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30 results about "Dielectric sphere" patented technology
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A dielectric sphere of radius R with uniform dielectric constant ε has an azimuthally symmetric density charge σ = σ0 cos θ placed on the surface. Outside the sphere is vacuum. (a) Obtain the electrostatic potential inside the sphere, φin.
Collision avoidance system for use in aircraft
InactiveUSRE39053E1Low costAntenna supports/mountingsAntenna adaptation in movable bodiesElectricityOn board
A collision avoidance system mountable on an aircraft for providing to the pilot of that aircraft an early warning of the presence of another nearby threat aircraft within the surrounding air space. The system operates autonomously from that aircraft and does not require the presence of any matched system on board the threat aircraft. The system includes an omni-directional L-band microwave antenna formed by a dielectric sphere cut into eight equal “orange wedge” sectors covering eight distinct beam patterns. Eight L-band microwave signals are transmitted simultaneously from all eight dielectric sectors to provide a sphere of detection around the aircraft. The sectors also act as receivers for detecting a microwave signal reflected back from the threat aircraft, and indicating means provides information to the pilot regarding the direction, closeness and rate of closure of the threat aircraft.
Owner:FLIGHT SAFETY TECH
Sphere-supported thin film phosphor electroluminescent devices
InactiveUS20070069642A1Discharge tube luminescnet screensElectroluminescent light sourcesPhosphorDielectric sphere
The present invention provides an electroluminescent display device using dielectric spheres embedded in a flexible electrically conducting substrate. Each of the spherical dielectric particles has a first portion protruding through a top surface of the substrate and a second portion protruding through the bottom surface of the substrate. An electroluminescent phosphor layer is deposited on the first portion of each spherical dielectric particles and a continuous electrically conductive, substantially transparent electrode layer is located on the top surfaces of the electroluminescent phosphor layer and areas of the flexible electrically insulating substrate located between the top surfaces of the electroluminescent phosphor layer. A continuous electrically conductive electrode layer coated on the second portion of the spherical dielectric particles and areas of the flexible, electrically insulated substrate located between the second portions of the spherical dielectric particles.
Owner:NANOLUMENS ACQUISITION
Surface deformation measuring system with a retro-reflective surface treatment
A system for measuring deformation of at least one surface of an object including an interferometer for receiving illumination reflected from the surface of the object, and a surface treatment disposed on the surface of the object for providing a retro-reflective patina. The retro-reflective patina is configured to reflect the illumination from the surface of the object. The retro-reflective patina is attached to the surface of the object and may include a plurality of cube corners, or a plurality of dielectric spheres, or a combination of cube corners and dielectric spheres. Impinging light onto the object is provided by an optical source that may be separate from or integral to the interferometer. The impinging light may be directed toward the object through an objective lens, which is also used for receiving the illumination from the object. Alternatively, the impinging light may be directed toward the object by first bypassing the objective lens.
Owner:HARRIS CORP
Double-broadband near infrared absorber
The invention discloses a double-broadband near infrared absorber which comprises a substrate, wherein a first metal film layer with a thickness not less than 100 nanometers is deposited on the substrate; a single layer of dielectric spheres are densely stacked and arrayed on the first metal film layer; and a second metal film layer is deposited on the single layer of dielectric spheres. The double-broadband near infrared absorber has a perfect absorption effect on broadband near infrared electromagnetic waves which are incident by large angles, and is insensitive to polarization characteristics of the near infrared electromagnetic waves. In practical use, as the electromagnetic environment is complicated, oblique incident waves are more common than normal incident waves and incident waves with various polarization characteristics are more common than incident waves with a single polarization characteristic, the double-broadband near infrared absorber provided by the invention can be favorably adapted to the complicated electromagnetic environment. The double-broadband near infrared absorber provided by the invention has the advantages of being simple in preparation process, low in cost, high in repeatability and large-scale in production, and has a large application prospect in the field of electromagnetic energy absorption, detection, conversion and the like.
Owner:NANJING UNIV
Subwavelength coatings and methods for making and using same
ActiveUS20160033685A1Increase in sizeGood dispersionVacuum evaporation coatingSputtering coatingSelf assembleElectromagnetic spectrum
Methods are disclosed for forming subwavelength coatings for use in the UV, visible, or infrared part of the electromagnetic spectrum. A first material and a second material are deposited onto a substrate. The first material may include dielectric spheres of subwavelength size that self-assemble on the substrate to form a template or scaffold with subwavelength size voids between the spheres into which the second material is deposited or filled. First and second materials are heated on the substrate at a preselected temperature to form the subwavelength coating.
