12results about How to "High emission intensity" patented technology

The invention belongs to the technical field of luminescent materials, and particularly relates to a luminescent material, an anti-counterfeiting optical thin film and a preparation method thereof. The chemical general formula of the luminescent material is SrGa < 12-x > Mn < x > O < 19 > / Ga < 2 > O < 3 >, and x is equal to 0.025 to 0.035. The preparation method of the anti-counterfeiting optical thin film comprises the following steps: uniformly mixing a luminescent material, a PDMS polymer and a curing agent to obtain colloid, and curing to obtain the optical thin film, the mass ratio of the luminescent material to the PDMS polymer is 1: (0.65-1.5), and the mass ratio of the PDMS polymer to the curing agent is (9-10): 1. The invention overcomes the defects that inorganic fluorescent powder in the prior art only has one light-emitting mode of photoluminescence, is poor in anti-counterfeiting effect and is easy to counterfeit.

The invention is applicable to the technical field of perovskite luminescent materials, and provides a one-dimensional perovskite method luminescent material which is a one-dimensional zigzag edge shared perovskite luminescent material and has a colorless transparent single crystal structure, and a preparation method comprises the following steps: dissolving PbX2 in an HX solution, and heating and stirring a flask in an oil bath until a solid is completely dissolved; neutralizing 4-(aminomethyl)-pyridine with an HX solution, adding the neutralized 4-(aminomethyl)-pyridine into the PbX2 solution, and stirring; and naturally cooling the solution, and drying without stirring. The invention further provides a one-dimensional perovskite method luminescent material luminescent color gamut tuning method. The invention also provides a multi-color-gamut-covered perovskite luminescent material and an application of the multi-color-gamut-covered perovskite luminescent material in preparation of photoelectric devices. The material is easy to prepare, emission covers a wide color gamut at normal temperature and normal pressure, the photoelectric characteristic of the material can be adjusted through high-pressure treatment, and the adjustability of the emission color and the emission intensity of the perovskite material under high pressure are remarkably enhanced.

The invention relates to the technical field of semiconductor technologies, in particular to an ultrasonic sensor based on an organic polymer structure and a preparation method thereof.The ultrasonic sensor comprises a substrate, a piezoelectric layer is formed on the front face of the substrate, a back cavity is formed in the substrate in a penetrating mode, an organic polymer layer is formed on the surface of the piezoelectric layer, and the Young modulus of the organic polymer layer is not higher than 2 GPa; a groove is formed in the organic polymer layer to form a horn for determining a sound wave field of view. The preparation method comprises the following steps: growing a piezoelectric layer on the front surface of a substrate; etching the piezoelectric layer; growing an organic polymer layer; etching the organic polymer layer and forming a horn; a back cavity is formed through the etching substrate. According to the invention, the organic polymer layer is grown on the piezoelectric layer, the resonant frequency is effectively reduced, on the basis, the organic polymer layer forms a horn capable of limiting a sound wave field of view, the equipment consistency is improved, the horn is formed while the organic polymer layer is etched, the sound pressure level of the horn is improved, process steps do not need to be added, and the yield is improved.

The invention discloses an antibacterial packaging material as well as a preparation method and application thereof. The antibacterial packaging material is prepared from pineapple leaf fiber carboxymethyl cellulose, carboxymethyl cellulose, cationic starch, 3-hydroxyl octoate, alpha-tocopherol, dimethylbiguanide hydrochloride, a plasticizer, nitrogen-doped carbon quantum dots, plant essential oil, nano zeolite powder, carvacrol and citric acid. The preparation method comprises the following steps: dispersing the cationic starch in the deionized water, dispersing the pineapple leaf fiber carboxymethyl cellulose and carboxymethyl cellulose in the deionized water, completely dissolving, adding into a starch solution, sequentially adding the rest components, uniformly mixing, heating, reacting, forming a film, and drying to obtain the packaging material. According to the antibacterial packaging material, the cationic starch, the carbon quantum dots, the plant essential oil and other related components are combined for the first time to form a novel antibacterial packaging material, the antibacterial performance is remarkably improved and kept for a long time through the synergistic effect of all the components, and the antibacterial packaging material is high in material stability, simple and convenient in preparation process, low in cost and high in application and popularization value.

