JP3315147B2 - Method for producing synthetic mica - Google Patents
Method for producing synthetic micaInfo
- Publication number
- JP3315147B2 JP3315147B2 JP11065492A JP11065492A JP3315147B2 JP 3315147 B2 JP3315147 B2 JP 3315147B2 JP 11065492 A JP11065492 A JP 11065492A JP 11065492 A JP11065492 A JP 11065492A JP 3315147 B2 JP3315147 B2 JP 3315147B2
- Authority
- JP
- Japan
- Prior art keywords
- synthetic mica
- mica
- electrode
- iron
- carbon electrode
- 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 - Lifetime
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B33/00—Silicon; Compounds thereof
- C01B33/20—Silicates
- C01B33/36—Silicates having base-exchange properties but not having molecular sieve properties
- C01B33/38—Layered base-exchange silicates, e.g. clays, micas or alkali metal silicates of kenyaite or magadiite type
- C01B33/42—Micas ; Interstratified clay-mica products
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Silicates, Zeolites, And Molecular Sieves (AREA)
Description
【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION
【０００１】[0001]
【産業上の利用分野】この発明は、断熱材、塗料、樹脂
充填材、溶接棒、潤滑剤及び化粧料等の用途に使用され
る遷移元素を含有する合成雲母の製造方法に係り、詳記
すれば内燃式溶融法による遷移元素を含有する合成雲母
の新規製造法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a synthetic mica containing a transition element, which is used for heat insulating materials, paints, resin fillers, welding rods, lubricants, cosmetics and the like. The present invention relates to a novel method for producing a synthetic mica containing a transition element by an internal combustion type melting method.
【０００２】[0002]
【従来の技術】合成雲母は、上記したように産業上種々
の用途に使用されており、次式（１）の一般式で表すこ
とができる。 Ｘ１/３〜１Ｙ２〜３Ｚ４Ｏ１０Ｆ２ （１） 上記Ｘ，Ｙ，Ｚの各位置には、下記イオンを１種若しく
は２種以上配位している。 Ｘ：Ｋ+、Ｎａ+、Ｌｉ+、Ｃａ２+、Ｂａ２+、Ｓｒ２+、
Ｒｂ + Ｙ：Ｍｇ２+、Ｆｅ２+、Ｎｉ２+、Ｔｉ２+、Ｚｎ２+、
Ｃｕ２+、Ｍｎ２+、Ａｌ３+、Ｆｅ３+、Ｃｏ３+ Ｚ：Ａｌ３+、Ｆｅ３+、Ｂ３+、Ｓｉ４+、Ｇｅ４+ 上記合成雲母は、工業的には、外熱式溶融法（ルツボ
法）若しくは内熱式溶融法によって製造されている。2. Description of the Related Art Synthetic mica is used in various industrial applications as described above, and can be represented by the following general formula (1). X 1 / 3~1 Y 2~3 Z 4 O 10 F 2 (1) above X, Y, at each position of the Z is coordinated with one or more of the following ions. X: K + , Na + , Li + , Ca 2+ , Ba 2+ , Sr 2+ ,
Rb + Y: Mg 2+ , Fe 2+ , Ni 2+ , Ti 2+ , Zn 2+ ,
Cu 2+ , Mn 2+ , Al 3+ , Fe 3+ , Co 3+ Z: Al 3+ , Fe 3+ , B 3+ , Si 4+ , Ge 4+ The synthetic mica is industrially manufactured by outside thermal melting method (Le Tsu ball method) or inner-heat melting method.
【０００３】外熱式溶融法は、雲母原料を収容したルツ
ボを、雲母の溶融点以上の温度にして溶融後、徐冷して
結晶魂を得る方法であり、内熱式溶融法は、黒鉛電極を
取り付けた鋼鉄製容器中に雲母原料を充填し、前記黒鉛
電極に通電して、雲母原料を溶融させた後、徐冷結晶化
させる方法である。[0003] outer thermal melting method, the Le tool <br/> volume containing a mica material, after melting in the temperature above the melting point of the mica, and gradually cooled
It is a method of obtaining a crystal soul , and the internal heating type melting method fills a mica raw material in a steel container equipped with a graphite electrode, energizes the graphite electrode, melts the mica raw material, and then slowly cools the crystal. It is a method to make it.
