CN1610017A - Multilayer sheet type negative temperature coefficient thermosensitive resistor and producing method thereof - Google Patents
Multilayer sheet type negative temperature coefficient thermosensitive resistor and producing method thereof Download PDFInfo
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- CN1610017A CN1610017A CN 200310108069 CN200310108069A CN1610017A CN 1610017 A CN1610017 A CN 1610017A CN 200310108069 CN200310108069 CN 200310108069 CN 200310108069 A CN200310108069 A CN 200310108069A CN 1610017 A CN1610017 A CN 1610017A
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Abstract
The present invention relates to the multi-layer chip thermistor with negative temperature coefficient and its making process. The thermistor is made with nickel nitrate, manganese acetate, cobalt acetate, magnesium nitrate, chromium nitrate and citric acid, and the making process includes composing fine thermosensitive powder via superfine powder process, flow casting, sintering and coating metal electrodes. The made multi-layer chip thermistor with negative temperature coefficient has small size, high precision, material constant B of 3500-4500 K and resistance of 220 ohm-470 kilo-ohm at 25 deg.c.
Description
Technical field
The present invention relates to a kind of multilayer sheet type negative tempperature coefficient thermistor and manufacture method thereof.
Background technology
At present; negative temperature coefficient (NTC) thermistor is widely used in occasions such as temperature control, temperature detection, temperature-compensating, protection using integrated circuit, and wherein chip NTC thermistor can be used for temperature control, temperature detection, temperature-compensating, the protection using integrated circuit in fields such as telecommunications, household electrical appliance, automobile and medical treatment.In recent years because these fields developing rapidly of mobile communication and automobile industry particularly, to being used for these industries particularly as the phenomenal growth that requires of the chip NTC thermistor on the temperature compensating crystal oscillator, and because the production of chip NTC thermistor, especially wherein the production of multilayer sheet type NTC thermistor, required input is excessive but also have the restriction of many technical matters factors, the performance of chip NTC thermistor, big as volume, precision is lower, can not satisfy these requirements.
Summary of the invention
The objective of the invention is to overcome above-mentioned the deficiencies in the prior art, a kind of volume is little, precision is high multilayer sheet type negative tempperature coefficient thermistor and manufacture method thereof are provided.
For achieving the above object, the present invention adopts ultra-fine powder technology to synthesize NTC temperature-sensitive fine powder, and adopts casting technique (strip cast), sintering process and plating electrode process technology to obtain multi-disc layer negative tempperature coefficient thermistor.This multilayer sheet type negative tempperature coefficient thermistor, be characterized in forming with nickel nitrate, manganese acetate, cobalt acetate, magnesium nitrate, aluminum nitrate, chromic nitrate, citric acid (analyzing pure AR) raw material, each metal element content is respectively in the described thermistor: nickel 0-40mol%, manganese 5-70mol%, cobalt 0-50mol%, magnesium 0-10mol%, aluminium 0-10mol%, chromium 0-5mol%.
The manufacture method of described multilayer sheet type negative tempperature coefficient thermistor is characterized in may further comprise the steps:
1., by stoichiometric proportion weighing nickel nitrate, manganese acetate, cobalt acetate, magnesium nitrate, aluminum nitrate, chromic nitrate, use deionized water dissolving, make solution A;
2., the citric acid of weighing equimolar amounts, use deionized water dissolving, make solution B;
3., prepared A solution is joined in the B solution and to stir 30-60 minute, regulate pH value to 5-7 with ammoniacal liquor, dehydration obtains xerogel under 60 ℃-90 ℃, obtain buff powder under 180 ℃-220 ℃, ground 30-60 minute, place 600 ℃-900 ℃ of box type furnaces thermal decomposition 2-6 hour, and obtained the negative temperature coefficient heat-sensitive fine powder of black;
4., the curtain coating agent that is complementary of employing and gained temperature-sensitive fine powder material, press powder: curtain coating agent weight ratio: 50-70: 50-30, with gained temperature-sensitive fine powder and curtain coating agent in the agate jar ground and mixed 24-80 hour, obtain negative temperature coefficient heat-sensitive curtain coating oar material;
5., with gained negative temperature coefficient heat-sensitive curtain coating oar material film forming on curtain coating strip casting machine, wherein the individual layer diaphragm thickness is 20um ± 2um, multilayer diaphragm thickness 500um ± 20um, lamination, hot pressing, line cutting, high temperature row glue, put into sintering furnace and carry out high temperature sintering, sintering temperature is 1000 ℃-1300 ℃, and sintering time is 1-8 hour;
6., gained negative temperature coefficient heat-sensitive sintered body prepared external electrode after, carry out three layers of plating, promptly obtained finished product in 1000 hours through 125 ℃ of heat ageings.