The present invention provides a cation-doped lanthanide MOF material and a preparation method and application thereof, which belongs to the technical field of metal organic framework. The preparation method comprises: 3+ , Yb 3+ and Sr 2+ The hexahydrate salt of the metal ion and 0.42 g of BTC were added to a 100 mL beaker, and 80 mL of DMF and 40 mL of deionized water were added. After ultrasonic treatment for 60 min, a mixed solution was obtained. The mixed solution was transferred to a 200 ml sealed container and stirred at room temperature for 2 h, then transferred to a polytetrafluoroethylene-lined autoclave, the autoclave was sealed, and gradually heated to 140 °C at a rate of 5 °C / min, and kept in an oven at 140 °C for 8 h. After the heating was completed, the mixture was allowed to cool naturally to room temperature. The obtained product was separated by centrifugation and washed three times with DMF and ethanol respectively. The obtained product was placed in a vacuum oven and dried at 100 °C to obtain lanthanide Tb 0.05 Yb 0.95‑y Sr y ‑BTC MOFs. The lanthanide MOF material prepared by the present invention has improved emission intensity and can be applied to sensing, fingerprint recognition, photon barcodes, and anti-counterfeiting, and has great potential.

An ultrasonic detection device for insulating rods for live working relates to an ultrasonic detection device. At present, for the water immersion ultrasonic detection of insulating rods, the required water immersion device is large and only suitable for laboratory detection, and is not suitable for making a portable device. The present invention includes a detection head and a detection instrument connected to the detection head, the detection head includes a wedge block, a transmitting probe and a receiving probe arranged on the wedge block; a sound insulation layer is arranged on the wedge block between the transmitting probe and the receiving probe; the bottom surface of the wedge block is provided with an inner concave arc surface matching the insulating rod, and the top surface of the wedge block is provided with a transmitting probe and a receiving probe; the transmitting probe and the receiving probe face the inner concave arc surface, and there is an angle between the transmitting probe and the receiving probe; the transmitting probe and the receiving probe are connected to the ultrasonic detector through a probe line. The technical solution has a simple structure, is light, easy to carry, and easy to operate, and can conveniently and effectively realize the internal wound detection of the insulating rod.

The application provides a terahertz emitter film structure based on a Ni / Cr / Ti metal heterostructure and an ion irradiation enhancement method thereof, a substrate material is glass, and a ferromagnetic layer of a Ni film, an intermediate functional layer of a Cr film and a protective layer of a Ti film are sequentially deposited on the surface of the substrate material. The ion irradiation enhancement method comprises the following steps: a ferromagnetic layer of a Ni film, an intermediate functional layer of a Cr film and a protective layer of a Ti film are sequentially deposited on the surface of the substrate material by adopting a magnetron sputtering deposition method, and an intermediate product on which the three metal film layers are deposited is subjected to ion irradiation. The beneficial effects are as follows: the Cr film layer is used to realize ultrafast current transients under femtosecond laser excitation and generate terahertz radiation. The metal film is subjected to ion irradiation treatment, and the terahertz emission intensity is significantly improved.

The invention discloses an antimonate near-infrared luminescent material and a preparation method thereof. The chemical expression of the luminescent material is YGd (Sc1-x-yGay) SbO7: xCr < 3 + >, in the formula, x is equal to 0.003-0.1, and y is equal to 0-0.97. The preparation method comprises the following steps: weighing the corresponding raw materials of yttrium oxide, gadolinium oxide, scandium oxide, gallium oxide, antimony oxide and chromium oxide according to the stoichiometric ratio of the chemical formula, then grinding and uniformly mixing the raw materials to obtain a mixture, putting the mixture into a crucible, sintering for 2-7 hours in a high-temperature furnace in an air atmosphere at 1100-1300 DEG C, and cooling to room temperature to obtain the yttrium oxide-gadolinium oxide-scandium oxide-gallium oxide-antimony oxide composite material. And cooling to room temperature to obtain the antimonate near-infrared luminescent material. The obtained antimonate near-infrared luminescent material emits near-infrared light under the excitation of a blue light chip, and the emission peak value is near 760 nm. The luminescent material is good in dispersity, uniform in granularity, good in chemical stability and high in luminous efficiency, an excitation band of the luminescent material covers purple and blue light regions, and the luminescent material can be used as a near-infrared luminescent material for a blue light LED.