【０００４】しかしながら、 外熱式溶融法は、ルツボ
にかかる費用が高くつくため経済的でなく、そのため現
在工業的雲母の製法としては、主として内熱式溶融法が
用いられている。However, the outer thermal melting method, Le tool not economical because it takes cost costly in volume, as the method therefor current industrial mica, and inner-heat melting method is mainly used.
【０００５】しかして、内熱式溶融法は、電極材として
カーボン電極が使用されているが、カーボン電極は安価
で耐久性があるという優れた性質を持つ反面、次のよう
な２つの問題点がある。第１に、カーボンは還元剤とし
て作用する性質を持っているため、複数の酸化数を持つ
イオン（遷移元素）を成分に持つ合成雲母をカーボン電
極を用いた内燃式溶融法で製造すると、そのイオンの殆
どは最も還元された状態で合成雲母中に配位するため、
酸化数の高い状態の遷移元素を配位させようとしても、
ごく僅かの配位した合成雲母しか得られない。第２に、
カーボン電極は、溶融合成中に磨耗し、カーボン微粒子
が溶融体中に混入して得られた合成雲母の不純物となる
ため、不純物量はごく僅かではあるが、合成雲母本来の
物性が損なわれる。即ち、カーボン微粒子が混入しない
前記ルツボ法で溶融合成して得た雲母と比較すると、合
成雲母の色はカーボンによる着色のため本来の色を呈さ
ない等の違いが出てくる。In the internal heat melting method, a carbon electrode is used as an electrode material. The carbon electrode has excellent properties that it is inexpensive and durable, but has the following two problems. There is. First, since carbon has the property of acting as a reducing agent, when synthetic mica having ions (transition elements) having a plurality of oxidation numbers as components is manufactured by an internal combustion type melting method using a carbon electrode, Most of the ions coordinate in the synthetic mica in the most reduced state,
Even so is coordinated transition elements of high oxidation number state,
Only very few coordinated synthetic mica are obtained. Second,
The carbon electrode is worn during the melt synthesis, and becomes an impurity of the synthetic mica obtained by mixing the carbon fine particles into the melt. Therefore, although the amount of impurities is very small, the intrinsic physical properties of the synthetic mica are impaired. That is, when compared with mica carbon particles obtained by melt-combined by the Le Tsu ball method not mixed, the color of the synthetic mica out differences between have such a <br/> exhibit original color for coloring by carbon Come.
【０００６】[0006]
【発明が解決しようとする課題】この発明は、このよう
な内熱式溶融法に於ける従来の問題点を解消しようとす
るものであり、カーボン電極使用に伴う上記欠点を解消
した遷移元素を含有する合成雲母の新規製造方法を提供
することを目的とする。SUMMARY OF THE INVENTION An object of the present invention is to solve the conventional problems in such an internal heat melting method, and to provide a transition element which has solved the above-mentioned disadvantages associated with the use of a carbon electrode. and to provide a novel method for producing a synthetic mica containing.
【０００７】[0007]
【課題を解決するための手段】本発明者等は、内熱式溶
融法に於いて、溶融炉内が還元雰囲気とならない操業条
件を鋭意検討した結果、カーボン電極に代えて鉄、モリ
ブデン又はタングステン電極を使用することにより、上
記欠点を伴わずに支障なく遷移元素を含有する合成雲母
が製造できることを見い出し、本発明に到達した。Means for Solving the Problems The inventors of the present invention have conducted intensive studies on the operating conditions under which the inside of the melting furnace does not become a reducing atmosphere in the internal heat type melting method, and as a result, iron and metal were used instead of carbon electrodes.
The present inventors have found that a synthetic mica containing a transition element can be produced without a disadvantage without using the above-mentioned disadvantages by using a butene or tungsten electrode.