Owner:BATTELLE MEMORIAL INST
Frequency conversion power saving control method of ball mill
InactiveCN101797529AImprove grinding qualityReduce power consumptionGrain treatmentsFrequency changerLoad torque
The invention discloses a frequency conversion power saving control method of a ball mill, which is realized with the following method: 1. starting a ball mill, and initializing a preset controller in the ball mill; 2. operating the ball mill according to the preset frequency; 3. detecting the stator current instantaneous value of the stator current of the AC asynchronous motor of the ball mill, and detecting the stator current instantaneous value by a U\V\W three-phase current Hall sensor arranged in a transducer; 4. calculating the average torque current, current undulation frequency and amplitude of the stator current of the AC asynchronous motor of the ball mill, obtaining the current torque component, current undulation frequency and amplitude according to the rotor magnetic field orientation and vector change on a synchronous rotating coordinate system; 5. in the grinding initial stage, controlling the cylinder of the ball mill to carry out pendular movement according to the calculation result so as to obtain the effect that a dielectric sphere and grinding material are in parabola falling state in the cylinder; and 6. in the middle and later grinding stage, controlling frequency to continuously drop according to the control frequency calculation result of a loading torque.
Owner:深圳市伟创电气有限公司
Luneberg lens with variable RCS
The invention discloses a Luneberg lens with a variable RCS. The Luneberg lens comprises a dielectric sphere, a reflecting surface and an adjusting rod, wherein the dielectric ball is composed of multiple dielectric layers with dielectric constants changing in sequence; one end of the adjusting rod is fixedly connected with the reflecting surface, and the other end is connected with the driving mechanism; the adjusting rod is controlled by the driving mechanism to move, so that the reflecting surface is driven to move, and the RCS characteristics of the Luneberg ball are adjusted by changing the relative positions of the multilayer dielectric ball and the reflecting surface. According to the invention, the RCS of the Luneberg lens is changed by changing the relative positions of the multilayer dielectric ball and the reflecting surface; the Luneberg lens with the variable RCS can be used in cooperation with a target needing to change the RCS, and meanwhile, the variable RCS Luneberg lens is also suitable for various occasions needing to adjust the RCS.
Owner:NO 60 RES INST OF GENERAL STAFF DEPT PLA
Sandwich structure for enhancing luminous intensity of photoluminescence of luminous film and preparation method of sandwich structure
ActiveCN103756671ALow priceSuitable for industrial scale applicationsThin material handlingLuminescent compositionsTriboluminescenceLuminous intensity
The invention relates to a sandwich structure for enhancing luminous intensity of photoluminescence of luminous film and a preparation method of the sandwich structure. The sandwich structure is a sandwich structure of substrate-luminous film-monolayer dense-paving sphere array formed by densely paving a micrometern transparent dielectric sphere monolayer on the luminous film; the used micrometer transparent dielectric spheres have relatively high transmissivity to wave lengths of exciting light and fluorescent light in the photoluminescence; the used fluorescence enhancing medium-micrometer transparent dielectric spheres are low in price and are suitable for industrial large-scale application. The used micrometer transparent dielectric spheres are not oxidized under air environment and can be used for steadily enhancing the luminous intensity of the fluorescence of the luminous film for a long time; the used micrometer transparent dielectric spheres have no requirements on the luminous film; the substrate can be nonmetal or metal, and due to substrate, the application range of the luminescence enhancement technology of the photoluminescence of the luminous film is effectively extended.
