50results about How to "Low magnetic susceptibility" patented technology

A wireless headset capable of receiving audio signals transmitted wirelessly and compatible for use in an MRI scanner is disclosed. The headset includes a first wireless module connected to the first earphone and a second wireless module connected to the second earphone. Each wireless module is electrically connected to a speaker in the respective earphone. The first wireless module receives the audio signal from a remote source and coordinates transmission of the audio signal to each of the speakers. The compact nature of each earphone minimizes the length of wire runs. In addition, the headset is made of materials having low magnetic susceptibility such that they will not be affected by the magnetic field from the MRI scanner.

Disclosed is a device for assisting the function of a heart that is collapsible to facilitate minimally invasive procedures. The cup-shaped device may be inserted into the chest cavity and deployed on the heart via a specially configured tube. The device comprises a cup-shaped shell expanded by a support cage disposed within the shell, and an elastic cup-shaped liner, together forming an inflatable cavity between the outer surface of the liner and the inner surface of the shell. Alternate application of positive and negative pressures to the cavity provides controlled, active, systolic and diastolic support to the heart.

Disclosed is a process, which is used to eliminate heavy metal cations from the aqueous media, and provides a better solution for the existing problems of the separation systems like low efficiency and high costs. The heavy metal cations selected for this purpose are cadmium, lead and copper. The separation system consists of a two stage process: In the first stage, the iron oxide nanoparticles are suspended in an aqueous medium contaminated with the heavy metal cations. In the second stage, the solution is brought into contact with a ferromagnetic matrix (or a paramagnetic matrix) magnetized by the application of an outside magnetic field. The heavy metal cations are deposited on the matrix under the imposed magnetic field. This two-stage process makes it possible to separate the heavy metal cations from the aqueous medium. The wire matrices are upon the completion of separation washed away by water or air current.

The invention discloses a low-elasticity-modulus and high-strength spinodal decomposition type Zr-Nb-Ti alloy material and a preparation method thereof. The Zr-Nb-Ti alloy material comprises the following components in atomic percentage: 20-50% of Ti, 15-45% of Nb and the balance of Zr. The preparation method comprises the following steps: a titanium source, a niobium source and a zirconium sourceare prepared according to designed ratios; zirconium alloy ingots are obtained through multiple times of smelting; zirconium alloy rods are obtained through the zirconium alloy ingots by suction casting; and solid-solution treatment and aging treatment are performed on the zirconium alloy rods in sequence to obtain the Zr-Nb-Ti alloy material. The zirconium alloy material is higher in strength and low in elasticity modulus; the highest strength can reach 1130.8+/-8.5 MPa; and the elasticity modulus is maintained between 40-50 GPa, and is near the elasticity modulus of human bodies.

An apparatus for inductive temperature sensing comprises a coil configuration, a target, and an impedance measurement circuit. The target has a non-zero conductivity and susceptibility and the impedance measurement circuit measures the apparent inductance of the coil configuration at a measurement frequency close to the crossover frequency to provide an indication of temperature of the target.

A hand-operated cleaning device comprises a handle (12) with a grip handle (14) and a securing device (24) which comprises two securing elements (26), and a cleaning head (18) which comprises two attachment elements (28), at least one securing element (26) and the associated attachment element (28) comprising permanent magnets (40, 42) that are embedded in the plastics material. The cleaning head can be a mop cover which comprises a textile element (52) to which attachment elements (28) are secured, at least one of the attachment elements (28) comprising a permanent magnet (42). The flat mop cover has a dimensionally stable design and can be directly coupled to a bar-shaped handle (12). The attachment elements (28) of the mop cover are arranged and designed such as to form a detachable connection with the securing elements (26) of the handle (12).

The invention discloses a non magnetic corrosion-resistant copper alloy material. It is characterized in that the components and their weight proportion are as follows: Ni 0.05-2%, Al 2-15%, Zn 0.5-8%, 5 Sn 1-10%, and the left are Cu. The non magnetic corrosion-resistant copper alloy material is prepared by adding alloy element with suitable amount, and it possesses good corrosion-resitance property, especially in salty water and atmosphere condition, stable diamagnetism, wide application in ship building industry and instrument material.

