KR101906032B1 - Perovskite oxynitride pigment and manufacturing method of the same - Google Patents

Abstract

The perovskite-based oxynitride pigments according to the present invention contain an alkaline earth metal and a transition metal. The present invention also provides an inorganic pigment that is harmless to humans and the environment, is stable at high temperatures, and has excellent color development.

Description

[0001] The present invention relates to a perovskite oxynitride pigment and a manufacturing method thereof,

The present invention relates to perovskite-based oxynitride pigments and their preparation.

A pigment is a collective term for insoluble colored or colorless materials used for coloring. It is a suitable medium called "Vehicle" and dispersed in water, oil or an organic solvent in which resin is dissolved, It is also used to add color to rubber and plastics.

In general, pigments are divided into inorganic pigments and organic pigments. The inorganic pigments are present in the form of oxides, hydroxides, and salts. Of these oxides, the specific gravity currently used as ceramic pigments is gradually increasing. Usually, metal oxides are mixed with fluxes, glazes, substrates, etc., and are used for ceramics, glass, enamel, etc. after firing at high temperature. Among them, red ceramic pigments are sensitive to the size and dispersibility of powders. Pigments containing cadmium (Cd) and lead (Pb) have been widely used. Recently, Restriction of Hazardous (RoHS) Substance Directive limits the use of cadmium (Cd) and lead (Pb), and it is urgent to develop environmentally friendly low-cost alternative pigments.

Particularly, CdSeS is mainly used as a red pigment, but toxic problems have recently been pointed out and the necessity of development of alternative pigments is emerging.

In order to solve such a problem, Korean Patent No. 10-0932862 discloses a tantalum-based red pigment. However, this prior art technique has a problem in that color reproduction is difficult and color discoloration easily occurs when heat is applied.

Therefore, it is necessary to develop a special pigment which is basically harmless to human beings and environment, stable at high temperature, and excellent in hue of color.

Korean Patent No. 10-0932862

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and it is an object of the present invention to provide a perovskite-based oxynitride pigment which is environmentally friendly and excellent in high-temperature stability and color development.

The present invention also provides a method for producing a perovskite-based oxynitride excellent in high-temperature stability and color development.

On the other hand, other unspecified purposes of the present invention will be further considered within the scope of the following detailed description and easily deduced from the effects thereof.

In order to achieve the above object, the perovskite-based oxynitride pigment according to an embodiment of the present invention contains an alkaline earth metal and a transition metal, and the perovskite-based oxynitride pigment can be represented by the following formula :

[Chemical Formula 1]

AM'X ₃

Wherein A and M 'independently of one another include an alkaline earth metal, wherein M' comprises at least tantalum, and X comprises oxygen and nitrogen.

In the perovskite-based oxynitride pigment according to an embodiment of the present invention, A may be one or two selected from strontium and barium.

In the perovskite-based oxynitride pigment according to an embodiment of the present invention, M 'may include tantalum and magnesium, and the molar ratio of tantalum / magnesium may be 2 or more and 9 or less.

In the perovskite-based oxynitride pigment according to an embodiment of the present invention, X may have an oxygen / nitrogen molar ratio of 5 or more and less than 14.

In the perovskite-based oxynitride pigment according to an embodiment of the present invention, the perovskite-based oxynitride pigment may have a band gap energy of 1.9 to 2.5 eV.

In the perovskite-based oxynitride pigment according to an embodiment of the present invention, the perovskite-based oxynitride pigment has an L * value of CIE L * a * b * of 60.2 to 83.4, 18.0, and the b * value may be 45.0 to 65.0

In the perovskite-based oxynitride pigment according to an embodiment of the present invention, the perovskite-based oxynitride pigment has an L * value of CIE L * a * b * of 35.1 to 60.0, 22.0, and the b * value may be 18.0 to 40.0.

The present invention also provides a method for producing the above-mentioned perovskite-based oxynitride pigment.

A method of manufacturing a perovskite-based oxynitride pigment according to an embodiment of the present invention includes the steps of: preparing an oxide containing an alkaline earth metal and a transition metal; And nitriding the oxides and the magnesium compound, wherein the perovskite-based oxynitride pigment is represented by the following formula (1)

[Chemical Formula 1]

AM'X ₃

Wherein A and M 'independently of one another include an alkaline earth metal, wherein M' comprises at least tantalum, and X comprises oxygen and nitrogen.

In the method for producing the perovskite-based oxynitride pigment according to an embodiment of the present invention, the nitridation reaction may be a heat treatment at 800 to 1000 ° C in an ammonia atmosphere.