Owner:BEIJING UNIV OF TECH
Zinc oxide micro/nano composite structure array film and preparation method thereof
InactiveCN102167278AHigh surface areaHigh activityDecorative surface effectsIndividual molecule manipulationZinc oxide nanorodIon sputtering
The invention discloses a zinc oxide micro / nano composite structure array film and a preparation method thereof. In the film, an ordered hexagonal single-layer sphere array is arranged on a substrate; each sphere consists of a dielectric sphere, and a gold film and a zinc oxide nano-stick / cone coated in sequence on the outer surface of the dielectric sphere; the outer diameter of the dielectric sphere is 1-30 mum; the thickness of the gold film is 5-50 mum; the stick / cone axis of the zinc oxide nano-stick / cone is vertical to a sphere center; the length of the stick / cone is 200-800 nanometers; the diameter of the stick / cone is 80-160 nanometers; and the taper of the cone is 3-30 degrees. The method comprises the following steps of: performing ion sputtering and gold film deposition on the substrate with a single-layer crystal template at the pressure of 5-10 Pa to obtain a gold film sphere array; putting the gold film sphere array in zinc oxide electrolyte with the temperature of 60-80 DEG C; and performing electrolytic deposition at the deposition current density of between -0.3 mA / cm<2> and -2.0 mA / cm<2> by adopting a three-electrode method for 30 minutes to 4 hours to obtain the zinc oxide micro / nano composite structure array film. The film can be widely applied to the fields of photoelectronic devices, surface microfluids, sensors and the like.
Owner:HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
Re-entrant resonant cavities, filters including such cavities and method of manufacture
A re-entrant microwave resonant cavity comprises a stub 6 . A cylindrical wall 2 , first end wall 3 and the stub 6 are integrally formed. A second end wall 4 is defined by a metallization layer 8 deposited on a printed circuit board substrate 9 . The parts are joined using surface mount soldering processes. The end 11 of the stub 6 defines a gap 12 . A rostrum 14 faces the end of the stub 6 . The rostrum 14 is manufactured separately and then fixed to the substrate 9 . A dielectric sphere 16 is located between the end 11 of the probe 6 and the rostrum 14 . The dielectric sphere 16 maintains the gap size during use and aids in correct positioning of the parts during manufacture.
Owner:LUCENT TECH INC
Spher-supported thin film phosphor electroluminescent devices
The present invention provides an electroluminescent display device using dielectric spheres embedded in a flexible electrically conducting substrate. Each of the spherical dielectric particles has a first portion protruding through a top surface of the substrate and a second portion protruding through the bottom surface of the substrate. An electroluminescent phosphor layer is deposited on the first portion of each spherical dielectric particles and a continuous electrically conductive, substantially transparent electrode layer is located on the top surfaces of the electroluminescent phosphor layer and areas of the flexible electrically insulating substrate located between the top surfaces of the electroluminescent phosphor layer. A continuous electrically conductive electrode layer coated on the second portion of the spherical dielectric particles and areas of the flexible, electrically insulated substrate located between the second portions of the spherical dielectric particles.
Owner:NANOLUMENS ACQUISITION
Catalytic phase change dielectric sphere for methanol combustion and preparation method of catalytic phase change dielectric sphere
ActiveCN109908932ASolve sintering agglomerationIncrease transfer ratePhysical/chemical process catalystsFurnace temperatureSemiconductor materials
The invention discloses a catalytic phase change dielectric sphere for methanol combustion and a preparation method of the catalytic phase change dielectric sphere. The catalytic phase change dielectric sphere is mainly prepared from a high-temperature phase change material component, an active material component, a carrier material component, a catalyst component, a nano-semiconductor material component, a nano-transition metal component and an adhesive component. According to the catalytic phase change dielectric sphere, a catalytic phase change dielectric solid sphere can be prepared with amixed pressing and sintering process, methanol energy conversion rate can reach 87.5% in a methanol combustion process, the furnace temperature of methanol combustion can reach 900 DEG C or higher, and waste heat recovery is realized; or, a catalytic phase change dielectric microporous hollow sphere is prepared through electrostatic adsorption and in-situ redox reaction, the methanol energy conversion rate can reach 99% or higher in the methanol combustion process, the furnace temperature of methanol combustion can reach 1000 DEG C or higher, and waste heat recovery is realized.
