Alloy for nuclear magnetic resonance spectrometer and preparation method thereof

A nuclear magnetic resonance spectrometer and alloy technology, applied in the field of alloy metals, can solve the problems of low detection sensitivity, and achieve the effects of high sensitivity, high strength and zero magnetic susceptibility

Inactive Publication Date: 2012-09-26
上海寰彤科教设备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, NMR spectrometers use low magnetic susceptibility 7*10 -7 The wire is loosely wound and magnetized to cancel the winding; this method has low probe detection sensitivity

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Embodiment 1: put high-purity silver in proportion in the crucible, the mass percentage is 0.1% silver and 0.05% neodymium, and the rest is copper. at 10 -4 In Pa vacuum, use a tungsten crucible with 400A current to heat to 1350°C, melt and then cool and condense into an ingot; then roll into a thin plate; wire cut into the desired shape; anneal with hydrogen at 815°C; 30 minutes; cooling and quenching in liquid nitrogen; aging at 284°C for 48 hours. Actual measurement results Conductivity 92% ICS (room temperature 25°C) Magnetic susceptibility 6.1*10 -8 (room temperature 25°C).

Embodiment 2

[0012] Embodiment 2: put high-purity silver and 0.01% samarium in proportion to the crucible, and the rest is copper. at 10 -4 In Pa vacuum, use a tungsten crucible with a 400A current to heat to 1360°C, melt it and cool it to condense into an ingot; then roll it into a thin plate; wire cut it into the desired shape; anneal with hydrogen at 817°C; 30 minutes; cooling and quenching in liquid nitrogen; aging at 284°C for 48 hours. Conductivity 95% ICS (room temperature 25 ℃) magnetic susceptibility 8.2*10 -8 (room temperature 25°C).

Embodiment 3

[0013] Embodiment 3: put high-purity silver in proportion to the crucible, the mass percentage is 0.2% silver and 0.05% gadolinium, and the rest is copper. for 10 -4 Heating to 1353°C with a tungsten crucible with 400A current in Pa vacuum, cooling and condensing into an ingot after melting; then rolling into a thin plate; cutting the lower part into the designed shape; annealing with hydrogen at 816°C; 30 minutes; cooling and quenching in liquid nitrogen; aging at 284°C for 48 hours. Conductivity 90% ICS (operating temperature -196°C) magnetic susceptibility 9.5*10 -8 (Working temperature -196°C).

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Abstract

The invention belongs to the technical field of alloy metals and particularly relates to an alloy for nuclear magnetic resonance spectrometer and a preparation method thereof. The alloy disclosed by the invention is Cu-Ag-R copper alloy, wherein the mass percentage content of Ag is 0.07 to 0.2 percent; and the mass percentage content of rare earth R is 0.01 to 0.05 percent. The magnetic susceptibility of the alloy is almost zero (10<-7>), so the alloy is not diamagnetic nor paramagnetic, and the conductivity of the alloy is over 90 percent of that specified by ICS; and according to the shape of the material, thin plates are prepared by a vacuum metallurgical process and the wires are prepared by a vacuum diffusion process. The alloy provided by the invention has high sensitivity, zero magnetic susceptibility, high strength and high conductivity and is very suitable for the nuclear magnetic resonance spectrometer.

Description

technical field [0001] The invention belongs to the technical field of alloy metals, and in particular relates to a special alloy for nuclear magnetic resonance spectrometers and a preparation method thereof. Background technique [0002] NMR spectrometer is an important instrument for chemical structure analysis. It uses the interaction between atomic nuclei and electromagnetic field under a magnetic field to form resonance to obtain chemical structure information. The magnetic field uniformity of the NMR spectrometer must reach 10 -8 and 10 -9 to achieve an instrument resolution of 10 -8 or 10 -9 , the NMR spectrometer detects that the magnetic susceptibility of the probe wire reaches 10 -6 When the level is high, the uniformity of the magnetic field will be severely damaged. At present, NMR spectrometers use low magnetic susceptibility 7*10 -7 The wires are loose wound and magnetized offset wound; this method has low probe detection sensitivity. The invention direc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C9/00C22C1/00
Inventor 谢寰彤胡柱龙胡敏敏
Owner 上海寰彤科教设备有限公司
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