JPS6230605A - Production of fine powder - Google Patents

Production of fine powder

Info

Publication number
JPS6230605A
JPS6230605A JP16978285A JP16978285A JPS6230605A JP S6230605 A JPS6230605 A JP S6230605A JP 16978285 A JP16978285 A JP 16978285A JP 16978285 A JP16978285 A JP 16978285A JP S6230605 A JPS6230605 A JP S6230605A
Authority
JP
Japan
Prior art keywords
hydroxide
salt
added
water
solution
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.)
Pending
Application number
JP16978285A
Other languages
Japanese (ja)
Inventor
Norihiro Kiuchi
木内　規博
Tsutomu Tominaga
力 冨永
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Eneos Corp
Original Assignee
Nippon Mining Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nippon Mining Co Ltd filed Critical Nippon Mining Co Ltd
Priority to JP16978285A priority Critical patent/JPS6230605A/en
Priority to EP86305717A priority patent/EP0211579B1/en
Publication of JPS6230605A publication Critical patent/JPS6230605A/en
Priority to US07/112,053 priority patent/US4816349A/en
Priority to US07/245,680 priority patent/US4882109A/en
Pending legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B13/00—Oxygen; Ozone; Oxides or hydroxides in general
    • C01B13/14—Methods for preparing oxides or hydroxides in general
    • C01B13/36—Methods for preparing oxides or hydroxides in general by precipitation reactions in aqueous solutions

Abstract

PURPOSE:To obtain ultrafine powder of metallic oxide providing high-strength ceramic sintered material, by running a water-soluble salt into a conc. alkali solution by a jet flow or by cutting aggregate of formed hydroxide by jet flow and/or ultrasonic wave. CONSTITUTION:A solution of a water-soluble salt such as Zr salt, Ca salt, Mg salt, Y salt, etc., in distilled water is run into a conc. alkali solution such as conc. ammonia water having >=0.5 mol excess amount of NH3 by a jet flow or a reaction solution is stirred by the jet flow and/or ultrasonic wave with 10-40kHz, so a formed hydroxide to be easily aggregated is cut in pieces or aggregation is prevented, and, if necessary one or more metallic alkoxides are added to the reaction solution. Further the prepared hydroxide is added to an organic solvent (e.g., actonitrile) and aggregation is prevented by ultrasonic vibration. Then, the prepared fine powder is freeze-dried, subjected to airborne drying and calcined to give ultrafine powder of metallic oxide.

Description

【発明の詳細な説明】 産！よ互■朋分互 本発明は、微粉体の製造法に関する。[Detailed description of the invention] Birth! Yo mutual ■ friend mutual The present invention relates to a method for producing fine powder.

丈米挟権 金属酸化物の超微粉体は、セラミック構造体等に使用さ
れる。Ultrafine powders of metal oxides are used in ceramic structures and the like.

これら好ましいセラミック粉の製造方法は、種々行われ
ているが、その中で、−炭水酸化物を形成した後、乾燥
、焼成しセラミック粉を製造する方法がある。There are various methods for producing these preferred ceramic powders, and among them, there is a method in which -carbon hydroxide is formed, followed by drying and firing to produce ceramic powder.

この方法においては、濃アルカリ溶液中に金属硝酸塩を
添加する方法、あるいは、混合粉を製造する場合は、金
属硝酸塩の添加後、金属塩化物を添加し微粉を得る方法
がある。In this method, there is a method of adding a metal nitrate to a concentrated alkaline solution, or, when producing a mixed powder, a method of adding a metal chloride after adding the metal nitrate to obtain a fine powder.

これらの方法で、−次位子はかなり細かい粉が得られる
のではあるが、二次粒子が１μ以下の粒径の粉を多く得
ることは難しく、その対策が望まれている。By these methods, it is possible to obtain a powder with very fine secondary particles, but it is difficult to obtain a large amount of powder whose secondary particles have a particle size of 1 μm or less, and countermeasures are desired.

ｌ匪座１廣 本発明者等は、上記の問題点を解決すべく検討した結果
以下の方法を見い出した。The inventors of the present invention have studied to solve the above problems and have found the following method.