Owner:苏斌
Negative temperature coefficient (NTC) thermosensitive resistor and preparation method therefor
InactiveCN106448973AHigh parameter requirementsHigh precisionNegative temperature coefficient thermistorsFerric oxidesSesquioxideCopper oxide
The invention provides a negative temperature coefficient (NTC) thermosensitive resistor. The NTC thermosensitive resistor comprises the following raw materials based on parts: 48-52 parts of manganese dioxide, 20-25 parts of carbon trioxide, 19-22 parts of nickel oxide, 6-8 parts of copper oxide, 2-3 parts of iron trioxide, 1-3 parts of cobalt sesquioxide, 90-160 parts of absolute ethyl alcohol, 120-450 parts of zirconium oxide spheres, and 8-16 parts of silicon dioxide. The NTC thermosensitive resistor provided by the invention, through optimization, combination and determination of selection of basic components, dosage, ball-milling dielectric spheres and technological method, the following technical index requirement having extremely high parameter requirement and relatively high product precision requirement are finally achieved: the resistance is 0.291-0.309K<omega> at a temperature of 140 DEG C; the room temperature resistance is 7.9-8.9K<omega>; a material constant B (25 / 140) is 3,536-3,600K; and the temperature detection range is improved to be 140 DEG C, so that the NTC thermosensitive resistor is suitable for being used as a temperature sensing transmitter in an electric motor overtemperature protection apparatus.
Owner:陆川县华鑫电子厂
Process for preparing Si base Bi4 Ti3 O12 ferroelectric film
InactiveCN1372334AQuality improvementVolatilePiezoelectric/electrostrictive device manufacture/assemblyHYDROSOLTitanic acid
This invention provides a processing method of Bi1Ti3O12 silicon group ferroelectric water employing butyl titanic acid, glacial acetic acid, bismuth nitrate, and acetylacetone to make up Bi1Ti3O12 sol at the mole rate of 3.00:4.20-4.40 of bytyl titanic acid and bismuth nitrate, the volume percentages of glacial acetic acid, acetylacetone and butyl titanic acid and 10-80%:10-80%:10% separately, by selecting 100 crystal p-type monocrystalline silicon as the substrate, to put drops of sol on it and even it to a moisture wafer to be dried by a fire and annealing to form the desired thickenss of BIT ferroelectric chip by repeating the abore processions of evening gel drying treatment and annealing, which can be used in the process of accumulator with good comprehensive performance in the structure, ferroelectric and dielectric spheres.
Owner:HUAZHONG UNIV OF SCI & TECH
Detection device of static material layer thickness between dielectric spheres
ActiveCN103256877AThe experimental data is accurateOptimum Process ParametersMechanical thickness measurementsEngineeringLayer thickness
The invention discloses a detection device of a static material layer thickness between dielectric spheres. The detection device comprises a support, guide rods are respectively fixed at the upper end of the support and the lower end of the support, a moving base is arranged on the guide rods, the moving base can slide along the guide rods in a left-and-right mode, a first ejecting rod is fixedly arranged at one end of the support, a first ruler rod is fixedly arranged on the first ejecting rod, one end of a screw rod is connected with a hand wheel in a rotating mode, the other end of the screw rod is connected with the moving base in a threaded mode, the hand wheel pushes the screw rod to rotate so as to drive the moving base to move along the guide rods in a left-and-right mode, the moving base is connected with one end of a force measuring device, the other end of the force measuring device is connected with a second ejecting rod, a second ruler rod is fixedly arranged on the second ejecting rod, and a V-shaped guide plate is arranged between the two guide rods which are arranged between the first ejecting rod and the second ejecting rod. According to the detection device of the static material layer thickness between the dielectric spheres, the static thickness of the squeezed material layer between the dielectric spheres can be effectively measured through measurement of change of distance between the two ruler rods, and more accurate experiment data can be provided for ball milling process design.
Owner:ZHEJIANG UNIV OF TECH
Luneberg lens antenna applied to S waveband
PendingCN112216983AHigh gainImprove working bandwidthWaveguide hornsIndividually energised antenna arraysPolystyreneEngineering
The invention provides a luneberg lens antenna applied to an S waveband, which comprises dielectric spheres and a feed source array used for realizing beam control and scanning capability, the feed source array is uniformly arranged along the peripheries of the dielectric spheres, and the dielectric spheres adopt a layered structure. Materials of each layer of structure of the dielectric sphere include but are not limited to high-dielectric-constant materials such as polystyrene and barium copper titanate. By optimizing the dielectric constant and the thickness of each layer of structure of the dielectric spheres, the convergence effect of the dielectric spheres on feed source array beams is adjusted, the standing-wave ratios of the horn feed source at two cross polarization ports of 1.7 GHz and 2.7 GHz can be smaller than 1.5, and the isolation degree between the feed source ports is larger than 30 dB. Moreover, after the dielectric lens is added, the wave beam width of the lens is obviously narrowed compared with the wave beam width of the feed source, so that the antenna provided by the invention has higher gain, larger working bandwidth and better wave beam coverage capability.
