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Blue powder preparation method for ceramic ink

A ceramic ink, blue technology, applied in chemical instruments and methods, inks, applications, etc., can solve the problems of complex preparation process, low powder purity, harsh conditions, etc., and achieve simple process, high purity, and mild conditions. Effect

Inactive Publication Date: 2018-04-24
FOSHAN CAIGUI NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of this, the present invention provides a kind of blue powder preparation method for ceramic ink, which solves the problem of CoAl 2 o 4 The purity of the powder is not high, the particle size is large, the preparation process is complicated, the conditions are harsh, and the cost is high.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Prepare 0.1mol / l AlCl 3 aqueous solution, spare;

[0047] Prepare 0.2mol / l Co(NO 3 ) 2 aqueous solution, spare;

[0048] Prepare 4mol / l NH 3 -H 2 O aqueous solution, standby;

[0049] AlCl 3 Add Co(NO 3 ) 2 In aqueous solution, making Co 2+ with Al 3+ The molar ratio is 1:2, the solution is stirred to obtain solution a;

[0050] Add NH to solution a 3 -H 2 O aqueous solution to obtain b solution, control the pH value of b solution to 12.5, and stir until no precipitation occurs;

[0051] Place b solution in a reaction kettle for heating, keep the pressure at 0.6MPa, and the reaction time is 16h, then reduce the pressure, cool to room temperature, and precipitates;

[0052] Centrifuge the b solution with the precipitate at a centrifugal speed of 12000r / min to obtain the precipitate;

[0053] Place the precipitate in a desiccant for drying, the drying temperature is 40°C, and the drying time is 16h;

[0054] The dried precipitate was ground to obtain CoAl ...

Embodiment 2

[0056] Prepare 0.5mol / l AlCl 3 aqueous solution, spare;

[0057] Prepare 0.05mol / l Co(NO 3 ) 2 aqueous solution, spare;

[0058] Prepare 2mol / l NH 3 -H 2 O aqueous solution, standby;

[0059] AlCl 3 Add Co(NO 3 ) 2 In aqueous solution, making Co 2+ with Al 3+ The molar ratio is 1:2, the solution is stirred to obtain solution a;

[0060] Add NH to solution a 3 -H 2O aqueous solution to obtain b solution, control the pH value of b solution to 11.5, and stir until no precipitation occurs;

[0061] Place b solution in a reaction kettle for heating, keep the pressure at 0.5MPa, and the reaction time is 20h, then reduce the pressure, cool to room temperature, and precipitates;

[0062] Centrifuge the b solution with the precipitate at a centrifugal speed of 15000r / min to obtain the precipitate;

[0063] Place the precipitate in a desiccant for drying, the drying temperature is 20°C, and the drying time is 24h;

[0064] The dried precipitate was ground to obtain CoAl ...

Embodiment 3

[0066] Prepare 0.2mol / l AlCl 3 aqueous solution, spare;

[0067] Prepare 0.15mol / l Co(NO 3 ) 2 aqueous solution, spare;

[0068] Prepare 3mol / l NH 3 -H 2 O aqueous solution, standby;

[0069] AlCl 3 Add Co(NO 3 ) 2 In aqueous solution, making Co 2+ with Al 3+ The molar ratio is 1:2, the solution is stirred to obtain solution a;

[0070] Add NH to solution a 3 -H 2 O aqueous solution to obtain b solution, control the pH value of b solution to 11.8, and stir until no precipitation occurs;

[0071] Put the b solution in the reaction kettle for heating, keep the pressure at 0.58MPa, and the reaction time is 19h, then reduce the pressure, cool to room temperature, and precipitates;

[0072] Centrifuge the b solution with the precipitate at a centrifugal speed of 14000r / min to obtain the precipitate, and then use 5mol / l ethanol to wash with alcohol, and the number of alcohol washes is 3 times;

[0073] Place the precipitate in a desiccant for drying, the drying temper...

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Abstract

The invention discloses a blue powder preparation method for ceramic ink, which includes steps of preparing 0.1-0.5 mol / l AlCl3 solution for future use; preparing 0.05-0.2 mol / l Co (NO3)2 solution forfuture use; preparing 2-4 mol / l NH3-H2O solution for future use; adding AlCl3 solution in Co (NO3)2 solution, keeping the mole ratio of Co<2+> and Al<3+> as 1: 2; stirring the solution to obtain solution a; adding NH3-H2O solution in the solution a to obtain b solution; controlling the PH value of the b solution as 11.5-12.5, and stirring until no sediment produces; placing b solution in a reaction kettle to heat, and keeping the pressure strength as 0.5-0.6 MPa, and the reacting for 16-20 hours; then depressurizing and cooling to room temperature; separating out sediment, and centrifuging the b solution with sediment at the speed of 12000-15000 r / min to obtain the sediment; placing the sediment in the drying agent to dry, wherein the drying temperature is 20-40 DEG C and the drying timeis 16-24 hours; grinding the dried sediment to obtain CoAl2O4. The blue powder preparation method well solves the problem of low purity, big grain diameter, complex preparation technique, strict condition, high cost and others of CoAl2O4 powder.

Description

technical field [0001] The invention relates to the technical field of ceramic ink, in particular to a method for preparing blue powder used in ceramic ink. Background technique [0002] With the rapid development of industry, there are more and more types of commodities on the market, and many commodities are increasingly pursuing high quality. [0003] As a key part of ceramic inkjet printing technology, ceramic ink has been monopolized by foreign companies, which makes the price of domestic ceramic ink remain high. Among them, the core of ceramic ink is ceramic powder, so ceramic powder technology is the key to ceramic inkjet printing technology. [0004] CoAl 2 o 4 As a kind of blue powder, powder is widely used, but the existing CoAl 2 o 4 The purity of the powder is not high, and the particle size produced is relatively large. When used in ceramic ink, it is reflected in uneven chroma and poor dispersion. Moreover, the existing preparation method is complex in pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D11/322C01G51/00
CPCC01G51/00C09D11/322
Inventor 毛海燕谭海林
Owner FOSHAN CAIGUI NEW MATERIAL CO LTD