279 results about "Phase stability" patented technology

This invention relates to thermal spray coatings on a metal or non-metal substrate. The thermal spray coating comprises a partially or fully stabilized ceramic coating, e.g., yttria stabilized zirconia coating, and has sufficiently high thermodynamic phase stability to provide corrosion and/or erosion resistance to the substrate. This invention also relates to methods of protecting metal and non-metal substrates by applying the thermal spray coatings. The coatings are useful, for example, in the protection of integrated circuit manufacturing equipment, internal chamber components, and electrostatic chuck manufacture.

Antiperspirant emulsions which exhibit excellent phase stability even in the presence of an effective concentration of antiperspirant salts in solution and which are thickened are obtainable by dispersing a hydratable polymer and particularly an amphoteric or cationic modified starch in an aqueous emulsion forming a viscous emulsion, often at an elevated temperature, subjecting the emulsion to high shear, thereby reducing the droplet size of the dispersed oil phase, bringing the emulsion to below 40° C. and introducing the antiperspirant, preferably in aqueous solution. The viscous emulsion subjected to high shear mixing desirably has a Sheer Stress of 10 to 500 Pa. The resultant emulsions show good phase stability even when they contain aluminium/ zirconium antiperspirant salts that promote instability and even at elevated storage temperatures such as at 50° C.

The present invention integrates the surface plasmon resonance and common-path phase-shift interferometry techniques to develop a microscope for measuring the two-dimensional spatial phase variation caused by biomolecular interactions on a sensing chip without the need for additional labeling. The common-path phase-shift interferometry technique has the advantage of long-term stability, even when subjected to external disturbances. Hence, the developed microscope meets the requirements of the real-time kinetic studies involved in biomolecular interaction analysis. The surface plasmon resonance microscope of the present invention using common-path phase-shift interferometry demonstrates a detection limit of 2×10⁻⁷ refractive index change, a long-term phase stability of 2.5×10⁻⁴π rms over four hours, and a spatial phase resolution of 10⁻³ π with a lateral resolution of 100 μm.

An antenna device comprises a reflecting plate, a top shielding cover arranged on one side of the reflecting plate, a first frequency band feed network, a substrate, a first frequency band radiating face, a first frequency band medium layer, a second frequency band radiating face, a second frequency band medium layer, at least one first frequency band feed probe, a second frequency band feed probe, a second frequency band feed network arranged on the other side of the reflecting plate and a low-noise amplifying circuit. The top shielding cover is fixed on the substrate, the first frequency band radiating face is connected to the first frequency band feed network through the first frequency band feed probe, the second frequency band radiating face is larger than the first frequency band radiating face and positioned on the second frequency band medium layer, the second frequency band radiating face is connected to the second frequency band feed network through a second frequency band feed probe, and the first frequency band feed network and the second frequency band feed network are connected with the low-noise amplifying circuit. The invention further provides a receiving system. By means of the antenna device and the receiving system, mutual interference between all frequency points is avoided, the phase stability of an antenna is improved, and the measuring accuracy is improved.

The invention discloses a microwave optical fiber link device for long-distance transmission of radar reference frequency signals and relates to the technology of radar detection. The microwave optical fiber link device consists of an optical emitter, an optical receiver, a Faraday rotating mirror, an optical circulator, a polarization maintaining optical fiber, a radio-frequency power amplifier and the like. By subjecting microwaves to electric-optical and optical-electric conversion and utilizing the advantages of low insertion loss and high-temperature phase stability of the optical fiber, the microwaves are transmitted in low phase fluctuation and loss in the long distance. The microwave optical fiber link device can be used for transmission of rate-aided signals of spatial long-base line interference synthetic aperture radar (SAR) and transmission of reference frequency signals of radar systems such as phased array radars and multi-base radar monitoring net. Besides, phase changes caused by environmental factors such as temperature and irradiation can be accurately compensated during long-distance transmission of X-wave band microwave signals, and meanwhile, the microwave optical fiber link device has ultrawide radio-frequency (RF) working band and can be developed for transmission of radar reference frequency signals ranging from 50MHz to18GHz.

The invention discloses a natural rubber liquid slurry containing chitosan/sericin and a preparation method thereof, and belongs to the field of high polymer chemistry. The invention is characterized in that the preparation method comprises the following steps: respectively preparing a chitosan water solution and a sericin water solution, mixing the two solution, and regulating the pH value of the mixture to 9-11 by using ammonia water and a citric acid solution; and adding the obtained chitosan/sericin mixed solution to a natural latex slurry, adding a laurate surfactant, and mechanically stirring the mixture uniformly to obtain the natural rubber liquid slurry containing chitosan/sericin. The invention has the advantages that the chitosan has the functions of adsorbing water soluble proteins in the latex, inhibiting bacteria and viruses from breeding, and the like; and the sericin has the functions of oxidation resistance, allergy resistance, hydrophilia, oil resistance and the like, thereby enhancing the emulsion phase stability and the preservation effect of the natural latex. In particular, the product obtained by using the method overcomes the defects of short service life, easy aging and sticking, poor oil resistance, initiation of protein allergy and the like in the traditional natural latex product.