In the method for producing the perovskite-based oxynitride pigment according to an embodiment of the present invention, when the alkaline earth metal and the oxide containing the transition metal are mixed with the magnesium compound, the molar ratio of the transition metal to the magnesium is 1: 0.25 To 0.75.

The perovskite-based oxynitride pigment according to the present invention is harmless to humans and the environment, is stable at high temperature, and is excellent in color development degree by containing the above-mentioned alkaline earth metal and transition metal.

On the other hand, even if the effects are not explicitly mentioned here, the effect described in the following specification, which is expected by the technical features of the present invention, and its potential effects are treated as described in the specification of the present invention.

1 is a schematic diagram showing a crystal structure of a perovskite-based oxynitride pigment according to an embodiment of the present invention.
2 is a process diagram showing a method of manufacturing a perovskite-based oxynitride pigment according to an embodiment of the present invention.
3 is an XRD graph of the perovskite-based oxynitride pigments according to Examples 1 and 2 of the present invention.
4 is an XRD graph of the perovskite-based oxynitride pigments according to Examples 3 and 4 of the present invention.
5 is a diffuse-reflection absorption spectrum of a perovskite-based oxynitride pigment according to an embodiment of the present invention.
FIG. 6 is a graph showing the CIE L * a * b * values of perovskite-based oxynitride pigments according to an embodiment of the present invention.

Hereinafter, the present invention will be described in detail. The following embodiments and drawings are provided by way of example so that those skilled in the art can fully understand the spirit of the present invention. In addition, unless otherwise defined in the technical and scientific terms used herein, unless otherwise defined, the meaning of what is commonly understood by one of ordinary skill in the art to which this invention belongs is as follows, A description of known functions and configurations that may unnecessarily obscure the gist of the present invention will be omitted.

In the present specification, the term "CIE L * a * b *", which is used in the present specification, is a result of research for approaching human emotion. Based on the contrasting color of yellow-blue, green- It can mean the color space defined by the Commission (CIE). Specifically, " L * " represents the reflectance (lightness such as a human's sensation), and the unit of decimal point can also be expressed in steps of 0 to 100. "a *" is a chromaticity diagram. + a * represents red, and -a * represents green. "b *" is a chromaticity diagram, in which + b * indicates yellow and -b * indicates blue direction.

The perovskite-based oxynitride pigment according to the present invention contains an alkaline earth metal and a transition metal, and the perovskite-based oxynitride pigment is represented by the following formula 1:

[Chemical Formula 1]

AM'X ₃

Wherein A and M 'independently of one another include an alkaline earth metal, wherein M' comprises at least tantalum, and X comprises oxygen and nitrogen.

The perovskite-based oxynitride pigment according to one embodiment of the present invention satisfies the above-described formula (1), thereby providing pigments which are excellent in high-temperature stability and harmless to humans and the environment.

1 is a schematic diagram showing a crystal structure of a perovskite-based oxynitride pigment according to an embodiment of the present invention. As shown in Fig. 1, the perovskite-based oxynitride pigment may include an alkaline earth metal (A), a transition metal or an alkaline earth metal (M '), and a non-metal heterogeneous element (X). In this case, the alkaline earth metal (A) may be located at each vertex of the hexahedron of FIG. 1, and a non-metal heterogeneous element X may be located at the center of the hexahedron of FIG. A transition metal or an alkaline earth metal (M ') may be located inside the octahedron.

In describing the present invention, the nonmetal heteroelement X means a heteroatomic nonmetal belonging to Groups 14 to 17 of the Periodic Table of the Elements. To achieve the object of the present invention, the nonmetal heteroelement X ) Is preferably one or more selected from nitrogen and oxygen.

In describing the present invention, the alkaline earth metal (A) has a larger ionic radius than a metal ion ionized with the transition metal such as Sr ^{2 +} , Ca ^{2 +} , Ba ^{2 +} , Mg ^{2 +,} etc. and has a relatively low oxidation number And the alkaline earth metal (A) may be one or more selected from strontium (Sr) and barium (Ba) in order to achieve the object of the present invention.

In order to achieve the object of the present invention, the transition metal may be selected from among titanium (Ti), tantalum (Ta), and niobium (Nb). In the present invention, the transition metal may be a material commonly used in this field. Lt; / RTI >

Meanwhile, in the perovskite-based oxynitride pigment according to an embodiment of the present invention, X may have an oxygen / nitrogen molar ratio of 5 or more and less than 14. When the oxygen / nitrogen molar ratio is satisfied, the band gap energy of the perovskite-based oxynitride pigment according to the present invention can be controlled, and the hue for coloring can be increased.