即ち、水溶性塩一種以上を濃アルカリ液に添加し、水酸
化物を得る方法において、前記塩を濃アルカリ液に添加
する際、ジェット流により前記添加物の溶体を添加する
ことおよび又はジェット流および又は超音波により生成
水酸化物の凝集を分断させあるいは避ける微粉体の製造
法である。That is, in a method for obtaining a hydroxide by adding one or more water-soluble salts to a concentrated alkaline solution, when adding the salt to the concentrated alkaline solution, a solution of the additive is added by a jet stream; and/or a method for producing fine powder in which agglomeration of produced hydroxide is disrupted or avoided by ultrasonic waves.

上記発明の実施態様として、水溶性塩が、ジルコニウム
塩、カルシウム塩、マグネシウム塩、イツトリウム塩の
一種以上である発明も提供する。As an embodiment of the above invention, there is also provided an invention in which the water-soluble salt is one or more of zirconium salts, calcium salts, magnesium salts, and yttrium salts.

水溶性塩一種以上を濃アルカリ液に添加し、水酸化物を
得る方法において、前記塩を濃アルカリ液に添加する際
、ジェット流により前記添加物の溶体を添加することお
よび又はジェット俸および又は超音波により生成水酸化
物の凝集を分断させあるいは避けて反応を行わせ、その
後金属アルコキシドを一種以上添加する微粉体の製造法
も提供する。さらに、水溶性塩一種以上を濃アルカリ液
に添加し、水酸化物を得る方法において、前記塩を濃ア
ルカリ液に添加する際、ジェット流により前記添加物の
溶体を添加することおよび又はジェット流および又は超
音波により１成水酸化物の凝集を分断させあるいは避け
て得られたものを、有機溶媒中に加え、該溶媒中の水酸
化物に超音波振動を加え、凝集を防止する微粉体の製造
法も提供する。In a method for obtaining a hydroxide by adding one or more water-soluble salts to a concentrated alkaline solution, when adding the salt to the concentrated alkaline solution, a solution of the additive is added by a jet stream, and/or a jet stream and/or The present invention also provides a method for producing fine powder in which the reaction is carried out by disrupting or avoiding agglomeration of the produced hydroxide using ultrasonic waves, and then one or more metal alkoxides are added. Furthermore, in the method for obtaining a hydroxide by adding one or more water-soluble salts to a concentrated alkaline solution, when adding the salt to the concentrated alkaline solution, a solution of the additive is added by a jet stream; and/or fine powder obtained by disrupting or avoiding agglomeration of primary hydroxides by ultrasonic waves, which is added to an organic solvent, and ultrasonic vibrations are applied to the hydroxides in the solvent to prevent agglomeration. It also provides a manufacturing method.

また、水溶性塩一種以上を濃アルカリ液に添加し、水酸
化物を得る方法において、前記塩を濃アルカリ液に添加
する際、ジェット流により前記添加物の溶体を添加する
ことおよび又はジェット流および又は超音波により生成
水酸化物の凝集を分断させあるいは避けて得られたもの
を、凍結乾燥又は気流乾燥又は他の乾燥後、硝酸根イオ
ン及び又は有機溶媒を存在させて、焼成し、さらに凝集
を防止する微粉体の製造法も提供する。Further, in the method of adding one or more water-soluble salts to a concentrated alkaline solution to obtain a hydroxide, when adding the salt to the concentrated alkaline solution, a solution of the additive is added by a jet stream; and/or the product obtained by disrupting or avoiding agglomeration of the generated hydroxide by ultrasonic waves, after freeze drying, flash drying or other drying, calcination in the presence of nitrate radical ions and/or an organic solvent, and further A method for producing a fine powder that prevents agglomeration is also provided.

見吋匹土肛 以下本発明について詳細に説明する。Watching anus The present invention will be explained in detail below.

本発明で対象となる原料は、水溶性塩である。The raw material targeted by the present invention is a water-soluble salt.

