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PTC thermistor alloy wire with high temperature coefficient of resistance and preparation method thereof

A technology of temperature coefficient of resistance and thermistor, 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: 2017-07-11
JIANGSU HUAXIN ALLOY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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 with high temperature coefficient of resistance and preparation method thereof
  • PTC thermistor alloy wire with high temperature coefficient of resistance and preparation method thereof
  • PTC thermistor alloy wire with high temperature coefficient of resistance 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 PTC thermistor alloy wire of the present embodiment is respectively by weight percentage: 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) is less than or equal to 0.05%, sulfur (S) is less than or equal to 0.01%, phosphorus (P) is less than Equal to 0.001%, the balance is iron (Fe).

[0037] The average temperature coefficient of resistance of the PTC thermistor alloy wire of the present embodiment is 4800×10 at 0° C. to 150° C. -6 / °C; 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 soft alloy wire is greater than 390Mpa.

[0038] Since emerging electrical equipment requires more sensitive temperature control and adjustment of resistance elemen...

Embodiment 2 to Embodiment 6

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

[0057] The chemical composition of the PTC thermistor alloy wire of embodiment 2 to embodiment 6 is shown in Table 3 by weight percentage:

[0058] Table 3 Embodiment 1 to Embodiment 6

[0059]

[0060]

[0061] The alloy wires of Examples 1 to 6 are visually observed: there is no joint, and the surface is smooth, smooth, flat, free of burrs and interlayers, and free of cracks and folds. The surface is bright, and there are always small scratches beyond the size tolerance and oxidized colors that affect the use.

[0062] The wire diameter specifications and tolerances of the PTC thermistor alloy wires in Examples 2 to 6 are the same as those described in Table 1. Similarly, in actual production, alloy wires with other wire diameter specifications can also be produced according to specific usage requirements.

[0063] The elongation of the soft PTC thermistor alloy wires of Examples 2 to 6 are the same as thos...

Embodiment 7

[0075] (The preparation method of embodiment 7, PTC thermistor alloy wire)

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

[0077] 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;

[0078] ②Vacuum melting:

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

[0080] a. The motor power of the frequency conversion unit is 60 kilowatts, the motor is three-phase, the gene...

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Abstract

The invention discloses a PTC thermistor alloy wire with a high resistance temperature coefficient and a preparation method of the PTC thermistor alloy wire. The PTC thermistor alloy wire comprises the following chemical components in percentage by mass: 78%-82% of nickel, 0.28%-0.60% of silicon, 0.30%-0.35% of manganese, 0.02%-0.04% of yttrium, 0.04%-0.06% of misch metal, not more than 0.05% of carbon, not more than 0.01% of sulphur, not more than 0.001% of phosphorus and the balance of iron; the mean resistance temperature coefficient of the alloy wire at 0-150 DEG C is 4800*10<-6> DEG C to 5,000*10<-6> DEG C; and the specific resistance of the alloy wire is (0.17-0.19)+ / -0.02muohm.m. The alloy wire disclosed by the invention is currently needed alloy wire with a relatively high resistance temperature coefficient; and the mean resistance temperature coefficient can be up to 5,000*10<-6> DEG C, and meets relatively sensitive temperature control requirements of emerging electric equipment.

Description

[0001] This application is a divisional application of the invention patent application with the application number 201310031374.5, the application date is January 28, 2013, and the invention name is "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 semiconductor resistor with temperature sensitivity. Once it exceeds a certain temperature (Curie temperature), its resistance value is almost step-by-step leap in height. 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 PTC thermistors. [0005]...

Claims

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Application Information

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