 In the perovskite-based oxynitride pigment according to an embodiment of the present invention, the M 'may include tantalum and magnesium, and the molar ratio of tantalum / magnesium may be 2 or more and 9 or less. When the tantalum / magnesium molar ratio is satisfied, the perovskite-based oxynitride pigment according to the present invention may have a perovskite crystal structure, and the perovskite-based oxynitride pigment may have a different ionic radius within the crystal structure of the perovskite- A phenomenon such as lattice distortion may occur due to the formation of tantalum and magnesium ions in a mixed state. As a result, the band gap energy of the perovskite-based oxynitride pigment can be changed and more natural color development can be achieved.

Further, in the perovskite-based oxynitride pigment according to an embodiment of the present invention, A may be one or two selected from strontium and barium. When strontium or barium is used, the perovskite-based oxynitride pigment according to the present invention may have a pure crystalline phase which is environment-friendly and stable at high temperature and free from unreacted phase.

As described above, the perovskite-based oxynitride pigment according to the present invention includes the compound represented by AM'X ₃ of the above-mentioned formula (1), so that the band gap energy thereof can be 1.9 to 2.5 eV.

In detail, the perovskite-based oxynitride pigment according to an embodiment of the present invention may have a band gap energy of 2.3 to 2.5 eV when A is strontium (Sr). At this time, the perovskite-based oxynitride pigment according to the present invention has an L * value of CIE L * a * b * of 60.2 to 83.4, an a * value of 0 to 18.0 and a b * value of 45.0 to 65.0 have. Accordingly, the strontium-containing perovskite-based oxynitride pigment according to the present invention can provide a yellow-based inorganic pigment.

Meanwhile, the perovskite-based oxynitride pigment according to the present invention may have a band gap energy of 1.9 to 2.1 eV when A is barium (Ba). In this case, the perovskite-based oxynitride pigment may have an L * value of CIE L * a * b * of 35.1 to 60.0, an a * value of 0 to 22.0, and a b * value of 18.0 to 40.0. Accordingly, the barium-containing perovskite-based oxynitride pigment according to the present invention can provide a brown-based inorganic pigment.

The present invention also includes a method for producing the above-mentioned perovskite-based oxynitride pigments. The method for producing the perovskite-based oxynitride pigment according to the present invention includes the content of the above-mentioned perovskite-based oxynitride pigment.

Referring to FIG. 2, a process for producing a perovskite-based oxynitride pigment according to the present invention comprises a step (S10) of producing a layered perovskite-based oxide for producing an oxide containing an alkaline earth metal and a transition metal, And a step (S20) of preparing a perovskite-based oxynitride pigment by mixing a magnesium compound with an oxide containing a ground metal and a transition metal, followed by nitridation reaction.

Specifically, the perovskite-based oxide production step S10 of the layered structure is a step of solid-state reaction of a mixture of the A raw material and the M 'raw material of the above-mentioned formula (1) to form a layered perovskite oxide May refer to the manufacturing step.

As a specific, non-limiting example, the solid reaction temperature may be 800 to 1500 ° C, and the solid phase reaction may be performed in an active atmosphere or an inert atmosphere.

Meanwhile, the perovskite-based oxynitride pigment preparation step (S20) may be performed by mixing the layered perovskite-type oxide produced in the perovskite-based oxide production step (S10) of the layered structure with a magnesium compound, And the like.

Specifically, the nitridation reaction may be a heat treatment at about 800 to 1000 占 폚 in an atmosphere containing ammonia gas.

Further, in the step (S20) of producing the perovskite-based oxynitride pigment according to an embodiment of the present invention, when the alkaline earth metal and the transition metal-containing oxide are mixed with the magnesium compound, the molar ratio of the transition metal to magnesium 1: 0.25 to 0.75.

Hereinafter, the present invention will be described in detail with reference to the following examples. However, the present invention is not limited to the following examples.

