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A kind of preparation method of calcium copper titanate

A technology of calcium source and titanium source, applied in the field of preparation of calcium copper titanate powder, can solve the problem of high content of free copper ions

Active Publication Date: 2014-10-08
BYD CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the problem of high content of free copper ions in the copper calcium titanate powder prepared by the method in the prior art, the present invention provides a preparation method of copper calcium titanate powder, the titanic acid prepared by this method Low content of free copper ions in copper calcium powder

Method used

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  • A kind of preparation method of calcium copper titanate

Examples

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preparation example Construction

[0009] The preparation method of the copper calcium titanate disclosed in the present invention comprises preliminary ball milling of the copper source, the first calcium source and the first titanium source, and then pre-calcining to obtain a precursor; and then combining the precursor with the second calcium source and the second The titanium source is subjected to secondary ball milling to obtain a mixture; then the mixture is subjected to secondary calcination.

[0010] Wherein, the copper source, the first calcium source and the first titanium source are the main reactants, which are used for the reaction to generate the target product calcium copper titanate. The above-mentioned copper source, the first calcium source and the first titanium source are known to those skilled in the art, for example, the copper source can be one or more of copper oxide, copper sulfate, copper chloride, copper nitrate; preferably for copper oxide. For above-mentioned copper sulfate, copper...

Embodiment 1

[0027] This example is used to illustrate the preparation method of calcium copper titanate disclosed in the present invention.

[0028] Mix 10 mol of copper nitrate, 2.5 mol of calcium nitrate and 12.5 mol of titanium oxide evenly, then add them into a ball mill tank, and perform preliminary ball milling at a speed of 100 rad / min for 6 hours.

[0029] Then the preliminary ball-milled product was placed in a crucible, the temperature was raised to 800° C., and then pre-calcined at 800° C. for 24 hours to obtain a precursor.

[0030] Then mix the precursor with 1 mol of calcium carbonate and 1 mol of titanium oxide evenly, then add it into the ball mill tank, and perform a second ball mill for 2 hours at a speed of 300 rad / min to obtain the mixture; then put the mixture in a crucible and heat up to 950°C , and then calcined twice at 950° C. for 4 h to obtain copper calcium titanate product A1.

Embodiment 2

[0032] This example is used to illustrate the preparation method of calcium copper titanate disclosed in the present invention.

[0033] Mix 10 mol copper sulfate, 3 mol calcium carbonate and 13 mol titanium oxide evenly, then add them into a ball mill tank, and perform preliminary ball milling at a speed of 300 rad / min for 2 hours.

[0034] Then the preliminary ball-milled product was placed in a crucible, the temperature was raised to 900° C. at a heating rate of 5° C. / min, and then pre-calcined at 900° C. for 10 hours to obtain a precursor.

[0035] Then mix the precursor with 0.4mol calcium carbonate and 0.4mol titanium oxide evenly, then add it into the ball mill tank, and perform ball milling for 4 hours at a speed of 200rad / min to obtain the mixture; then place the mixture in the crucible and heat up to 900°C, and then calcined twice at 900°C for 5 hours to obtain copper calcium titanate product A2.

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Abstract

The invention provides a preparation method of copper calcium titanate. The method includes performing primary ball milling to copper source, first calcium source and first titanium source, and performing precalcination, to obtain a precursor; performing secondary ball milling to the precursor, second calcium source and second titanium source, to obtain a mixture; and performing secondary calcination to the mixture. The copper calcium titanate powder prepared through the method has low free copper ion content.

Description

technical field [0001] The invention relates to a preparation method of copper calcium titanate, in particular to a preparation method of copper calcium titanate powder used in plastics. Background technique [0002] The chemical formula of calcium copper titanate (CCTO for short) is CaCu 3 Ti 4 o 12 , is a new type of functional ceramic material discovered in 2000, which has a large relative permittivity, good dielectric temperature characteristics, small dielectric loss, and high thermal stability. Devices, thin film devices, and high dielectric composite materials have great application prospects. On the one hand, copper calcium titanate powder can be used as a high dielectric functional filler to be added to resin plastics to prepare high dielectric composite materials; on the other hand, as a laser-activatable copper-based compound, it can also be used to add to plastics, For organic products such as resins, laser activation post-treatment is performed. However, ma...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/462C04B35/626
Inventor 刘彦红周维彭长春
Owner BYD CO LTD