Owner:江苏晨创科技有限公司
Luneberg lens reflector and passive radar reflection ball comprising same
ActiveCN112350074AEasy to achieve dielectric constant distributionSolve the reflective area problemWave based measurement systemsAntennasPassive radarAnti jamming
The invention relates to a Luneberg lens reflector and a passive radar reflection ball comprising the Luneberg lens reflector. The Luneberg lens reflector is formed by printing through the 3D technology, the passive radar reflection ball comprises a wave lens reflector ball, the Luneberg lens reflector further comprises a chassis and a hollow shell, the chassis is fixedly connected to the bottom of the shell, and a handle is arranged on the outer wall of the shell; the luneberg lens reflector is arranged in the shell, the dielectric constant of the dielectric sphere layer is gradually reducedfrom the sphere center to the outside, and a reflection area is arranged at the bottom of the luneberg lens reflector. The Luneberg lens reflector has a better reflection effect, the passive radar reflection balls are high in anti-interference capability, a plurality of passive radar reflection balls are connected in series to form a passive cascaded radar reflection ball false target, and the problems that the reflection area is limited and reflection signals are interfered by the environment in passive radar signal simulation are solved.
Owner:XIAMEN HUAXIA UNIV
Ship vibration energy collecting device based on friction nanometer generator
InactiveCN113300630AIncrease profitImprove power generation efficiencyFriction generatorsMedium frequencyEngineering
The invention provides a ship vibration energy collecting device based on friction nano-generators, and relates to the technical field of friction nano-generators. The ship vibration energy collecting device comprises a power generation part and a power storage part which are connected, and the power generation part comprises a plurality of friction nano-generators; the friction nanometer generator comprises a hollow cubic shell and a dielectric ball arranged in the shell, the diameter of the dielectric ball is smaller than the shortest edge of the cubic shell, six inner surfaces of the shell are respectively provided with an electrode, and the dielectric ball is forced to vibrate in the shell and is in contact with and separated from the electrodes. By arranging the array type friction nanometer generator, vibration energy in multiple directions can be collected, and the vibration energy collecting device is suitable for vibration in a low-medium frequency range and can be perfectly suitable for collecting vibration energy on a ship.
Owner:DALIAN MARITIME UNIVERSITY
Subwavelength coatings and methods for making and using same
ActiveUS9580793B2Good dispersionIncrease in sizeVacuum evaporation coatingSputtering coatingSelf assembleElectromagnetic spectrum
Owner:BATTELLE MEMORIAL INST
A method for exfoliating coal-measure hard kaolinite that keeps kaolinite crystal form
Owner:CHINA UNIV OF MINING & TECH (BEIJING)
Plasma processing device of gaseous waste
ActiveCN108738223ALow costEfficient treatment of gaseous wastePlasma techniqueSpherical formPlasma processing
The invention relates to a plasma processing device of gaseous waste. The plasma processing device comprises a container (101), a plasma electrode and a high-voltage source, wherein the plasma electrode comprises a columnar first plasma electrode (108) and a cylindrical second plasma electrode (104), the columnar first plasma electrode (108) is arranged in the container and extends along an axialline of the container, the cylindrical second plasma electrode (104) encircles the first plasma electrode along a circumferential direction of the container, a cylindrical or columnar dielectric partis arranged between the first plasma electrode and the second plasma electrode and comprises a plurality of dielectric spheres, each dielectric sphere is of a hollow spherical structure, and a plurality of air holes are formed in spherical surfaces along radial directions. The plasma processing device of the gaseous waste is small in size, low in cost and high in efficiency.
Owner:航天环保(北京)有限公司
Method and device for conducting impact crushing on brittle fine granular layers through pneumatic dielectric spheres
The invention provides a fine-grained brittle granular layer impact crushing method and device. The problems that for an existing ball-milling device, the impact force is different in size, the material layer thickness is uncontrollable, steel consumption is high, and the energy utilization rate is low are solved. The device for conducting impact crushing on brittle fine granular layers through pneumatic dielectric spheres comprises a high-frequency reciprocating type cylinder impacting system, a material platform rotary system, a material layer loosening and negative pressure screening system and a material inputting and material layer arrangement system. Accordingly, on the basis of the principle that when the material layer granules are impacted by the dielectric spheres, the crushing efficiency is affected by the dielectric sphere diameters, impact force size, material layer thickness and granule size, by keeping the stable material layer state and accurate dielectric sphere diameter and impact force, the crushing efficiency of single impact of the dielectric spheres on the material layers is improved, and scale production is achieved through high-frequency impact and cylinder close-arrangement, and industrial application is promoted.