Example 1

Solid reaction ( Solid state reaction ) Sr ₅ Ta ₄ O ₁₅  synthesis

SrCO ₃ (Aldrich, 99.9%) and Ta ₂ O ₅ (Advanced Chemicals, 99.99%) were weighed in a molar ratio of 5: 2 and then subjected to solid phase reaction at 1300 ° C for 4 hours in air to obtain Sr ₅ Ta ₄ O ₁₅ . The crystal Sr of the product Sr ₅ Ta ₄ O ₁₅ was confirmed by XRD measurement and is shown in FIG. 3 (a).

nitrification  Reaction SrMg _{0 . 2} Ta _{0 . 8} O _{2 . 6} N _{0 .4}  synthesis

The product Sr ₅ Ta ₄ O ₁₅ and MgCl ₂ (Alfa Aesar, 99%) were weighed and mixed at a molar ratio of 1: 1 to prepare a mixture of Sr ₅ Ta ₄ O ₁₅ and MgCl ₂ . Then, 2 g of the mixture was put into a molder and pressurized to 10 MPa and made into pellets.

The pellet is 30 hours in an ammonia (NH ₃₎ is processed 15 hours the first nitriding at 850 ℃ in a tubular furnace flowing to 150 sccm, and then 30 hours a second nitriding treatment at 900 ℃, and then the 950 ℃ final temperature 3 by nitriding SrMg _{0. 2} Ta _{0 . 8} O _{2 . 6} N _{0 . 4} was prepared. Fig. 3 (b) shows the crystal phase of the perovskite-based oxynitride pigment produced after the first nitriding treatment, Fig. 3 (c) shows the crystal phase of the perovskite-based oxynitride pigment after the second nitriding treatment, The crystal phase of the perovskite-based oxynitride pigment is shown in Fig. 3 (d).

Example 2

The Sr ₅ Ta ₄ O ₁₅ and MgCl ₂ Is a mixed pellet of ammonia (NH ₃₎ is in a tubular furnace with a flowing 150 sccm at process 950 ℃ 60 sigan nitride SrMg _{0. 2} Ta _{0 . 8} O _{2 . 6} N _{0 . 4} was prepared. The crystalline phase of the perovskite-based oxynitride pigment prepared in Example 2 is shown in Fig. 3 (e).

Example 3

Solid reaction ( Solid state reaction ) Ba ₅ Ta ₄ O ₁₅  synthesis

8.97 g of BaCO ₃ (Alfa Aesar, 99.95%) and 8.04 g of Ta ₂ O ₅ (Advanced Chemicals, 99.99%) were weighed in a molar ratio of 5: 2 and then subjected to solid phase reaction at 1300 ° C for 8 hours in air to obtain Ba ₅ Ta ₄ O ₁₅ . The crystal phase of the product Ba ₅ Ta ₄ O ₁₅ was confirmed by XRD measurement and is shown in FIG. 4 (a).

nitrification  Reaction BaMg _{0 . 2} Ta _{0 . 8} O _{2 . 6} N _{0 .4}  synthesis

The product Ba ₅ Ta ₄ O ₁₅ and MgCl ₂ (Alfa Aesar, 99%) were weighed and mixed at a molar ratio of 1: 1 to prepare a mixture of Ba ₅ Ta ₄ O ₁₅ and MgCl ₂ . Then, 2 g of the mixture was put into a molder and pressurized to 10 MPa and made into pellets.

The pellet is ammonia (NH ₃₎ is in a tubular furnace flowing to 150 sccm 12 hours the first nitriding treatment at 900 ℃, followed by 12 hours a second nitriding treatment, followed by 48 hours at 930 ℃ a final temperature at 900 ℃ 3 BaMg _{0 . 2} Ta _{0 . 8} O _{2 . 6} N _{0 . 4} was prepared. Fig. 4 (b) shows the crystal phase of the perovskite-based oxynitride pigment produced after the first nitriding treatment according to Example 3, and Fig. 4 (c) shows the crystal phase of the perovskite- , And the crystal phase of the perovskite-based oxynitride pigment after the third nitriding treatment is shown in Fig. 4 (d).

Example 4

The pellet obtained by mixing Ba ₅ Ta ₄ O ₁₅ and MgCl ₂ of Example 3 was nitrided at 930 ° C for 72 hours in a tubular furnace in which ammonia (NH ₃ ) flows at 150 sccm to obtain BaMg _{0 . 2} Ta _{0 . 8} O _{2 . 6} N _{0 . 4} was prepared. The crystalline phase of the perovskite-based oxynitride pigment prepared in Example 4 is shown in Fig. 4 (e).

Measurement example 1

The AMg _{0 . 2} Ta _{0 . 8} O _{2 . 6} N _{0 .4} to analyze a crystal structure of the (A = Sr or Ba) by measuring the XRD (X-Ray Diffraction) is shown the graph in Fig. 3 and Fig.

