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Method for preparing CaCu3Ti4O12 ceramic material

A ceramic material and ceramic technology, which is applied in the field of electronic ceramic preparation and technical application, can solve the problems of uneven agglomeration and mixing, large powder particle size, high reaction temperature, etc., to avoid local inhomogeneity, reduce gelation time, and shorten the reaction cycle. short effect

Active Publication Date: 2015-04-22
临沭县益兴供汽维修服务有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the synthesis process of this material mostly uses solid-phase high-temperature synthesis; the solid-phase high-temperature synthesis method generally consists of CuO, TiO 2 , CaCO 3 The problem of this method is that the high reaction temperature of the synthesis makes the particle size of the powder large, the agglomeration is serious and the mixing is uneven, and it is difficult to prepare nano-scale materials. Larger consumption of energy

Method used

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  • Method for preparing CaCu3Ti4O12 ceramic material
  • Method for preparing CaCu3Ti4O12 ceramic material
  • Method for preparing CaCu3Ti4O12 ceramic material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] 1. Nano-CaCu 3 Ti 4 o 12 Powder preparation

[0031] (1) According to CaCu 3 Ti 4 o 12 The stoichiometric ratio of the substance is accurately weighed 10.872g Cu(NO 3 ) 2 ·3H 2 O and 3.5423g Ca(NO 3 ) 2 4H 2 O, add 100mL CH 3 (CH 2 ) 3 OH, reflux at 60°C and stir until completely dissolved to form solution A;

[0032] (2) Mix 20.4mL Ti(OC 4 h 9 ) 4 Slowly drop into solution A, rapidly raise the temperature to 115°C and reflux for 2 hours; then distill off 2 / 3 of the solvent to obtain a brown-green sol, and the distillate is light yellow;

[0033] (3) Dried in a drying oven at 120°C to obtain xerogel, put the xerogel in a muffle furnace and calcined at 800°C for 2 hours, the heating and cooling rate was 4°C / min, and then ground it in an agate mortar to pass 150 mesh Nano-CaCu obtained after sieve 3 Ti 4 o 12 Powder.

[0034] 2. CaCu 3 Ti 4 o 12 Preparation of Ceramics

[0035] (4) in CaCu 3 Ti 4 o 12 Add polyvinyl alcohol (PVA, PVA accounts f...

Embodiment 2

[0039] (1) According to CaCu 3 Ti 4 o 12 The stoichiometric ratio of the substance is accurately weighed 10.872g Cu(NO 3 ) 2 ·3H 2 O and 3.5423g Ca(NO 3 ) 2 4H 2 O, add 100mL CH 3 (CH 2 ) 3 OH, reflux at 60°C and stir until completely dissolved to form solution A;

[0040] (2) Mix 20.4mL Ti(OC 4 h 9 ) 4 Slowly drop in solution A, rapidly raise the temperature to 115°C and reflux for 1 hour; then distill off 2 / 3 of the solvent to obtain a brown-green sol, and the distillate is light yellow.

[0041] (3) Subsequent processes are all identical to Example 1.

Embodiment 3

[0043] (1) The process of preparing solution A is exactly the same as in Example 1.

[0044] (2) Mix 20.4mL Ti(OC 4 h 9 ) 4 Slowly drop in solution A, rapidly raise the temperature to 110°C and reflux for 2 hours; then distill off 2 / 3 of the solvent to obtain a brown-green sol, and the distillate is light yellow.

[0045] (3) Precursor calcination and preparation of CaCu 3 Ti 4 o 12 Ceramic technology is identical with embodiment 1.

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Abstract

The invention relates to a method for preparing a giant dielectric constant type perovskite CaCu3Ti4O12 ceramic material and belongs to the field of preparation and technical application of electronic ceramics. The invention provides a method for preparing nano CaCu3Ti4O12 ceramic powder based on an improved sol-gel process-reflux distillation method; the defects that the traditional sol-gel method is large in solvent amount and long in gelatinization time and the like are overcome, the reaction period is greatly shortened, and high-dielectric property perovskite type nano CaCu3Ti4O12 powder and ceramics with a pure-phase perovskite structure and uniform particle size are obtained.

Description

technical field [0001] The invention relates to a perovskite-type nano-CaCu with giant dielectric constant 3 Ti 4 o 12 The invention relates to a method for preparing ceramic materials, which belongs to the field of electronic ceramic preparation and technical application. Background technique [0002] CaCu 3 Ti 4 o 12 (CCTO) is a new perovskite-like material with a huge dielectric constant discovered in recent years. Due to its high dielectric constant, low dielectric loss, high thermal stability and certain current-voltage The linear performance has attracted widespread attention; these good comprehensive properties can make it applicable to high-density energy storage, thin film devices, high dielectric capacitors, etc. At present, the synthesis process of this material mostly uses solid-phase high-temperature synthesis; the solid-phase high-temperature synthesis method generally consists of CuO, TiO 2 , CaCO 3 The problem of this method is that the high reaction ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/462C04B35/622
Inventor 王茂华张波周芙
Owner 临沭县益兴供汽维修服务有限公司
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