JP2003160741A - Inorganic white pigment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a novel inorganic white pigment which cancels or remarkably reduces problems of the existing inorganic pigments. <P>SOLUTION: The pigment is characterized by containing (1) a first component comprising ZrO<SB>2</SB>of 35-65%, SiO<SB>2</SB>of 5-35%, HfO<SB>2</SB>of 3-20% and TiO<SB>2</SB>of 5-30% and (2) at least one second component selected from the group consisting of Na<SB>2</SB>O, K<SB>2</SB>O, Li<SB>2</SB>O, Rb<SB>2</SB>O, MgO, CaO, SrO, BaO, Al<SB>2</SB>O<SB>3</SB>, P<SB>4</SB>O<SB>10</SB>, V<SB>2</SB>O<SB>5</SB>, NbO, TaO, GeO<SB>2</SB>, SnO<SB>2</SB>, MoO, WO<SB>3</SB>, TlO and Bi<SB>2</SB>O<SB>3</SB>in which a weight ratio of the first component to the second component is 60-90%:40-10%. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to an inorganic white pigment.

In this specification, "%" and "parts" mean "wt%" and "parts by weight", respectively.

[0003]

2. Description of the Related Art Hitherto, as an inorganic white pigment, zirconium silicate (purity of about 90 to 95%, HfO ₂
Containing impurities such as about 2%), titanium oxide (purity about 99%), calcium carbonate (purity about 99%), silica stone (SiO ₂ purity 99)
%), Zinc oxide (purity about 99%), etc. are selectively used according to the application of various materials to which the pigment is added, the use conditions, and the like. For example, zirconium silicate is blended in a sintered product, and titanium oxide, calcium carbonate, zinc oxide, etc. are mainly blended in resins, paints, building materials and the like. However, these known white pigment-containing products have various problems. For example, since zirconium silicate contains HfO ₂ as an impurity, it has a drawback that it is likely to cause discoloration within a relatively short time under severe conditions and also under mild conditions over time. Titanium oxide is often contained in other materials
Reacts with Fe ₂ O ₃ under heating conditions and turns yellow. When the particle size of calcium carbonate, silica stone, and zinc oxide is reduced, the whiteness is lowered and the particles become transparent, and the hiding property is lost.

[0004]

SUMMARY OF THE INVENTION Therefore, the main object of the present invention is to provide a novel inorganic white pigment that solves or greatly reduces the problems of the existing inorganic pigments.

[0005]

Means for Solving the Problems As a result of intensive studies to solve the above-mentioned problems, the present inventor can achieve the object when a novel synthetic inorganic white pigment is used. Found.

