JPH0826722A - Inorganic powdery mixture - Google Patents
Inorganic powdery mixtureInfo
- Publication number
- JPH0826722A JPH0826722A JP6180667A JP18066794A JPH0826722A JP H0826722 A JPH0826722 A JP H0826722A JP 6180667 A JP6180667 A JP 6180667A JP 18066794 A JP18066794 A JP 18066794A JP H0826722 A JPH0826722 A JP H0826722A
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- JP
- Japan
- Prior art keywords
- powder
- inorganic powder
- inorganic
- powder mixture
- mixture according
- 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.)
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- Glanulating (AREA)
- Compositions Of Oxide Ceramics (AREA)
- Oxygen, Ozone, And Oxides In General (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、単結晶用原料、溶射材
用原料、焼結体用原料、多孔体用原料等に用いられる無
機粉末混合物に関する。TECHNICAL FIELD The present invention relates to an inorganic powder mixture used as a raw material for a single crystal, a raw material for a thermal spray material, a raw material for a sintered body, a raw material for a porous body and the like.
【０００２】[0002]
【従来の技術】無機粉末は、単結晶用原料、溶射材用原
料、焼結体用原料、多孔体用原料等に広く用いられてい
る。従来の無機粉末は、破砕法で製造されるため、形状
や粒度分布が不均一で、単結晶製造あるいは溶射等に使
用される原料として、流動性が悪く、安定な供給が困難
で、充填密度が低い等の問題があった。BACKGROUND OF THE INVENTION Inorganic powders are widely used as raw materials for single crystals, raw materials for thermal spraying materials, raw materials for sintered bodies, raw materials for porous bodies, and the like. Since conventional inorganic powders are manufactured by a crushing method, they have uneven shape and particle size distribution, and have poor fluidity as a raw material used for single crystal production or thermal spraying, and difficult to supply stably, and packing density There was a problem such as low.
【０００３】これらの問題を克服するために、ホッパー
の傾きやノズルの径を最適化する等装置の形状の改善を
行ったり、撹拌、振動、加圧等、外部から力をかけるな
ど強制的に流動させていた。しかしながら、この様な方
法では装置が複雑で高価になるという問題があった。In order to overcome these problems, the shape of the device is improved by optimizing the inclination of the hopper and the diameter of the nozzle, and external force such as stirring, vibration and pressure is forced to be applied. It was flowing. However, such a method has a problem that the device is complicated and expensive.
【０００４】また、流動性を向上させるために数百ミク
ロン〜数ミリの大きさに造粒した粒子が用いられている
が、この方法では流動性がよくなる反面、充填密度が低
くなるという問題があった。Further, in order to improve the fluidity, particles agglomerated to a size of several hundreds of microns to several millimeters are used, but this method has a problem that the fluidity is improved but the packing density is lowered. there were.
【０００５】流動層の流動性を改良する方法の一つとし
て、微粉を混入させることが化学工学、３８巻（１９７
４）、２９頁に記されているが、粒度分布改善による流
動性の改善が目的であった。As one of the methods for improving the fluidity of a fluidized bed, mixing fine powder is described in Chemical Engineering, Vol. 38 (197).
4), page 29, the purpose was to improve fluidity by improving the particle size distribution.
【０００６】[0006]
【発明が解決しようとする課題】そこで、本発明の目的
は、流動性が高く、安定な供給が可能で充填密度の高い
無機粉末混合物を提供することにある。SUMMARY OF THE INVENTION It is, therefore, an object of the present invention to provide an inorganic powder mixture having high fluidity, stable supply and high packing density.
【０００７】[0007]
【課題を解決するための手段】本発明は次の発明からな
る。 １）数平均粒子径がＤ1 である無機粉末Ａと数平均粒子
径がＤ2 である粉末Ｂとの粉末混合物からなり、Ｄ1 が
０．１μｍ以上３００μｍ以下、Ｄ1 ／Ｄ2 比が１５以
上、無機粉末Ａの１００体積部に対して粉末Ｂが０．０
０１から１５体積部の範囲にあり、該粉末混合物の安息
角が５０゜以下であることを特徴とする無機粉末混合
物。 ２）数平均粒子径がＤ1 である無機粉末Ａの表面に数平
均粒子径がＤ2 である粉末Ｂが付着した粉末混合物から
なることを特徴とする前項１記載の無機粉末混合物。The present invention comprises the following inventions. 1) Inorganic powder A and the number-average particle diameter Number average particle diameter of D 1 is a powder mixture of a powder B is D 2, D 1 is 0.1μm or more 300μm or less, D 1 / D 2 ratio 15 or more, the powder B is 0.0 with respect to 100 parts by volume of the inorganic powder A.
An inorganic powder mixture, which is in the range of 01 to 15 parts by volume and has a repose angle of 50 ° or less. 2) The number-average particle diameter of the inorganic powder mixture of the above 1, wherein the consisting powder mixture having a number average particle diameter was adhered powder B is D 2 on the surface of the inorganic powder A is D 1.
【０００８】３）粉末Ｂが無機粉末であることを特徴と
する前項１または２記載の無機粉末混合物。 ４）無機粉末Ａと粉末Ｂが同一物質であることを特徴と
する前項１、２または３記載の無機粉末混合物。 ５）無機粉末Ａが実質的に破面を有しない球状または多
面体粒子からなることを特徴とする前項１、２または３
記載の無機粉末混合物。3) The inorganic powder mixture as described in 1 or 2 above, wherein the powder B is an inorganic powder. 4) The inorganic powder mixture according to the above 1, 2 or 3, wherein the inorganic powder A and the powder B are the same substance. 5) Inorganic powder A is composed of spherical or polyhedral particles having substantially no fracture surface.
