JPS5857392B2 - Manufacturing method of silicon carbide powder coated with aluminum fine powder - Google Patents
Manufacturing method of silicon carbide powder coated with aluminum fine powderInfo
- Publication number
- JPS5857392B2 JPS5857392B2 JP55148478A JP14847880A JPS5857392B2 JP S5857392 B2 JPS5857392 B2 JP S5857392B2 JP 55148478 A JP55148478 A JP 55148478A JP 14847880 A JP14847880 A JP 14847880A JP S5857392 B2 JPS5857392 B2 JP S5857392B2
- Authority
- JP
- Japan
- Prior art keywords
- aluminum
- solvent
- powder
- silicon carbide
- soluble
- 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
Description
【発明の詳細な説明】
本発明は炭化珪素（以下ＳｉＣとする）焼結体の焼結に
必要な焼結助剤、特に溶媒に可溶のアルミニウム化合物
を使用して表面にアルミニウム微粉末を被覆したＳｉＣ
粉末の製造方医に関する。Detailed Description of the Invention The present invention uses a sintering aid necessary for sintering a silicon carbide (hereinafter referred to as SiC) sintered body, particularly an aluminum compound soluble in a solvent, to coat fine aluminum powder on the surface. coated SiC
Concerning powder manufacturing methods.
ＳｉＣ焼結体は耐摩耗性、耐薬品性、高温強度に優れた
材料であり、ターこン部材、自動車部品、熱交換器等の
高温構造材料やメカニカルシール材料としての用途があ
る。SiC sintered bodies are materials with excellent wear resistance, chemical resistance, and high-temperature strength, and are used as high-temperature structural materials such as turret parts, automobile parts, and heat exchangers, and as mechanical seal materials.
ＳｉＣ焼結体はアルミニウム系やホウ素系の焼結助剤を
添加してＳｉＣ粉末を焼結して製造されている。SiC sintered bodies are manufactured by adding aluminum-based or boron-based sintering aids and sintering SiC powder.
焼結助剤はホウ素系よりアルミニウム系の方が強度が高
くなることが知られている。It is known that aluminum-based sintering aids have higher strength than boron-based sintering aids.
しかし従来より知られているアルミニウム系の焼結助剤
すなわち金属アルミニウム、アルミナ、炭化アルミニウ
ム、窒化アルミニウム、ケイ炭化アルミニウムはいずれ
も溶媒不溶の粉末であり、添加量が少ないことからＳｉ
Ｃ粉末中に均一に分散させることが困難で、ＳｉＣ粉末
を焼結した場合、焼結体の組織が不均一になる問題があ
る。However, conventionally known aluminum-based sintering aids, such as metal aluminum, alumina, aluminum carbide, aluminum nitride, and aluminum silica carbide, are all solvent-insoluble powders, and because the amount added is small, Si
It is difficult to uniformly disperse SiC powder in C powder, and when SiC powder is sintered, there is a problem that the structure of the sintered body becomes non-uniform.
本発明はＳｉＣ焼結体の組織を均一にするために、溶媒
に可溶のアルミニウム化合物を用いて表面にアルミニウ
ム微粉末を被覆したＳｉＣ粉末を製造する方法を提供す
ることを目的とするものである。An object of the present invention is to provide a method for producing SiC powder whose surface is coated with fine aluminum powder using a solvent-soluble aluminum compound in order to make the structure of the SiC sintered body uniform. be.
本発明者は溶媒に可溶のアルミニウム化合物について種
々検討した結果、硝酸アルミニウム、ヨウ化アルミニウ
ム、硫酸アルミニウム、硫酸グアニジニウムアルミニウ
ム、硫酸ルビジウムアルミニウム、酢酸アルミニウムま
たはこれらの水和物は不活性ガス雰囲気中で加熱すると
容易に分解してアルミニウムを遊離することを見い出し
た。As a result of various studies on aluminum compounds soluble in solvents, the present inventor found that aluminum nitrate, aluminum iodide, aluminum sulfate, guanidinium aluminum sulfate, rubidium aluminum sulfate, aluminum acetate, or their hydrates can be used in an inert gas atmosphere. It was discovered that when heated inside, it easily decomposes and liberates aluminum.
本発明はＳｉＣ粉末、溶媒に可溶のアルミニウム化合物
および溶媒を混合し、溶媒に可溶のアルミニウム化合物
の分解温度以下の温度で乾燥し、ついで真空中、窒素雰
囲気中または不活性ガス雰囲気中かつ溶媒に可溶のアル
ミニウム化合物の分解温度以上の温度で加熱処理するこ
とを特徴とするアルミニウム微粉末被覆ＳｉＣ粉末の製
造方法に関する。The present invention involves mixing SiC powder, a solvent-soluble aluminum compound, and a solvent, drying the mixture at a temperature below the decomposition temperature of the solvent-soluble aluminum compound, and then drying the mixture in a vacuum, a nitrogen atmosphere, or an inert gas atmosphere. The present invention relates to a method for producing SiC powder coated with fine aluminum powder, which is characterized by heat treatment at a temperature equal to or higher than the decomposition temperature of an aluminum compound soluble in a solvent.
なお本発明において使用される溶媒に可溶のアルミニウ
ム化合物は前記でも説明したが、硝酸アルミニウム、ヨ
ウ化アルミニウム、硫酸アルミニウム、硫酸グアニジウ
ムアルミニウム、硫酸ルビジウムアルミニウム、酢酸ア
ルミニウム等またはこれらの水和物が使用され、また溶
媒には水、アルコール、エーテル、ケトン等が使用され
る。Note that the aluminum compounds soluble in the solvent used in the present invention are as described above, and include aluminum nitrate, aluminum iodide, aluminum sulfate, guanidium aluminum sulfate, rubidium aluminum sulfate, aluminum acetate, etc., or hydrates thereof. is used, and water, alcohol, ether, ketone, etc. are used as the solvent.
溶媒に可溶のアルミニウム化合物の分解温度は各々使用
するアルミニウム化合物によって異なる。The decomposition temperature of an aluminum compound soluble in a solvent differs depending on the aluminum compound used.
例えば硫酸アルミニウム１８水和物は９０℃程度で分解
し、硫酸アルミニウム無水物は８００℃位の温度でなけ
れば分解しない。For example, aluminum sulfate 18 hydrate decomposes at a temperature of about 90°C, and aluminum sulfate anhydride does not decompose at a temperature of about 800°C.
またＳｉＣ粉末、溶媒に可溶のアルミニウム化合物およ
び溶媒の混合物の乾燥は空気中で行なっても差支えない
が、真空中、窒素雰囲気中またはアルゴン、ヘリウム等
の不活性ガス雰囲気中で行なうことが好ましい。Although the mixture of SiC powder, solvent-soluble aluminum compound, and solvent may be dried in the air, it is preferable to dry it in a vacuum, a nitrogen atmosphere, or an inert gas atmosphere such as argon or helium. .
ただし加熱処理の場合は真空中、窒素雰囲気中またはア
ルゴン、ヘリウム等の不活性ガス雰囲気中で行なうこと
が必要である。However, in the case of heat treatment, it is necessary to perform it in a vacuum, a nitrogen atmosphere, or an inert gas atmosphere such as argon or helium.
空気中で行なうと溶媒に可溶のアルミニウム化合物がア
ルミニウムでなくアルミナとなるため本発明の効果は得
られない。If it is carried out in air, the effect of the present invention cannot be obtained because the aluminum compound soluble in the solvent becomes alumina instead of aluminum.
さらにＳｉＣ粉末、溶媒に可溶のアルミニウム化合物お
よび溶媒の配合割合は焼結体の密度に応じて変えるもの
とし持に制限はない。Further, the blending ratio of the SiC powder, the solvent-soluble aluminum compound, and the solvent is not limited, and may be varied depending on the density of the sintered body.
以下実施例により本発明を説明する。The present invention will be explained below with reference to Examples.
実施例 １
平均粒径Ｑ、５７ｚｍのＳｉＣ粉末１０（Ｂｉ’と１９
重量％の硫酸アルミニウム水溶液１００ｇをボールミル
で３０分混合後１００°Ｃで乾燥した。Example 1 SiC powder 10 (Bi' and 19
100 g of aqueous aluminum sulfate solution was mixed in a ball mill for 30 minutes and then dried at 100°C.
次にアルゴン中９００℃で１時間加熱した。It was then heated at 900° C. for 1 hour in argon.
この結果ＳｉＣ粉末の表面に１．５重量％のアルミニウ
ム微粉末が被覆されていた。As a result, the surface of the SiC powder was coated with 1.5% by weight of fine aluminum powder.
また硝酸イオンは検出されなかった。Moreover, nitrate ions were not detected.
実施例 ２
平均ね径１μｍのＳｉＣ粉末１０（ｌと１９．３重量％
の硫酸ルビジウムアルミニウム１２水和物水溶液１００
９をボールミルで３０分混合後アルゴン中８００℃で１
時間加熱した。Example 2 SiC powder 10 (l and 19.3% by weight) with an average diameter of 1 μm
rubidium aluminum sulfate dodecahydrate aqueous solution 100
After mixing 9 in a ball mill for 30 minutes, 1 at 800℃ in argon.
heated for an hour.
この結果ＳｉＣ粉末の表面に１．０重量％のアルミニウ
ム微粉末が被覆されていた。As a result, the surface of the SiC powder was coated with 1.0% by weight of fine aluminum powder.
またルビジウムは検出されなかった。Also, rubidium was not detected.
実施例 ３
平均ね径０．５μｍのＳｉＣ粉末１００ｇと２０．９重
量％の硝酸アルミニウム９水和物エタノール溶液１００
ｇをボールミルで３０分混合後、窒素中２００℃で加熱
した。Example 3 100 g of SiC powder with an average diameter of 0.5 μm and 100 g of 20.9 wt% aluminum nitrate nonahydrate ethanol solution
After mixing in a ball mill for 30 minutes, the mixture was heated at 200° C. in nitrogen.
この結果５ｉＣａ宋り表面に１．５重量％のアルミニウ
ムが被覆されていた。As a result, the surface of the 5iCa was coated with 1.5% by weight of aluminum.
実施例 ４
平均ね径１μｍのＳｉＣ粉末ｉｏｏｇと第１表に示す溶
媒に可溶のアルミニウム化合物水溶液１００ｇをボール
ミルで３０分混合後アルゴン中で１時間加熱した。Example 4 SiC powder ioog having an average diameter of 1 μm and 100 g of an aqueous solution of an aluminum compound soluble in the solvent shown in Table 1 were mixed in a ball mill for 30 minutes and then heated in argon for 1 hour.
この結果を第１表に示す。本発明によれば溶媒に可溶の
アルミニウム化合物を用いて表面にアルミニウム微粉末
を被覆したＳｉＣ粉末を容易に製造することができる。The results are shown in Table 1. According to the present invention, SiC powder whose surface is coated with aluminum fine powder can be easily produced using a solvent-soluble aluminum compound.
またアルミニウム微粉末は５ｉｆｔ分末の表面に均一に
分散することができるため、ＳｉＣ粉末を焼結した場合
その焼結体の組織を均一にすることが可能である。Further, since the fine aluminum powder can be uniformly dispersed on the surface of the 5ift powder, when SiC powder is sintered, it is possible to make the structure of the sintered body uniform.
Claims (1)
よび溶媒を混合し、溶媒に可溶のアルミニウム化合物の
分解温度以下の温度で乾燥し、ついで真空中、窒素雰囲
気中または不活性ガス雰囲気中かつ溶媒に可溶のアルミ
ニウム化合物の分解温度以上の温度で加熱処理すること
を特徴とするアルミニウム微粉末被覆炭化珪素粉末の製
造方法。1. Mix silicon carbide powder, a solvent-soluble aluminum compound, and a solvent, dry at a temperature below the decomposition temperature of the solvent-soluble aluminum compound, and then dry in vacuum, in a nitrogen atmosphere, or in an inert gas atmosphere and in a solvent. 1. A method for producing silicon carbide powder coated with fine aluminum powder, the method comprising heating at a temperature higher than the decomposition temperature of an aluminum compound soluble in aluminum.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP55148478A JPS5857392B2 (en) | 1980-10-22 | 1980-10-22 | Manufacturing method of silicon carbide powder coated with aluminum fine powder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP55148478A JPS5857392B2 (en) | 1980-10-22 | 1980-10-22 | Manufacturing method of silicon carbide powder coated with aluminum fine powder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5771868A JPS5771868A (en) | 1982-05-04 |
| JPS5857392B2 true JPS5857392B2 (en) | 1983-12-20 |
Family
ID=15453647
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP55148478A Expired JPS5857392B2 (en) | 1980-10-22 | 1980-10-22 | Manufacturing method of silicon carbide powder coated with aluminum fine powder |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5857392B2 (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5926972A (en) * | 1982-08-06 | 1984-02-13 | 松下電器産業株式会社 | Manufacture of nitride carbide ceramic |
| JPS6011269A (en) * | 1983-06-27 | 1985-01-21 | 松下電器産業株式会社 | Manufacture of nitride, carbide ceramic |
| JPS60210574A (en) * | 1984-03-30 | 1985-10-23 | 工業技術院長 | Manufacture of high strength heat-resistant ceramic sinteredbody |
| JPS61186267A (en) * | 1985-02-14 | 1986-08-19 | 工業技術院長 | Manufacture of beta-sialon sintered body |
| US5080879A (en) * | 1988-12-01 | 1992-01-14 | Alcan International Limited | Process for producing silicon carbide platelets and the platelets so produced |
| JP2693285B2 (en) * | 1991-05-30 | 1997-12-24 | 株式会社クボタ | Control lever device |
| GB0007731D0 (en) | 2000-03-31 | 2000-05-17 | Altro Ltd | Coloured silicon carbide |
| CA3113924A1 (en) * | 2018-09-28 | 2020-04-02 | Fujimi Incorporated | Coated silicon carbide particle powder |
-
1980
- 1980-10-22 JP JP55148478A patent/JPS5857392B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5771868A (en) | 1982-05-04 |
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