Owner:ZHEJIANG COLLEGE OF ZHEJIANG UNIV OF TECHOLOGY
Wave-plate-shaped wave energy collecting device based on triboelectric nanogenerator
ActiveCN113676077AIncrease contact areaImprove output performanceBatteries circuit arrangementsMachines/enginesNanogeneratorElectrical battery
The invention provides a wave-plate-shaped wave energy collection device based on a friction nanometer generator, and relates to the field of wave energy collection, the wave-plate-shaped wave energy collection device comprises a power generation part formed by connecting a plurality of power generation units in parallel, an energy storage capacitor and electric equipment. Each power generation unit comprises a rectangular zigzag plate; a pair of first electrodes is attached to the outer portions of the upper surface and the lower surface of the zigzag plate; a pair of second electrodes is arranged on the outer sides of the first electrodes; grooves of the first electrodes and the second electrodes form dielectric channels; a plurality of dielectric balls are arranged in the dielectric channels; and flat plates are arranged on the outer sides of the second electrodes. According to the invention, power can be directly supplied to marine equipment or a sensor, after a self-charging energy system is formed by a super capacitor or a battery, wave energy, ocean current energy and other energy can be directly collected, and various marine equipment can be continuously driven without an energy management circuit with a relatively large volume.
Owner:DALIAN MARITIME UNIVERSITY
Combined purification system of reed wetland and composite porous media ball and its construction method and application
InactiveCN104556589BEfficient removalRemove noneOther chemical processesMultistage water/sewage treatmentPorous mediumWater quality
The invention relates to a combined purification system of a reed wetland and a composite porous medium ball as well as a construction method and the application of the combined purification system. The system is used for absorbing and purifying ashimita aquaculture effluent water. The ashimita aquaculture effluent water firstly flows into a reed pond of the reed wetland uniformly through an overflow weir and then is naturally purified for the first time; after being purified by the reed wetland, the ashimita aquaculture effluent water is purified by the coal cinder-zeolite composite porous medium ball in an active purification filter tank in an intensified way; the purified water flows back into the ashimita aquaculture water. The combined purification system is capable of effectively removing ammonia nitrogen and organic matters in the water, has the advantages of being free of pollution, low in cost, easy to operate and convenient to maintain and manage, is be used in an ecological repairing method and can be widely applied to maintaining and improving the quality of the ashimita aquaculture water.
Owner:OCEAN UNIV OF CHINA
Analytical Method of Electromagnetic Scattering by Multilayer Spin Electromagnetic Anisotropic Dielectric Ball
Owner:HANGZHOU DIANZI UNIV
An Accurate Method for Calculating Electromagnetic Scattering of Bi-Anisotropic Dielectric Spheres
InactiveCN103235888BElectromagnetic scattering appliesSpecial data processing applicationsMaxwell's equationsMagnetic flux
The invention proposes a method for accurately calculating electromagnetic scattering of double anisotropic dielectric spheres. The steps of the present invention are as follows: 1. Utilize the eigenequation of passive Maxwell's equations and double anisotropy medium to deduce the magnetic induction intensity B The differential equation of ; 2. Neutralize the differential equation B The related factors are expressed in the form of spherical vector wave function, and then use the spherical vector wave function M,N The orthogonal nature of the matrix equation can be obtained by using the matrix equation with parameters. Firstly, the parameters of the matrix equation are calculated by using the matrix equation to satisfy the non-zero solution conditions, and then the parameters are substituted back into the matrix equation with parameters to obtain the non-zero solution of the matrix equation. ; 3. Construct a new function, use the new function? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? Re-expression of magnetic flux density B， Furthermore, the electromagnetic field inside the dielectric sphere is obtained, and then the electromagnetic field inside the dielectric sphere, the incident electromagnetic field outside the sphere, and the scattered electromagnetic field are substituted into the boundary conditions to obtain the scattering matrix. The invention is suitable for solving the electromagnetic scattering of the bi-anisotropic dielectric sphere with small electrical size.
