Precursor water solution for preparing CaCu3Ti4O12 and preparing method thereof

A technology of calcium copper titanate, citric acid aqueous solution, applied in chemical instruments and methods, inert gas compounds, inorganic chemistry and other directions, can solve the problems of not meeting economic requirements, low utilization rate of raw materials, etc., and achieves low preparation cost and raw materials. The effect of high utilization and easy post-processing

Active Publication Date: 2009-08-12
MICROVAST POWER SYST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The raw material utilization rate of the above process is low and does not meet the economic requirements

Method used

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  • Precursor water solution for preparing CaCu3Ti4O12 and preparing method thereof
  • Precursor water solution for preparing CaCu3Ti4O12 and preparing method thereof
  • Precursor water solution for preparing CaCu3Ti4O12 and preparing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Weigh 12.600g of citric acid monohydrate and dissolve in 60ml of deionized water to obtain a clear and transparent solution. Weigh 1.113gCa(OH) 2 , while maintaining vigorous stirring, the Ca(OH) 2 Added to the prepared aqueous citric acid solution to obtain a clear and transparent solution.

[0035] Weigh 4.390g Cu(OH) 2 , under the condition of maintaining vigorous stirring, the Cu(OH) 2 Slowly add dissolved Ca(OH) 2 Aqueous solution of citric acid to obtain blue transparent solution A 1 .

[0036] Weigh 25.216g of citric acid monohydrate and dissolve in 100ml of deionized water to obtain a clear and transparent solution. Weigh 20.470 g of n-butoxytitanium, and slowly add n-butoxytitanium dropwise into the citric acid aqueous solution under the condition of maintaining vigorous stirring. After the dropwise addition, continue to stir vigorously to obtain a yellow clear solution B 1 .

[0037] A will be produced 1 Solution and B 1 The solutions are mixed unde...

Embodiment 2

[0040] Weigh 12.600g of citric acid monohydrate and dissolve in 60ml of deionized water to obtain a clear and transparent solution. Weigh 0.840 g of ground CaO, and add CaO to the prepared citric acid aqueous solution under the condition of maintaining vigorous stirring to obtain a clear and transparent solution.

[0041] Weigh 4.390g Cu(OH) 2 , under the condition of maintaining vigorous stirring, the Cu(OH) 2 Slowly add CaO-dissolved citric acid aqueous solution to obtain blue transparent solution A 2 .

[0042] Weigh 25.216g of citric acid monohydrate and dissolve in 100ml of deionized water to obtain a clear and transparent solution. Weigh 20.420 g of n-butoxytitanium, and slowly add n-butyl titanate dropwise into the aqueous citric acid solution under the condition of maintaining vigorous stirring. After the dropwise addition, continue to stir vigorously to obtain a yellow clear solution B 2 .

[0043] A will be produced 2 Solution and B 2 The solutions are mixed ...

Embodiment 3

[0046] Weigh 2.102g of citric acid monohydrate and dissolve in 20ml of deionized water to obtain a clear and transparent solution. Weigh 0.371gCa(OH) 2 , under the condition of maintaining vigorous stirring, the Ca(OH) 2 Add to the prepared aqueous solution of citric acid to obtain a clear and transparent solution.

[0047] Weigh 1.463g Cu(OH) 2 , under the condition of maintaining vigorous stirring, the Cu(OH) 2 Slowly add dissolved Ca(OH) 2 Aqueous citric acid solution, the final blue transparent solution A 3 .

[0048] Weigh 3.510 g of citric acid monohydrate and dissolve in 20 ml of deionized water to obtain a clear and transparent solution. Weigh 6.806g of n-butoxytitanium, and slowly add n-butoxytitanium into the citric acid aqueous solution dropwise under the condition of maintaining vigorous stirring. After the dropwise addition, continue to stir vigorously, and finally obtain a yellow clear solution B 3 .

[0049] A will be produced 3 Solution and B 3 The s...

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Abstract

The invention discloses a precursor water solution for preparing calcium copper titanate and a preparation method thereof. The preparation method comprises: alkaline calcium salt, alkaline cupric salt, alkoxyl titanium and citric acid water solution are provided, and the ratio between the mol sum of calcium, copper and titanium atoms and the mole number of critic acid radical is more than 0 and less than or equal to 1-5; the alkaline calcium salt, the alkaline cupric salt and the alkoxyl titanium are directly added into the citric acid water solution, and the mixed solution is continuously stirred in the adding process to ensure undissolved substance to be dissolved in time, so that clear solution which is the precursor water solution is obtained. The method has simple preparation technique, and the raw materials are simple and easily obtained, so that the cost is low, and industrialization is easy to realize. After the processes such as preburning decomposition, calcination and the like, the precursor water solution can be used for preparing calcium copper titanate powder with regular granule appearance, and the dielectric constant of the calcium copper titanate powder reaches 4*10.

Description

technical field [0001] The invention relates to an aqueous precursor solution for preparing ceramic powder and a preparation method thereof, in particular to an aqueous precursor solution for preparing copper calcium titanate ceramic powder and a preparation method thereof. The invention also relates to a preparation method of copper calcium titanate ceramic powder. Background technique [0002] With the rapid development of the semiconductor industry, new dielectric materials must meet the following conditions: high dielectric constant, good dielectric and temperature characteristics, high insulation resistivity, low dielectric loss, anti-aging, etc. In 2000, Subramanian et al. discovered calcium copper titanate (CaCu 3 Ti 4 o 12 , referred to as CCTO), this material has a very high dielectric constant (at room temperature, 1kHz frequency conditions, the dielectric constant can reach 10 4 ~10 5 ), low dielectric loss and high thermal stability. These good comprehensive...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B23/00C04B35/626C04B35/462
Inventor 易江平殷玉波杰夫·徐周小平
Owner MICROVAST POWER SYST CO LTD
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