Inorganic powder mixture as described.
【０００９】６）無機粉末Ａがアルミニウム、チタン、
ジルコニウム、シリコンの各々の酸化物、窒化物、炭化
物、ホウ化物、複合酸化物、酸窒化物から選ばれる少な
くとも一つを含む単体粉末または混合粉末で、粉末Ｂが
アルミニウム、チタン、ジルコニウム、シリコンの各々
の酸化物、窒化物、炭化物、ホウ化物、複合酸化物、酸
窒化物、カーボンから選ばれる少なくとも一つを含む単
体粉末または混合粉末であることを特徴とする前項１、
２、３、４または５記載の無機粉末混合物。 ７）無機粉末Ａが酸化アルミニウムまたはイットリウム
アルミニウムガーネット（ＹＡＧ）であることを特徴と
する前項１、２、３、４、５または６記載の無機粉末混
合物。6) The inorganic powder A is aluminum, titanium,
A single powder or a mixed powder containing at least one selected from oxides, nitrides, carbides, borides, complex oxides, and oxynitrides of zirconium and silicon, and powder B of aluminum, titanium, zirconium, and silicon. The above-mentioned item 1, which is a single powder or a mixed powder containing at least one selected from each oxide, nitride, carbide, boride, complex oxide, oxynitride, and carbon.
Inorganic powder mixture according to 2, 3, 4 or 5. 7) The inorganic powder mixture according to the above 1, 2, 3, 4, 5 or 6, wherein the inorganic powder A is aluminum oxide or yttrium aluminum garnet (YAG).
【００１０】８）単結晶用原料である前項１、２、３、
４、５、６または７記載の無機粉末混合物。 ９）溶射材用原料である前項１、２、３、４、５、６ま
たは７記載の無機粉末混合物。 １０）焼結体用原料である前項１、２、３、４、５、６
または７記載の無機粉末混合物。 １１）多孔体用原料である前項１、２、３、４、５、６
または７記載の無機粉末混合物。8) The above-mentioned 1, 2, 3, which are raw materials for single crystals
Inorganic powder mixture according to 4, 5, 6 or 7. 9) The inorganic powder mixture according to the above item 1, 2, 3, 4, 5, 6 or 7, which is a raw material for a thermal spray material. 10) The above-mentioned 1, 2, 3, 4, 5, 6 which is a raw material for a sintered body
Or an inorganic powder mixture as described in 7 above. 11) The above items 1, 2, 3, 4, 5, 6 which are raw materials for porous bodies
Or an inorganic powder mixture as described in 7 above.
【００１１】以下、本発明について詳しく説明する。本
発明の無機粉末混合物は、大きな粒子径を有する無機粉
末Ａと小さな粒子径を有する粉末Ｂとを混合用装置を用
いて混合させることにより、無機粉末Ａの表面に粉末Ｂ
を付着させることにより流動性が著しく改善されたもの
である。The present invention will be described in detail below. The inorganic powder mixture of the present invention is prepared by mixing the inorganic powder A having a large particle size and the powder B having a small particle size by using a mixing device so that the powder B is formed on the surface of the inorganic powder A.
The fluidity is remarkably improved by adhering.
【００１２】無機粉末Ａとしては、流動性の改良を必要
とする全ての無機粉末を用いることができる。例えばア
ルミニウム、チタン、ジルコニウム、シリコン等の各々
の酸化物、窒化物、炭化物、ホウ化物、複合酸化物、酸
窒化物等から選ばれる少なくとも一つを含む単体粉末あ
るいは混合粉末を挙げることができる。ここで無機粉末
Ａの合成方法は特に限定されない。As the inorganic powder A, it is possible to use all the inorganic powders which require improvement in fluidity. For example, a single powder or a mixed powder containing at least one selected from oxides, nitrides, carbides, borides, complex oxides, oxynitrides and the like of aluminum, titanium, zirconium, silicon and the like can be mentioned. Here, the synthesis method of the inorganic powder A is not particularly limited.
【００１３】無機粉末Ａの好ましい具体例としては、酸
化アルミニウムまたはイットリウムアルミニウムガーネ
ット（ＹＡＧ）を挙げることができる。Preferred specific examples of the inorganic powder A include aluminum oxide and yttrium aluminum garnet (YAG).
【００１４】無機粉末Ａの数平均粒子径Ｄ1 は、０．１
μｍから３００μｍ、好ましくは１μｍから３００μｍ
である。無機粉末Ａの数平均粒子径Ｄ1 が０．１μｍ未
満の場合には、それより小さな数平均粒子径Ｄ2 を有す
る粉末Ｂと混合させて低い安息角を有する無機粉末混合
物を得ることは困難であり、実用的ではない。一方、３
００μｍを超える場合は、流動性を改善しなくても安息
角は低い。ここで、無機粉末Ａの数平均粒子径Ｄ1 と粉
末Ｂの数平均粒子径Ｄ2 との比（Ｄ1 ／Ｄ2 ）は１５以
上、好ましくは２０以上、さらに好ましくは５０以上で
ある。Ｄ1 ／Ｄ2 の比が１５未満では５０°以下の安息
角を有する無機粉末混合物を得ることができない。The number average particle diameter D 1 of the inorganic powder A is 0.1
μm to 300 μm, preferably 1 μm to 300 μm
Is. When the number average particle diameter D 1 of the inorganic powder A is less than 0.1 μm, it is difficult to obtain the inorganic powder mixture having a low repose angle by mixing with the powder B having the smaller number average particle diameter D 2. And is not practical. On the other hand, 3
When it exceeds 00 μm, the angle of repose is low without improving the fluidity. Here, inorganic number average ratio of the number average particle diameter D 2 of a particle diameter D 1 and powder B powder A (D 1 / D 2) is 15 or more, preferably 20 or more, more preferably 50 or more. If the D 1 / D 2 ratio is less than 15, an inorganic powder mixture having an angle of repose of 50 ° or less cannot be obtained.
