JP2977854B2 - Method for producing potassium hexatitanate fiber - Google Patents
Method for producing potassium hexatitanate fiberInfo
- Publication number
- JP2977854B2 JP2977854B2 JP2078941A JP7894190A JP2977854B2 JP 2977854 B2 JP2977854 B2 JP 2977854B2 JP 2078941 A JP2078941 A JP 2078941A JP 7894190 A JP7894190 A JP 7894190A JP 2977854 B2 JP2977854 B2 JP 2977854B2
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- Prior art keywords
- fiber
- potassium
- titanium
- powder
- present
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- Inorganic Compounds Of Heavy Metals (AREA)
- Crystals, And After-Treatments Of Crystals (AREA)
Description
【発明の詳細な説明】 ［産業上の利用分野］ 本発明は耐熱性、断熱性、耐化学性および補強性に優
れ、耐火断熱材、濾過材、プラスチックおよび低融点金
属の補強材などとして利用されるチタン酸カリウム繊維
の製造方法に係り、さらに詳しくは予めアルミナおよび
／またはシリカによって表面処理を施した酸化チタン、
重炭酸カリウムおよびチタン粉末および／または水素化
チタン粉末を出発原料として使用し、表面が平滑でかつ
繊維径および繊維長の整った六チタン酸カリウム繊維の
製造方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention is excellent in heat resistance, heat insulation, chemical resistance and reinforcement, and is used as a fire-resistant heat insulating material, a filter material, a reinforcing material for plastics and low melting point metals, etc. More specifically, the present invention relates to a method for producing a potassium titanate fiber, more specifically, a titanium oxide surface-treated with alumina and / or silica in advance,
The present invention relates to a method for producing potassium hexatitanate fiber having a smooth surface and a uniform fiber diameter and fiber length, using potassium bicarbonate and titanium powder and / or titanium hydride powder as starting materials.
［従来の技術］ チタン酸カリウム繊維の製造法はすでにいろいろな方
法が提案されているが、大別すれば焼成法、フラックス
法、溶融法、水熱法、および融体法に分けられる。これ
らのうち、工業的にチタン酸カリウム繊維を製造する方
法としては、焼成法、フラックス法および融体法が大規
模化連続化の点で有利であるといわれている。[Prior Art] Various methods for producing potassium titanate fiber have already been proposed, but they are roughly classified into a calcination method, a flux method, a melting method, a hydrothermal method, and a melt method. Among these, as methods for industrially producing potassium titanate fibers, it is said that a firing method, a flux method, and a melt method are advantageous in terms of increasing the scale and continuity.
焼成法は、通常炭酸カリウムと二酸化チタンの混合物
を600〜1200℃で一定時間焼成する方法であり、単繊維
結晶の収率を上げるため、融剤として少量の第三成分
（例えばKClなど）を添加することが好ましいとされて
いる。この焼成法によれば単繊維結晶の収率は良いが、
繊維の結晶性があまり良くなく、また、数ミクロンとい
った短繊維しか得られないといった欠点がある。The firing method is a method in which a mixture of potassium carbonate and titanium dioxide is usually fired at 600 to 1200 ° C. for a certain period of time. To increase the yield of single fiber crystals, a small amount of a third component (such as KCl) is used as a flux. It is preferred to add. According to this firing method, the yield of single fiber crystals is good,
There are drawbacks in that the crystallinity of the fiber is not very good and that only short fibers of several microns can be obtained.
フラックス法は炭酸カリウムと二酸化チタンの混合物
に融剤として塩化カリウムまたはフッ化カリウムを水添
する方法が一般的に知られており、モリブデン酸カリウ
ムまたはタングステン酸カリウムを融剤として用いる方
法も提案されている。このフラックス法によると、比較
的長い（数ミクロン〜数十ミクロン）繊維結晶も得ら
れ、また、単繊維結晶の収率も良いという利点がある
が、融剤としての塩化カリウムやフッ化カリウムの使用
によって、塩素やフッ素を含む有害かつ腐食性のガスが
多量に発生すること、さらには解繊工程および水洗工程
で出る排液の処理ならびに融剤の回収装置を必要とし、
製造設備が高価につくという問題がある。As a flux method, a method of hydrogenating potassium chloride or potassium fluoride as a flux to a mixture of potassium carbonate and titanium dioxide is generally known, and a method of using potassium molybdate or potassium tungstate as a flux has also been proposed. ing. According to this flux method, relatively long (several microns to several tens of microns) fiber crystals can be obtained, and the yield of single fiber crystals is good. However, potassium chloride or potassium fluoride as a flux is advantageous. Due to its use, a large amount of harmful and corrosive gases including chlorine and fluorine are generated, and furthermore, it is necessary to treat wastewater discharged in the defibration process and the washing process and to collect the flux.