A method is used for simulating a gravity acting on an object in space. The method comprises inducing a magnetic moment in the object via generation of an external magnetic field in an environment of the object. A device is used for generating a force acting on an object. The device comprises a magnetic device for generating an external magnetic field in an environment of the object and therefore for inducing a magnetic moment in the object. The magnetic device has at least two elements, which can be moved relative to one another for setting the external magnetic field.

The invention relates to a medical degradable Fe-Mg-Ag alloy material and a preparation method thereof. The Fe-Mg-Ag alloy material comprises the following chemical components by weight percentage: 30% of Mn, 1-10% of Ag, and the balance iron. The invention utilizes the characteristic that Fe30Mn alloy can be corroded in the human environment so as to be biodegradable, the positive potential antibacterial element Ag is added into the alloy for smelting in a vacuum arc furnace, and rapid cooling is carried out to obtain the novel degradable iron-based alloy. The alloy has greatly increased degradation rate, is conducive to shortening the degradation time after implantation into the human body and reducing the stimulation of the implant to organisms, and later through release of Ag+, the implant has certain antibacterial properties, thus improving the therapeutic effect of medical devices. The material provided by the invention has good mechanical properties and biocompatibility, and hasmore excellent nuclear magnetic resonance compatibility.

The invention discloses a Zr-Nb-based alloy with good additive manufacturing forming performance and application of the Zr-Nb-based alloy, and belongs to the technical field of metal additive manufacturing. Components of the Zr-Nb-based alloy are from a dual cluster alloy component design model. The expression formula of the alloy element atomic percent (at./%) is Zr75+/-2(Zr, Mo, Sn)3.1+/-0.5(Zr,Ti, Hf, Nb, Ta)21.9+/-1.5, wherein (Zr, Ti, Hf, Nb, Ta) elements are single, or the mixed total quantity is 21.9+/-1.5 at./%, (Zr, Mo, Sn) elements are single, or the mixed total quantity is 3.1+/-0.5 at./%, and the total quantity of the other elements is controlled within 1 at.%. The main alloying element of the alloy is the Nb element; the low-elasticity-modulus Nb element has low magnetic susceptibility; meanwhile, grains of the alloy can be refined; the oxidization resistance of alloy melt and melt stability are improved; liquid-solid phase areas are reduced; flowability is enhanced; andthe alloy has good melt and solid structure compatibility and can be used for additive manufacturing forming.

A method for producing a housing is provided. In a first method step, connecting a material plate, having a main extension plane in each case, of the first, second and third material, respectively, in the first and second connection regions, the first and second connection region extending parallel to the main extension planes of the material plates in each case; in a second connection step, processing the interconnected material plates in order to produce the first, second and third zones of the housing.

The invention provides a low-magnetic-susceptibility beta-type Zr-Nb-Ta series alloy which comprises the following components in percentage by weight: 10% of Nb, 10% to 20% of Ta, and the balance Zr and inevitable impurities, wherein the weight percentage of Zr is higher than 50% and the optimal weight percentage of Ta is 15%. The low-magnetic-susceptibility beta-type Zr-Nb-Ta series alloy is better matched with the elasticity modulus of natural bone and lower in magnetic susceptibility. The invention further provides a preparation method of the low-magnetic-susceptibility beta-type Zr-Nb-Ta series alloy. According to the preparation method, the content of Nb is set as a critical point of the transformation from the alpha phase to the beta phase; on the above basis, Ta is added as an alloying element; accordingly, metastable beta-Zr can be obtained at room temperature; meanwhile, the solution strengthening effect can be achieved; the shaping and processing properties of the low-magnetic-susceptibility beta-type Zr-Nb-Ta series alloy can be prevented from being influenced when the strength of the low-magnetic-susceptibility beta-type Zr-Nb-Ta series alloy is improved; and furthermore, the corrosion resistance of the low-magnetic-susceptibility beta-type Zr-Nb-Ta series alloy can be enhanced.

A Co—Cr—Mo-based alloy includes: 63 mass %≦Co<68 mass %; 15 mass %≦Cr<26 mass %; 10 mass %≦Mo<19 mass %; and the balance of inevitable impurities, wherein the total amount of Cr and Mo is from 32 mass % to 37%. The mass magnetic susceptibility of the alloy is 7×4π·10⁻⁹ m³/kg or less at room temperature, and the Vickers hardness number (Hv) of the alloy is 400 or more.