236results about How to "High 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.

The invention relates to high-temperature alloy technology, and in particular provides an isometrical cast nickel-base high-temperature alloy with low density, high incipient melting temperature and good casting property and a preparation process thereof, which can be used for floating tile materials of a combustion chamber. The alloy comprises the following compositions by mass percentage: 0.03 to 0.06 percent of C, 5 to 12 percent of Cr, 5.5 to 6.5 percent of Al, 3 to 8 percent of Co, 3 to 7 percent of W, 2 to 4 percent of Mo, 1.6 to 3.2 percent of Nb, 0.01 to 0.03 percent of B, 0.008 to 0.025 percent of Y and the balance of Ni. A vacuum induction furnace is adopted to smelt a master alloy, and a smelting crucible is a CaO crucible or a MgO crucible; and the operation process comprises the following steps: putting alloying elements such as carbon, chromium, cobalt, tungsten, molybdenum and niobium in proportion and a nickel plate into the crucible; melting the alloy when the vacuum degree reaches between 50 and 0.1 Pa; and after completion of the melting, refining for 30 to 300 seconds at a temperature of between 1,550 and 1,600 DEG C, cutting off electricity, forming a film, breaking the film to add Al and Al-Y and Ni-B interalloy for uniform stirring, and casting a master alloy pig at a temperature of between 1,450 and 1,500 DEG C. The invention solves the problems of low incipient melting temperature, poor plasticity and inoxidability and the like of the nickel-base high-temperature alloy.

The invention provides an on-chip antenna electrical property test system. A millimeter wave test system comprises a vector network analyzer, a millimeter wave controller, a triplexer, a millimeter wave receiving module, and an S parameter test module, and realizes signal generation and receiving measurement. A millimeter wave probe is in connection with the output port of the S parameter test module through a waveguide tube; a probe bench system and a microscope system are in mutual cooperation to realize reliable contact between a probe contact and an on-chip antenna feeding point; a three-shaft rotary table system comprises a lower orientation rotary table, a first L-shaped cantilever, a second L-shaped cantilever, a pitching rotary table, an upper orientation rotary table and a rotary table controller; the millimeter wave receiving module is installed above the three-shaft rotary table system; the input port of the millimeter wave receiving module is provided with a horn receiving antenna which aligns the on-chip antenna at the centre of sphere; a master control computer controls a whole system. The on-chip antenna electrical property test system can accurately measure the standing-wave ratio, directional diagram characteristics and gains of an on-chip antenna.

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.

An O2-bearing low-Ce RE material with high performance and multiple purposes is a composite oxide consisting of cerium oxide, zirconium oxide and assistant chosen from lanthanum oxide, strontium oxide and yttrium oxide. It is prepared through codeposition and calcining at 500-600 deg.C. It can be used as the carrier and assistant of the catalyst for cleaning the tail gas of car.

The invention relates to a digital beam tracking method for a molecular matrix of a satellite mobile communication phased-array antenna. The digital beam tracking method is characterized by comprising the following steps: dividing a phased array into 4 quadrants, namely the first quadrant, the second quadrant, the third quadrant and the fourth quadrant, according to the rectangular coordinate system, wherein the beam direction of each unit in each quadrant is controlled by united phased control logic; each quadrant comprises a power combiner (1), power dividers (2) and a tracking and receiving module (3); signals of the 4 quadrants share a tracking signal processing module (6) and a power combiner (4); power synthesis is independently carried out to the signal of each quadrant by the respective sub-array power combiner (1) to form the power-synthesized signal; then each quadrant respectively divides the power-synthesized signal into two signals by the power divider (2) of each quadrant. The digital beam tracking method can stably and reliably track the satellite under high-speed movement shaking conditions of a carrier.

The invention provides a method for providing a stable liquid cleanser compositions which can use fatty acyl isethionates mixtures, regardless of free fatty acid contact of isethionates mixture or chain length distribution of isethionates mixture. The key is to insure a specific combination of liquid crystal inducer (of surfactant phase) and of modifier (to ensure large size domain providing stability) so that the isethionates will be stable at low and high temperatures.