【００１５】無機粉末Ａの粒度分布は特に限定されな
い。粒度分布のシャープな粒子から粒度分布の比較的ブ
ロードな粒子まで、いずれでも用いることができる。ま
た数平均粒子径の異なる２種類以上の粉末を混合させた
ものも用いることができる。The particle size distribution of the inorganic powder A is not particularly limited. Any of particles having a sharp particle size distribution to particles having a relatively broad particle size distribution can be used. Also, a mixture of two or more kinds of powders having different number average particle diameters can be used.
【００１６】無機粉末Ａの形状は、粉砕等で生じた破面
を有していても用いることができるが、実質的に破面を
有しない球状あるいは多面体粒子が好ましい。無機粉末
Ａをより球状に近付けることにより、流動性をより改善
することができる。The inorganic powder A may be used even if it has a fracture surface generated by pulverization or the like, but spherical or polyhedral particles having substantially no fracture surface are preferred. The fluidity can be further improved by bringing the inorganic powder A closer to a spherical shape.
【００１７】粉末Ｂとして用いる粉末は、その数平均粒
子径が無機粉末Ａの１／１５以下であればいかなる粉末
でも用いることができるが、無機粉末が好ましい。例え
ば、アルミニウム、チタン、ジルコニウム、シリコン等
の各々の酸化物、窒化物、炭化物、ホウ化物、複合酸化
物、酸窒化物、またはカーボンから選ばれる少なくとも
一つを含む単体粉末あるいは混合粉末を挙げることがで
きる。As the powder used as the powder B, any powder can be used as long as the number average particle diameter is 1/15 or less of that of the inorganic powder A, but the inorganic powder is preferable. For example, mention may be made of a single powder or a mixed powder containing at least one selected from oxides, nitrides, carbides, borides, complex oxides, oxynitrides, or carbons of aluminum, titanium, zirconium, silicon and the like. You can
【００１８】粉末Ｂの好ましい具体例としては、酸化ア
ルミニウム、遷移アルミナを挙げることができる。Preferred specific examples of the powder B include aluminum oxide and transition alumina.
【００１９】粉末Ｂとしては、最終製品を得るまでに除
去できるもの、化学変化を起こしても最終製品に対して
無害となるもの、残留しても最終製品の特性に影響を与
えないものであればいかなる粉末でも用いることができ
る。ここで、無機粉末Ａと粉末Ｂとは異なる物質でも使
用することができるが、同一物質を混合することが好ま
しい。The powder B may be one that can be removed before the final product is obtained, one that is harmless to the final product even if a chemical change occurs, and one that remains even if it does not affect the properties of the final product. Any powder can be used. Here, although different substances can be used as the inorganic powder A and the powder B, it is preferable to mix the same substance.
【００２０】無機粉末Ａと粉末Ｂとが同一物質である場
合、結晶型が異なっても問題はない。例えば、α−アル
ミナ表面にγ−アルミナを付着させることにより、安息
角の低い無機粉末混合物を得ることができる。When the inorganic powder A and the powder B are the same substance, there is no problem even if the crystal forms are different. For example, by adhering γ-alumina to the surface of α-alumina, an inorganic powder mixture having a low repose angle can be obtained.
【００２１】粉末Ｂの添加量は、無機粉末Ａの体積の１
００体積部に対して、粉末Ｂの体積が０．００１から１
５体積部の範囲、好ましくは０．０１から２体積部の範
囲である。粉末Ｂの体積が０．００１体積部未満の場
合、粉末Ｂの体積が１５体積部を超える場合、いずれも
安息角が５０°を超えるので好ましくない。The addition amount of the powder B is 1 of the volume of the inorganic powder A.
The volume of the powder B is 0.001 to 1 with respect to 00 parts by volume.
It is in the range of 5 parts by volume, preferably in the range of 0.01 to 2 parts by volume. When the volume of the powder B is less than 0.001 part by volume and when the volume of the powder B exceeds 15 parts by volume, the angle of repose exceeds 50 °, which is not preferable.
【００２２】粉末Ｂの粒度分布は特に限定されない。粒
度分布のシャープな粒子から粒度分布の比較的ブロード
な粒子まで、いずれでも用いることができる。また、数
平均粒子径の異なる２種類以上の粉末を混合させたもの
も用いることができる。The particle size distribution of the powder B is not particularly limited. Any of particles having a sharp particle size distribution to particles having a relatively broad particle size distribution can be used. Also, a mixture of two or more kinds of powders having different number average particle diameters can be used.