There is a problem that manufacturing equipment is expensive.
融体法は炭酸カリウムと二酸化チタンの混合物を1100
℃以上に加熱し溶融したものを急冷固化する方法であ
り、得られる団塊はきわめて繊維質に富んだものとなる
が、繊維質は二チタン酸カリウム繊維（K2Ti2O5）であ
り、Ｘ線解析を行うと非晶質であり、繊維径も太く、強
度が弱いので利用分野が制限される。Melt method is a mixture of potassium carbonate and titanium dioxide 1100
It is a method of quenching and solidifying what has been heated and melted at a temperature of at least ℃, and the resulting nodules will be extremely rich in fiber, but the fiber is potassium dititanate fiber (K 2 Ti 2 O 5 ), When X-ray analysis is performed, it is amorphous, the fiber diameter is large, and the strength is low, so the field of use is limited.
本発明者等はこのような従来法の欠点を克服するため
に特開昭62−256799号公報において、耐熱性および耐化
学性に優れ、機械的強度も高い六チタン酸カリウム繊維
を工業的に有利な方法といわれている焼成法により、一
般に金属チタン製錬の原料として用いられる酸化チタン
含有鉱石を出発原料として比較的安価に製造する方法を
提案した。In order to overcome such disadvantages of the conventional method, the present inventors disclosed in Japanese Patent Application Laid-open No. Sho 62-256799 that potassium hexatitanate fiber having excellent heat resistance and chemical resistance and high mechanical strength was industrially manufactured. A method for producing titanium oxide-containing ore, which is generally used as a raw material for refining titanium metal, as a starting material by a firing method, which is considered to be an advantageous method, has been proposed at a relatively low cost.
［発明が解決しようとする課題］ しかしながらチタン酸カリウム繊維は前記した通り、
プラスチックや軽金属等と補強材としての用途にその将
来性を求められている今日、単に繊維長や繊維径のみに
その特性を強調することには偏りがある。マトリックス
材へのなじみや過酷な条件下での耐蝕性、さらには近年
ますます斯界の要望が高い成形性などの加工性や、成形
後の変形などに耐える安定性などに加えて露出部分の多
い用途においては表面のつやまでが審美性の上で欠かせ
ない要件になってくる。斯かる要件を満たすためには繊
維の表面が平滑であり、かつ繊維長や繊維径が平均して
いることが望ましい。[Problems to be Solved by the Invention] However, potassium titanate fiber is, as described above,
Today, there is a demand for the future of plastics, light metals, etc. and their use as reinforcing materials, and there is a bias in emphasizing the characteristics solely on the fiber length and fiber diameter. In addition to familiarity with matrix materials and corrosion resistance under severe conditions, furthermore, the demands of the industry in recent years are increasingly high, such as workability such as formability, stability to withstand deformation after molding, etc. In application, even the gloss of the surface becomes an indispensable requirement for aesthetics. In order to satisfy such requirements, it is desirable that the surface of the fiber is smooth and the fiber length and fiber diameter are averaged.
ところが、従来公知のチタン酸カリウム繊維は繊維長
と繊維径の比、すなわちアスペクト比が一定せず、該繊
維中に８μｍ以下程度のものが含まれていること、その
比表面積が10〜15m2/gと大きく、かつ吸油量も増大し
て、増粘傾向や流動性に悪影響を及ぼし、マトリックス
材へのなじみや均一な分散の妨げとなるために用途が制
限されるという課題を残されていた。However, the conventionally known potassium titanate fiber has a fiber length to fiber diameter ratio, that is, an aspect ratio is not constant, the fiber contains about 8 μm or less, and the specific surface area is 10 to 15 m 2. / g, and the amount of oil absorption also increases, adversely affecting the tendency to thicken and flowability, and has the problem that the application to the matrix material is limited because it hinders familiarity with the matrix material and uniform dispersion. Was.
本発明者等は斯かる課題を解決すべく鋭意研究を進め
た結果、本発明に達し、茲に提案するものである。The present inventors have made intensive studies to solve such problems, and as a result, have reached the present invention and propose the present invention.
