JPH0458410B2 - - Google Patents
Info
- Publication number
- JPH0458410B2 JPH0458410B2 JP24339887A JP24339887A JPH0458410B2 JP H0458410 B2 JPH0458410 B2 JP H0458410B2 JP 24339887 A JP24339887 A JP 24339887A JP 24339887 A JP24339887 A JP 24339887A JP H0458410 B2 JPH0458410 B2 JP H0458410B2
- Authority
- JP
- Japan
- Prior art keywords
- particles
- whisker
- needle
- calcium fluoride
- calcium
- 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
Links
- 239000002245 particle Substances 0.000 claims description 15
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 claims description 13
- 229910001634 calcium fluoride Inorganic materials 0.000 claims description 12
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 10
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 8
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims description 6
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 claims description 5
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 5
- 239000001569 carbon dioxide Substances 0.000 claims description 4
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 2
- 239000000920 calcium hydroxide Substances 0.000 description 5
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 5
- 239000013078 crystal Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000002441 X-ray diffraction Methods 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 229910004261 CaF 2 Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 210000003298 dental enamel Anatomy 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000010436 fluorite Substances 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 229910000040 hydrogen fluoride Inorganic materials 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000012779 reinforcing material Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Landscapes
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、製鉄業における融剤、ガラスおよび
ホウロウ工業における原料、オプトセラミツクス
用材料などとして多く使用されているフツ化カル
シウム、とくに針状粒子フツ化カルシウム（ウイ
スカー状）とその生成方法に関するものである。Detailed Description of the Invention (Field of Industrial Application) The present invention is directed to calcium fluoride, which is widely used as a flux in the steel industry, as a raw material in the glass and enamel industry, as a material for opto-ceramics, etc., especially in acicular particles. This article relates to calcium fluoride (whisker-like) and its production method.
（従来技術）
フツ化カルシウムは天然にはホタル石として産
出し、CaF2の純度および粒径によつて各種グレ
ードに分けられ、それぞれの用途に応じて使用さ
れている。また合成品も光学材料等として様々な
純度、粒子径のものが製造されている。(Prior Art) Calcium fluoride is naturally produced as fluorite, and is divided into various grades depending on the purity of CaF 2 and particle size, and each grade is used according to its purpose. Synthetic products are also manufactured in various purity and particle sizes as optical materials and the like.
（発明が解決しようとする問題点）
しかしながら直径１〜100μｍ、単径0.1〜5μｍ
の粒子で、しかも単結晶の様を呈した針状粒子フ
ツ化カルシウムは従来の工業生産にはない。(Problem to be solved by the invention) However, the diameter is 1 to 100 μm, and the single diameter is 0.1 to 5 μm.
Needle-shaped particles of calcium fluoride that look like single crystals are not available in conventional industrial production.
したがつて本発明の技術的課題は直径１〜
100μｍ、単径0.1〜5μｍの針状粒子フツ化カルシ
ウムを提供することを目的とするものである。 Therefore, the technical problem of the present invention is to
The object of the present invention is to provide calcium fluoride acicular particles having a diameter of 100 μm and a single diameter of 0.1 to 5 μm.
（問題点を解決するための手段）
以上のような技術的課題を解決する本発明の技
術的手段は、炭酸ガスまたは炭酸ガスを含むガス
体が吹き込まれている水に、水酸化カルシウム水
溶液（各種薬品たとえばサツカロース等で水酸化
カルシウムの溶解度を上げた溶液を含む）を適切
な流量調整のうえ滴下あるいは注入し続け、炭酸
カルシウム針状粒子（ウイスカー状）を連続生成
させ、それをフツ化水素酸と反応させとくに針状
粒子フツ化カルシウム（ウイスカー状）を生成さ
せることである。(Means for Solving the Problems) The technical means of the present invention for solving the above-mentioned technical problems is to add a calcium hydroxide aqueous solution ( Various chemicals (including solutions in which the solubility of calcium hydroxide is increased with sutucarose, etc.) are continuously dripped or injected with appropriate flow rate adjustment to continuously generate calcium carbonate needle-like particles (whiskers), which are then mixed with hydrogen fluoride. Specifically, calcium fluoride particles (whiskers) are formed by reacting with an acid.
（発明の効果）
この方法によつて従来にない形状を有するウイ
スカー状針状粒子フツ化カルシウムが生成でき、
この針状を利用して多孔質のフツ化カルシウム成
形体、シート状フツ化カルシウム、プラスチツク
等への充填材、補強材あるいは光学材料等、従来
と異なつた応用、展開が期待できる。(Effect of the invention) By this method, whisker-like acicular particle calcium fluoride having an unprecedented shape can be produced,
Utilizing this acicular shape, we can expect applications and developments that are different from conventional ones, such as porous calcium fluoride molded bodies, sheet-like calcium fluoride, fillers for plastics, reinforcing materials, and optical materials.