In the manufacture method of described multilayer sheet type negative tempperature coefficient thermistor gained negative temperature coefficient heat-sensitive sintered body being prepared external electrode is that the negative temperature coefficient heat-sensitive sintered body is carried out chamfering at edging machine, and in its termination coated machine coating external electrode, burning infiltration electrode in tunnel kiln.
The manufacture method of described multilayer sheet type negative tempperature coefficient thermistor, it is characterized in that in the described step 5 gained negative temperature coefficient heat-sensitive curtain coating oar material after film forming on the curtain coating strip casting machine, first electrode lamination again in press printing, the interior electrode of printing is a base-metal inner-electrode.
The present invention adopts ultra-fine powder technology to synthesize NTC temperature-sensitive fine powder, and adopting casting technique (strip cast), sintering process and plating electrode process technology to obtain multi-disc layer negative tempperature coefficient thermistor, gained multi-disc layer negative tempperature coefficient thermistor volume is little: its component size is 1.0mm * 0.5mm * 0.5mm; The precision height, its material constant B value is 3500～4500K, B value permissible variation: ± 1%.The resistance value R of this multi-disc layer negative tempperature coefficient thermistor
25 ℃=220 Ω～470K Ω, adjustable.
The present invention is further illustrated below in conjunction with embodiment.
Embodiment
Embodiments of the invention 1:(content is unit with the molar percentage)
Multilayer sheet type negative temperature coefficient (NTC) thermistor is a raw material with nickel nitrate, manganese acetate, cobalt acetate, chromic nitrate, citric acid (analyzing pure AR); Wherein metal element content is: nickel 40mol%, manganese 5mol%, cobalt 50mol%, chromium 5mol%.
By stoichiometric proportion weighing nickel nitrate, manganese acetate, cobalt acetate, chromic nitrate, use deionized water dissolving, obtain solution A; The citric acid of weighing equimolar amounts is used deionized water dissolving, obtains solution B; Prepared A solution joined in the B solution stirred 60 minutes, regulate pH value to 5 with ammoniacal liquor, 80 ℃ down dehydration obtain xerogel, obtain buff powder under 200 ℃, ground 60 minutes, and placed 600 ℃ of thermal decompositions of box type furnace 6 hours, obtain NTC temperature-sensitive fine powder material.
Adopt the curtain coating agent that is complementary with gained NTC temperature-sensitive fine powder material, press powder: curtain coating agent=60: 40 (weight ratio) obtains NTC temperature-sensitive curtain coating oar material with NTC temperature-sensitive fine powder and curtain coating agent ground and mixed 24 hours in the agate jar; With NTC temperature-sensitive curtain coating oar material film forming on curtain coating strip casting machine, wherein the individual layer diaphragm thickness is 20um ± 2um, and multilayer diaphragm thickness 500um ± 20um adopts base-metal inner-electrode, electrode in press printing, lamination carries out hot pressing with hot press, and precision gas cutting machine carries out the line cutting, (500 ℃) are arranged sticking in the high temperature drying case, put into sintering furnace and carry out high temperature sintering, sintering temperature is 1000 ℃, sintering time 8 hours; NTC temperature-sensitive sintered body is carried out chamfering at edging machine, and in its termination coated machine coating external electrode, burning infiltration electrode in tunnel kiln, carry out three layers of plating then, through 125C heat ageing 1000 hours, carry out performance parameter test, the screening finished product, obtaining component size is the multilayer sheet type NTC thermistor element of 1.0mm * 0.5mm * 0.5mm (0402).The NTC thermistor of this sandwich construction made has high accuracy material constant B=3500, B value permissible variation: ± 1%.Resistance value R
25 ℃=220 Ω.