［課題を解決するための手段］ すなわち、本発明は（ａ）予めアルミナおよび／また
はシリカによって表面処理を施した酸化チタン（以下単
に（ａ）成分ということがある。）と、（ｂ）炭酸水素
アルカリ金属（以下単に（ｂ）成分ということがあ
る。）、および（ｃ）チタン粉末および／または水素化
チタン粉末（以下単に（ｃ）成分ということがある。）
を混合し、得られた混合物を800〜1200℃の温度域で加
熱焼成後該焼成物を水または温水にて処理して水可溶分
を抽出した後解繊することを特徴とする六チタン酸カリ
ウム繊維の製造方法を提供するものである。[Means for Solving the Problems] That is, the present invention provides (a) titanium oxide (hereinafter sometimes simply referred to as component (a)) which has been previously surface-treated with alumina and / or silica, and (b) carbonic acid. Alkali hydrogen metal (hereinafter sometimes simply referred to as component (b)), and (c) titanium powder and / or titanium hydride powder (hereinafter sometimes simply referred to as component (c)).
And the resulting mixture is heated and fired in a temperature range of 800 to 1200 ° C., and then the fired material is treated with water or hot water to extract a water-soluble component and then defibrated. It is intended to provide a method for producing potassium acid fiber.
本発明において用いる（ａ）成分としては、市販の顔
料用酸化チタンの中からアルミナおよびシリカにより表
面処理を施したもので、かつ、ルチルタイプのグレード
が望ましい。As the component (a) used in the present invention, a commercially available titanium oxide for a pigment, which has been subjected to a surface treatment with alumina and silica, and is preferably a rutile type grade.
本発明において使用される（ｂ）成分としては通常市
販の重炭酸カリウムが好ましい。As the component (b) used in the present invention, commercially available potassium bicarbonate is usually preferred.
本発明において使用される（ｃ）成分は通常市販され
ている微粒のものを使用することもできるが、スポンジ
チタン製造工程より得られる格外品としてのアンダーメ
ッシュ品（−20メッシュ）をもちいるのが価格の面で有
利である。また、チタンインゴットを切削した後これを
粉砕して得られるチタン粉末およびチタン合金粉末を用
いることも可能である。The component (c) used in the present invention may be a commercially available fine particle, but an undermesh product (-20 mesh) as an extraordinary product obtained from the titanium sponge manufacturing process is used. Is advantageous in terms of price. It is also possible to use titanium powder and titanium alloy powder obtained by cutting a titanium ingot and then pulverizing it.
本発明の方法にあっては、上記（ａ）成分と（ｂ）成
分とを一般式K2O・ｎ（Ti・Ｍ）O2（ただしｎは2.5〜3.
5、Ｍは表面処理に使用される金属を表す）で示す割合
に混合し、これらの混合物に対して0.1〜10wt％の
（ｃ）成分を添加し、Ｖ型ブレンダー等の粉末体混合機
にて混合を行い原料の反応性を向上させ、その後800℃
〜1200℃好ましくは1100℃にて１〜３時間焼成を行い繊
維状焼成体を形成させる。次いでこの繊維状焼成体を徐
冷して別容器へ移し粉砕したのち、水または温水中で攪
拌機により強制的に５〜10時間攪拌処理を行いその後コ
ロイドミルにて解繊を行う。得られた繊維状物を中和水
洗後濾過し、100〜250℃で乾燥させたものを800℃にて
焼成するものである。In the method of the present invention, the component (a) and the component (b) are represented by the general formula K 2 O · n (Ti · M) O 2 (where n is 2.5 to 3.
5, M represents a metal used for surface treatment), and 0.1 to 10 wt% of the component (c) is added to the mixture, and the mixture is added to a powder blender such as a V-type blender. To improve the reactivity of the raw materials, then 800 ° C
Firing at 1-3200 ° C., preferably 1100 ° C. for 1-3 hours to form a fibrous fired body. Next, the fibrous fired body is gradually cooled, transferred to another container and pulverized, and then is subjected to a stirring treatment in water or hot water by a stirrer for 5 to 10 hours, followed by defibration in a colloid mill. The obtained fibrous material is washed with neutralized water, filtered, dried at 100 to 250 ° C., and calcined at 800 ° C.