That is, the present invention provides the following inorganic white pigment, a method for producing the same, and an application technique based on these. 1. (1) ZrO ₂ 35 to 65%, SiO ₂ 5 to 35%, HfO ₂ 3 to 20% and TiO ₂ 05 to 30% as the first component and (2) Na ₂ O, K ₂ O, Li ₂
O, Rb ₂ O, MgO, CaO, SrO, BaO, Al ₂ O ₃ , P ₄ O ₁₀ , V ₂ O ₅ , N
bO, TaO, CeO ₂ , SnO ₂ , MoO, WO ₃ , containing at least one of the second component selected from the group consisting of TlO and Bi ₂ O ₃ , the weight ratio of the first component and the second component. 60 ~ 90%: 40 ~ 10
%, An inorganic white pigment. 2. The weight ratio of the first component and the second component is 65 to 85%: 35 to 15
The inorganic white pigment according to the above item 1, which is%. 3. Item 3. The inorganic white pigment according to any one of Items 1 and 2 above, which contains an extremely weak radioactive component in an amount exhibiting a radioactivity strength that does not exceed the legally controlled limit. 4. Item 3. The inorganic white pigment according to Item 1 or 2, wherein the average particle size of each component is 100 µm or less. 5. Item 5. The inorganic white pigment according to Item 3 or 4, wherein the average particle size of the ultra-weak radioactive component is within the range of 0.1 to 10 µm. 6. The inorganic white pigment according to any one of the above items 1 to 5, based on the total weight of the first component and the second component, Fe ₂ O ₃ , Cr ₂ O ₃ , MnO, CoO, NiO and CuO. An inorganic coloring pigment containing 0.5 to 3% of at least one coloring component selected from the group consisting of. 7. (1) ZrO ₂ 35 to 65%, SiO ₂ 5 to 35%, HfO ₂ 3 to 20% and TiO ₂ 05 to 30% as the first component and (2) Na ₂ O, K ₂ O, Li ₂
O, Rb ₂ O, MgO, CaO, SrO, BaO, Al ₂ O ₃ , P ₂ O ₅ , V ₂ O ₅ , Nb
O, TaO, CeO ₂ , SnO ₂ , MoO, WO ₃ , containing a second component consisting of at least one selected from the group consisting of WO ₃ , TlO and Bi ₂ O ₃ , the weight ratio of the first component and the second component Is 60-90%: 40-
10% and an average particle size of 100 μm or less, a fired body of inorganic white pigment. 8. The weight ratio of the first component and the second component is 65 to 85%: 35 to 15
The inorganic white pigment fired product according to the above item 7, which is%. 9. 9. The inorganic white pigment fired product according to any one of the above items 7 to 8, which contains an ultraweak radioactive component in an amount less than the legally controlled limit amount. 10. Fe based on the total weight of the first and second components
_{2 O 3, Cr 2 O 3} , MnO, CoO, inorganic colored pigments sintered body according to any one of claim 7-9 comprising 0.5% to 3% coloring component at least one selected from the group consisting of NiO and CuO . 11. (1) ZrO ₂ 35 to 65%, SiO ₂ 5 to 35%, HfO ₂ 3 to 20% and TiO ₂ 05 to 30% as the first component and (2) Na ₂ O, K ₂ O, L
i ₂ O, Rb ₂ O, MgO, CaO, SrO, BaO, Al ₂ O ₃ , P ₂ O ₅ , V ₂ O ₅ ,
_{NbO, TaO, CeO 2, SnO} 2, MoO, WO 3, and a second component consisting of at least one selected from the group consisting of TlO and Bi ₂ O _3, the weight ratio 60% to 90%: the 40-10% A method for producing a fired body of an inorganic white pigment, which comprises firing the obtained mixture at 800 to 1500 ° C. after uniformly mixing in a ratio. 12. Item 12. The method for producing an inorganic white pigment according to Item 11, wherein the fired product contains an ultraweak radioactive component having a radioactivity intensity lower than the legally controlled limit. 13. Item 13. The method for producing an inorganic white pigment fired product according to any one of items 11 and 12 above, wherein the mixture is granulated prior to firing. 14. (1) ZrO ₂ 35 to 65%, SiO ₂ 5 to 35%, HfO ₂ 3 to 20% and TiO ₂ 05 to 30% as the first component and (2) Na ₂ O, K ₂ O, L
i ₂ O, Rb ₂ O, MgO, CaO, SrO, BaO, Al ₂ O ₃ , P ₂ O ₅ , V ₂ O ₅ ,
_{NbO, TaO, CeO 2, SnO} 2, MoO, WO 3, and a second component consisting of at least one selected from the group consisting of TlO and Bi ₂ O _3, the weight ratio 60% to 90%: the 40-10% Mix evenly in proportion,
A method for producing a white glass material, which comprises cooling after melting at 1400 to 1800 ° C. 15. Item 15. The method for producing a white glass material according to Item 14, wherein the white glass material contains an ultraweak radioactive component exhibiting a radioactivity intensity lower than a legally controlled limit. 16. 16. The method for producing a white glass material as described in 14 or 15 above, wherein the white glass material after cooling is crushed and the average particle size of the crushed material is adjusted to 100 μm or less. 17. A resin sheet containing the inorganic white pigment according to any one of items 1 to 5 and 7 to 9 described above in a proportion of 0.5 to 10%. 18. Resin particles containing the inorganic white pigment according to any one of items 1 to 5 and 7 to 9 described above in a proportion of 0.5 to 10%. 19. 0.5 to 10% of the inorganic color pigment according to the above item 6 and / or the fired body of the inorganic color pigment according to the above item 10
The resin sheet contained in the ratio of. 20. Resin particles containing the inorganic color pigment according to the above item 6 and / or the baked inorganic color pigment according to the above item 10 in a ratio of 0.5 to 10%.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION The inorganic white pigment according to the present invention comprises:
ZrO ₂ , SiO ₂ , HfO ₂ and TiO ₂ the first component and the second component such as Na ₂ O specific weight ratio (first component: second component = 60
~ 90: 40 ~ 10%) is a synthetic pigment. The form may be a powder, or a granular or granular sintered body.