水溶性塩の中では、ジルコニウム塩、カルシウム塩、マ
グネシウム塩、イツトリウム塩等である。Among the water-soluble salts, there are zirconium salts, calcium salts, magnesium salts, yttrium salts, and the like.

ジルコニウム塩の中には、オキシ塩化ジルコニウム、硝
酸ジルコニウム、硫酸ジルコニウム塩、ジルコニウムア
ルコキシド等が用いられる。Among the zirconium salts, zirconium oxychloride, zirconium nitrate, zirconium sulfate, zirconium alkoxide, etc. are used.

予め濃アルカリ液を用意する。濃アルカリ液は、例えば
アンモニア水であれば中和後のＮＨ３の過剰量が０．５
モル以上の濃いものを用いる。Prepare a concentrated alkaline solution in advance. For example, if the concentrated alkaline solution is ammonia water, the excess amount of NH3 after neutralization is 0.5
Use one that is more than mol thick.

反応が、一時に生ずることにより、微粉を生じ易いため
である。This is because the reaction occurs all at once, which tends to produce fine powder.

また、酸化物の混合粉を製造する場合は、金属硝酸塩、
金属塩化物、金属アルコキシドを一度に混ぜ合わせるよ
りも、一種以上の塩を濃アルカリ液と反応させた後、他
の塩を反応させる方法がより好ましい微粉を得ることが
できる。In addition, when producing mixed powder of oxides, metal nitrates,
Rather than mixing metal chlorides and metal alkoxides at once, it is possible to obtain fine powder by reacting one or more salts with a concentrated alkali solution and then reacting other salts.

さらに反応液に分散剤を添加しておくことが好ましい。Furthermore, it is preferable to add a dispersant to the reaction solution.

分散剤としては、焼成時等に分解する有機物であって、
製品中に不純物として残存しないものが好ましい。例え
ば１合成ポリカルボン酸塩のごとく、焼成中にガス化し
、不純物として粉体中に残存しないものが好ましい。The dispersant is an organic substance that decomposes during firing, etc.
Preferably, it does not remain as an impurity in the product. For example, it is preferable to use one that gasifies during firing and does not remain as an impurity in the powder, such as 1 synthetic polycarboxylate.

さらに本発明では、特に上記の方法に加えて、濃アルカ
リ液中に、加える金属塩等をジェット流で流し込むこと
により、またジェット流および又は超音波で反応液を攪
拌することにより凝集し易い水酸化物を分断あるいは、
避けるものである。Furthermore, in the present invention, in addition to the above-mentioned method, water that tends to coagulate can be removed by pouring the metal salt, etc. to be added into the concentrated alkaline solution with a jet stream, or by stirring the reaction solution with a jet stream and/or ultrasonic waves. Parting the oxide or
It is something to avoid.

ジェット流が、装入される位置は、反応液上部である場
合は、水面下であって斜め下方を向けた位置が好ましい
。When the jet stream is placed above the reaction liquid, it is preferably placed below the water surface and directed diagonally downward.

また、底部中心部より上方に向けた位置であって、該水
面下近傍には、ジェット流を反射させる板を設け、ジェ
ット流を下方に向ける構造体が好ましい。Further, it is preferable that a plate for reflecting the jet flow is provided at a position facing upward from the center of the bottom and near the water surface to direct the jet flow downward.

凝集を進行し難しくさらに、凝集したものを分断する作
用があれば良い。It is preferable that it is difficult to advance agglomeration and has an effect of dividing the agglomerated material.

超音波は、１０〜４０キロヘルツで行われる。Ultrasound is performed at 10-40 kilohertz.

超音波は、金属塩が反応液に加えられる前に予め反応液
に与えておくことが好ましい。水酸化物の凝集は、水酸
化物形成後直ちに、起こるためである。又通常の攪拌機
を併用することを妨げるものでない、さらにホモジナイ
ザー等の攪拌機であればより効果的である。It is preferable to apply ultrasound to the reaction solution in advance before the metal salt is added to the reaction solution. This is because hydroxide aggregation occurs immediately after hydroxide formation. Further, it is not prohibited to use a common stirrer in combination, and a stirrer such as a homogenizer is more effective.