Embodiment 2:(content is unit with the molar percentage)
Multilayer sheet type negative temperature coefficient (NTC) thermistor is a raw material with nickel nitrate, manganese acetate, magnesium nitrate, citric acid (analyzing pure AR); Wherein metal element content is: nickel 20mol%, manganese 70mol%, magnesium 10mol%.
By stoichiometric proportion weighing nickel nitrate, manganese acetate, magnesium nitrate, use deionized water dissolving, obtain solution A; The citric acid of weighing equimolar amounts is used deionized water dissolving, obtains solution B; Prepared A solution joined in the B solution stirred 60 minutes, regulate pH value to 7 with ammoniacal liquor, 60 ℃ down dehydration obtain xerogel, obtain buff powder under 180 ℃, ground 30 minutes, and placed 700 ℃ of thermal decompositions of box type furnace 2 hours, obtain NTC temperature-sensitive fine powder material.
Adopt the curtain coating agent that is complementary with gained NTC temperature-sensitive fine powder material, press powder: curtain coating agent=50: 50 (weight ratio) obtains NTC temperature-sensitive curtain coating oar material with NTC temperature-sensitive fine powder and curtain coating agent ground and mixed 24 hours in the agate jar; With NTC temperature-sensitive curtain coating oar material film forming on curtain coating strip casting machine, wherein the individual layer diaphragm thickness is 20um ± 2um, multilayer diaphragm thickness 500um ± 20um, lamination carries out hot pressing with hot press, and precision gas cutting machine carries out the line cutting, (500 ℃) are arranged sticking in the high temperature drying case, put into sintering furnace and carry out high temperature sintering, sintering temperature is 1200 ℃, and sintering time is 4 hours; NTC temperature-sensitive sintered body is carried out chamfering at edging machine, and in its termination coated machine coating external electrode, burning infiltration electrode in tunnel kiln, carry out three layers of plating then, through 125 ℃ of heat ageings 1000 hours, carry out performance parameter test, the screening finished product, obtaining component size is the multilayer sheet type NTC thermistor element of 1.0mm * 0.5mm * 0.5mm (0402).The NTC thermistor of this sandwich construction made has high accuracy material constant B=4050, B value permissible variation: ± 1%.Resistance value R
25 ℃=47K Ω.
Embodiment 3:(content is unit with the molar percentage)
Multilayer sheet type negative temperature coefficient (NTC) thermistor is a raw material with manganese acetate, cobalt acetate, magnesium nitrate, aluminum nitrate, citric acid (analyzing pure AR); Wherein metal element content is: manganese 50mol%, cobalt 35mol%, magnesium 5mol%, aluminium 10mol%.
By stoichiometric proportion weighing cobalt acetate, manganese acetate, magnesium nitrate, aluminum nitrate is used deionized water dissolving, obtains solution A; The citric acid of weighing equimolar amounts is used deionized water dissolving, obtains solution B; Prepared A solution joined in the B solution stirred 40 minutes, regulate pH value to 6 with ammoniacal liquor, 90 ℃ down dehydration obtain xerogel, obtain buff powder under 220 ℃, ground 60 minutes, and placed 900 ℃ of thermal decompositions of box type furnace 2 hours, obtain NTC temperature-sensitive fine powder material.
Adopt the curtain coating agent that is complementary with NTC temperature-sensitive fine powder material, press powder: curtain coating agent=70: 30 (weight ratio) obtains NTC temperature-sensitive curtain coating oar material with NTC temperature-sensitive fine powder and curtain coating agent ground and mixed 80 hours in the agate jar; With NTC temperature-sensitive curtain coating oar material film forming on curtain coating strip casting machine, wherein the individual layer diaphragm thickness is 20um ± 2um, multilayer diaphragm thickness 500um ± 20um, lamination carries out hot pressing with hot press, and precision gas cutting machine carries out the line cutting, (500 ℃) are arranged sticking in the high temperature drying case, put into sintering furnace and carry out high temperature sintering, sintering temperature is 1300 ℃, and sintering time is 2 hours; NTC temperature-sensitive sintered body is carried out chamfering at edging machine, and in its termination coated machine coating external electrode, burning infiltration electrode in tunnel kiln, carry out three layers of plating then, through 125 ℃ of heat ageings 1000 hours, carry out performance parameter test, the screening finished product, obtaining component size is the multilayer sheet type NTC thermistor element of 1.0mm * 0.5mm * 0.5mm (0402).The NTC thermistor of this sandwich construction made has high accuracy material constant B=4500, B value permissible variation: ± 1%.Resistance value R
25 ℃=470K Ω.