【０００８】即ち、本発明は、内熱式溶融法による遷移
元素を含有する合成雲母の製造方法に於いて、電極材と
して鉄、モリブデン又はタングステンを使用することを
特徴とする。要するに本発明は、カーボン電極に代えて
鉄、モリブデン又はタングステン電極を使用することに
よって、還元雰囲気とならず、また、合成雲母中へのカ
ーボンの混入が避けられるため、遷移元素を含有する合
成雲母本来の色を呈する雲母を製造したことを要旨とす
るものである。[0008] That is, the present invention relates to a transition by an internal heat melting method.
In a method for producing a synthetic mica containing an element, iron, molybdenum or tungsten is used as an electrode material. In short, the present invention replaces the carbon electrode
By using an iron, molybdenum or tungsten electrode , a reducing atmosphere is not obtained, and the incorporation of carbon into synthetic mica is avoided, so that the original color of the synthetic mica containing transition elements is exhibited. The gist of the present invention is that mica is produced.
【０００９】本発明による内熱式溶融法は、カーボン電
極の代わりに合成雲母の融点以上の融点を持つ鉄、モリ
ブデン又はタングステン電極を使用する以外は、従来の
内熱式溶融法と同じ方法で行えば良い。In the internal heat melting method according to the present invention, iron or metal having a melting point higher than that of synthetic mica is used instead of the carbon electrode.
The method may be the same as the conventional internal heat melting method except that a butene or tungsten electrode is used.
【００１０】三価の鉄イオンを配位させた合成雲母を製
造する場合は、電極材にも鉄を用いるのが好ましい。鉄
イオンは、二価と三価の酸化数をとるが、カーボン電極
を用いて溶融すると、鉄イオンはその殆どが還元状態の
二価のイオンとして配位し、三価の鉄イオンとしては非
常に配位しづらくなる。また二価の鉄イオンは、そのイ
オン半径から八面体位置のみに配位し、三価の鉄イオン
は、八面体位置と四面体位置の両方に配位できるから、
カーボン電極法では、ルツボ法ほど多くの鉄イオンを合
成雲母中に配位させることができない。更に三価の鉄イ
オンは紫外線吸収能を有するが、従来のカーボン電極を
用いる内熱式溶融法では、製造した鉄含有合成雲母中に
三価の鉄イオンは殆ど含まれていないため、紫外線吸収
能の高い合成雲母を製造することはできない。In the case of producing a synthetic mica in which trivalent iron ions are coordinated, it is preferable to use iron as an electrode material. Iron ions take on divalent and trivalent oxidation numbers, but when they are melted using a carbon electrode, most of the iron ions are coordinated as reduced divalent ions, which is extremely low as trivalent iron ions. Coordination becomes difficult. In addition, divalent iron ions can be coordinated only at the octahedral position from the ion radius, and trivalent iron ions can be coordinated at both the octahedral and tetrahedral positions.
The carbon electrode method, it is impossible to coordinate the numerous iron ions as Le tool ball method in synthetic mica. In addition, trivalent iron
On has an ultraviolet absorbing ability, but in the internal heat melting method using a conventional carbon electrode, since the trivalent iron ion is hardly contained in the manufactured iron-containing synthetic mica, the synthetic mica having a high ultraviolet absorbing ability is used. Cannot be manufactured.
【００１１】鉄以外のイオン、例えばＴｉ、Ｍｎ、Ｃｏ
等の遷移元素を配位させる場合も同様にカーボン電極を
用いた方法では、還元雰囲気となるために上記酸化数の
高いイオンの含有量が高い合成雲母は製造できないが、
本発明の方法によれば、酸化数の高いイオンも配位でき
るため、高いイオン含有量の合成雲母が得られる。Ions other than iron, for example, Ti, Mn, Co
Similarly, in the case of coordinating a transition element such as the above , in the method using a carbon electrode, the oxidation
Although synthetic mica with high ion content cannot be produced,
According to the method of the present invention, ions having a high oxidation number can be coordinated.
Therefore, a synthetic mica having a high ion content can be obtained.