The first component of the pigment according to the invention is based on the total weight of the synthetic pigment ZrO ₂ 35-65%, SiO ₂ 5-35.
%, HfO ₂ 3 to 20% and TiO ₂ 5 to 30%. The composition of the first component is more preferably about 40 to 60% ZrO _2, about 10 to 30% SiO _2, about _{8 to} 20% HfO ₂ and about _{8 to} 20% TiO ₂ .

The second component of the pigment according to the invention is Na ₂ O, K ₂
O, Li ₂ O, Rb ₂ O, MgO, CaO, SrO, BaO, Al ₂ O ₃ , P ₂ O ₅ , V ₂
O ₅ , NbO, TaO, CeO ₂ , SnO ₂ , MoO, WO ₃ , TlO and Bi ₂ O ₃
It consists of at least one selected from the group consisting of. As the second component, Al ₂ O ₃ , CeO ₂ , CaO, P ₂ O ₅ , V
₂ O ₅ , NbO, TaO, SnO ₂ , MoO, WO _{3 and the} like are more preferable.

The powdery inorganic white pigment according to the present invention is uniformly mixed in a ratio of the former: the latter = 60 to 90%: 40 to 10%, with the total weight of the first component and the second component being 100%. Can be obtained.

The respective oxides constituting the first component and the second component, in order to enable uniform dispersion in the powder,
It is preferably particles or powder having an average particle size of 100 μm or less, and further considering the practical viewpoint, it is more preferably 50 μm or less, and particles or fine powder having an average particle size of 15 to 0.5 μm. The body is particularly preferred. In each oxide particle, it is preferable that the content of coarse particles that are more than twice the average particle diameter and fine particles that are less than 1/2 the average particle diameter be 5% or less. In the present invention, the “average particle size” means a value measured by a particle size measuring device using a laser diffraction / scattering method.

The powdery inorganic white pigment according to the present invention is a natural radionuclide (uranium, thorium) derived from raw materials (for example, ZrO ₂ production raw material, HfO ₂ production raw material, CeO ₂ production raw material, etc.). May be contained in trace amounts. The powdery inorganic white pigment containing such an ultraweak radioactive substance exhibits an excellent ability to generate negative ions.

Alternatively, in addition to the first component and the second component, the powdery inorganic white pigment according to the present invention contains an ultraweak radioactive oxide containing at least one of lanthanoids and actinoids containing a natural radioactive element. By uniformly blending within the limit, a predetermined negative ion generating ability can be imparted. The source of such oxides of lanthanoids or actinides is not particularly limited, and various minerals such as monazite, xenotime, and bastnezite, or processed products thereof can be mentioned. The amount of the compound is such that the radioactive intensity in the synthetic pigment is
It is preferable to adjust the radioactivity so that it does not exceed 370 Bq / g, which is not subject to legal regulations such as those concerning the regulation of nuclear source materials and nuclear reactors. Further, when the synthetic pigment according to the present invention is used for manufacturing tiles, porcelains, daily necessities, etc., it is desirable to control the radioactivity in the synthetic pigment to 74 Bq / g or less. The particle size of the ultraweak radioactive oxide is also appropriately selected according to the application, but by uniformly dispersing it in the basic composition consisting of the first component and the second component, negative ions can be efficiently generated. At the same time, in order not to reduce the whiteness of the synthetic white pigment, it is preferably about 0.1 to 10 μm, more preferably about 0.5 to 2 μm.

Further, by mixing one or more coloring metal oxides with the powdery inorganic white pigment according to the present invention, an inorganic coloring pigment can be obtained. Such metal oxides include Fe ₂ O ₃ , Cr ₂ O ₃ , MnO, CoO and Ni.
Examples thereof include O and CuO. The amount of the color-forming metal oxide to be used alone or in combination of two or more can be appropriately selected depending on the type, the desired color, etc., but the total weight of the first component and the second component is As a standard, it is usually about 0.5 to 3%, preferably about 1 to 3%. When these metal oxides are used in appropriate combination, the color of the pigment can be adjusted arbitrarily. For example, when Fe ₂ O ₃ is blended alone, a pink color pigment is obtained regardless of firing / non-firing, and when Cr ₂ O ₃ is blended alone,
After all, a green color pigment can be obtained regardless of firing / non-firing. On the other hand, when CoO is blended alone, a blue color pigment is obtained by firing, and Fe ₂ O ₃ and Cr ₂
When blended together with O ₃ , a brown pigment is obtained by firing, and when blended together with Fe ₂ O ₃ , Cr ₂ O ₃ and CoO, a black pigment is obtained by firing. . Also, Cr
_{When 2} O ₃ and CoO are combined together, a peacock blue pigment is obtained by firing.