本発明において使用する原料中の不純物Al2O3、SiO2
等は生成される繊維の結晶中に微量成分として残留され
る。かくの如くして得られた生成物をＸ線回折により分
析した結果、六チタン酸カリウム繊維であることが確認
された。Impurities Al 2 O 3 and SiO 2 in raw materials used in the present invention
Etc. remain as trace components in the resulting fiber crystals. The product thus obtained was analyzed by X-ray diffraction, and it was confirmed that the product was a potassium hexatitanate fiber.
［作 用］ 本発明において使用される予めアルミナおよび／また
はシリカによって表面処理された酸化チタンと重炭酸カ
リウムに代表される炭酸水素アルカリ金属とは反応時に
どのようなメカニズムによるか定かではないが、結果と
して後述するごとく、所期の目的である繊維形状の整っ
た、しかも表面が平滑な六チタン酸カリウム繊維を安定
して製造することを可能ならしめた。[Operation] It is not clear what mechanism is used during the reaction between titanium oxide used in the present invention and surface-treated with alumina and / or silica and alkali metal bicarbonate represented by potassium bicarbonate. As a result, as will be described later, it has become possible to stably produce potassium hexatitanate fibers having an intended fiber shape and a smooth surface, which is the intended purpose.
また、本発明で添加するチタン粉末もしくは水素化チ
タン粉末は反応促進剤として作用し、チタンの酸化反応
で二酸化チタンとカリウム成分との反応を促進させ、か
つ自らもその反応に寄与する。またチタン粉末もしくは
水素化チタン粉末の添加により、上記一般式中ｎが2.5
以上好ましくは３で、従来の溶融法のように炭酸カリウ
ムと二酸化チタンの混合物を溶融させることなく焼成の
みで繊維長や繊維径の比、すなわちアスペクト比が整っ
てかつ、表面の平滑な六チタン酸カリウム繊維を得るこ
とができた。また、従来のチタン粉末もしくは水素化チ
タン粉末を添加しないで酸化チタン含有鉱石とカリウム
成分との混合物を焼成した繊維状物では繊維の成長程度
が低くかつ、その後の解繊が困難で繊維の回収率も低く
工業化出来るものではなかったが本発明にあっては予め
アルミナおよび／またはシリカによって表面処理を施し
た酸化チタンと重炭酸カリウムに代表される炭酸水素ア
ルカリ金属との混合物にチタン粉末もしくは水素化チタ
ン粉末を添加することにより、それらの点を解消向上す
ることが認められた。Further, the titanium powder or titanium hydride powder added in the present invention acts as a reaction accelerator, promotes the reaction between titanium dioxide and the potassium component in the oxidation reaction of titanium, and contributes to the reaction itself. Further, by adding titanium powder or titanium hydride powder, n in the above general formula is 2.5
As described above, preferably, the ratio of the fiber length and the fiber diameter, that is, the aspect ratio is adjusted by sintering without melting the mixture of potassium carbonate and titanium dioxide as in the conventional melting method without melting the mixture of potassium carbonate and titanium dioxide. A potassium acid fiber could be obtained. In addition, in the case of a fibrous material obtained by firing a mixture of a titanium oxide-containing ore and a potassium component without adding conventional titanium powder or titanium hydride powder, the degree of fiber growth is low, and subsequent fibrillation is difficult, so that fiber recovery is performed. However, in the present invention, titanium powder or hydrogen mixed with a mixture of titanium oxide surface-treated in advance with alumina and / or silica and an alkali metal bicarbonate represented by potassium bicarbonate was used in the present invention. It was recognized that these points could be eliminated and improved by adding titanium oxide powder.
［実施例および比較例］ 以下、本発明を実施例および比較例によりさらに詳細
に説明する。Examples and Comparative Examples Hereinafter, the present invention will be described in more detail with reference to Examples and Comparative Examples.
