JP2704191B2 - Alumina decorative material - Google Patents
Alumina decorative materialInfo
- Publication number
- JP2704191B2 JP2704191B2 JP1079569A JP7956989A JP2704191B2 JP 2704191 B2 JP2704191 B2 JP 2704191B2 JP 1079569 A JP1079569 A JP 1079569A JP 7956989 A JP7956989 A JP 7956989A JP 2704191 B2 JP2704191 B2 JP 2704191B2
- Authority
- JP
- Japan
- Prior art keywords
- decorative material
- alumina
- lab
- color
- sintered body
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は、酸化アルミニウムを主成分とするアルミナ
質装飾材料に関するものである。Description: TECHNICAL FIELD The present invention relates to an alumina decorative material containing aluminum oxide as a main component.
（従来の技術） 従来の酸化アルミニウム（Al2O3）を主成分とする装
飾材料は、単結晶ではサファイア，ルビー等に代表され
るように多数存在し、多結晶体でも近年数多くの装飾材
料が作られている。(Conventional technology) There are many conventional decorative materials mainly composed of aluminum oxide (Al 2 O 3 ) as represented by sapphire, ruby and the like in single crystals, and many decorative materials in recent years have been polycrystalline. Is made.
しかし、これらの装飾材料は、Al2O3中にNi,Cr,Co等
を固溶させて発色させたものである。However, these decorative materials are formed by dissolving Ni, Cr, Co, etc. in Al 2 O 3 to form a color.
このようにAl2O3に、ある種の物質を固溶させると、
色調を無限に変化させることができるが、その多結晶体
は透光感がないため、プラスチックに似た光沢で高級感
がなかった。As described above, when a certain kind of substance is dissolved in Al 2 O 3 ,
Although the color tone can be changed indefinitely, the polycrystal has no translucency, so it has a gloss similar to that of plastic and has no luxury.
（発明が解決しようとする課題） 上記従来のように、Al2O3にある種の原料を固溶させ
る手段では、色調に深味がなく、高級感がなかった。(Problems to be Solved by the Invention) As described above, the means for dissolving a certain kind of raw material in Al 2 O 3 does not have a rich color tone and lacks a sense of quality.
また、美しい表面を長く保つため、高い硬度を有する
ことが必要であるが、従来の装飾材料では、Crなど一部
の元素を除いて、添加物により硬度が低下する傾向にあ
った。Further, in order to maintain a beautiful surface for a long time, it is necessary to have a high hardness. However, in a conventional decorative material, except for some elements such as Cr, the hardness tends to decrease due to additives.
（発明の目的） そこで、本発明は、深味のある紫色や真珠のような光
沢が発揮でき、しかも硬度が高くスクラッチ（ひっかき
傷）に対する抵抗があり、美しい光輝を長期に亘って保
持することができるアルミナ質装飾材料を提供するにあ
る。(Objects of the Invention) Accordingly, the present invention can exhibit a deep purple or pearl-like luster, and has high hardness and resistance to scratches (scratches), and can maintain a beautiful glitter for a long period of time. To provide an alumina decorative material.
（課題を解決するための手段） 上記目的を達成するための本発明の構成を説明する。(Means for Solving the Problems) The configuration of the present invention for achieving the above object will be described.
すなわち、本発明のアルミナ質装飾材料は、まず第１
に、LaB6（ホウ化ランタン）0.1〜45体積％、残部Al2O3
（酸化アルミニウム）および不可避不純物を焼結一体と
してなるアルミナ質装飾材料である。That is, the alumina-based decorative material of the present invention first
0.1% to 45% by volume of LaB 6 (lanthanum boride), the balance being Al 2 O 3
(Aluminum oxide) and unavoidable impurities are sintered alumina-based decorative materials.
前記LaB6が0.1体積％（後記表１のNo.1参照）未満に
なると色が淡白くなり、50体積％（表１のNo.8参照）を
こえると黒色化するので、0.1〜45体積％が望ましく、
特に色調は３〜10％で最もあざやかな紫色となり、真珠
状光沢を発揮する。The LaB 6 is color Nari rather bland goes below 0.1% by volume (No.1 see Table 1 below), since the blackening exceeds 50% by volume (see No.8 of Table 1), from 0.1 to 45 volume % Is desirable,
In particular, the color tone becomes the most vivid purple at 3 to 10%, and exhibits pearly luster.