Claims (4)
1, a kind of multilayer sheet type negative tempperature coefficient thermistor, it is characterized in that forming with nickel nitrate, manganese acetate, cobalt acetate, magnesium nitrate, aluminum nitrate, chromic nitrate, citric acid (analyzing pure AR) raw material, each metal element content is respectively in the described thermistor: nickel 0-40mol%, manganese 5-70mol%, cobalt 0-50mol%, magnesium 0-10mol%, aluminium 0-10mol%, chromium 0-5mol%.
2, the manufacture method of the described multilayer sheet type negative tempperature coefficient thermistor of claim 1 is characterized in that may further comprise the steps:
1., by stoichiometric proportion weighing nickel nitrate, manganese acetate, cobalt acetate, magnesium nitrate, aluminum nitrate, chromic nitrate, use deionized water dissolving, make solution A;
2., the citric acid of weighing equimolar amounts, use deionized water dissolving, make solution B;
3., prepared A solution is joined in the B solution and to stir 30-60 minute, regulate pH value to 5-7 with ammoniacal liquor, dehydration obtains xerogel under 60 ℃-90 ℃, obtain buff powder under 180 ℃-220 ℃, ground 30-60 minute, place 600 ℃-900 ℃ of box type furnaces thermal decomposition 2-6 hour, and obtained the negative temperature coefficient heat-sensitive fine powder of black;
4., the curtain coating agent that is complementary of employing and gained temperature-sensitive fine powder material, press powder: curtain coating agent weight ratio: 50-70: 50-30, with gained temperature-sensitive fine powder and curtain coating agent in the agate jar ground and mixed 24-80 hour, obtain negative temperature coefficient heat-sensitive curtain coating oar material;
5., with gained negative temperature coefficient heat-sensitive curtain coating oar material film forming on curtain coating strip casting machine, wherein the individual layer diaphragm thickness is 20um ± 2um, multilayer diaphragm thickness 500um ± 20um, lamination, hot pressing, line cutting, high temperature row glue, put into sintering furnace and carry out high temperature sintering, sintering temperature is 1000 ℃-1300 ℃, and sintering time is 1-8 hour;
6., gained negative temperature coefficient heat-sensitive sintered body prepared external electrode after, carry out three layers of plating, promptly obtained finished product in 1000 hours through 125 ℃ of heat ageings.
3, the manufacture method of multilayer sheet type negative tempperature coefficient thermistor according to claim 2, it is characterized in that it is that the negative temperature coefficient heat-sensitive sintered body is carried out chamfering at edging machine that gained negative temperature coefficient heat-sensitive sintered body is prepared external electrode, and in its termination coated machine coating external electrode, burning infiltration electrode in tunnel kiln.
4, according to the manufacture method of claim 2 or 3 described multilayer sheet type negative tempperature coefficient thermistors, it is characterized in that in the described step 5 gained negative temperature coefficient heat-sensitive curtain coating oar material after film forming on the curtain coating strip casting machine, first electrode lamination again in press printing, the interior electrode of printing is a base-metal inner-electrode.