The powdery inorganic pigment according to the present invention can be easily handled and its characteristics can be further stabilized or strengthened by adopting the form of a powdery fired body or a granulated sintered body. For example, in the case of white pigments and colored pigments, chemical stability (acid resistance, alkali resistance, chemical resistance, moisture resistance, weather resistance, etc.) is obtained by firing or sintering.
And the discoloration resistance is improved. In the case of a pigment having a negative ion generating ability, the negative ion generating ability is further increased.

The inorganic pigment fired product (powder fired product and granulated sintered product) according to the present invention can be produced by a conventional method in the art. For example, the powdered inorganic pigment according to the present invention is subjected to wet grinding in an aqueous medium using a ball mill, a vibration mill, etc., followed by drying and firing (usually 600 to 1500 ° C
, More preferably about 700 to 1300 ° C.), surface treatment, washing with water, filtration, drying, hammer mill, dry milling with a jet mill, etc. be able to. Note that the processing methods listed here are merely examples, and it is possible to adopt other processing methods or a combination of other processing methods.

The particle size of the powdery inorganic pigment calcined product is preferably 100 μm or less in average particle size, more preferably 50 μm or less in average particle size, and more practical as in the case of the unsintered powder. Considering the viewpoint, the average particle size is 15 to 0.5.
It is particularly preferable that the thickness is about μm. Also in the calcined particles, the content of coarse particles exceeding twice the average particle diameter and fine particles below 1/2 of the average particle diameter is preferably 5% or less.

In the present invention, "powder powder"
The term "powdered product" refers to a powdery product obtained by directly firing a powdery mixed raw material.

The "granulated sintered body" refers to a granular or granular product obtained by granulating a powdery mixed raw material according to a conventional method and then sintering it. The particle size of the granulated sintered body may be appropriately selected according to the application, but is usually in the range of about 0.5 to 10 mm.

Further, the powdery inorganic white pigment or the powdered inorganic coloring pigment according to the present invention can be vitrified by heating at a temperature of about 1400 ° C. to 1800 ° C., melting and cooling. This white or colored glass material is
If necessary, the particles may be crushed and classified into glass particles having a predetermined average particle size (for example, usually 100 μm or less, more preferably 50 μm or less, and further preferably about 15 to 0.5 μm). Vitrification and accompanying pulverization, classification and the like can be performed in the same manner as in known glass manufacturing methods.

Further, in the present invention, the powdery inorganic white pigment, powdery inorganic color pigment, inorganic white pigment fired body and sintered body, inorganic color pigment fired body and sintered body obtained as described above, It is also possible to prepare a resin sheet containing at least one of a white glass material and a colored glass material as a filler. The content of the filler in the resin sheet is the same as that of the known filler-containing resin sheet, and can be appropriately determined according to the type of resin, the properties required for the resin sheet, and the like.

Alternatively, the powdery inorganic white pigment, the powdery inorganic coloring pigment, the inorganic white pigment fired body and the sintered body, the inorganic colored pigment fired body and the sintered body, the white glass material and the coloring obtained as described above. At least of glass material
It is also possible to make one kind into fine particles of about 10 μm or less, and then mix it with a molten resin and pelletize it.

[0023]

INDUSTRIAL APPLICABILITY According to the present invention, an inorganic substance in the form of a powder or a sintered body having excellent chemical stability (acid resistance, alkali resistance, chemical resistance, humidity resistance, weather resistance, etc.) and discoloration resistance is obtained. A white pigment can be obtained.

Furthermore, according to the present invention, it is possible to obtain a color pigment in the form of a powder or a sintered body in which a coloring component is mixed with the above inorganic white pigment.

When the inorganic pigment according to the present invention contains a weak radioactive material having a radioactivity intensity below the allowable limit,
Exhibits excellent negative ion generation effect.