＜実施例１＞ 顔料用酸化チタン（本発明者等の組成分析の結果、Al
2O32.2wt％SiO20.05wt％含有、ルチルタイプ、表面処理
品）と、重炭酸カリウム（粉末状）を酸化チタンおよび
炭酸カリウムに換算したモル比が3:1の割合で混合し、
該混合物に対して5wt％のチタン粉末（−20＃品）を添
加してＶ型ブレンダーにて約15分間混合した。次いで該
混合物500gを電気炉に入れ1100℃で３時間の焼成を行っ
た。除冷後該焼成物を取り出して小割した後、３の冷
水中に浸して８時間攪拌処理を行いスラリー状とし、該
スラリーをディスパーミル（ホソカワミクロン社製）に
よって解繊して繊維状物質を分離した。<Example 1> Titanium oxide for pigment (as a result of composition analysis by the present inventors, Al
2 O 3 2.2 wt% SiO 2 0.05 wt%, rutile type, surface-treated product) and potassium bicarbonate (powder) are mixed at a molar ratio of 3: 1 in terms of titanium oxide and potassium carbonate,
5 wt% of titanium powder (-20 # product) was added to the mixture, and mixed for about 15 minutes by a V-type blender. Next, 500 g of the mixture was placed in an electric furnace and baked at 1100 ° C. for 3 hours. After cooling, the fired product is taken out and divided into small pieces, immersed in cold water (3), stirred for 8 hours to form a slurry, and the slurry is defibrated by a disper mill (manufactured by Hosokawa Micron Corporation) to remove fibrous substances. separated.
解繊分離したスラリーを100＃の篩によって残渣と繊
維物質とに篩別し、得られた100＃アンダーのスラリー
を中和した後、真空濾過法によって濾過することにより
ケーキ状物質を得、該ケーキ状物質を150〜200℃の温度
を保ちつつ乾燥し、さらに800℃に昇温して30分間熱処
理を行った。The defibrated and separated slurry is sieved with a 100 # sieve into a residue and a fibrous material. The resulting 100 # under slurry is neutralized, and then filtered by a vacuum filtration method to obtain a cake-like material. The cake-like substance was dried while maintaining the temperature at 150 to 200 ° C., and was further heated to 800 ° C. and heat-treated for 30 minutes.
かくの如くして得られた繊維は表面が平滑であり、そ
の繊維径は平均0.5μｍ、繊維長は平均50μｍでほぼ整
ったものであった。The fiber thus obtained had a smooth surface, a fiber diameter of 0.5 μm on average, and a fiber length of 50 μm on average, which was almost even.
この繊維の形状および表面の平滑性を電子顕微鏡写真
にて第１図に示す。FIG. 1 shows an electron micrograph of the shape and surface smoothness of the fiber.
＜比較例＞ 顔料用酸化チタンをアナターゼタイプの表面未処理品
（本発明者等の分析によるとアルミナおよびシリカの含
有は認められなかった。）とし、重炭酸カリウムに代え
て炭酸カリウムを用い、さらにチタン粉を添加しなかっ
た以外は実施例１と同様にして実験を行った。<Comparative Example> Titanium oxide for a pigment was an anatase type surface-untreated product (alumina and silica were not found to be contained according to analysis by the present inventors), and potassium carbonate was used instead of potassium bicarbonate. An experiment was conducted in the same manner as in Example 1 except that no titanium powder was added.
得られた繊維の繊維径は平均0.5〜1.0μｍ、繊維長は
平均10〜20μｍとバラつきがあり、かつ繊維の形状は表
面が角張っており、トゲ状を呈していた。The fiber diameter of the obtained fiber varied from 0.5 to 1.0 μm on average and the fiber length from 10 to 20 μm on average, and the fiber shape was angular and the surface was in the shape of a thorn.
この繊維の表面状態を電子顕微鏡写真にして第２図に
示す。FIG. 2 shows an electron micrograph of the surface state of the fiber.
［発明の効果］ 本発明の方法によると、得られる六チタン酸カリウム
繊維の繊維長や繊維径の比（アスペクト比）が整ってお
り、かつその表面が従来公知のものと比較してきわめて
平滑であるために、これを配合した繊維強化金属または
プラスチックなどに著しい補強性能を発揮する。また、
繊維の表面が緻密でかつ平滑であるために、その比表面
積が小さくプラスチックや軽金属などのマトリックス材
に配合する際、流動性を損なうこともなく、増粘傾向も
極めて低く抑えることができるので、加工性も優れてい
る。このことは、特にプラスチックに配合した場合、熱
膨張係数を小さくし、得られた複合材の変形を少ならし
めるため、大型成形品に使用することが可能である。[Effects of the Invention] According to the method of the present invention, the obtained potassium hexatitanate fiber has a uniform fiber length and fiber diameter ratio (aspect ratio), and its surface is extremely smooth as compared with conventionally known ones. Therefore, it exerts remarkable reinforcing performance on a fiber-reinforced metal or a plastic containing the same. Also,
Because the surface of the fiber is dense and smooth, its specific surface area is small, and when blended into a matrix material such as plastic or light metal, without impairing the fluidity, the tendency to thicken can be suppressed extremely low, Excellent workability. This can be used for large molded products, especially when blended in plastics, in order to reduce the coefficient of thermal expansion and reduce the deformation of the resulting composite.