また、前記第１の組成にMgO、SiO2の少なくとも一種
を添加してアルミナ質装飾材料を得ることもできる。こ
のMgO、SiO2はAl2O3に対し焼結助剤として作用し、焼結
体の密度向上に伴い焼結体の透明感を更に高めることが
できる。Further, an alumina-based decorative material can be obtained by adding at least one of MgO and SiO 2 to the first composition. MgO and SiO 2 act as sintering aids for Al 2 O 3 , and can further enhance the transparency of the sintered body as the density of the sintered body increases.
さらに、前述の所定比の原料混合後に、所望によりプ
レス成形等の公知の成形方法で任意の形状に成形したの
ち、1500〜2000℃の不活性雰囲気で焼成する。Further, after mixing the raw materials at the above-mentioned predetermined ratio, the mixture is molded into an arbitrary shape by a known molding method such as press molding if desired, and then fired in an inert atmosphere at 1500 to 2000 ° C.
この焼成温度が、1500℃未満になると緻密な焼結体の
粒径が得られず、2000℃をこえるとカーボンとの反応が
激しくなり、1500〜2000℃が適温である。If the sintering temperature is lower than 1500 ° C., a dense particle size of the sintered body cannot be obtained, and if it exceeds 2000 ° C., the reaction with carbon becomes violent, and 1500 to 2000 ° C. is an appropriate temperature.
焼成手段としては、真空焼成或いはホットプレス焼成
等が採用されるが、特に上記の焼成方法によって得られ
た焼結体を熱間静水圧プレス焼成することによって、気
孔、ボイドのない表面活性及び光沢に優れた装飾用材料
を得ることが出来る。As the firing means, vacuum firing or hot press firing is employed. In particular, the sintered body obtained by the above firing method is subjected to hot isostatic press firing to provide pore-free, void-free surface activity and gloss. It is possible to obtain an excellent decorative material.
なお、添加するLaB6の粒径は、0.1〜100μｍが望まし
い。すなわち、0.1μｍ未満では焼結がむづかしく、100
μｍをこえるとAl2O3にクラックが発生し、最適は0.5〜
10μｍ程度である。The particle size of LaB 6 to be added is preferably 0.1 to 100 μm. In other words, if it is less than 0.1 μm, sintering is difficult,
If it exceeds μm, cracks occur in Al 2 O 3 , and the optimum is 0.5 to
It is about 10 μm.
さらに、LaB6は、薄片状になるほど真珠状光沢があざ
やかになる。Further, LaB 6 becomes more pearly glossy as it becomes flaky.
（作用） 上記アルミナ質装飾材料は、添加物によりAl2O3を発
色させるのではなく、Al2O3とLaB6の界面の発色を利用
している。(Function) The alumina-based decorative material uses color development at the interface between Al 2 O 3 and LaB 6 instead of coloring Al 2 O 3 with additives.
このため、装飾材料に入射した光は、Al2O3とLaB6の
界面で乱反射し、深味のある紫色に発色する。Therefore, the light incident on the decorative material is irregularly reflected at the interface between Al 2 O 3 and LaB 6 , and develops a deep purple color.
また、LaB6の添加量を適切に選択することによって真
珠のような光沢を得ることができる。In addition, a pearl-like luster can be obtained by appropriately selecting the amount of LaB 6 to be added.
さらに、LaB6は高い硬度を有し、装飾材料自体はスク
ラッチ（ひっかき傷）に対する抵抗が高くなり、美しい
光沢をいつまでも保持できる。Furthermore, LaB 6 has a high hardness, and the decorative material itself has a high resistance to scratches and can maintain a beautiful luster forever.
（実施例） 次に、実施例について述べる。(Example) Next, an example is described.
表１のNo.2〜7,9および10に示すように、Al2O3,LaB6
およびその他の添加物を所定量調合し、ボールミルで24
時間混合する。 As shown in Nos. 2 to 7, 9 and 10 in Table 1, Al 2 O 3 , LaB 6
And other additives in a predetermined amount, and
Mix for hours.
得られた原料を乾燥し、させに溶剤と、バインダーを
添加してよく混合する。このバインダーは脱バインダー
工程後カーボンが残らないものを選択する。混合後よく
乾燥させ、プレス用原料とする。The obtained raw material is dried, and a solvent and a binder are added thereto and mixed well. This binder is selected so that no carbon remains after the debinding step. After mixing, it is thoroughly dried to obtain a raw material for pressing.