【００２３】無機粉末Ａと粉末Ｂとを混合する混合装置
は必ずしも限定されず、湿式法、あるいは乾式法が採用
でき、また通常用いている粉砕機、解砕機あるいは混合
機を用いることができる。具体的にはボールミル、振動
ミル、ジェットミル、Ｖ型混合機等を挙げることができ
る。The mixing apparatus for mixing the inorganic powder A and the powder B is not necessarily limited, and a wet method or a dry method can be adopted, and a commonly used crusher, crusher or mixer can be used. Specific examples include a ball mill, a vibration mill, a jet mill, a V-type mixer, and the like.
【００２４】無機粉末Ａの製造工程において、同時に数
平均粒子径が無機粉末Ａの１／１５以下の粉末Ｂが得ら
れるような場合には、無機粉末Ａに粉末Ｂを混合する混
合工程を省略することも可能である。In the manufacturing process of the inorganic powder A, when the powder B having the number average particle size of 1/15 or less of the inorganic powder A is obtained at the same time, the mixing process of mixing the powder B with the inorganic powder A is omitted. It is also possible to do so.
【００２５】無機粉末Ａの製造工程中に、粉砕工程、解
砕工程あるいは混合工程が存在する場合には、それぞれ
の工程の前にあらかじめ粉末Ｂを添加することにより、
流動性を改良した粉末を得ることができる。When a crushing step, a crushing step, or a mixing step is present in the manufacturing process of the inorganic powder A, by adding the powder B in advance before each step,
A powder with improved flowability can be obtained.
【００２６】無機粉末Ａと粉末Ｂとを混合して得られる
無機粉末混合物を焼成することにより、無機粉末Ａと粉
末Ｂとを強固に付着させて付着力を増加させて用いるこ
とも可能である。ここで無機粉末Ａどうしがネックを形
成することがあるので、そのような場合には解砕が必要
となる。By firing the inorganic powder mixture obtained by mixing the inorganic powder A and the powder B, the inorganic powder A and the powder B can be firmly adhered to each other to increase the adhesive force. . Here, since the inorganic powders A may form a neck, crushing is necessary in such a case.
【００２７】得られた無機粉末混合物の安息角は５０゜
以下、より好ましくは４０゜以下、更に好ましくは３０
゜以下である。安息角が５０゜以上では流動性が悪く、
原料としての無機粉末混合物の安定な供給が困難であ
り、また、充填密度が低い等の問題が生じる。The angle of repose of the obtained inorganic powder mixture is 50 ° or less, more preferably 40 ° or less, and further preferably 30.
It is less than °. If the angle of repose is 50 ° or more, the fluidity is poor,
It is difficult to stably supply the inorganic powder mixture as a raw material, and the packing density is low.
【００２８】[0028]
【実施例】次に、本発明を実施例によりさらに詳しく説
明するが、本発明はこれらの実施例に限定されるもので
はない。なお、本発明における各種の測定は次のように
して行った。 １）無機粉末Ａと粉末Ｂの数平均粒子径。 無機粉末ＡのＳＥＭ（走査型電子顕微鏡、日本電子株式
会社製：Ｔ−３００）写真を写し、その写真から８０な
いし１００個の粒子を選び出して画像解析を行い、円相
当径の平均値とその分布を求めた。円相当径とは、面積
が等しい真円の直径に換算した値をいう。無機粉末Ａの
表面に付着した粉末ＢのＳＥＭ写真から、無機粉末Ａと
同様にして円相当径を求めた。 ２）安息角の測定。 安息角は注入法によって測定した。測定には１０〜２０
ｇのサンプルを用い、４２メッシュのふるいを、はけで
掃きながら通し、その後ロート（排出孔径６ｍｍ）を通
して堆積させた。排出孔から粉体が堆積する面までの距
離を１００ｍｍに設定した。角度の読み取りは分度器を
用いた。EXAMPLES Next, the present invention will be described in more detail by way of examples, but the present invention is not limited to these examples. Various measurements in the present invention were performed as follows. 1) Number average particle diameter of the inorganic powder A and the powder B. An SEM (scanning electron microscope, manufactured by JEOL Ltd .: T-300) photograph of the inorganic powder A is photographed, 80 to 100 particles are selected from the photograph, and image analysis is performed. The distribution was calculated. The equivalent circle diameter is a value converted into the diameter of a perfect circle having the same area. From the SEM photograph of the powder B attached to the surface of the inorganic powder A, the equivalent circle diameter was obtained in the same manner as the inorganic powder A. 2) Measurement of the angle of repose. The angle of repose was measured by the injection method. 10 to 20 for measurement
Using a sample of g, a 42 mesh sieve was passed through while sweeping with a brush and then deposited through a funnel (exhaust hole diameter 6 mm). The distance from the discharge hole to the surface on which the powder is deposited was set to 100 mm. A protractor was used to read the angle.
【００２９】３）充填密度の測定。 充填密度は軽装密度として測定した。測定には５０ｍｌ
のメスシリンダーを用いた。仕込んだ重量、タップを行
わない状態での体積それぞれを求め、仕込み重量／体積
を充填密度とした。 ４）粉末Ｂの添加量。 粉末Ｂの重量部とは、無機粉末Ａの重量を１００とした
ときの粉末Ｂの重量のことである。さらに、粉末Ｂの体
積部とは、粉末Ｂの重量部×（無機粉末Ａの密度／粉末
Ｂの密度）から得られる。3) Measurement of packing density. The packing density was measured as the light packing density. 50 ml for measurement
The graduated cylinder of was used. The charged weight and the volume without tapping were calculated, and the charged weight / volume was taken as the packing density. 4) Amount of powder B added. The weight part of the powder B is the weight of the powder B when the weight of the inorganic powder A is 100. Furthermore, the volume part of the powder B is obtained from the weight part of the powder B × (density of the inorganic powder A / density of the powder B).