The invention discloses a lithium manganate material for surface treatment and a preparation method thereof. The lithium manganate material for surface treatment takes doped and modified lithium manganate as a basal body, the basal body is coated by a surface treatment material to form a surface coating layer which is a product of the surface treatment material, a product obtained by partially decomposing the surface treatment material, or a product obtained by completely decomposing the surface treatment material, and the concentration of the surface coating layer is in graded distribution namely gradually reducing from outside to inside; and the general formula of the basal body is LixMn2-yMyO4-zXz, wherein x is more than or equal to 0.95 and less than or equal to 1.15, y is more than or equal to 0 and less than or equal to 0.2, z is more than or equal to 0 and less than or equal to 0.4, M is one or more of Li, Cr, Co, Ni, Mg, Ca, Sr, Ba, Na, K, Al, Be, B, Ti, Zr, Cu, Zn, Ga, Sn or V, the doping element X is one or more of F, Cl, Br, I or S, and the surface treatment material is one or more of organic substances containing Ti and/or Al. Through the surface treatment on the doped and modified lithium manganate, the compatibility of the lithium manganate material with an electrolyte is increased, less Mn is dissolved out in the electrolyte, the high-temperature storage performance and high-temperature cycle performance of the lithium manganate material are improved, and the bulk phase stability and the surface stability of the material are improved at the same time.

The invention relates to a method and a system for improving phase stability of a photon microwave signal. The method comprises the following steps that: light output by a laser device is divided into two beams of vertical polarized light by a polarized light beam splitter; a reference light is combined with transmission light via a polarized light beam combiner after frequency-shift, and passes through the polarized light beam splitter after passing through a light micro-wave modulation and a light delay link, finally the reference light is interfered by the transmission light after being rotated and polarized by a faraday rotation mirror, and then a beat frequency signal is detected through a low-speed photodetector; the beat frequency signal is subjected to phase comparison with a 25MHz reference signal to obtain a phase disturbance situation of a transmission system, and the signal output by a phase discriminator is used as a control signal of a microwave photonic phase shifter after being processed. The system comprises a DFB (distributed feedback) laser device, the polarized light beam splitter, an acoustooptic frequency shifter, the polarized light beam combiner, an RF (radio frequency) signal generator, a Mach-Zehnder modulator, the photon microwave signal phase shifter, the polarized light beam splitter, an optical interferometer, a low-frequency optical receiver phase discriminator and a proportion integrator.

Optimized Cu—Mn spinel compositions, with optimal spinel phase formation and phase stability properties, for a plurality of ZPGM catalysts in underfloor and closed-loop coupled catalyst applications are disclosed. Plurality of Cu—Mn spinel compositions are prepared with variations of molar ratios. Effect of calcination temperature is analyzed to determine spinel phase formation and phase stability, as well as the effect of calcination temperature on lattice parameter of spinel, as correlated to spinel phase formation and phase stability of optimal Cu—Mn spinel compositions disclosed. Disclosed Cu—Mn spinels with enhanced spinel phase formation and phase stability may be suitable for ZPGM catalyst systems used in a vast number of TWC applications.

An apparatus containing an integrated optical circuit that enhances phase stability of the injection-locking process of two slave lasers. The integrated optical circuit helps to reduce phase noise by keeping environmental or mechanical perturbations uniform everywhere on that circuit. Also, the integrated optical circuit provides connections for additional components to be coupled, which can monitor and control the performance characteristics of the integrated optical circuit and the injection-locking process.

The present disclosure describes ZPGM material compositions including LaMnO₃ perovskite structure mixed with a plurality of support oxide powders to develop suitable ZPGM catalyst materials. Bulk powder ZPGM catalyst compositions are produced by physically mixing bulk powder LaMnO₃ perovskite with different support oxide powders calcined at about 1000° C. XRD analyses are performed for bulk powder ZPGM catalyst compositions to determine La—Mn perovskite phase formation and phase stability for a plurality of temperatures to about 1000° C. ZPGM catalyst material compositions including La—Mn perovskite structure mixed with doped zirconia, La₂O₃, cordierite, and ceria-zirconia support oxides present phase stability, which can be employed in ZPGM catalysts for a plurality of DOC applications, thereby leading to a more effective utilization of ZPGM catalyst materials with high thermal and chemical stability in DOC products.

