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A kind of preparation method of thermistor ceramic ink for inkjet printing

A thermistor and ceramic ink technology, which is applied in ink, applications, household appliances, etc., can solve the problems of low solid content of ink, not suitable for industrial production, easy reunion, etc., and achieve the effect of wide application range

Active Publication Date: 2017-11-17
中科传感(佛山)科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, based on the current research status at home and abroad, the preparation methods of ordinary ceramic inks that have been published are still concentrated on the dispersion method and the reverse microemulsion method, but the dispersion method is easy to agglomerate due to the large particle size of the pigment and will block or wear the printer nozzle. ; The inverse microemulsion method is not suitable for industrial production due to the low solid content of the prepared ink

Method used

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  • A kind of preparation method of thermistor ceramic ink for inkjet printing

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Experimental program
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Effect test

Embodiment 1

[0020] a. Preparation of thermistor powder: the conventional solid-phase ball milling method is adopted, and the specific steps are:

[0021] To analyze pure MnO 2 , Ni 2 O 3 , Co 2 O 3 , Fe 2 O 3 , ZnO and CuO are two, three or four of them as raw materials, placed in a ball mill tank or agitating container, and then add the grinding balls and the dispersion medium is anhydrous ethanol or acetone, or directly add the dispersion medium anhydrous ethanol or Acetone to obtain a mixture;

[0022] Ball mill or stir the mixture at a speed of 50-450r / min for 8h, and dry it at a temperature of 50-120℃ to obtain a powder;

[0023] After the obtained powder is fully ground, it is calcined and ground at a temperature of 800-900°C, and passed through a 200-mesh screen to obtain thermistor powder, see Table 1;

[0024] b. Preparation of thermistor ceramic ink: disperse the thermistor powder in organic solvents, dispersants and adhesives, ultrasonically stir, and stand to form a uniform and stable...

Embodiment 2

[0031] a. Preparation of thermistor powder: using the reverse microemulsion method, the specific steps are:

[0032] Mix the emulsifier Triton X-100, the co-surfactant n-hexanol, and the oil phase cyclohexane in a beaker according to the proportions, and stir to form an emulsified system;

[0033] According to the volume ratio, the nitrate is two, three or four of cobalt nitrate, manganese nitrate, nickel nitrate, iron nitrate, and copper nitrate to configure a 0.5-3mol / L metal nitrate aqueous solution;

[0034] Add the obtained metal nitrate aqueous solution dropwise to the emulsification system, and stir uniformly to form a microemulsion system;

[0035] Place the obtained microemulsion system on a magnetic stirrer in a constant temperature water bath and magnetically stir;

[0036] Slowly drip ammonia water into the microemulsion system at the ratio of n (metal salt) / n (ammonia water) = 1:1.5, and react at a constant temperature for 4 hours to obtain the product;

[0037] Centrifuge t...

Embodiment 3

[0046] a. Preparation of thermistor powder: using conventional co-precipitation method, the specific steps are:

[0047] Mix two, three or four of the acetates into manganese acetate, cobalt acetate, nickel acetate, iron acetate, copper acetate, and zinc acetate according to the molar ratio, and dissolve them in deionized water to form 1-3mol / L The mixed solution, stir evenly;

[0048] Weigh oxalic acid and sodium hydroxide and mix them separately, add deionized water to completely dissolve oxalic acid and sodium hydroxide to obtain a mixed solution;

[0049] Drop the prepared mixed solution into the prepared acetate mixed solution at a speed of 0.5-2d / s while stirring. After the titration, the pH of the solution is between 1-2 to obtain the mixed solution;

[0050] The obtained mixed solution is aged for 10-12 hours, and centrifuged to obtain a precipitate;

[0051] Wash the obtained precipitate with deionized water and absolute ethanol, and dry at 100°C for 1-3 hours to obtain a drie...

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Abstract

The invention relates to a preparation method of thermistor ceramic ink for inkjet printing. The method firstly prepares thermistor powder, and the metal oxide or metal salt is prepared according to the conventional oxide solid phase ball milling method and chemical liquid phase method. The thermistor powder is prepared by the inverse microemulsion method or the co-precipitation method of the chemical liquid phase method, and then the thermistor powder is mixed with an organic solvent, a dispersant and a binder, ultrasonically, and left standing to obtain a thermal Sensitive ceramic ink. The thermistor ceramic ink obtained by the method of the invention is uniform and stable, does not settle, has excellent ejection stability, excellent effect, and will not easily block nozzles under inkjet printing conditions.

Description

Technical field [0001] The invention relates to a preparation method of electronic components, in particular to a preparation method of thermistor ceramic ink. Background technique [0002] In recent years, with the development of NTC thermistors, traditional bulk NTC thermistors have gradually shown their limitations, and they have begun to produce NTC thermistors with small size, high precision, good sensitivity and high stability. And with the development of the market, the industry demand for small, fast response NTC thermistors is increasing. Due to the small size and short response time of the bead type NTC thermistor, the bead type NTC thermistor is widely used and researched. [0003] However, compared with developed countries, my country’s microbead type NTC thermistors have many key technical problems. For example, microbead type temperature sensors prepared in my country mainly use manual operations. On the one hand, the level of technical manufacturing is backward, the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D11/30
Inventor 姚金城陈龙常爱民蒋春萍高博孔雯雯张奇男
Owner 中科传感(佛山)科技有限公司
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