Described is a method for the production of metal oxides, in particular mixed metal oxides such as ceria/zirconia, and metal oxides obtainable by said method. Due to high enthalpy solvents with a high carboxylic acid content said metal oxides have improved properties. For example ceria/zirconia has excellent oxygen storage capacity at high zirconium levels up to more than 80% of whole metal content.

The invention relates to a fatigue multi-point wireless monitoring system of a marine riser. The system is composed of a parameter monitoring part, an information transmitting part and an information receiving part; the parameter monitoring part is composed of a plurality of sensors, is distributed at a plurality of monitoring points under the sea level along the marine riser and used for collecting the accelerated speed, strain and dip angle of the marine riser and ocean flow speed; and the information receiving part comprises an underwater sound transmitting transducer, a vertical underwater sound channel and an underwater receiving transducer; the information receiving part comprises a preposed analog amplification circuit board and an analog band pass filter with automatic gain control, wherein the preposed analog amplification circuit board comprises a triode amplification and operation amplification circuit, and the analog band pass filter comprises automatic gain control, band pass insulation and a postposed amplification circuit. According to the invention, a plurality of sensor groups are arranged along the marine riser, the multi-point real-time wireless fatigue monitoring performance can be realized, simultaneously the seal level information receiving part also can remotely control the underwater monitoring part, control the collecting time, sampling frequency and the like to reduce the energy consumption of the underwater part.

Disclosed is an optical sensing device including a source unit providing a beam of light with continuously modulated phase retardation between p- and s-polarization components of the light by employing a LCM; a reference unit receiving a first part of the light to provide a reference signal; a SPR sensing unit receiving a second part of the light to induce a phase retardation change between the p- and s-polarization components due to SPR associated with a sample; a probe unit receiving the light after SPR to provide a probe signal; and a detection unit connected to the reference unit and the probe unit to detect characteristics of the sample by comparing the reference signal with the probe signal. By using active phase modulation technologies and differential phase measurement, it is possible to fulfill chemical and biological detection.

A tooth whitener is provided, including a water-in-oil (W/O) emulsion phase including: a discontinuous phase comprising a peroxide, a hydrophilic solvent, and a polyol, and a continuous phase comprising a glycerol monooleate, a polymer and a polyol, wherein the tooth whitener is flowable upon being applied to teeth and is solidified by the action of moisture after being applied to teeth, and then is adhered and fixed to teeth, and wherein the glycerol monooleate is in an amount of 15% to 95% by weight, based on total weight of the tooth whitener composition.

The invention discloses a Hf (Ta) C ultra-high-temperature composite coating, which consists of HFC with HfTaC2, wherein the molar fraction of HfTaC2 is 6-50 percent, and the HfTaC2 is distributed in the coating uniformly or in a gradient way. The preparation method comprises the steps of: placing a surface-treated substrate material into a low-voltage chemical vapor deposition furnace, and usingmixed powder of hafnium tetrachloride and tantalum pentachloride as a hafnium source and a tantalum source, methane as a carbon source, argon as a diluent gas and hydrogen as a reducing gas; and delivering the mixed powder into a reactor of the deposition furnace, and preparing the Hf (Ta) C ultra-high-temperature composite coating by surface deposition on the substrate material. Limitations of asingle coating in ablation can be overcome, advantages of all phases of the coating can be fully utilized, and requirements for long-time high-temperature protection of the substrate material can be satisfied. The process is simple and convenient to operate, the prepared coating is well combined with the substrate, no interlayer cracks or penetrating cracks can be produced, and the thermal shock resistance and ablation resistance are excellent. The Hf (Ta) C ultra-high-temperature composite coating is suitable for surface coating and high-temperature protection of carbon/carbon composite materials, carbon/ceramic composite materials, graphite, carbide ceramics and other materials.