また本発明をより効果的に行うための方法としては、金
属アルコキシドを一種以上、昨独物の場合は、同一金属
の金属アルコキシドを加える。この場合も好ましくは、
ジェット流及び又は超音波により添加される。Further, as a method for carrying out the present invention more effectively, one or more metal alkoxides are added, and in the case of metal alkoxides, metal alkoxides of the same metal are added. In this case as well, preferably
Added by jet stream and/or ultrasound.

また、さらに凝集を防止する方法としては。Also, as a method to further prevent agglomeration.

得られた水酸化物を、有機溶媒中に加え、超音波振動を
加える方法である。In this method, the obtained hydroxide is added to an organic solvent and ultrasonic vibration is applied.

ここで用いる有機溶媒としては、アセトニトリル、メタ
ノール、エーテル、クロロホルム。The organic solvent used here is acetonitrile, methanol, ether, and chloroform.

炭素数１０以下のアルコール等を含むものである。This includes alcohols having 10 or less carbon atoms.

さらに、得られた微粉は、凍結乾燥後、さらには、気流
乾燥等により、乾燥を行い二次粒子が成長しない手段を
とることが好ましい。Furthermore, it is preferable to dry the obtained fine powder by freeze-drying and further by air-flow drying or the like to prevent the growth of secondary particles.

また乾燥後の焼成（６００−８００℃）に際し、予め、
凝集を極力避けるため硝酸根イオンを添加しておくこと
が好ましい。In addition, before baking (600-800℃) after drying,
In order to avoid agglomeration as much as possible, it is preferable to add nitrate radical ions.

硝酸根イオンは、焼成中にガス化するため、凝集を防止
し、二次粒子の製造を防止することができるのである。Since nitrate radical ions are gasified during firing, they can prevent agglomeration and the production of secondary particles.

さらに、残存することがないので、好ましい結果が得ら
れる。Furthermore, since no residue remains, favorable results can be obtained.

ただ硝酸根の分解及びガス化が比較的低温で完了するこ
とを考慮し、その後にガス化する有機溶剤を併用するこ
とがより好ましい。However, considering that the decomposition and gasification of nitrate radicals are completed at a relatively low temperature, it is more preferable to use an organic solvent that is subsequently gasified.

ここで有機溶剤とは、不飽和カルボン酸、アセトニトリ
ル、メタノールエーテル、クロロホルム、炭素数１０以
下のアルコール等を含む。Here, the organic solvent includes unsaturated carboxylic acids, acetonitrile, methanol ether, chloroform, alcohols having 10 or less carbon atoms, and the like.

このことにより焼成温度全範囲に渡りガス化が生じ続け
ることになり凝集の少ない好ましい超微粉が得られる。As a result, gasification continues to occur over the entire firing temperature range, resulting in a preferable ultrafine powder with little agglomeration.

また焼成に際し、所謂二段焼成を行うことにより好適な
粉が得られる。二段焼成とは、一段目で５００〜７００
℃程度で焼成し、その後粉砕し、ついで６００〜１００
０℃程度で焼成するものである。Further, during the firing, a suitable powder can be obtained by performing so-called two-stage firing. Two-stage firing means 500 to 700 in the first stage.
It is fired at a temperature of about 600 - 100℃, then crushed.
It is fired at about 0°C.

羞米 以上のように本発明を実施することにより以下の効果が
得られる。By implementing the present invention as described above, the following effects can be obtained.

（］）濃アルカリに濃度が濃い塩を添加すると凝集され
易いが、本発明によれば、前記凝集がされ難い。(]) When a salt with a high concentration is added to a concentrated alkali, it tends to cause aggregation, but according to the present invention, the aggregation is difficult to occur.

（２）凝集が極めて効果的に避けられるため、焼成後の
二次粒子が細かい超微粉の金属酸化物粉が得られる。(2) Since agglomeration is extremely effectively avoided, ultrafine metal oxide powder with fine secondary particles after firing can be obtained.