【００３０】実施例において使用した無機粉末Ａ、粉末
Ｂは次に示すとおりである。 無機粉末Ａ １）α−アルミナＡ（αアルＡと略すことがある）。 遷移アルミナを塩化水素ガス気流中にて焼成して得られ
た多面体のα−アルミナ粉末（住友化学工業株式会社
製、粒子径：１６．１μｍ、密度：３．９９ｇ／ｃ
ｍ3 ）。 ２）α−アルミナＢ（αアルＢと略すことがある）。 遷移アルミナを塩化水素ガス気流中にて焼成して得られ
た多面体のα−アルミナ粉末（住友化学工業株式会社
製、粒子径：４．７μｍ、密度：３．９９ｇ／ｃ
ｍ3 ）。 ３）α−アルミナＣ（αアルＣと略すことがある）。 溶融アルミナ（商品名：ＷＡ、不二見研磨材製、粒子
径：１６．８μｍ、密度３．９９ｇ／ｃｍ3 ）。The inorganic powders A and B used in the examples are as shown below. Inorganic powder A 1) α-alumina A (may be abbreviated as α-Al A). Polyhedral α-alumina powder obtained by firing transition alumina in a hydrogen chloride gas stream (manufactured by Sumitomo Chemical Co., Ltd., particle diameter: 16.1 μm, density: 3.99 g / c)
m 3 ). 2) α-alumina B (may be abbreviated as α-Al B). Polyhedral α-alumina powder obtained by firing transition alumina in a hydrogen chloride gas stream (manufactured by Sumitomo Chemical Co., Ltd., particle diameter: 4.7 μm, density: 3.99 g / c)
m 3 ). 3) α-alumina C (sometimes abbreviated as α-Al C). Fused alumina (trade name: WA, manufactured by Fujimi Abrasives, particle diameter: 16.8 μm, density 3.99 g / cm 3 ).
【００３１】４）イットリウムアルミニウムガーネット
（ＹＡＧと略すことがある）。 遷移アルミナとイットリアの混合物を塩化水素ガス中に
て焼成して得られた多面体ＹＡＧ粉末（住友化学工業株
式会社製、粒子径：８．５μｍ、密度：４．５５ｇ／ｃ
ｍ3 ）。4) Yttrium aluminum garnet (sometimes abbreviated as YAG). Polyhedral YAG powder obtained by firing a mixture of transition alumina and yttria in hydrogen chloride gas (Sumitomo Chemical Co., Ltd., particle size: 8.5 μm, density: 4.55 g / c)
m 3 ).
【００３２】粉末Ｂ １）α−アルミナＤ（αアルＤと略すことがある）。 α−アルミナ（商品名：ＡＫＰ−５０、住友化学工業株
式会社製、粒子径：０．２３μｍ、密度：３．９９ｇ／
ｃｍ3 ）。 ２）α−アルミナＥ（αアルＥと略すことがある）。 遷移アルミナを塩化水素ガス気流中にて焼成し得られた
多面体のα−アルミ製ナ粉末（住友化学工業株式会社
製、粒子径：１．６３μｍ、密度：３．９９ｇ／ｃ
ｍ3 ）。 ３）遷移アルミナ（遷移アルと略すことがある）。 有機アルミニウムの加水分解により合成して得た水酸化
アルミニウムを焼成した遷移アルミナ（商品名：ＡＫＰ
−Ｇ１５、住友化学工業株式会社製、２次粒子径：０．
１μｍ、密度：３．２ｇ／ｃｍ3 ）。遷移アルミナのＢ
ＥＴ比表面積より求めた一次粒子径は０．０１μｍであ
るが、実際に流動性に影響を与える粒子は、一次粒子の
凝集した二次粒子であるため二次粒子径を示した。Powder B 1) α-Alumina D (sometimes abbreviated as α-Al D). α-alumina (trade name: AKP-50, manufactured by Sumitomo Chemical Co., Ltd., particle diameter: 0.23 μm, density: 3.99 g /
cm 3 ). 2) α-alumina E (sometimes abbreviated as α-al E). Polyhedral α-aluminum powder obtained by firing transition alumina in a hydrogen chloride gas stream (manufactured by Sumitomo Chemical Co., Ltd., particle size: 1.63 μm, density: 3.99 g / c)
m 3 ). 3) Transition alumina (sometimes abbreviated as transitional). Transition alumina (commercial name: AKP) obtained by firing aluminum hydroxide obtained by synthesizing organic aluminum by hydrolysis
-G15, manufactured by Sumitomo Chemical Co., Ltd., secondary particle size: 0.
1 μm, density: 3.2 g / cm 3 ). B of transition alumina
The primary particle diameter calculated from the ET specific surface area is 0.01 μm, but the particles that actually affect the fluidity are secondary particles in which the primary particles are aggregated, and thus the secondary particle diameter is shown.