The invention discloses a stable phase center measurement antenna which is mainly used in the fields of geodesy and relevant subjects including marine geodesy, geophysical exploration, resource exploration, engineering surveying, engineering deformation, spacecraft docking and the like. The antenna comprises a metal base of the antenna and wave-absorbing material arranged on the upper surface of the outer edge of the metal base. The center part of the metal base is a round cavity, and a circuit board protection cover, a multi-feed slot antenna array, a supporting medium, annular wave-absorbing material in the cavity, a coaxial feed antenna and a radio frequency connector are installed in the cavity from top to bottom. Two round groove choking coils are contained between the round cavity and the outer edge of the base. The multi-feed point, wave-absorbing material and coking coil technologies are comprehensively adopted for the stable phase center measurement antenna, and thus the stable phase center measurement antenna has the advantages of being low in wide angle polarization axis ratio and high in phase center stability and can be used for various kinds of precision measurement for satellite navigation.

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.

An optical device comprising a photorefractive composition configured to be photorefractive upon irradiation by a blue laser. The photorefractive composition comprises a polymer comprising a repeating unit including at least a moiety selected from the group consisting of the formulas (Ia), (Ib) and (Ic), as defined herein.

A receiving system (11) for connection to an antenna arrangement (19) for detecting response signals from a substance having quadrupolar nuclei excited so as to produce nuclear quadrupole resonance in certain of the quadrupolar nuclei. A method for receiving a response signal via the antennae arrangement (19) is also described. The receiving system (11) includes an amplifier (17) to amplify the received response signal from the antenna arrangement (19) for subsequent processing, a matching section (15) to match the amplifier (17) to the antenna (19), and an isolating switch (13) to isolate the antenna from the receiving system (11). The matching section (15) noise matches the receiving system (11) to the antenna (19) during a receiving period to reduce the Q factor of the antenna without significantly degrading the signal to noise ratio. The isolating switch (13) isolates the receiving system (11) from the antenna (19) during a transmitting period when an excitation signal is transmitted by the antenna (19) to irradiate the substance. It also electrically connects the receiving system (11) to the antenna during the receiving period immediately after the transmitting period.

The invention discloses a phase-multiplexing-based full-range sweep frequency OCT (Optical Coherence Tomography) imaging method and system. An electrooptical modulator is arranged in a reference arm of the sweep frequency OCT system so as to realize high-speed phase modulation of an interference spectrum. Preset phase change can be kept between adjacent sampling points of the collected interference spectrum through trigger synchronization between a data collecting card and the electrooptical modulator so as to realize collection on phase multiplexing of the interference spectrum in a single sweep frequency period, the data sampling points of the collected interference spectrum are grouped according to corresponding additional phases, the grouped sampling points are respectively mapped in a wave number space with sampling points at equal intervals so as to form phase shift interference spectrum data subsets of the wave number space. Interference spectrum data can be constructed by utilizing the phase shift interference spectrum subsets so as to reconstruct full-range sweep frequency OCT images. On the basis of phase modulation and multiplexing of the interference spectrum in the single sweep frequency period of the electrooptical modulation, the phase shift is fast in speed and high in precision, the image rejection rate is high, and high-sensitivity imaging in an interesting depth area can be realized.

An optical transmission system includes: a two-lightwave generator for generating optical signals having wavelengths λ1 and λ2 from laser light; a photodetector for detecting a microwave signal M12 from two optical signals distributed by an optical coupler; an optical modulator for frequency-shifting the two optical signals; a Faraday reflector for reflecting the two optical signals; an optical coupler for mixing the two optical signals that have been reflected by the Faraday reflector, frequency-shifted again, transmitted by an optical fiber, and guided by a polarization beam splitter, with two optical signals distributed by an optical coupler; an optical demultiplexer for wavelength-dividing four mixed optical signals into optical signals having the wavelengths λ1 and λ2; photodetectors for detecting respective beat signals of the wavelength-divided optical signals having λ1 and λ2; and a phase difference detector for detecting a phase difference between the beat signals of the optical signals having λ1 and λ2.