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Non-ferrous Metals

Deposition Materials

Rare Earth Elements

Semiconductor Elements

Functional Materials

Titanium Niobium Alloys

Superconducting Materials include Niobium titanium alloy (NbTi) and Niobium tin alloy (Nb3Sn).

NbTi (Niobium titanium alloys) for Accelerator

Item  Performance
Diameter of braided wire  (mm) φ0.810
Length of single wire (m) >10000
Copper ratio 1.56±0.05
Core diameter of NbTi (µm) 22.0
Torque (mm) 25±2.0
Shunt temperature (B=5.65T,I=80A) >6.1K
Critical current (T=4.22K,B=9.5T) >60A
Hysteresis loss per unit volume (4.22K,±3.0T) <400mJ/cm3

NbTi (Niobiu titanium alloys) for MRI (WIC):

Item Performance
Cross-sectional size(mm) 1.1×1.7~2.15×4.25
Cu/NbTi ratio 10-20
Critical current density(A)@4.2 K,5 T >2500
RRR(273K/10K) >80

NbTi (Niobium Titanium Alloys) for ITER:

Item ITER Requirements Performance
Diameter after  nickel plating (mm) 0.730±0.005 0.727-0.732
Length of single wire (m) >1000 Max.>50,000
Diameter of core wire (µm) ≤ 8 ≤ 7.8
Twist pitch (mm) 15±2 13.2-16.8
Thickness  of Ni layer (µm) 2.0+0/-1 1.3-1.6
Copper ratio 2.35±0.1 2.28-2.34
RRR value (273/10 K) > 100 >100
Critical current Ic (A)@4.2 K,5 T >339 >360
n value@4.2 K,5 T >20 >35
Hysteresis loss per unit volume(mJ/cm3)@4.2 K, ±1.5T <45 30-40

NbTi (Niobiu titanium alloys) for MRI (Monolith):

Model No. of NbTi cores Dimensions(mm) Copper  Ratio Ic (A) @ 4.2K, 5T RRR(273K/10K) Tolerance of dimension
Bare wire After painting
F18-10 18 1.70×1.10 1.80×1.20 10 400  >120 ±0.005
F24-7 24 1.70×1.10 1.80×1.20 7 520 >120 ±0.005
F36-4 36 1.70×1.10 1.80×1.20 4 810 >120 ±0.005
F54-2.5 54 φ1.016 φ1.067 2.5 628 >120 ±0.005
F630-1.3 630 1.2×0.75 1.28×0.83 1.3 1000 >120 ±0.005

Niobium tin alloy Nb3Sn for ITER (Bronze process):

Item ITER Requirements Performance
Diameter after  chrome plating (mm) 0.820±0.005 0.818-0.822
Length of single wire (m) >1000 Max.>5000
Twist pitch(mm) 15±2 14.1-16.1
Thickness of chrome layer (µm) 2.0+0/-1 1.40-1.92
Volume ratio in the area of copper and non-copper 1.0±0.1 0.90-1.04
RRR value (273/20 K) > 100 >100
Critical current Ic (A)@4.2 K,12 T >190 225-248
n value@4.2 K,12 T >20 34-44
Hysteresis loss per unit volume (mJ/cm3)@4.2 K, ±3 T <500 380-433

Niobium tin alloy Nb3Sn for ITER (Internal Sn process):

Item ITER Requirements Performance
Diameter after  chrome plating (mm) 0.820±0.005 0.819-0.822
 Length of single wire (m) >1000 Max.>9000
Twist pitch(mm) 15±2 15.62-16.15
 Thickness of chrome layer (µm) 2.0+0/-1 1.34-1.96
Volume ratio in the area of copper and non-copper 1.0±0.1 0.91-1.05
RRR value(273/20 K) > 100 108-238
Critical current Ic (A)@4.2 K,12 T >190 236-260
n value@4.2 K,12 T >20 23.2-34
Hysteresis loss per unit volume (mJ/cm3)@4.2 K, ±3 T <500 370-491

Niobium used in RF Cavity:

Niobium is a very important rare Metal with high melting point. It’s largely applied in the metallurgy, chemistry, aerospace and aviation, nuclear, electronics, superconductor, etc due to its high melting point, flexible plasticity, low vapor pressure, stable chemical properties, etc.. Up to now, Niobium becomes the first candidate for making RF cavity because it has the advantages of superconductivity.

We provide semifinished niobium alloy supercondcting products and customized niobium superconductingparts.



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