FIG. 3 (a) shows a crystalline phase of Sr ₅ Ta ₄ O ₁₅ , which is a perovskite oxide of the layered structure produced in Examples 1 and 2, and FIG. 3 (b) Gt; SrMg < / RTI > ₀ , which is a perovskite-based oxynitride pigment _{. 2} Ta _{0 . 8} O _{2 . 6} N _{0 .} Represents a _four-crystal phase, and Fig. 3 (c) of Example 1 after the second nitriding process in a represents a crystal phase of manufacturing a perovskite teugye the oxynitride pigment _{SrMg 0.2 Ta 0.8 O 2.6 N 0.4} , Figure 3 (d) is The perovskite-based oxynitride pigment produced in Example 1 after the third nitriding treatment, SrMg _{0 . 2} Ta _{0 . 8} O _{2 . 6} N _{0 .} Refers to the crystalline phase _4, Fig. 3 (e) is a SrMg ₀ in Example 2 at a time at 950 ℃ 60 hours after nitriding is manufactured perovskite teugye oxynitride _{pigment. 2} Ta _{0 . 8} O _{2 . 6} N _{0 . 4} < / RTI >

3 (b) to 3 (e), in the case of nitriding the pellet mixed with Sr ₅ Ta ₄ O ₁₅ and MgCl ₂ , the perovskite-based oxynitride pigment SrMg _{0 . 2} Ta _{0 . 8} O _{2 . 6} N _{0 . 4} can be obtained. As shown in Fig. 3 (d), when the first nitriding treatment, the second nitriding treatment and the third nitriding treatment described above are continuously performed, pure SrMg _{0 . 2} Ta _{0 . 8} O _{2 . 6} N _{0 . 4} crystal phase.

4 (a) shows a crystal phase of Ba ₅ Ta ₄ O ₁₅ , which is a perovskite oxide of the layered structure produced in Examples 3 to 4, and FIG. 4 (b) The perovskite-based oxynitride pigment BaMg _{0 . 2} Ta _{0 . 8} O _{2 . 6} N _{0 . 4} (c) shows a crystalline phase of BaMg _0.2 Ta _0.8 O _2.6 N _0.4 , which is a perovskite-based oxynitride pigment produced after the second nitridation treatment in Example 3, and FIG. 4 (d) BaMg ₀ , which is a perovskite-based oxynitride pigment produced after the third nitriding treatment in Example 3 _{. 2} Ta _{0 . 8} O _{2 . 6} N _{0 . 4} shows the crystal phase of BaMg ₀ , which is a perovskite-based oxynitride pigment produced after nitriding treatment at 930 ° C for 72 hours in Example 4 at once in FIG. 4 (e) _{. 2} Ta _{0 . 8} O _{2 . 6} N _{0 . 4} < / RTI >

Referring to FIGS. 4 (b) to 4 (e), when the pellet mixed with Ba ₅ Ta ₄ O ₁₅ and MgCl ₂ is nitrided, the perovskite oxynitride pigment BaMg _{0 . 2} Ta _{0 . 8} O _{2 . 6} N _{0 . 4} can be obtained. Further, as shown in Fig. 4 (d), when the first nitriding treatment, the second nitriding treatment and the third nitriding treatment of the above-described Example 3 are continuously performed, pure BaMg _{0 . 2} Ta _{0 . 8} O _{2 . 6} N _{0 . 4} crystal phase.

Measurement example 2

The AMg _{0 . 2} Ta _{0 . 8} O _{2 .} Shows the reflection absorption spectra of Fig. 5 (diffuse-reflectance absorption spectra) - 6 N 0 .4 diffusion of (A = Sr or Ba). ST represents SrTaO ₂ N, SNT represents SrNa _{0 . 2} Ta _{0 . 8} O _{2 . 8} N _{0 .2} , and SMT is SrMg _{0 . 2} Ta _{0 . 8} O _{2 . 6} N _{0 .4} , SLT is SrLi _{0 . 2} Ta _{0 . 8} O _{2 . 8} N _{0 .2} , BT is BaTaO ₂ N, BLT is BaLi _0.2 Ta _0.8 O _2.8 N _0.2 , and BMT is BaMg _{0 . 2} Ta _{0 . 8} O _{2 . 6} N _{0 .4} to, BNT is BaNa _0.2 Ta _0.8 O _2.8 N represents a _0.2, respectively, the figures in parentheses indicate the ST, SNT, SMT, SLT, BT, BLT, BMT, BNT each band gap energy (unit: eV) .