【００３３】実施例１〜７ 無機粉末Ａ（α−アルミナＡ）５０ｇに、粉末Ｂ（遷移
アルミナ）をそれぞれ０．１ｇ（実施例１）、０．２５
ｇ（実施例２）、０．０２５ｇ（実施例３）、０．５ｇ
（実施例４）、０．０１ｇ（実施例５）、１．５ｇ（実
施例６）、２．５ｇ（実施例７）添加して、小型ミル
（石崎電機製作所製、ＳＣＭ−４０Ａ）で３０秒間撹拌
して無機粉末混合物を得た。撹拌後、安息角と充填密度
を測定した。実施例１により得られた無機粉末混合物の
ＳＥＭ写真を図１に示す。実験条件および結果を表１、
２に示す。Examples 1 to 7 Inorganic powder A (α-alumina A) 50 g, powder B (transition alumina) 0.1 g (Example 1), 0.25 respectively
g (Example 2), 0.025 g (Example 3), 0.5 g
(Example 4), 0.01 g (Example 5), 1.5 g (Example 6), 2.5 g (Example 7) were added, and a small mill (SCM-40A manufactured by Ishizaki Electric Co., Ltd.) was used. The mixture was stirred for 2 seconds to obtain an inorganic powder mixture. After stirring, the angle of repose and the packing density were measured. An SEM photograph of the inorganic powder mixture obtained in Example 1 is shown in FIG. Experimental conditions and results are shown in Table 1,
It is shown in FIG.
【００３４】実施例８ 無機粉末Ａ（α−アルミナＡ）を５０ｇ、粉末Ｂ（α−
アルミナＤ）を０．５ｇとした以外は実施例１と同様に
して無機粉末混合物を得た。実験条件および結果を表
１、２に示す。Example 8 50 g of inorganic powder A (α-alumina A) and powder B (α-
An inorganic powder mixture was obtained in the same manner as in Example 1 except that 0.5 g of alumina D) was used. Experimental conditions and results are shown in Tables 1 and 2.
【００３５】実施例９ 無機粉末Ａ（α−アルミナＢ）を５０ｇ、粉末Ｂ（遷移
アルミナ）を０．５ｇとした以外は実施例１と同様にし
て無機粉末混合物を得た。実験条件および結果を表１、
２に示す。Example 9 An inorganic powder mixture was obtained in the same manner as in Example 1 except that 50 g of the inorganic powder A (α-alumina B) and 0.5 g of the powder B (transition alumina) were used. Experimental conditions and results are shown in Table 1,
It is shown in FIG.
【００３６】実施例１０ 無機粉末Ａ（α−アルミナＣ）を５０ｇ、粉末Ｂ（遷移
アルミナ）を０．１ｇとした以外は実施例１と同様にし
て無機粉末混合物を得た。実験条件および結果を表１、
２に示す。Example 10 An inorganic powder mixture was obtained in the same manner as in Example 1 except that 50 g of the inorganic powder A (α-alumina C) and 0.1 g of the powder B (transition alumina) were used. Experimental conditions and results are shown in Table 1,
It is shown in FIG.
【００３７】実施例１１ 無機粉末Ａ（α−アルミナＣ）を５０ｇ、粉末Ｂ（α−
アルミナＤ）を０．２５ｇとした以外は実施例１と同様
にして無機粉末混合物を得た。実験条件および結果を表
１、２に示す。Example 11 50 g of inorganic powder A (α-alumina C) and powder B (α-
An inorganic powder mixture was obtained in the same manner as in Example 1 except that 0.25 g of alumina D) was used. Experimental conditions and results are shown in Tables 1 and 2.
【００３８】実施例１２ 無機粉末Ａ（α−アルミナＡ）５０ｇに、粉末Ｂ（遷移
アルミナ）０．２５ｇを、ジェットミル（日本ニューマ
チック工業株式会社製、ＰＪＭ−１００ＳＰ）（Ｊミル
と略すことがある）を用いて空気圧１ｋｇ／ｃｍ2 、処
理量５．７ｋｇ／時間で混合して無機粉末混合物を得
た。得られた無機粉末混合物の安息角と充填密度を測定
した。実験条件および結果を表１、２に示す。Example 12 0.25 g of powder B (transition alumina) is added to 50 g of inorganic powder A (α-alumina A), jet mill (PJM-100SP manufactured by Nippon Pneumatic Mfg. Co., Ltd.) (abbreviated as J mill). Was mixed at a pneumatic pressure of 1 kg / cm 2 and a treatment rate of 5.7 kg / hour to obtain an inorganic powder mixture. The repose angle and packing density of the obtained inorganic powder mixture were measured. Experimental conditions and results are shown in Tables 1 and 2.
【００３９】実施例１３ 無機粉末Ａ（ＹＡＧ）を３６ｇ、粉末Ｂ（遷移アルミ
ナ）を０．０７２ｇ用い、小型ミルで１分間撹拌して無
機粉末混合物を得た。実験条件および結果を表１、２に
示す。Example 13 An inorganic powder mixture was obtained by using 36 g of inorganic powder A (YAG) and 0.072 g of powder B (transition alumina) and stirring for 1 minute with a small mill. Experimental conditions and results are shown in Tables 1 and 2.
【００４０】比較例１ 無機粉末Ａ（α−アルミナＡ）に粉末Ｂを添加せず、α
−アルミナＡの安息角と充填密度を測定した。実験条件
および結果を表１、２に示す。Comparative Example 1 Powder B was not added to inorganic powder A (α-alumina A), and α
-The repose angle and packing density of Alumina A were measured. Experimental conditions and results are shown in Tables 1 and 2.