さらに付言すると、従来の溶融法に比べ焼成法である
ため装置が簡略化され設備費が少なくてすむ利点があ
る。また焼成用にトンネル炉等を使用出来ることにより
連続焼成が可能となる。これらの点を含めて考えると低
コストでチタン酸カリウム繊維が製造出来るため、これ
までコスト面で利用分野が限られていたが、本発明によ
れば利用分野の拡大が可能になる。Furthermore, since it is a firing method as compared with the conventional melting method, there is an advantage that the apparatus is simplified and the equipment cost is reduced. Further, since a tunnel furnace or the like can be used for firing, continuous firing can be performed. Considering these points, the potassium titanate fiber can be produced at low cost, so that the field of use has been limited in terms of cost, but according to the present invention, the field of use can be expanded.
第１図は本発明の実施例１によって得られたチタン酸カ
リウム繊維の形状を示す電子顕微鏡写真であり、第２図
は比較例によって得られたチタン酸カリウム繊維の形状
を示す電子顕微鏡写真である。FIG. 1 is an electron micrograph showing the shape of the potassium titanate fiber obtained by Example 1 of the present invention, and FIG. 2 is an electron micrograph showing the shape of the potassium titanate fiber obtained by the comparative example. is there.
Claims (2)
によって表面処理を施した酸化チタンと、（ｂ）炭酸水
素アルカリ金属および（ｃ）チタン粉末および／または
水素化チタン粉末を混合し、得られた混合物を800〜120
0℃の温度域で加熱焼成後該焼成物を水または温水にて
処理して水可溶分を抽出した後、解繊することを特徴と
する六チタン酸カリウム繊維の製造方法。1. A method comprising mixing (a) titanium oxide which has been previously surface-treated with alumina and / or silica, (b) an alkali metal hydrogencarbonate, and (c) titanium powder and / or titanium hydride powder. 800-120
A method for producing a potassium hexatitanate fiber, comprising heating and firing in a temperature range of 0 ° C., treating the fired product with water or warm water to extract a water-soluble component, and then defibrating.
ある請求項（１）記載の六チタン酸カリウム繊維の製造
方法。2. The method for producing potassium hexatitanate fiber according to claim 1, wherein the alkali metal bicarbonate is potassium bicarbonate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2078941A JP2977854B2 (en) | 1990-03-29 | 1990-03-29 | Method for producing potassium hexatitanate fiber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2078941A JP2977854B2 (en) | 1990-03-29 | 1990-03-29 | Method for producing potassium hexatitanate fiber |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03279215A JPH03279215A (en) | 1991-12-10 |
| JP2977854B2 true JP2977854B2 (en) | 1999-11-15 |
Family
ID=13675911
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2078941A Expired - Fee Related JP2977854B2 (en) | 1990-03-29 | 1990-03-29 | Method for producing potassium hexatitanate fiber |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2977854B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101856991B1 (en) | 2017-11-15 | 2018-05-14 | 한국지질자원연구원 | Manufacturing method of rod-like potassium hexatitanate powder by aerosol process and heat-treatment, and rod-like potassium hexatitanate powder manufactured thereby |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8178072B2 (en) | 2007-10-15 | 2012-05-15 | Toho Titanium Co., Ltd. | Method of manufacturing alkali metal titanate |
| JP4852022B2 (en) * | 2007-11-19 | 2012-01-11 | 東邦チタニウム株式会社 | Method for producing composite oxide |
| CN106048727B (en) * | 2016-08-12 | 2018-08-28 | 南京工业大学 | The method that one step of combustion method prepares crystal whisker of hexa potassium titanate |
-
1990
- 1990-03-29 JP JP2078941A patent/JP2977854B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101856991B1 (en) | 2017-11-15 | 2018-05-14 | 한국지질자원연구원 | Manufacturing method of rod-like potassium hexatitanate powder by aerosol process and heat-treatment, and rod-like potassium hexatitanate powder manufactured thereby |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03279215A (en) | 1991-12-10 |
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