【００１２】フッ素金雲母等の白色の合成雲母を溶融合
成する場合は、カーボン電極を用いた方法では、ルツボ
法で製造した場合ほど白さがなく、カーボンによってや
や灰色に着色する。この着色を取り除くためには、熱処
理などの後工程が必要になる。本発明によれば、カーボ
ン電極を使用していないので、上記したようなカーボン
電極使用に伴う問題点が完全に解消される。[0012] When molten synthetic white synthetic mica such as fluorine bronze mica, the method using a carbon electrode, it is not enough whiteness when produced in Le Tsu Bo method, thus and <br/> Ya to carbon Color gray. To remove this coloring, a post-process such as heat treatment is required . According to the present invention , since the carbon electrode is not used, the problems associated with the use of the carbon electrode as described above are completely solved.
【００１３】[0013]
【実施例】次に、実施例を挙げて本発明を更に説明する
が、本発明はこれら実施例に限定されない。Next, the present invention will be further described with reference to examples, but the present invention is not limited to these examples.
【００１４】実施例１ ＫＭｇ３Ｆｅ０．７５Ａｌ０．２５Ｓｉ４Ｏ１０Ｆ２ （２） 上記式（２）に示す配合組成となるように、無水ケイ
酸、酸化マグネシウム、酸化アルミニウム、ケイフッ化
カリウム、炭酸カリウム及び酸化鉄を調合し、混合し
た。次いで、この混合物約３００Ｋｇを、鉄電極にセッ
トした内燃式電気抵抗溶融炉内に収容し、約２時間通電
して溶融体を生成させた。これを自然放冷し、鉄含有合
成雲母の結晶塊約２００Ｋｇを得た。この結晶塊を粉
砕、分級し、不純物等を除去して、４５μｍ以下の鉄含
有合成雲母微粉末を得た。得られた雲母粉末の二価及び
三価の鉄イオン量と紫外線吸収能を測定し、結果を表―
１に示した。 (測定法) 鉄イオンの分析は、原子吸光法で行った。Example 1 KMg3Fe0.75Al0.25Si4O10F2 (2) Anhydrous silica is used so that the composition shown in the above formula (2) is obtained.
Acid, magnesium oxide, aluminum oxide, fluorinated silicon
Mix and mix potassium, potassium carbonate and iron oxide
Was. Next, about 300 kg of this mixture was set on an iron electrode.
Housed in a heated internal resistance melting furnace and energized for about 2 hours
To produce a melt. This is allowed to cool naturally, and
About 200 kg of crystal mass of mica was obtained. Crush this crystal mass
Crushed and classified to remove impurities, etc.
A synthetic mica fine powder was obtained. Divalent of the obtained mica powder and
The amount of trivalent iron ions and ultraviolet absorption capacity were measured, and the results
1 is shown. (Measurement method) The analysis of iron ions was performed by the atomic absorption method.
【００１５】紫外線吸収能は、雲母１に対してヒマシ油
４の割合で混練し、ガラス板上に厚さ１０μｍ塗布し、
自記分光光度計（日立製作所(株)製「Ｕ−３２１０」）
で波長３００ｎｍの吸光度を測定することにより行っ
た。[0015] The ultraviolet absorbing ability is kneaded at a ratio of castor oil 4 to mica 1 and applied to a glass plate at a thickness of 10 µm.
Self-recording spectrophotometer (“U-3210” manufactured by Hitachi, Ltd. )
By measuring the absorbance at a wavelength of 300 nm.
【００１６】比較例１ 電極にカーボン電極を使用する以外は、実施例１と同様
に行って鉄含有合成雲母の微粉末を得た。得られた鉄含
有合成雲母の二価及び三価の鉄イオン量と紫外線吸収能
を測定し、結果を表―１に併記した。Comparative Example 1 Fine powder of iron-containing synthetic mica was obtained in the same manner as in Example 1 except that a carbon electrode was used as the electrode. The amount of divalent and trivalent iron ions and the ultraviolet absorbing ability of the obtained iron-containing synthetic mica were measured, and the results are shown in Table-1.
【００１７】[0017]
【表―１】 上記表―１から、本発明の方法により鉄電極を使用する
と、カーボン電極を使用した場合と比べて、三価の鉄イ
オンの含有量が高く、紫外線吸収能も高い合成雲母が得
られることがわかる。 [Table-1] From Table 1 above, when an iron electrode is used according to the method of the present invention, compared to the case where a carbon electrode is used, a synthetic mica having a high content of trivalent iron ions and a high ultraviolet absorbing ability can be obtained. Understand.