（３）上記超微粉が得られるため構造材等に用いるセラ
ミック焼結体として、強度の高いものが得られる。(3) Since the ultrafine powder described above can be obtained, a ceramic sintered body with high strength can be obtained for use in structural materials and the like.

去１濠１＝ 蒸留水にオキシ塩化ジルコニウム（ＺｒＯＣｌ２・８Ｈ
，Ｏ）を含む液をアンモニア水（ＮＨ，２９ｗｔ％）の
液中に、ジェット気流を介して噴入した。1 = Zirconium oxychloride (ZrOCl2.8H) in distilled water
, O) was injected into aqueous ammonia (NH, 29 wt%) via a jet stream.

水深３ｍのタンクの底部中央にノズルを設け。A nozzle is installed at the center of the bottom of the tank, which is 3m deep.

０．５＋ｍ／秒の流速でオキシ塩化ジルコニウム溶液を
吹き込んだ。ジェット流は、水面下に設けた反射板に当
たり、下方に向けて再び流れ、水酸化物の凝集防止に寄
与した。The zirconium oxychloride solution was blown in at a flow rate of 0.5+m/sec. The jet stream hit a reflective plate placed below the water surface and flowed downward again, contributing to preventing hydroxide agglomeration.

生じた水酸化物は、凝集の少ないものが得られた。The resulting hydroxide had less agglomeration.

去ｍ影 蒸留水にオキシ塩化ジルコニウム（ＺｒＯＣｌ２・８Ｈ
，Ｏ）及び塩化イツトリウムを含む液をアンモニア水（
ＮＨ，２９ｗｔ％）の液中に、超音波２５キロヘルツで
振動させた後添加した。Add zirconium oxychloride (ZrOCl2.8H) to distilled water.
, O) and yttrium chloride was mixed with aqueous ammonia (
NH, 29 wt%) after being vibrated with ultrasonic waves of 25 kHz.

生じた水酸化物は、凝集の少ないものが得られた。The resulting hydroxide had less agglomeration.

来庶五立 オキシ硝酸ジルコニウムを２９ｗｔ％ＮＨ。Raijo Goryu Zirconium oxynitrate with 29wt% NH.

からなるアンモニア水に添加するに際し、予めアンモニ
ア水に超音波振動を２５キロヘルツにより起こさせ、小
量ずつ添加し、ついで、硝酸イツトリウムを前記超音波
振動を起こさせた状態で添加し水酸化物を得た。When adding yttrium nitrate to aqueous ammonia, the ammonia water is first subjected to ultrasonic vibrations at 25 kilohertz and added in small amounts, and then yttrium nitrate is added while the ultrasonic vibrations are being generated to remove the hydroxide. Obtained.

水酸化物中に混入している硝酸は、除くことなく、気流
乾燥により乾燥しく１５０℃）、ついで、９００℃１時
間で焼成し、好ましい超微粉を得た。The hydroxide was dried by flash drying (150°C) without removing the nitric acid mixed in the hydroxide, and then calcined at 900°C for 1 hour to obtain a preferable ultrafine powder.

末嵐員土 オキシ硝酸ジルコニウムを２９ｗｔ％ＮＨ。Suearashi Kanato Zirconium oxynitrate with 29wt% NH.

からなるアンモニア水に添加するに際し、オキシ硝酸ジ
ルコニウムの混合液をジェット流を介して装入し、つい
で塩化イツトリウムをジェット流を介して装入し、反応
させた後、ジルコニウムアルコキシドを、前記同様ジェ
ット流を介して装入し、反応させ、凍結乾燥を行い、つ
いで２アクリル酸を少量、凝集防止剤として加え、８５
０℃Ｉ　Ｈｒで焼成した。得られた粉は、二次凝集の極
めて少ない超微粉であった。When adding the zirconium oxynitrate mixture to the ammonia water consisting of the zirconium oxynitrate mixture, the zirconium oxynitrate mixture was charged via a jet stream, and then the yttrium chloride was charged via a jet stream to react. Charged via stream, reacted, lyophilized, then added a small amount of 2acrylic acid as anti-flocculant, 85
It was fired at 0° C. I Hr. The obtained powder was an ultrafine powder with extremely little secondary aggregation.