The invention relates to a high-gain multilayer dielectric composite dual-circular-polarization micro-strip array antenna, and belongs to the technical field of antennas. The high-gain multilayer dielectric composite dual-circular-polarization micro-strip array antenna comprises nine micro-strip antenna units, two groups of feed networks, a lower-layer dielectric substrate, an upper-layer dielectric substrate, a metal support, dielectric struts and a 90-degree bridge circuit. The high-gain multilayer dielectric composite dual-circular-polarization micro-strip array antenna is based on a micro-strip antenna theory, double layers of the micro-strip antenna units are capable of improving the gain of the antenna by 2dB as compared with the traditional micro-strip antenna units, the two groups of feed networks with equal amplitudes and identical phases are provided with one-dividing-into-two unequal power dividers, one-dividing-into-three equal power dividers and one-dividing-into-six equal power dividers and are reasonably arranged in limited space, and excellent amplitude and phase stability of each feed end is guaranteed; and a left-hand circular polarization mode and a right hand circular polarization mode can be implemented simultaneously, so that right hand circular polarization electromagnetic signals can be transmitted or received while left hand circular polarization electromagnetic signals are transmitted or received.

Systems and methods of self-referenced quantitative phase microscopy (SrQPM). The SrQPM systems and methods provide single-shot, full-field imaging capability for increased imaging speed, and near-common-path geometry for increased phase stability, allowing the study of internal structures of biological cells, live cell dynamics, and the like.

A resin blend composition is provided containing a polyol, an ethoxylate propoxylate surfactant initiated by a short chain compound, and a hydrocarbon blowing agent. The solubility and/or compatibility of the hydrocarbon carbon blowing agent in the polyol is increased and the phase stability of the resin blend composition is improved by the ethoxylate propoxylate surfactant. The resin blend is suitable for reaction with polyfunctional organic isocyanates to make cellular polyurethane and polyisocyanurate foams.

The invention discloses an in-situ synthesis method for preparing a composite thermal barrier coating, which comprises the following steps: mixing R2O3/ZrO2 mixed powder, which is obtained by mixing R2O3 powder and ZrO2 powder and carrying out ball milling, with YSZ powder; and spraying a bonding layer surface on a high-temperature alloy matrix by a plasma spraying method, putting in a resistance furnace, and sintering at 1000-1400 DEG C under air conditions to prepare the R2Zr2O7-dispersed YSZ ceramic layer. The method eliminates the interface between the R2Zr2O7 rare-earth zirconate ceramic layer and the YSZ ceramic layer, so that the thermal barrier coating has high-temperature phase stability, has lower heat conductivity than the traditional YSZ, and lowers the oxygen permeability of the ceramic layer; and compared with the simple rare-earth zirconate ceramic layer, the composite thermal barrier coating has longer service life, and can satisfy the requirements for hot-end component long-term service, high-temperature oxidation resistance and the like.

The invention discloses a CMAS-resisting ceramic layer and a slurry method for preparing the CMAS-resisting ceramic layer, and belongs to the field of thermal barrier coating materials and preparation for the same. The CMAS-resisting ceramic layer is a LaPO4 ceramic layer. The slurry method is used for preparing the LaPO4 ceramic layer on a YSZ ceramic layer, and the wettability of the LaPO4 ceramic layer to molten CMAS is poor; after thermal treatment of 1250 DEG C is carried out, a mutual reaction layer is formed on the interface between the LaPO4 ceramic layer and the CMAS, so that further permeation of the molten CMAS is effectively prevented, and the original phase stability of the YSZ ceramic layer is maintained. Accordingly, the prepared LaPO4 ceramic layer can prevent permeation of the molten CMAS, has superior CMAS corrosion resistance and obviously prolongs the service life of a thermal barrier coating under the CMAS coupling effect.

The present invention details fabrication guidelines of integrated optoelectronic oscillators with frequency and phase stability, having higher frequency selectivity in a relatively small size (compared to the larger size of a higher order electrically realized RF filter), reduced temperature sensitivity, and minimized frequency drift. The integrated photonic components and RF oscillator may use Silicon photonics and microelectronic integration using CMOS and BiCMOS technology, eliminating the need for bulky and/or discrete optical and microwave components.

The invention discloses a time sequence processing method and device for a distributed target InSAR with enhanced space-time coherence. The method comprises the steps of carrying out threshold separation on a permanent scatterer (PS) and a distributed scatterer (DS) on the basis of an obtained single complex image data stack; performing phase stability analysis on separated PS candidate points bymeans of a StaMPS approach to obtain PS points; carrying out covariance matrix estimation on DS candidate points one by one through a maximum likelihood estimator and refining a covariance matrix through a bootstrapped coherence estimator; performing time sequence phase optimization on each DS candidate point; selecting DS points; constructing a two-layer network for the selected PS and DS points;carrying out phase error separation on an unwrapping phase after three-dimensional phase unwrapping is performed on the PS points and the DS points; utilizing the maximum likelihood estimator and a phase model to estimate geophysical parameters. The method can reduce the uncertainty of InSAR time sequence analysis caused by coherence loss and an ill-conditioned matrix, improve the quality controlof time sequence data processing and thus improve the estimation precision and reliability of products.