The invention discloses a biological optical temperature sensor and a preparation method and application thereof, and belongs to the technical field of advanced nonferrous metal materials. The composite nanoprobe comprises a gold nanorod and rare earth doped nanoparticles, mesoporous silica coats the two ends of the gold nanorod, the rare earth doped nanoparticles are loaded on the surface and in holes of the mesoporous silica, and the composite nanoprobe is of a dumbbell-shaped structure; the rare earth doped nano-particles are Gd2O3 nano-particles doped with Yb < 3 + >, Er < 3 + > and Ho < 3 + > metal ions. According to the composite nanoprobe disclosed by the invention, through a specific dumbbell-shaped structure, the luminescence of the rare earth doped nanoparticles loaded at the two ends of the gold nanorod in a near-infrared second region is enhanced by utilizing a dumbbell-shaped surface local electric field generated by the gold nanorod, and the emission intensity is enhanced. The composite nanoprobe provided by the invention can be used for preparing a biological optical temperature sensor.

The invention discloses a personnel positioning device based on the Internet of Things technology, and relates to the technical field of positioning devices.The personnel positioning device based on the Internet of Things technology comprises a waistband and a positioning box and further comprises an easy-to-disassemble device, an anti-collision device and a signal amplification device.The inner wall of the positioning box is fixedly provided with a plate door; a GPS positioning mechanism is fixedly installed at the top of the inner wall of the positioning box, the easy-to-disassemble device comprises a clamping plate, a bottom plate, a telescopic pressing plate, a touch plate, an alarm mechanism and a sliding rod, the bottom plate is fixedly installed at the bottom of the inner wall of the positioning box, and according to the personnel positioning device based on the Internet of Things technology, when the touch plate moves to a certain distance and makes contact with the sliding rod, the sliding rod is fixed to the bottom of the positioning box; the sliding rod impacts the first switch under the action of the touch plate, the positioning box can be conveniently and rapidly installed, errors possibly caused by workers in the installation process are reduced, and when the positioning box is forcibly pulled, the system can rapidly give an alarm, and timely rescue is facilitated.

The present invention belongs to the field of rare earth (RE) down-conversion fluorescence temperature measurement sensor applied to biological windows, and is a fluorescence temperature measurement material applied to biological windows and a preparation method thereof. Yb2O3, Tm2O3, and RE2O3 powders are weighed in molar ratio, wherein RE is Ho or Er, and are respectively mixed with analytically pure HNO3 solution to prepare Yb(NO3)3, Tm(NO3) 3、 RE(NO3)3 solution. The above solution is dripped into CaCO3 and In(NO3)3·4.5H2O and mixed in a beaker with stirring, and the complex citric acid is added. The liquid is dried and evaporated to obtain a yellow dry gel, and alcohol is added to an agate mortar and ground for 1 hour. The ground powder is transferred to a ceramic crucible and placed in a high-temperature box-type electric furnace for calcination in two temperature stages. The CaIn2O4-doped fluorescent powder prepared by the present invention has thermal enhancement characteristics. The present invention belongs to the technical field of rare earth fluorescent temperature measurement sensors. The results show that the present invention is a highly sensitive optical temperature measurement material, which can be used as a fluorescent temperature probe material for biological windows.

The invention discloses a high-penetrability ray detection material and a preparation method thereof, and belongs to the technical field of preparation of high-penetrability ray detection materials. On the basis of the Ce: YAG transparent scintillation ceramic, Ce < 3 + >, Mn < 2 + >, Cr < 3 + > and Si < 4 + > are co-doped, and all the elements act synergistically to co-improve the optical performance of Ce: YAG; wherein Mn < 2 + > and other components act to cause non-radiative energy transfer of Ce < 3 + >, increase of emission intensity, broadening of an emission peak and gradual movement to infrared light; co-doping of Cr < 3 + > and Ce < 3 + > can improve scintillation performances such as light output and light absorption intensity; si < 4 + > doping can improve the uniformity of the microstructure, improve the optical transparency and achieve the purpose of improving the luminescence property and the detection effect of the transparent scintillation ceramic.