When the inorganic pigment according to the present invention is fired, sintered or vitrified, the chemical stability, discoloration resistance, negative ion generating ability and the like are further improved.

The inorganic pigment according to the present invention is used in ceramics, building materials,
It is extremely useful in a wide range of fields such as paints, fibers, metals, resins, wood, papermaking, cosmetics and pharmaceuticals.

[0028]

[Examples] The following is a description of Examples to further clarify the features of the present invention. Example 1 The following first component and second component adjusted in advance to have an average particle size of 50 μm or less in a predetermined ratio. (The amount of each oxide is shown as "%" when the total weight of the first component and the second component is 100%)
Was uniformly mixed to prepare a powdery inorganic white pigment of the present invention.

In the following examples, only the compositions of the first component and the second component are shown unless otherwise required.

First component: ZrO₂35%, SiO₂15%, HfO₂5%, Ti
O₂twenty five% Second component: Al₂O₃6.8%, CeO₂6%, CaO3%, ThO₂0.2%, Y₂O₃
2%, Pr₆O₁₁1%, Yb₂O₃1% Example 2 First component: ZrO₂40%, SiO₂5%, HfO₂20%, TiO₂20% Second component: Al₂O₃3.7%, Ce₂O6%, ThO₂0.2%, Y₂O₃1%, Gd₂
O₃1%, MgO2%, U₃O₈0.1%, Rb₂O1% Example 3 First component: ZrO₂45%, SiO₂5%, HfO₂15%, TiO₂Ten% Second component: Al₂O₃9%, Ce₂O6%, P₂O_Five4%, CaO3%, Y₂O₃1%,
Pr₆O₁₁1%, Bi₂O₃1%, Eu₂O₃1% Example 4 First component: ZrO₂50%, SiO₂10%, HfO₂10%, TiO₂Ten% Second component: Al₂O₃15.9%, P₂O_Five2%, K₂O1%, ThO₂0.1%, MgO
1% Example 5 First component: ZrO₂55%, SiO₂15%, HfO₂5%, TiO₂Five% Second component: Al₂O₃21%, Gd₂O₃1%, Eu₂O₃1% Example 6 First component: ZrO₂60%, SiO₂10%, HfO₂5%, TiO₂Five% Second component: Al₂O₃15%, La₂O₃1%, Nd₂O₃1%, MgO1%, Dy₂O₃
1% Example 7 First component: ZrO₂65%, SiO₂5%, HfO₂10%, TiO₂Five% Second component: Al₂O₃3.9%, Ce₂O4%, CaO1%, SnO₂1%, Na₂O2
%, U₃O₈0.1% Example 8 In the composition of Example 1, CeO₂Part of 6% Fe₂O₃2%
By replacing, a pink color pigment was obtained. Example 9 In the composition of Example 3, Al₂O₃Part of 9% is replaced by MnO 1%
By doing so, a light brown color pigment was obtained. Example 10 In the composition of Example 4, Al₂O₃Part of 15.9% with CoO 1%
By substituting, a green color pigment was obtained. Example 11 In the composition of Example 5, Al₂O₃21% of part is Fe₂O₃At 2%
By substituting, a pink color pigment was obtained. Example 12 First component: ZrO₂35%, SiO₂15%, HfO₂5%, TiO₂twenty five% Second component: Al₂O₃9.7%, La₂O₃3%, SnO₂2%, ThO₂0.1%, Y₂
O₃2%, Sm₂O₃0.5%, Eu₂O₃0.5%, Tb₂O₃1%, Au₂O0.2% Example 13 First component: ZrO₂40%, SiO₂10%, HfO₂5%, TiO₂Five% Second component: Al₂O₃13%, Ce₂O9%, CaO4%, La₂O₃2%, K₂O3
%, Nd₂O₃1%, SnO₂3%, Y₂O₃2%, MoO₂3% Example 14 In the composition of Example 13, Ce₂O9% part of Fe₂O₃1%
And Cr₂O₃By substituting 1%, brown-colored face
Got paid. Example 15 First component: ZrO₂45%, SiO₂5%, HfO₂15%, TiO₂Ten% Second component: Al₂O₃12.4%, CaO3%, Nd₂O₃2%, Th₂O0.1%, Pr
₆O₁₁1.5%, MoO₂1%, Dy ₂O₃1%, Tb₂O₃1%, Er₂O₃2% Example 16 First component: ZrO₂50%, SiO₂10%, HfO₂10%, TiO₂Ten% Second component: Al₂O₃11.7%, CeO₂1%, Nd₂O₃1%, Na₂O2%, Pr₆
O₁₁1%, Gd₂O₃1%, Dy₂O ₃1%, U₃O₈0.1%, Ho₂O₃1% Example 17 First component: ZrO₂55%, SiO₂5%, HfO₂5%, TiO₂Five% Second component: Al₂O₃12.9%, CeO₂3%, CaO4%, La₂O₃2%, SnO₂
3%, Pr₆O₁₁1%, Gd₂O₃1%, MO₂1%, U₃O₈0.1%, SrO2% Example 18 First component: ZrO₂60%, SiO₂10%, HfO₂5%, TiO₂Five% Second component: Al₂O₃11.9%, CeO₂2%, La₂O₃2%, SnO₂2%, Y₂O
₃1%, Gd₂O₃1%, U₃O₈0.1% Example 19 First component: ZrO₂65%, SiO₂5%, HfO₂10%, TiO₂Ten% Second component: Al₂O₃7%, CeO₂1%, SnO₂1%, Yb₂O₃1%

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) C09C 3/04 C09C 3/04 (72) Inventor Yugo Noda 13-1 Aobaokakita, Suita City, Osaka Prefecture 504 No. F-term (reference) 4F071 AA01 AB18 AB26 AF34 BC01 4G062 AA10 AA15 BB01 CC08 DA03 DA04 DA05 DB01 DB02 DB03 dB04 DB05 DC01 DD01 DD02 DD03 DD04 DD05 DE01 DF01 EA01 EA02 EA03 EA04 EA05 EB01 EB02 EB03 EB04 EB05 EC01 EC02 EC03 EC04 EC05 ED01 ED02 ED03 ED04 ED05 EE01 EE02 EE03 EE04 EE05 EF01 EF02 EF03 EF04 EF05 EG01 EG02 EG03 EG04 EG05 FA01 FB02 FB03 FC05 FC06 FD01 FE01 FE02 FE03 FE04 FE05 FF01 FF02 FF03 FF04 FF05 FG01 FG02 FG03 FG04 FG05 FH01 FH02 FH03 FH04 FH05 FJ01 FK01 FL01 FL02 FL03 FL04 FL05 GA01 GB01 GC01 GD01 GE01 HH01 HH02 HH03 HH05 HH07 HH08 HH09 HH11 HH13 HH15 HH17 HH18 HH20 JJ01 JJ03 JJ05 JJ07 JJ10 KK01 KK03 KK05 KK0 7 KK10 MM13 NN08 NN34 NN40 4J002 AA001 DE057 DE067 DE077 DE087 DE096 DE097 DE136 DE147 DJ016 FD096 FD097 4J037 AA08 AA09 AA18 AA22 EE26 EE28

Claims (20)