Claims (5)

【特許請求の範囲】[Claims] （１）水溶性塩一種以上を濃アルカリ液に添加し、水酸
化物を得る方法において、前記塩を濃アルカリ液に添加
する際、ジェット流により前記添加物の溶体を添加する
ことおよび又はジェット流および又は超音波により生成
水酸化物の凝集を分断させあるいは避けることを特徴と
する微粉体の製造法。(1) In a method for obtaining a hydroxide by adding one or more water-soluble salts to a concentrated alkaline solution, when adding the salt to the concentrated alkaline solution, a solution of the additive is added by a jet stream; or A method for producing fine powder, characterized by breaking up or avoiding agglomeration of produced hydroxide by using a flow and/or ultrasonic waves. （２）水溶性塩が、ジルコニウム塩、カルシウム塩、マ
グネシウム塩、イットリウム塩の一種以上であることを
特徴とする第１項記載の微粉体の製造法。(2) The method for producing fine powder according to item 1, wherein the water-soluble salt is one or more of zirconium salts, calcium salts, magnesium salts, and yttrium salts. （３）水溶性塩一種以上を濃アルカリ液に添加し、水酸
化物を得る方法において、前記塩を濃アルカリ液に添加
する際、ジェット流により前記添加物の溶体を添加する
ことおよび又はジェット流および又は超音波により生成
水酸化物の凝集を分断させあるいは避けて反応を行わせ
、その後金属アルコキシドを一種以上添加することを特
徴とする微粉体の製造法。(3) In a method for obtaining a hydroxide by adding one or more water-soluble salts to a concentrated alkaline solution, when adding the salt to the concentrated alkaline solution, a solution of the additive is added by a jet stream; or 1. A method for producing fine powder, characterized in that the reaction is carried out by disrupting or avoiding agglomeration of the produced hydroxide by flow and/or ultrasonic waves, and then one or more metal alkoxides are added. （４）水溶性塩一種以上を濃アルカリ液に添加し、水酸
化物を得る方法において、前記塩を濃アルカリ液に添加
する際、ジェット流により前記添加物の溶体を添加する
ことおよび又はジェット流および又は超音波により生成
水酸化物の凝集を分断させあるいは避けて得られたもの
を、有機溶媒中に加え、該溶媒中の水酸化物に超音波振
動を加え、凝集を防止することを特徴とする微粉体の製
造法。(4) In the method of adding one or more water-soluble salts to a concentrated alkaline solution to obtain a hydroxide, when adding the salt to the concentrated alkaline solution, a solution of the additive is added by a jet stream; The product obtained by disrupting or avoiding agglomeration of the generated hydroxide by flow and/or ultrasound is added to an organic solvent, and ultrasonic vibration is applied to the hydroxide in the solvent to prevent aggregation. Characteristic method for producing fine powder. （５）水溶性塩一種以上を濃アルカリ液に添加し、水酸
化物を得る方法において、前記塩を濃アルカリ液に添加
する際、ジェット流により前記添加物の溶体を添加する
ことおよび又はジェット流および又は超音波により生成
水酸化物の凝集を分断させあるいは避けて得られたもの
を、凍結乾燥又は気流乾燥又は他の乾燥後、硝酸根イオ
ン及び又は有機溶媒を存在させて、焼成し、さらに凝集
を防止することを特徴とする微粉体の製造法。(5) In a method for obtaining a hydroxide by adding one or more water-soluble salts to a concentrated alkaline solution, when adding the salt to the concentrated alkaline solution, a solution of the additive is added by a jet stream; After freeze-drying, flash-drying or other drying, the product obtained by disrupting or avoiding agglomeration of the produced hydroxide by air flow and/or ultrasound, is calcined in the presence of nitrate radical ions and/or an organic solvent, A method for producing fine powder characterized by further preventing agglomeration.
JP16978285A 1985-08-02 1985-08-02 Production of fine powder Pending JPS6230605A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP16978285A JPS6230605A (en) 1985-08-02 1985-08-02 Production of fine powder
EP86305717A EP0211579B1 (en) 1985-08-02 1986-07-25 Method of making a silicon nitride sintered member
US07/112,053 US4816349A (en) 1985-08-02 1987-10-22 Zirconia-coated silicon nitride sintered member
US07/245,680 US4882109A (en) 1985-08-02 1988-09-19 Process of preparing zirconia-coated silicon nitride sintered member