5, the embodiment of SMT prepared in _{1 (SrMg 0. 2 Ta 0} . 8 O 2. 6 N 0. 4) it was confirmed that the band gap energy of about 2.40 eV. Also, BMT (BaMg _0.2 Ta _0.8 O _2.6 N _0.4 ) prepared in Example 3 had a band gap energy of about 1.99 eV.

Measurement example 3

Said similarly or the same as that described in the Measurement Example 2, prepared in Example _{1 SMT (SrMg 0.2 Ta 0.8 O} 2.6 N 0.4) manufactured by a pigment as in Example _{3 BMT (BaMg 0. 2 Ta} 0. 8 O 2 _{. 6 0 .4} N) was measured for the color of the pigment. The pigment was analyzed with a color spectrophotometer (ColorMate, SCINCO) based on the colorimetric system (L *, a *, b *) of the International Lighting Commission (CIE) . A * is determined by a value corresponding to the abscissa, and b * is a value obtained by measuring a CIE L * a * b * measurement result of each of ST, SNT, SMT, SLT, BT, BLT, BMT and BNT shown in FIG. Is determined by the value corresponding to the vertical axis, and the numerical value in parentheses means L * value.

6, Example 1, a _{SMT (SrMg 0. 2 Ta 0} . 8 O 2. 6 N 0 .4) produced in L * value of the pigment is from about 74 to about 77, a * value of about 10 to 12, and the b * value was about 53 to 57. In addition, the prepared in Example _{3 BMT (BaMg 0. 2 Ta} 0. 8 O 2. 6 N 0 .4) L * value of the pigment is from about 48 to about 51, a * values are about 18 to 21, b * Value was found to be about 23-27.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, Those skilled in the art will recognize that many modifications and variations are possible in light of the above teachings.

Accordingly, the spirit of the present invention should not be construed as being limited to the embodiments described, and all of the equivalents or equivalents of the claims, as well as the following claims, belong to the scope of the present invention .

Claims (10)

In a perovskite-based oxynitride pigment containing an alkaline earth metal and a transition metal,
The perovskite-based oxynitride pigment is represented by the following formula (1)
[Chemical Formula 1]
AM'X ₃
Wherein A is one or two selected from strontium and barium, M 'comprises tantalum and magnesium, and X comprises oxygen and nitrogen.
The perovskite-based oxynitride pigment is a perovskite-
Wherein when the A is strontium, the band gap energy is 2.3 to 2.5 eV, the L * value of CIE L * a * b * is 60.2 to 83.4, the a * value is 0 to 18.0, 65.0,
Wherein when the A is barium, the band gap energy is 1.9 to 2.1 eV, the L * value of the CIE L * a * b * is 35.1 to 60.0, the a * value is 0 to 22.0, 40.0,
The molar ratio of tantalum / magnesium is 2 or more and 9 or less,
X is a perovskite-based oxynitride pigment having an oxygen / nitrogen molar ratio of 5 or more and less than 14;
delete delete delete delete delete delete A method for producing a perovskite-based oxynitride pigment containing an alkaline earth metal and a transition metal,
Strontium or barium; And tantalum; < / RTI > And
Strontium or barium; And a magnesium compound and then subjecting the mixture to a nitridation reaction,
The perovskite-based oxynitride pigment is represented by the following formula (1)
[Chemical Formula 1]
AM'X ₃
Wherein A is one or two selected from strontium and barium, M 'comprises tantalum and magnesium, and X comprises oxygen and nitrogen.
The perovskite-based oxynitride pigment is a perovskite-
Wherein when the A is strontium, the band gap energy is 2.3 to 2.5 eV, the L * value of CIE L * a * b * is 60.2 to 83.4, the a * value is 0 to 18.0, 65.0,
Wherein when the A is barium, the band gap energy is 1.9 to 2.1 eV, the L * value of the CIE L * a * b * is 35.1 to 60.0, the a * value is 0 to 22.0, 40.0,
The molar ratio of tantalum / magnesium is 2 or more and 9 or less,
Wherein X is an oxygen / nitrogen molar ratio of 5 or more and less than 14 Method for the production of perovskite based oxynitride pigments.
9. The method of claim 8,
Wherein the nitridation reaction is performed in an ammonia atmosphere at 800 to 1000 占 폚.
9. The method of claim 8,
Strontium or barium; Wherein the molar ratio of tantalum to magnesium is 1: 0.25 to 0.75 when an oxide containing tantalum and a magnesium compound are mixed.

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