【００４１】比較例２ 無機粉末Ａ（α−アルミナＣ）に粉末Ｂを添加せず、α
−アルミナＣの安息角と充填密度を測定した。実験条件
および結果を表１、２に示す。Comparative Example 2 The powder B was not added to the inorganic powder A (α-alumina C), and α
-The angle of repose and packing density of Alumina C were measured. Experimental conditions and results are shown in Tables 1 and 2.
【００４２】比較例３ 無機粉末Ａ（α−アルミナＡ）を５０ｇ、粉末Ｂ（遷移
アルミナ）を０．００２５ｇとした以外は実施例１と同
様にして無機粉末混合物を得た。実験条件および結果を
表１、２に示す。Comparative Example 3 An inorganic powder mixture was obtained in the same manner as in Example 1 except that 50 g of the inorganic powder A (α-alumina A) and 0.0025 g of the powder B (transition alumina) were used. Experimental conditions and results are shown in Tables 1 and 2.
【００４３】比較例４ 無機粉末Ａ（α−アルミナＡ）を５０ｇ、粉末Ｂ（遷移
アルミナ）を１０ｇとした以外は実施例１と同様にして
無機粉末混合物を得た。実験条件および結果を表１、２
に示す。Comparative Example 4 An inorganic powder mixture was obtained in the same manner as in Example 1 except that 50 g of the inorganic powder A (α-alumina A) and 10 g of the powder B (transition alumina) were used. Experimental conditions and results are shown in Tables 1 and 2.
Shown in
【００４４】比較例５ 無機粉末Ａ（α−アルミナＡ）を５０ｇ、粉末Ｂ（α−
アルミナＥ）を０．５ｇとした以外は実施例１と同様に
して無機粉末混合物を得た。実験条件および結果を表
１、２に示す。Comparative Example 5 50 g of inorganic powder A (α-alumina A) and powder B (α-
An inorganic powder mixture was obtained in the same manner as in Example 1 except that 0.5 g of alumina E) was used. Experimental conditions and results are shown in Tables 1 and 2.
【００４５】[0045]
【表１】 [Table 1]
【００４６】[0046]
【表２】 [Table 2]
【００４７】[0047]
【発明の効果】本発明の無機粉末混合物は、充填密度が
高く、流動性が著しく改善されたもので、その安息角が
５０゜以下であるという優れた特徴を有している。本発
明の無機粉末混合物は、単結晶用原料、溶射材用原料、
焼結体用原料、多孔体用原料に適している。INDUSTRIAL APPLICABILITY The inorganic powder mixture of the present invention has a high packing density and remarkably improved fluidity, and has an excellent feature that its angle of repose is 50 ° or less. The inorganic powder mixture of the present invention is a raw material for a single crystal, a raw material for a thermal spray material,
It is suitable as a raw material for sintered bodies and a raw material for porous bodies.
【図１】実施例１で観察されたα−アルミナ粉末と遷移
アルミナ粉末との混合物の粒子構造を示す。図面に代わ
る写真。倍率１７００倍の走査型電子顕微鏡写真。1 shows the particle structure of a mixture of α-alumina powder and transition alumina powder observed in Example 1. FIG. A photo that replaces the drawing. Scanning electron micrograph at 1700x magnification.
【図２】比較例１で観察されたα−アルミナ粉末の粒子
構造を示す。図面に代わる写真。倍率１７００倍の走査
型電子顕微鏡写真。FIG. 2 shows the particle structure of α-alumina powder observed in Comparative Example 1. A photo that replaces the drawing. Scanning electron micrograph at 1700x magnification.
【図３】実施例１〜７および比較例３、４の結果をプロ
ットしたもので、安息角（縦軸）と粉末Ｂの添加量（横
軸）との関係を示す図。FIG. 3 is a plot of the results of Examples 1 to 7 and Comparative Examples 3 and 4, showing the relationship between the angle of repose (vertical axis) and the amount of powder B added (horizontal axis).
Claims (11)
平均粒子径がＤ2 である粉末Ｂとの粉末混合物からな
り、Ｄ1 が０．１μｍ以上３００μｍ以下、Ｄ1 ／Ｄ2
比が１５以上、無機粉末Ａの１００体積部に対して粉末
Ｂが０．００１から１５体積部の範囲にあり、該粉末混
合物の安息角が５０゜以下であることを特徴とする無機
粉末混合物。1. A mineral powder A and the number-average particle diameter Number average particle diameter of D 1 is a powder mixture of a powder B is D 2, D 1 is 0.1μm or more 300μm or less, D 1 / D 2
The ratio of 15 or more, the powder B is in the range of 0.001 to 15 parts by volume with respect to 100 parts by volume of the inorganic powder A, and the repose angle of the powder mixture is 50 ° or less. .
面に数平均粒子径がＤ2 である粉末Ｂが付着した粉末混
合物からなることを特徴とする請求項１記載の無機粉末
混合物。Wherein the number average particle diameter according to claim 1, characterized by comprising a powder mixture having a number average particle diameter was adhered powder B is D 2 on the surface of the inorganic powder A is D 1 inorganic powder blend.
請求項１または２記載の無機粉末混合物。3. The inorganic powder mixture according to claim 1, wherein the powder B is an inorganic powder.
を特徴とする請求項１、２または３記載の無機粉末混合
物。4. The inorganic powder mixture according to claim 1, 2 or 3, wherein the inorganic powder A and the powder B are the same substance.
または多面体粒子からなることを特徴とする請求項１、
２または３記載の無機粉末混合物。5. The inorganic powder A is composed of spherical or polyhedral particles having substantially no fracture surface.