この原料をホットプレス装置でホットプレス（1750℃
×1H、300kg/cm2）を行なう。This raw material is hot-pressed (1750 ° C
× 1H, 300kg / cm 2 ).
または、アルゴンガス雰囲気中、1800℃で焼成を行な
う。Alternatively, firing is performed at 1800 ° C. in an argon gas atmosphere.
上記条件で、ボイドが残留している試料については、
再び1800℃,2000kg/cm2のアルゴンガス中で熱間静水圧
プレスを行なう。Under the above conditions, for the sample with voids remaining,
Hot isostatic pressing is again performed in argon gas at 1800 ° C. and 2000 kg / cm 2 .
試料は上記工程でφ20mm,厚さ5mmのタブレットを作っ
た。As a sample, a tablet having a diameter of 20 mm and a thickness of 5 mm was prepared in the above process.
この試料は表面を研磨したあと、６μｍのダイヤモン
ド砥粒でラッピングし、さらに１μｍのダイヤモンド砥
粒でポリッシングした。After polishing the surface, this sample was wrapped with 6 μm diamond abrasive grains and further polished with 1 μm diamond abrasive grains.
得られた試料は、目視で色調を検査し、ビッカース硬
度計で硬度を測定した。The color of the obtained sample was visually inspected, and the hardness was measured with a Vickers hardness tester.
上記の表１でわかるように、本例のものは紫色系統に
色調を有し、従来品に比し硬度も向上していることが明
白である。As can be seen from Table 1 above, it is clear that this example has a purple color tone and has improved hardness as compared with the conventional product.
（発明の効果） 以上のように、本発明のアルミナ質装飾材料は、添加
物によりAl2O3を発色させるのではなく、Al2O3とLaB6の
界面の発色を利用しているので、装飾材料に入射した光
は、Al2O3とLaB6の界面で乱反射し、深味のある紫色に
発色し、LaB6の添加量を適切に選択することによって真
珠のような光沢を得ることができ、しかもLaB6は高い硬
度を有し、装飾材料自体はスクラッチに対する抵抗が高
くなり、美しい光沢を長期に亘って保持することができ
る。(Effect of the Invention) As described above, the alumina-based decorative material of the present invention utilizes the coloring of the interface between Al 2 O 3 and LaB 6 instead of coloring Al 2 O 3 with additives. The light incident on the decorative material is irregularly reflected at the interface between Al 2 O 3 and LaB 6 and develops a deep purple color. By appropriately selecting the amount of LaB 6 to obtain a pearly luster In addition, LaB 6 has high hardness, the decorative material itself has high resistance to scratches, and can maintain beautiful luster over a long period of time.
Claims (3)
残部Al2O3（酸化アルミニウム）および不可避不純物を
焼結一体としてなるアルミナ質装飾材料。1. LaB 6 (lanthanum boride) 0.1 to 45% by volume,
Alumina decorative material that integrates the remaining Al 2 O 3 (aluminum oxide) and unavoidable impurities into a sintered body.
いる請求項１記載のアルミナ質装飾材料。2. The alumina decorative material according to claim 1, wherein at least one of MgO and SiO 2 is added.
度で、不活性雰囲気で焼成した請求項１または２記載の
アルミナ質装飾材料。3. The alumina-based decorative material according to claim 1, wherein the raw materials having a predetermined ratio are mixed and then fired at a temperature of 1500 to 2000 ° C. in an inert atmosphere.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1079569A JP2704191B2 (en) | 1989-03-30 | 1989-03-30 | Alumina decorative material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1079569A JP2704191B2 (en) | 1989-03-30 | 1989-03-30 | Alumina decorative material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02255565A JPH02255565A (en) | 1990-10-16 |
| JP2704191B2 true JP2704191B2 (en) | 1998-01-26 |
Family
ID=13693635
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1079569A Expired - Fee Related JP2704191B2 (en) | 1989-03-30 | 1989-03-30 | Alumina decorative material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2704191B2 (en) |
-
1989
- 1989-03-30 JP JP1079569A patent/JP2704191B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02255565A (en) | 1990-10-16 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |