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Positive temperature coefficient (PTC) thermal resistance alloy wire and preparation method thereof

A thermistor and alloy wire technology, applied in the field of alloy wire, can solve the problems of single variety and no series of products, and achieve the effect of increasing service life and avoiding sulfur corrosion

Active Publication Date: 2015-04-22
JIANGSU HUAXIN ALLOY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to preliminary statistics, at present, only metal PTC thermistor alloy wire has a national demand of nearly 100 tons per year. However, at present, domestic PTC thermistor alloy wire has not formed a series of products, and the variety is single. The temperature coefficient of resistance urgently needed by users is higher than 3000. ×10 -6 / °C not yet

Method used

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  • Positive temperature coefficient (PTC) thermal resistance alloy wire and preparation method thereof
  • Positive temperature coefficient (PTC) thermal resistance alloy wire and preparation method thereof
  • Positive temperature coefficient (PTC) thermal resistance alloy wire and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] (Example 1, PTC thermistor alloy wire)

[0035] The chemical composition of the PTC thermistor alloy wire of the present embodiment is: nickel (Ni) 78.0%, silicon (Si) 0.6%, manganese (Mn) 0.3%, yttrium (Y) 0.02%-0.04% (0.03% in this embodiment), mixed rare earth 0.04% to 0.06% (0.05% in this embodiment), carbon (C) less than or equal to 0.05%, sulfur (S) less than or equal to 0.01%, phosphorus (P) less than or equal to is equal to 0.001%, with the balance being iron (Fe).

[0036] The average temperature coefficient of resistance of the PTC thermistor alloy wire of this embodiment from 0°C to 150°C is 4800×10 -6 / ℃; the accuracy of the temperature coefficient of resistance is ±50×10 -6 / ℃; the resistivity of the alloy wire at 20℃ is (0.19±0.02) μΩ·m. The tensile strength of the soft alloy wire is greater than 390Mpa.

[0037] Since emerging electrical equipment requires more sensitive temperature control and regulation of resistive elements, the upper limit of the ...

Embodiment 2 to Embodiment 6

[0055] (Example 2 to Example 6, PTC thermistor alloy wire)

[0056] The chemical compositions of the PTC thermistor alloy wires of Example 2 to Example 6 are shown in Table 3 by weight percentage:

[0057] Table 3 Example 1 to Example 6

[0058]

Example 1

Example 2

Example 3

Example 4

Example 5

Example 6

Nickel (Ni)

78.0%

82%

64.45%

53%

49%

45%

Silicon (Si)

0.6%

0.28

0.1

0.1

0.25

0.25

Manganese (Mn)

0.3%

0.35

0.22

0.22

0.35

0.35

Yttrium (Y)

0.03%

0.03

0.03

0.03

0.03

0.03

Mixed rare earth

0.05%

0.05

0.05

0.05

0.05

0.05

Aluminum (Al)

--

--

--

--

0.45

0.45

Carbon (C)

≤0.05%

≤0.05%

≤0.05%

≤0.05%

≤0.05%

≤0.05%

Sulfur (S)

≤0.01%

≤0.01%

≤0.01%

≤0.01%

≤0.01%

≤0.01%

Phosphorus (P)

≤0.001%

≤0.00...

Embodiment 7

[0074] (Example 7, the preparation method of PTC thermistor alloy wire)

[0075] The preparation method of the PTC thermistor alloy wire of the present embodiment specifically comprises the following steps:

[0076] ① Preparation of raw materials: Nickel is No. 1 electrolytic nickel Ni-1 whose standard is GB6516; silicon is primary crystalline silicon Si-1 whose standard is GB2881; manganese is electrolytic manganese DJMn99.5 whose standard is GB3418; yttrium is Q The rare earth metal yttrium Y-3 of / HUAC23; the mixed rare earth is the mixed rare earth RECe-45 with the standard of GB / T4153; the iron is the raw material pure iron DT3 with the standard of GB / T9971;

[0077] ②Vacuum melting:

[0078] The equipment used for vacuum smelting is the EG-25 vacuum induction furnace intermediate frequency equipment produced by Shanghai Electric Furnace Factory, of which:

[0079] a. The motor power of the frequency conversion unit is 60 kilowatts, the motor is three-phase, the generat...

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Abstract

The invention discloses a positive temperature coefficient (PTC) thermal resistance alloy wire and a preparation method thereof. The alloy wire comprises the chemical ingredients by weight percent of 45-82.0% of nickel, 0.1-0.6% of silicon, 0.22-0.35% of manganese, 0.02-0.04% of yttrium, 0.04-0.06% of misch metal, 0.05% or less of carbon, 0.01% or less of sulphur, 0.001% or less of phosphorus and the balance of iron. The mean resistance temperature coefficient at 0-150 DEG C is 2500*10(-6) per DEG C to 5000*10(-6) per DEG C by changing the matching content of the components; the PTC thermal resistance alloy wire of which the resistance temperature coefficient which is urgently needed at present and higher than 3000*10(-6) per DEG C is included; the highest mean resistance temperature coefficient can be 5000*10(-6) per DEG C, and the requirements of more sensitive temperature control of novel electrical equipment can be met.

Description

technical field [0001] The invention relates to an alloy wire, in particular to a positive temperature coefficient thermistor alloy wire and a preparation method thereof. Background technique [0002] PTC (Positive Temperature Coefficient, Positive Temperature Coefficient) thermistor is a kind of semiconductor resistor with temperature sensitivity. Once it exceeds a certain temperature (Curie temperature), its resistance value is almost step-by-step with the increase of temperature. Leaping increase. The PTC thermistor can protect the circuit when the current surge is too large and the temperature is too high. [0003] According to different materials, PTC thermistors include ceramic PTC thermistors, organic polymer PTC thermistors and metal PTC thermistors. [0004] Ceramic PTC thermistor material is based on BaTiO 3 or SrTiO 3 or PbTiO 3 The sintered body is the main component, which is doped with a small amount of oxides such as Nb, Ta, Bi, Sb, Y, La and other oxides...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C19/03C22C1/02C22F1/10C21D8/06H01C7/02
CPCY02P10/20
Inventor 袁勤华袁鑫明
Owner JIANGSU HUAXIN ALLOY
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