Owner:HANGZHOU DIANZI UNIV
A device for crushing brittle fine particle layer by impact of pneumatic medium ball
Owner:ZHEJIANG COLLEGE OF ZHEJIANG UNIV OF TECHOLOGY
Process for preparing Si base Bi4 Ti3 O12 ferroelectric film
InactiveCN1160806CQuality improvementVolatilePiezoelectric/electrostrictive device manufacture/assemblyAcetic acidFerroelectric thin films
This invention provides a processing method of Bi1Ti3O12 silicon group ferroelectric water employing butyl titanic acid, glacial acetic acid, bismuth nitrate, and acetylacetone to make up Bi1Ti3O12 sol at the mole rate of 3.00:4.20-4.40 of bytyl titanic acid and bismuth nitrate, the volume percentages of glacial acetic acid, acetylacetone and butyl titanic acid and 10-80%:10-80%:10% separately, by selecting 100 crystal p-type monocrystalline silicon as the substrate, to put drops of sol on it and even it to a moisture wafer to be dried by a fire and annealing to form the desired thickenss of BIT ferroelectric chip by repeating the abore processions of evening gel drying treatment and annealing, which can be used in the process of accumulator with good comprehensive performance in the structure, ferroelectric and dielectric spheres.
Owner:HUAZHONG UNIV OF SCI & TECH
Zinc oxide micro/nano composite structure array film and preparation method thereof
InactiveCN102167278BHigh surface areaHigh activityDecorative surface effectsIndividual molecule manipulationElectrolytic agentGold film
The invention discloses a zinc oxide micro / nano composite structure array film and a preparation method thereof. In the film, an ordered hexagonal single-layer sphere array is arranged on a substrate; each sphere consists of a dielectric sphere, and a gold film and a zinc oxide nano-stick / cone coated in sequence on the outer surface of the dielectric sphere; the outer diameter of the dielectric sphere is 1-30 mum; the thickness of the gold film is 5-50 mum; the stick / cone axis of the zinc oxide nano-stick / cone is vertical to a sphere center; the length of the stick / cone is 200-800 nanometers; the diameter of the stick / cone is 80-160 nanometers; and the taper of the cone is 3-30 degrees. The method comprises the following steps of: performing ion sputtering and gold film deposition on the substrate with a single-layer crystal template at the pressure of 5-10 Pa to obtain a gold film sphere array; putting the gold film sphere array in zinc oxide electrolyte with the temperature of 60-80 DEG C; and performing electrolytic deposition at the deposition current density of between -0.3 mA / cm<2> and -2.0 mA / cm<2> by adopting a three-electrode method for 30 minutes to 4 hours to obtain the zinc oxide micro / nano composite structure array film. The film can be widely applied to the fields of photoelectronic devices, surface microfluids, sensors and the like.
Owner:HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
Static material layer thickness detection device between dielectric balls
ActiveCN103256877BThe experimental data is accurateOptimum Process ParametersMechanical thickness measurementsEngineeringLayer thickness
The invention discloses a detection device of a static material layer thickness between dielectric spheres. The detection device comprises a support, guide rods are respectively fixed at the upper end of the support and the lower end of the support, a moving base is arranged on the guide rods, the moving base can slide along the guide rods in a left-and-right mode, a first ejecting rod is fixedly arranged at one end of the support, a first ruler rod is fixedly arranged on the first ejecting rod, one end of a screw rod is connected with a hand wheel in a rotating mode, the other end of the screw rod is connected with the moving base in a threaded mode, the hand wheel pushes the screw rod to rotate so as to drive the moving base to move along the guide rods in a left-and-right mode, the moving base is connected with one end of a force measuring device, the other end of the force measuring device is connected with a second ejecting rod, a second ruler rod is fixedly arranged on the second ejecting rod, and a V-shaped guide plate is arranged between the two guide rods which are arranged between the first ejecting rod and the second ejecting rod. According to the detection device of the static material layer thickness between the dielectric spheres, the static thickness of the squeezed material layer between the dielectric spheres can be effectively measured through measurement of change of distance between the two ruler rods, and more accurate experiment data can be provided for ball milling process design.
Owner:ZHEJIANG UNIV OF TECH
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