The inorganic powder mixture according to 2 or 3.
コニウム、シリコンの各々の酸化物、窒化物、炭化物、
ホウ化物、複合酸化物、酸窒化物から選ばれる少なくと
も一つを含む単体粉末または混合粉末で、粉末Ｂがアル
ミニウム、チタン、ジルコニウム、シリコンの各々の酸
化物、窒化物、炭化物、ホウ化物、複合酸化物、酸窒化
物、カーボンから選ばれる少なくとも一つを含む単体粉
末または混合粉末であることを特徴とする請求項１、
２、３、４または５記載の無機粉末混合物。6. The inorganic powder A is an oxide, nitride or carbide of aluminum, titanium, zirconium or silicon,
A single powder or a mixed powder containing at least one selected from borides, complex oxides, and oxynitrides, and the powder B is an oxide, nitride, carbide, boride, or complex of aluminum, titanium, zirconium, and silicon. A simple substance powder or a mixed powder containing at least one selected from oxides, oxynitrides and carbon.
Inorganic powder mixture according to 2, 3, 4 or 5.
トリウムアルミニウムガーネット（ＹＡＧ）であること
を特徴とする請求項１、２、３、４、５または６記載の
無機粉末混合物。7. The inorganic powder mixture according to claim 1, 2, 3, 4, 5, or 6, wherein the inorganic powder A is aluminum oxide or yttrium aluminum garnet (YAG).
４、５、６または７記載の無機粉末混合物。8. A raw material for a single crystal, 1, 2, 3,
Inorganic powder mixture according to 4, 5, 6 or 7.
４、５、６または７記載の無機粉末混合物。9. A raw material for a thermal spray material, claim 1, 2, 3,
Inorganic powder mixture according to 4, 5, 6 or 7.
４、５、６または７記載の無機粉末混合物。10. A raw material for a sintered body, 1, 2, 3,
Inorganic powder mixture according to 4, 5, 6 or 7.
４、５、６または７記載の無機粉末混合物。11. A raw material for a porous body, 1, 2, 3,
Inorganic powder mixture according to 4, 5, 6 or 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18066794A JP3814832B2 (en) | 1994-07-07 | 1994-07-07 | Inorganic powder mixture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18066794A JP3814832B2 (en) | 1994-07-07 | 1994-07-07 | Inorganic powder mixture |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0826722A true JPH0826722A (en) | 1996-01-30 |
| JP3814832B2 JP3814832B2 (en) | 2006-08-30 |
Family
ID=16087210
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18066794A Expired - Fee Related JP3814832B2 (en) | 1994-07-07 | 1994-07-07 | Inorganic powder mixture |
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| Country | Link |
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|---|---|---|---|---|
| JP2007008730A (en) * | 2005-06-28 | 2007-01-18 | Denki Kagaku Kogyo Kk | Spherical alumina powder, method for producing the same, and its use |
| JP2008222489A (en) * | 2007-03-13 | 2008-09-25 | Shin Etsu Chem Co Ltd | Method for manufacturing slurry to be used for source material for manufacturing silicon carbide, method for manufacturing secondary particle and method for manufacturing single crystal silicon carbide |
| JP2014084239A (en) * | 2012-10-22 | 2014-05-12 | Shinagawa Refractories Co Ltd | Refractory for slip casting construction |
| WO2016181213A1 (en) * | 2015-05-13 | 2016-11-17 | Oerlikon Metco (Japan) Ltd. | Power for thermal spraying, thermal spraying method, and thermally sprayed coating |
| WO2024116954A1 (en) * | 2022-12-02 | 2024-06-06 | 住友化学株式会社 | Alumina particles and resin composition using same |
| WO2024128321A1 (en) * | 2022-12-16 | 2024-06-20 | デンカ株式会社 | Powder of spherical alumina particles |
-
1994
- 1994-07-07 JP JP18066794A patent/JP3814832B2/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007008730A (en) * | 2005-06-28 | 2007-01-18 | Denki Kagaku Kogyo Kk | Spherical alumina powder, method for producing the same, and its use |
| JP4601497B2 (en) * | 2005-06-28 | 2010-12-22 | 電気化学工業株式会社 | Spherical alumina powder, production method and use thereof |
| JP2008222489A (en) * | 2007-03-13 | 2008-09-25 | Shin Etsu Chem Co Ltd | Method for manufacturing slurry to be used for source material for manufacturing silicon carbide, method for manufacturing secondary particle and method for manufacturing single crystal silicon carbide |
| JP2014084239A (en) * | 2012-10-22 | 2014-05-12 | Shinagawa Refractories Co Ltd | Refractory for slip casting construction |
| WO2016181213A1 (en) * | 2015-05-13 | 2016-11-17 | Oerlikon Metco (Japan) Ltd. | Power for thermal spraying, thermal spraying method, and thermally sprayed coating |
| US11041234B2 (en) | 2015-05-13 | 2021-06-22 | Oerlikon Metco (Japan) Ltd. | Power for thermal spraying, thermal spraying method, and thermally sprayed coating |
| WO2024116954A1 (en) * | 2022-12-02 | 2024-06-06 | 住友化学株式会社 | Alumina particles and resin composition using same |
| WO2024128321A1 (en) * | 2022-12-16 | 2024-06-20 | デンカ株式会社 | Powder of spherical alumina particles |
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| Publication number | Publication date |
|---|---|
| JP3814832B2 (en) | 2006-08-30 |
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