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| CNB2003101080698A CN100411068C (en) | 2003-10-21 | 2003-10-21 | Multilayer sheet type negative temperature coefficient thermosensitive resistor and producing method thereof |
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| CN102122552A (en) * | 2010-12-08 | 2011-07-13 | 深圳顺络电子股份有限公司 | Negative temperature coefficient thermal resistor with variable thermosensitive index |
| CN102136328A (en) * | 2010-11-02 | 2011-07-27 | 肇庆爱晟电子科技有限公司 | Method for adjusting resistance value of NTC thermistor chip |
| CN102270531A (en) * | 2011-04-28 | 2011-12-07 | 中国科学院新疆理化技术研究所 | Preparation method of laminated sheet-type negative temperature coefficient thermistor |
| CN101318814B (en) * | 2008-07-10 | 2012-03-21 | 中国计量学院 | Hydrothermal reaction method for manufacturing negative temperature coefficient heat-sensitive powder |
| CN105575569A (en) * | 2016-02-26 | 2016-05-11 | 深圳市固电电子有限公司 | Thermistor chip and preparation method thereof |
| CN105810377A (en) * | 2016-05-24 | 2016-07-27 | 怀远县金浩电子科技有限公司 | Liquid-phase preparation method of thermistor powder material |
| CN106835081A (en) * | 2017-02-28 | 2017-06-13 | 宁夏大学 | The preparation method of NTC thermosensitive material films |
| CN106876069A (en) * | 2017-03-13 | 2017-06-20 | 中国科学院新疆理化技术研究所 | The uniform co-precipitation preparation method of manganese cobalt nickel based negative temperature coefficient thermistor material |
| CN110024053A (en) * | 2017-06-20 | 2019-07-16 | 株式会社芝浦电子 | Thermistor sintering body and thermistor element |
| CN110156478A (en) * | 2019-06-06 | 2019-08-23 | 宁波科联电子有限公司 | A kind of low-temperature sintering oxide temperature-sensitive element, manufacturing device and its manufacturing method |
| CN112259311A (en) * | 2020-10-09 | 2021-01-22 | 新昌中国计量大学企业创新研究院有限公司 | Chip NTC thermistor and preparation method thereof |
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| CN1147880C (en) * | 2000-11-01 | 2004-04-28 | 中国科学院新疆理化技术研究所 | Thermosensitive oxide resistor material |
| JP2003272904A (en) * | 2002-03-19 | 2003-09-26 | Tdk Corp | Composite laminated chip ntc thermistor |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101318814B (en) * | 2008-07-10 | 2012-03-21 | 中国计量学院 | Hydrothermal reaction method for manufacturing negative temperature coefficient heat-sensitive powder |
| CN102136328A (en) * | 2010-11-02 | 2011-07-27 | 肇庆爱晟电子科技有限公司 | Method for adjusting resistance value of NTC thermistor chip |
| CN102122552A (en) * | 2010-12-08 | 2011-07-13 | 深圳顺络电子股份有限公司 | Negative temperature coefficient thermal resistor with variable thermosensitive index |
| CN102122552B (en) * | 2010-12-08 | 2012-11-07 | 深圳顺络电子股份有限公司 | Negative temperature coefficient thermal resistor with variable thermosensitive index |
| CN102270531A (en) * | 2011-04-28 | 2011-12-07 | 中国科学院新疆理化技术研究所 | Preparation method of laminated sheet-type negative temperature coefficient thermistor |
| CN105575569B (en) * | 2016-02-26 | 2018-07-27 | 深圳市固电电子有限公司 | The preparation method of thermistor chip |
| CN105575569A (en) * | 2016-02-26 | 2016-05-11 | 深圳市固电电子有限公司 | Thermistor chip and preparation method thereof |
| CN105810377A (en) * | 2016-05-24 | 2016-07-27 | 怀远县金浩电子科技有限公司 | Liquid-phase preparation method of thermistor powder material |
| CN106835081A (en) * | 2017-02-28 | 2017-06-13 | 宁夏大学 | The preparation method of NTC thermosensitive material films |
| CN106876069A (en) * | 2017-03-13 | 2017-06-20 | 中国科学院新疆理化技术研究所 | The uniform co-precipitation preparation method of manganese cobalt nickel based negative temperature coefficient thermistor material |
| CN110024053A (en) * | 2017-06-20 | 2019-07-16 | 株式会社芝浦电子 | Thermistor sintering body and thermistor element |
| CN110024053B (en) * | 2017-06-20 | 2021-03-09 | 株式会社芝浦电子 | Thermistor sintered compact and thermistor element |
| CN110156478A (en) * | 2019-06-06 | 2019-08-23 | 宁波科联电子有限公司 | A kind of low-temperature sintering oxide temperature-sensitive element, manufacturing device and its manufacturing method |
| CN112259311A (en) * | 2020-10-09 | 2021-01-22 | 新昌中国计量大学企业创新研究院有限公司 | Chip NTC thermistor and preparation method thereof |
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| CN100411068C (en) | 2008-08-13 |
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