【００１８】実施例２ ＫＭｇ２．７Ｔｉ０．３ＡｌＳｉ３Ｏ１０Ｆ２ （３） 上記式（３）に示す配合組成となるように、無水ケイ
酸、酸化マグネシウム、酸化アルミニウム、ケイフッ化
カリウム、炭酸カリウム及び酸化チタンの各原料を調合
し、混合した。以下電極としてモリブデン電極を使用す
る以外は、実施例１と同様にして、チタン含有合成雲母
粉体を得た。得られた雲母粉末の色及びチタン含有量を
測定し、結果を表―２に示した。[0018]Example 2 KMg2.7Ti0.3AlSi3O10F2 (3) The above formula (3Anhydrous silica to obtain the composition shown in
Acid, magnesium oxide, aluminum oxide, fluorinated silicon
Mixing raw materials of potassium, potassium carbonate and titanium oxide
And mixed. In the following, molybdenum electrodes are used.
The same procedure as in Example 1 was followed, except that titanium-containing synthetic mica was used.
A powder was obtained. The color and titanium content of the obtained mica powder
Measure and display the results2It was shown to.
【００１９】比較例２ 電極にカーボン電極を使用する以外は、実施例２と同様
にして、チタン含有合成雲母の粉末を得た。この粉末の
色及びチタン含有量を測定し、結果を表―２に併記し
た。Comparative Example 2 A titanium-containing synthetic mica powder was obtained in the same manner as in Example 2 except that a carbon electrode was used as the electrode. The color and titanium content of this powder were measured, and the results are shown in Table- 2 .
【００２０】[0020]
【表―２】 上記表―２から、カーボン電極を使用しない本発明の方
法によれば、色が白く、チタン含有量の大きな合成雲母
が得られることがわかる。[Table-2] From Table 2 above, it can be seen that according to the method of the present invention without using a carbon electrode, a synthetic mica having a white color and a large titanium content can be obtained.
【００２１】実施例３ ＫＭｇ２．５Ｃｏ０．５ＡｌＳｉ３Ｏ１０Ｆ２ （４） 上記式（４）に示す配合組成で、電極としてタングステ
ン電極を使用する以外は、実施例１と同様にして、コバ
ルト含有合成雲母の粉末を得た。得られた雲母粉末の色
及びコバルト含有量を測定し、結果を表―３に示した。[0021]Example 3 KMg2.5Co0.5AlSi3O10F2 (4) With the composition shown in the above formula (4), Tungste
In the same manner as in Example 1 except that
Thus, a powder of synthetic mica containing lactate was obtained. The color of the obtained mica powder
And the cobalt content were measured, and the results are shown in Table-3.
【００２２】比較例３ 電極にカーボン電極を使用する以外は、実施例３と同様
にして、コバルト含有合成雲母粉末を得た。この粉末の
色及びコバルト含有量を測定し、結果を表―３に併記し
た。Comparative example3 Same as Example 3 except that a carbon electrode is used for the electrode
Thus, a cobalt-containing synthetic mica powder was obtained. Of this powder
Measure color and cobalt content and display results-3Together with
Was.
【００２３】[0023]
【表―３】 上記表―３から、カーボン電極を使用しない本発明の方
法によれば、鮮やかな色調を呈し、コバルト含有量の大
きな合成雲母が得られることがわかる。[Table-3] From the above Table 3, it can be seen that according to the method of the present invention without using a carbon electrode, a synthetic mica having a vivid color tone and a large cobalt content can be obtained.
【００２４】[0024]
【作用】本発明によれば、還元力のあるカーボン電極を
使用せずに、還元力のない鉄、モリブデン又はタングス
テン電極を使用しているので、遷移元素を含む雲母を合
成する場合に、複数の酸化数を持つイオンをそのまま合
成雲母中に配位させることができる。また、鉄、モリブ
デン又はタングステン電極は、カーボン電極のように溶
融合成中に電極の微粉末が合成雲母中に混入する恐れは
ないので、得られた合成雲母の外観が悪化するのが避け
られる。According to the present invention, iron, molybdenum or tungsten having no reducing power is used without using a carbon electrode having reducing power.