また、針状粒子の大きさの調節については、適
切な操作条件を選択することにより、たとえば滴
下あるいは注入する水酸化カルシウムの流量、反
応中の温度を適切に選ぶことにより簡単にでき
る。 Further, the size of the acicular particles can be easily adjusted by selecting appropriate operating conditions, for example, by appropriately selecting the flow rate of calcium hydroxide to be dropped or injected and the temperature during the reaction.
（実施例）
以下、実施例にもとづき、本発明を具体的に説
明する。(Examples) Hereinafter, the present invention will be specifically described based on Examples.
実施例 １
水酸化カルシウムスラリーをフイルターにより
ろ過し、水酸化カルシウム水溶液を得、これを
1.5／minの流量で、75℃の熱水がはいつてい
る反応器に滴下し続け、炭酸カルシウム針状粒子
（ウイスカー状）を連続生成させる。この時の反
応器に吹き込んでいるガスは、炭酸ガス濃度約30
％（Vo1％）の炭酸ガス混合体である。Example 1 Calcium hydroxide slurry was filtered to obtain a calcium hydroxide aqueous solution, which was
At a flow rate of 1.5/min, the solution is continuously dripped into a reactor containing hot water at 75°C to continuously generate calcium carbonate needle-like particles (whiskers). The gas being blown into the reactor at this time has a carbon dioxide concentration of approximately 30
% (Vo1%) carbon dioxide gas mixture.
生成した炭酸カルシウム針状粒子（ウイスカー
状）１ｇに対して約4.3％フツ化水素酸11mlの割
合で白金製容器で反応させ、ホツトプレート
（200℃）にて蒸発乾固させ、さらに電気乾燥器に
て、約100℃で乾燥してサンプルＬ−１を得る。
第１図にこのサンプルＬ−１のSEMによる観察
写真を示す。また第２図はサンプルＬ−１のＸ線
回析パターンで、フツ化カルシウム結晶であるこ
とを示している。 1 g of calcium carbonate acicular particles (whiskers) produced were reacted with 11 ml of approximately 4.3% hydrofluoric acid in a platinum container, evaporated to dryness on a hot plate (200°C), and then dried in an electric dryer. The sample L-1 is obtained by drying at about 100°C.
FIG. 1 shows an SEM photograph of this sample L-1. Further, FIG. 2 shows the X-ray diffraction pattern of sample L-1, showing that it is a calcium fluoride crystal.
第１図の図面に代る写真は、結晶の構造を示
す。第２図は、サンプルＬ−１のＸ線回析パター
ン図である。
The photograph in place of the drawing in FIG. 1 shows the structure of the crystal. FIG. 2 is an X-ray diffraction pattern diagram of sample L-1.
Claims (1)
（ウイスカー状）である合成されたフツ化カルシ
ウム。 ２ 炭酸ガスまたは炭酸ガスを含むガス体が吹き
込まれている水に、水酸化カルシウム水溶液を適
切な流量調整のうえ、滴下あるいは注入し続け、
炭酸カルシウム針状粒子（ウイスカー状）を連続
生成させ、次いで生成した炭酸カルシウム針状粒
子（ウイスカー状）とフツ化水素酸とを反応さ
せ、針状粒子（ウイスカー状）のフツ化カルシウ
ムを生成させることを特徴とする生成方法。[Claims] 1. Synthesized calcium fluoride that is needle-like particles (whisker-like) with a major axis of 1 to 100 μm and a single diameter of 0.1 to 5 μm. 2. Continuously dripping or injecting an aqueous calcium hydroxide solution into water into which carbon dioxide gas or a gas containing carbon dioxide gas is blown, after adjusting the flow rate appropriately.
Continuously generate calcium carbonate needle-like particles (whisker-like), then react the generated calcium carbonate needle-like particles (whisker-like) with hydrofluoric acid to produce calcium fluoride in the form of needle-like particles (whisker-like). A generation method characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24339887A JPS6483514A (en) | 1987-09-28 | 1987-09-28 | Needle-like particle calcium fluoride and formation thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24339887A JPS6483514A (en) | 1987-09-28 | 1987-09-28 | Needle-like particle calcium fluoride and formation thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6483514A JPS6483514A (en) | 1989-03-29 |
| JPH0458410B2 true JPH0458410B2 (en) | 1992-09-17 |
Family
ID=17103272
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24339887A Granted JPS6483514A (en) | 1987-09-28 | 1987-09-28 | Needle-like particle calcium fluoride and formation thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6483514A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4761368B2 (en) * | 2006-02-21 | 2011-08-31 | 河西工業株式会社 | Injection mold |
-
1987
- 1987-09-28 JP JP24339887A patent/JPS6483514A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6483514A (en) | 1989-03-29 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |