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PTC thermistor alloy wire and preparation method thereof

A thermistor and alloy wire technology, applied in the field of alloy wire, can solve the problems of not forming a series of products and a single variety, and achieve the effect of avoiding sulfur corrosion and increasing service life

Active Publication Date: 2015-05-27
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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  • PTC thermistor alloy wire and preparation method thereof
  • PTC thermistor alloy wire and preparation method thereof
  • PTC thermistor alloy wire and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] (Example 1, PTC thermistor alloy wire)

[0036] The chemical composition of the alloy wire of the PTC thermistor of this embodiment in terms of weight percentages are: nickel (Ni) 78.0%, silicon (Si) 0.6%, manganese (Mn) 0.3%, and 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 Equal to 0.001%, and the balance is iron (Fe).

[0037] 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 resistance temperature coefficient 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.

[0038] Since the emerging electrical equipment requires more sensitive temperature control and adjustment resistance elements, the upper limit ...

Embodiment 2 to Embodiment 6

[0056] (Example 2 to Example 6, PTC thermistor alloy wire)

[0057] The chemical composition of the PTC thermistor alloy wires of Example 2 to Example 6 are shown in Table 3 in terms of weight percentage:

[0058] Table 3 Example 1 to Example 6

[0059]

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％

[0060] Sulfur (S)

≤0.01％

≤0.01％

≤0.01％

≤0.01％

≤0.01％

≤0.01％

Phosphorus (P)

≤0.001％

≤0.001％

≤0.001％

≤0.001％

≤0.001％

≤0.001％

Iron (Fe)

Margin

Margin

Margin

Margin

Margin

Margin

[0061] The alloy wires of Examples 1 to 6 were observed with the naked eye: there was no joint, and the surface was smooth, smooth, and flat, without burrs an...

Embodiment 7

[0075] (Embodiment 7, Preparation method of PTC thermistor alloy wire)

[0076] The preparation method of the PTC thermistor alloy wire of this embodiment specifically includes the following steps:

[0077] ① Preparation of raw materials: Nickel is the standard of GB6516 No. 1 electrolytic nickel Ni-1; silicon is the standard of GB2881 first grade crystalline silicon Si-1; manganese is the standard of GB3418 electrolytic manganese DJMn99.5; yttrium is the standard of Q The rare earth metal Y-3 of / HUAC23; the mischmetal is the mischmetal RECE-45 with the standard of GB / T4153; iron is the raw material pure iron DT3 with the standard of GB / T9971;

[0078] ②Vacuum melting:

[0079] The equipment used for vacuum melting is the EG-25 vacuum induction furnace intermediate frequency machine equipment produced by Shanghai Electric Furnace Factory, of which:

[0080] a. The motor power of the variable frequency unit is 60 kW, the motor is three-phase, the generator voltage is 375 / 750 volts, the...

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Abstract

The invention discloses a PTC thermistor alloy wire and a preparation method thereof. The alloy wire comprises the following chemical components in percentage by weight: 64%-78 % of nickel, 0.1%-0.6% of silicon, 0.22%-0.30 % of manganese, 0.02%-0.04 % of yttrium, 0.04%-0.06 % of mixed rare earth, less than or equal to 0.05 % of carbon, less than or equal to 0.01% of sulfur, less than or equal to 0.001% of phosphorus, and the balance of iron; the average resistance temperature coefficient of the alloy wire at 0 DEG C-150DEG C is 4300*10<-6> / DEG C-4800*10<-6> / DEG C, the resistivity of the alloy wire is (0.19-0.27) + / -0.02mu ohm.m; and the PTC thermistor alloy wire is a PTC thermistor alloy wire with the resistance temperature coefficient of higher than 3000 *10<-6> / DEG C currently needed, thus meeting the requirement on the more sensitive temperature control of new electrical equipment and the like.

Description

[0001] This application is a divisional application of the invention patent application whose application number is 201310031374.5, the filing date is January 28, 2013, and the invention is titled "PTC thermistor alloy wire and its preparation method". Technical field [0002] The invention relates to an alloy wire, in particular to a positive temperature coefficient thermistor alloy wire and a preparation method thereof. Background technique [0003] 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 stepped with the increase of temperature Jumping up. The PTC thermistor can protect the circuit when the current surge is too large and the temperature is too high. [0004] According to different materials, PTC thermistors include ceramic PTC thermistors, organic polymer PTC thermistors and metal P...

Claims

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Application Information

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