Since the ten electrodes are used, when synthesizing mica containing a transition element, ions having a plurality of oxidation numbers can be directly coordinated in the synthetic mica. Also iron, molybdenum
The den or tungsten electrode does not have a risk that the fine powder of the electrode is mixed into the synthetic mica during the melt synthesis unlike the carbon electrode, so that the appearance of the obtained synthetic mica can be avoided from being deteriorated.
【００２５】[0025]
【効果】以上述べた如く、本発明によれば、外熱式溶融
法よりも生産性、経済性の高い内熱式溶融法によって、
カーボン電極を使用せずに遷移元素を含有する合成雲母
を製造することが可能となり、遷移元素が酸化数の高い
状態で多く配位した合成雲母を製造することができる。
特に、鉄含有合成雲母を製造する場合は、三価の鉄イオ
ン含有量が多くなるため、紫外線吸収能の優れた合成雲
母が製造できる。また、本発明は、得られた雲母にカー
ボンが混入されることはないので、雲母本来の色調を呈
する雲母粉末を得ることができる。As described above, according to the present invention, the internal heat melting method is more productive and economical than the external heat melting method.
It is possible to produce a synthetic mica containing a transition element without using a carbon electrode, and it is possible to produce a synthetic mica in which a large number of transition elements are coordinated in a state of a high oxidation number.
In particular, when producing an iron-containing synthetic mica, the content of trivalent iron ions increases, so that a synthetic mica having excellent ultraviolet absorbing ability can be produced. Further, the present invention, since the carbon in the obtained mica will not be mixed, the original color mica coloration
Mica powder can be obtained.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 鈴村 亮 東京都千代田区四番町五番地九 トピー 工業株式会社本社内 (56)参考文献 特開 昭51−123267（ＪＰ，Ａ) 特開 昭63−242914（ＪＰ，Ａ) 米国特許3443891（ＵＳ，Ａ) 米国特許3154381（ＵＳ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) C01B 33/00 - 39/54 ＣＡ（ＳＴＮ) ＷＰＩ／Ｌ（ＱＵＥＳＴＥＬ)──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Ryo Suzumura 5th Nine, Yobancho, Chiyoda-ku, Tokyo Topy Industries, Ltd. (56) References JP-A-51-123267 (JP, A) JP-A-63 -242914 (JP, A) U.S. Pat. No. 3,443,891 (US, A) U.S. Pat. No. 3,154,381 (US, A) (58) Fields investigated (Int. Cl. 7 , DB name) C01B 33/00-39/54 CA (STN ) WPI / L (QUESTEL)
Claims (3)
於いて、電極材として鉄、モリブデン又はタングステン
を使用したことを特徴とする遷移元素を含有する合成雲
母の製造方法。In a method for producing synthetic mica by an internal heat melting method, iron, molybdenum or tungsten is used as an electrode material.
A method for producing synthetic mica containing a transition element , characterized by using :
の合成雲母の製造方法。2. The method according to claim 1, wherein said electrode is an iron electrode.
求項２に記載の製造方法。3. The method according to claim 2 , wherein the synthetic mica is an iron-containing synthetic mica.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11065492A JP3315147B2 (en) | 1992-03-21 | 1992-03-21 | Method for producing synthetic mica |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11065492A JP3315147B2 (en) | 1992-03-21 | 1992-03-21 | Method for producing synthetic mica |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05270815A JPH05270815A (en) | 1993-10-19 |
| JP3315147B2 true JP3315147B2 (en) | 2002-08-19 |
Family
ID=14541140
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11065492A Expired - Lifetime JP3315147B2 (en) | 1992-03-21 | 1992-03-21 | Method for producing synthetic mica |
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| Country | Link |
|---|---|
| JP (1) | JP3315147B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1181139C (en) * | 1999-11-30 | 2004-12-22 | 大塚化学株式会社 | Resin composition and flexible printed circuit board |
| CN102951653B (en) * | 2011-08-31 | 2014-09-10 | 吕宝林 | Synthetic fluorophlogopite and preparation method thereof |
-
1992
- 1992-03-21 JP JP11065492A patent/JP3315147B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH05270815A (en) | 1993-10-19 |
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