2015-09-16 天津市职业大学 Stable nano-titanium dioxide hydrosol and preparation method thereof
CN105551009A (en) * 2015-12-17 2016-05-04 哈尔滨工业大学 Image fusion method based on continuous Terahertz confocal scanning polarization imaging

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008112713A1 (en) * 2007-03-13 2008-09-18 Nanoink, Inc. Nanolithography with use of viewports
CN103757618A (en) * 2014-01-08 2014-04-30 同济大学 Preparation method of antireflection film applicable to different bases
CN104909404A (en) * 2015-06-01 2015-09-16 天津市职业大学 Stable nano-titanium dioxide hydrosol and preparation method thereof
CN105551009A (en) * 2015-12-17 2016-05-04 哈尔滨工业大学 Image fusion method based on continuous Terahertz confocal scanning polarization imaging

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
CARMEN R.TUBIO ET AL.: "3D printing of Al2O3 photonic crystals for terahertz frequencies", 《RSC ADV.》 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111290065A (en) * 2018-12-07 2020-06-16 中国科学院金属研究所 Microfluidic-controlled three-dimensional terahertz wave optical window and preparation method and application thereof
CN111290065B (en) * 2018-12-07 2021-09-28 中国科学院金属研究所 Microfluidic-controlled three-dimensional terahertz wave optical window and preparation method and application thereof

Also Published As

Publication number Publication date
CN107954711B (en) 2021-02-02

Similar Documents

Publication Publication Date Title
CN105467511B (en) A kind of Bi/Er or Bi/Er/Al is co-doped with silica fibre and preparation method thereof
CN103820945A (en) Preparation method of organic/inorganic hybridization nano super-hydrophobic fiber film
CN105467512B (en) A kind of Bi/Al is co-doped with silica fibre and preparation method thereof
CN107954711A (en) A kind of forming method of adjustable THz wave optical window and its application
Xie et al. Microwave processing and properties of Ce–Y–ZrO2 ceramics with 2.45 GHz irradiation
CN104609723A (en) Preparation method of chalcogenide glass tapered fibers
CN102241508B (en) Preparation method of high density BaTi2O5 bulk
CN107957404B (en) Method for regulating response characteristic of terahertz wave optical window
CN107991735B (en) Metal capillary cyclic olefin polymer dielectric film Terahertz hollow-core fiber and preparation
Saligheh et al. Production and characterization of zirconia (ZrO2) ceramic nanofibers by using electrospun poly (vinyl alcohol)/zirconium acetate nanofibers as a precursor
CN105776886A (en) Preparation method of silicon oxide anti-reflection film with low refraction rate
CN106987811B (en) A kind of temperature magnetic field film-sensing material and preparation method thereof
CN102531539A (en) Manufacture method of dielectric substrate and metamaterial
KR101798301B1 (en) Method of graphene oxide film
CN109188730A (en) A kind of broadband terahertz wave modulator, preparation method and modulating system
CN108796452A (en) A kind of vanadium dioxide film and its preparation method and application
CN110119038B (en) Thermal field adjustable terahertz wave optical window and preparation method and application thereof
CN209989625U (en) Continuous microwave treatment device for ceramic long fiber
CN110408070B (en) High-threshold-value scratch-resistant high-transmittance fundamental-frequency laser film and preparation method thereof
CN108121090B (en) A kind of THz wave flexible optical window and its preparation method and application of field of force regulation
Jin et al. Effects of atmosphere on the microstructure and magnetic properties of strontium ferrites with microwave-assisted sintering
CN105071215A (en) Purpose of CaCuSi4O10 two-dimensional crystal, and saturation absorber device composed of the crystal
CN105866886B (en) The terahertz polarization beam splitter of a variety of airport hollow out slab constructions
CN109279873A (en) The ultralow temperature preparation method of tin indium oxide target material
CN107779969A (en) Preparation method of hollow ceramic fiber

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
GR01 Patent grant
GR01 Patent grant