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16978285A JPS6230605A (en) 1985-08-02 1985-08-02 Production of fine powder

Publications (1)

Publication Number Publication Date
JPS6230605A true JPS6230605A (en) 1987-02-09

Family

ID=15892765

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16978285A Pending JPS6230605A (en) 1985-08-02 1985-08-02 Production of fine powder

Country Status (1)

Country Link
JP (1) JPS6230605A (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6270204A (en) * 1985-09-19 1987-03-31 Nippon Mining Co Ltd Production of fine powder
JPS62182104A (en) * 1986-02-03 1987-08-10 Mitsui Petrochem Ind Ltd Formation of inorganic hydroxide precipitate
JPS62260703A (en) * 1986-05-01 1987-11-13 Mitsui Petrochem Ind Ltd Treatment of precipitate of inorganic hydroxide
JPS6325206A (en) * 1986-07-16 1988-02-02 Ngk Spark Plug Co Ltd Production of ceramic powder
JPS6374904A (en) * 1986-09-17 1988-04-05 Kawasaki Steel Corp Production of inorganic fine powder
FR2624505A1 (en) * 1987-12-11 1989-06-16 Rhone Poulenc Chimie STABILIZED ZIRCONIA, PROCESS FOR PREPARING THE SAME AND APPLICATION THEREOF IN CERAMIC COMPOSITIONS
US5143965A (en) * 1990-12-26 1992-09-01 The Dow Chemical Company Magnesium hydroxide having fine, plate-like crystalline structure and process therefor
US5417956A (en) * 1992-08-18 1995-05-23 Worcester Polytechnic Institute Preparation of nanophase solid state materials
US5466646A (en) * 1992-08-18 1995-11-14 Worcester Polytechnic Institute Process for the preparation of solid state materials and said materials
KR100399716B1 (en) * 2001-06-07 2003-09-29 한국과학기술연구원 The Manufacturing Method Of Fine Powder Of Nickel

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6270204A (en) * 1985-09-19 1987-03-31 Nippon Mining Co Ltd Production of fine powder
JPS62182104A (en) * 1986-02-03 1987-08-10 Mitsui Petrochem Ind Ltd Formation of inorganic hydroxide precipitate
JPS62260703A (en) * 1986-05-01 1987-11-13 Mitsui Petrochem Ind Ltd Treatment of precipitate of inorganic hydroxide
JPS6325206A (en) * 1986-07-16 1988-02-02 Ngk Spark Plug Co Ltd Production of ceramic powder
JPS6374904A (en) * 1986-09-17 1988-04-05 Kawasaki Steel Corp Production of inorganic fine powder
JPH0575683B2 (en) * 1986-09-17 1993-10-21 Kawasaki Steel Co
FR2624505A1 (en) * 1987-12-11 1989-06-16 Rhone Poulenc Chimie STABILIZED ZIRCONIA, PROCESS FOR PREPARING THE SAME AND APPLICATION THEREOF IN CERAMIC COMPOSITIONS
US5143965A (en) * 1990-12-26 1992-09-01 The Dow Chemical Company Magnesium hydroxide having fine, plate-like crystalline structure and process therefor
US5417956A (en) * 1992-08-18 1995-05-23 Worcester Polytechnic Institute Preparation of nanophase solid state materials
US5466646A (en) * 1992-08-18 1995-11-14 Worcester Polytechnic Institute Process for the preparation of solid state materials and said materials
KR100399716B1 (en) * 2001-06-07 2003-09-29 한국과학기술연구원 The Manufacturing Method Of Fine Powder Of Nickel

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