[Claims] (1) (1) ZrO ₂ 35 to 65%, SiO ₂ 5 to 35%, HfO ₂ 3 to ₂
The first component consisting of 0% and TiO ₂ 05-30% and (2) Na ₂ O, K
₂ O, Li ₂ O, Rb ₂ O, MgO, CaO, SrO, BaO, Al ₂ O ₃ , P ₄ O ₁₀ ,
V ₂ O ₅ , NbO, TaO, CeO ₂ , SnO ₂ , MoO, WO ₃ , TlO and Bi ₂
At least one of the second component selected from the group consisting of O ₃ , the weight ratio of the first component and the second component is 60 to 90%: 40.
Inorganic white pigment characterized by being ~ 10%. 2. The weight ratio of the first component to the second component is 65 to 85.
%: 35 to 15%, wherein the inorganic white pigment according to claim 1. 3. The inorganic white pigment according to any one of claims 1 and 2, which contains an extremely weak radioactive component in an amount exhibiting a radioactivity intensity that does not exceed a legally controlled limit. 4. The inorganic white pigment according to claim 1, wherein the average particle size of each constituent is 100 μm or less. 5. The average particle size of the ultra-weak radioactive component is 0.1-10.
The inorganic white pigment according to claim 3, which is in the range of μm. 6. The inorganic white pigment according to claim 1, wherein Fe ₂ O ₃ , Cr ₂ O ₃ , MnO, based on the total weight of the first component and the second component, 0.5 to 3 at least one coloring component selected from the group consisting of CoO, NiO and CuO
An inorganic coloring pigment blended in a ratio of%. (1) ZrO ₂ 35 to 65%, SiO ₂ 5 to 35%, HfO ₂ 3 to ₂
The first component consisting of 0% and TiO ₂ 05-30% and (2) Na ₂ O, K
₂ O, Li ₂ O, Rb ₂ O, MgO, CaO, SrO, BaO, Al ₂ O ₃ , P ₂ O ₅ , V
₂ O ₅ , NbO, TaO, CeO ₂ , SnO ₂ , MoO, WO ₃ , TlO and Bi ₂ O
The second component consisting of at least one selected from the group consisting of ₃ , the weight ratio of the first component and the second component is 60 to 90.
%: 40 to 10%, and an average particle diameter is 100 μm or less, an inorganic white pigment fired body. 8. The weight ratio of the first component and the second component is 65 to 85.
%: 35 to 15%, The inorganic white pigment fired product according to claim 7. 9. The fired inorganic white pigment according to any one of claims 7 to 8, which contains an ultraweak radioactive component in an amount less than the legally controlled limit amount. 10. 0.5% of at least one coloring component selected from the group consisting of Fe ₂ O ₃ , Cr ₂ O ₃ , MnO, CoO, NiO and CuO based on the total weight of the first component and the second component. The inorganic coloring pigment calcination object according to any one of claims 7 to 9 which contains -3%. 11. (1) ZrO ₂ 35-65%, SiO ₂ 5-35%, HfO ₂ 3
~ 20% and TiO ₂ 05 ~ 30% first component and (2) Na
₂ O, K ₂ O, Li ₂ O, Rb ₂ O, MgO, CaO, SrO, BaO, Al ₂ O ₃ , P _{2
O 5, V 2 O 5,} NbO, TaO, CeO 2, SnO 2, MoO, and a second component consisting of at least one selected from the group consisting of WO _3, TlO and Bi ₂ O _3, the weight ratio 60 A method for producing an inorganic white pigment fired body, which comprises uniformly mixing the mixture at a rate of 90%: 40 to 10% and then firing the obtained mixture at 800 to 1500 ° C. 12. The method for producing an inorganic white pigment according to claim 11, wherein the calcined product contains an ultraweak radioactive component having a radioactivity intensity lower than the legally controlled limit. 13. The method for producing a fired body of inorganic white pigment according to claim 11, wherein the mixture is granulated prior to firing. (1) ZrO ₂ 35 to 65%, SiO ₂ 5 to 35%, HfO ₂ 3
~ 20% and TiO ₂ 05 ~ 30% first component and first component and (2) Na ₂ O, K ₂ O, Li ₂ O, Rb ₂ O, MgO, CaO, SrO, BaO, A
l ₂ O ₃ , P ₂ O ₅ , V ₂ O ₅ , NbO, TaO, CeO ₂ , SnO ₂ , MoO, WO ₃ ,
After uniformly mixing the second component consisting of at least one selected from the group consisting of TlO and Bi ₂ O ₃ in a weight ratio of 60 to 90%: 40 to 10% and melting at 1400 to 1800 ° C. A method for producing a white glass material, which comprises cooling. 15. The white glass material contains an ultra-weak radioactive component exhibiting a radioactivity intensity below a legally controlled limit.
4. The method for producing a white glass material according to item 4. 16. The method for producing a white glass material according to claim 14 or 15, wherein the white glass material after cooling is crushed and the average particle size of the crushed material is adjusted to 100 μm or less. 17. A resin sheet containing the inorganic white pigment according to any one of claims 1 to 5 and 7 to 9 in a proportion of 0.5 to 10%. 18. Resin particles containing the inorganic white pigment according to any one of claims 1 to 5 and 7 to 9 in a proportion of 0.5 to 10%. 19. An inorganic coloring pigment according to claim 6, and
Or or 0.5% of the inorganic color pigment fired body according to claim 10.
Resin sheet containing at a rate of ~ 10%. 20. An inorganic coloring pigment according to claim 6, and
/ Or 0.5 to the inorganic colored pigment fired body according to claim 10.
Resin particles contained at a rate of 10%.