JP2016216820A - 銀がコーティングされたカーボンナノチューブを含有する電気接点材料の製造方法 - Google Patents
銀がコーティングされたカーボンナノチューブを含有する電気接点材料の製造方法 Download PDFInfo
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Abstract
【解決手段】(a)カーボンナノチューブを硝酸銀溶液中に入れて超音波分散及び酸処理する段階と、(b)カーボンナノチューブを洗浄する段階と、(c)洗浄されたカーボンナノチューブを塩化スズと塩酸の混合溶液及び塩化パラジウムと塩酸の混合溶液と混合し、超音波を加えてカーボンナノチューブの表面にスズとパラジウムを結合させる段階と、(d)硝酸銀水溶液とアンモニア水溶液を無色になるまで混合し、カーボンナノチューブを混合する段階と、(e)混合溶液にグリオキシル酸水溶液と水酸化ナトリウム水溶液を混合し、脱イオン水で洗浄して銀がコーティングされたカーボンナノチューブを製造する段階と、(f)銀がコーティングされたカーボンナノチューブと金属が混合された合金を混合して粉末混合体を製造する段階とを含む。
【選択図】図8
Description
<実験例>
Claims (14)
- (a)カーボンナノチューブを硝酸銀溶液中に入れて超音波分散及び酸処理する段階と、
(b)前記段階(a)で超音波分散及び酸処理されたカーボンナノチューブを洗浄する段階と、
(c)前記洗浄されたカーボンナノチューブを塩化スズと塩酸の混合溶液及び塩化パラジウムと塩酸の混合溶液と順次混合し、その後超音波を加えて前記カーボンナノチューブの表面にスズとパラジウムを結合させる段階と、
(d)硝酸銀水溶液とアンモニア水溶液を無色になるまで混合し、その後前記段階(c)で製造されたカーボンナノチューブを混合する段階と、
(e)前記段階(d)で製造された混合溶液にグリオキシル酸水溶液と水酸化ナトリウム水溶液を混合し、その後脱イオン水で洗浄して銀がコーティングされたカーボンナノチューブを製造する段階と、
(f)前記銀がコーティングされたカーボンナノチューブと金属が混合された合金を混合して粉末混合体を製造する段階と、を含むことを特徴とする銀がコーティングされたカーボンナノチューブを含有する電気接点材料の製造方法。 - 前記段階(f)において、前記カーボンナノチューブと混合される合金を構成する金属は、伝導度が14.3MS/m以上である、請求項1に記載の銀がコーティングされたカーボンナノチューブを含有する電気接点材料の製造方法。
- 前記合金は、銅、ニッケル及び金からなる群から選択される1種以上の金属が混合されたものである、請求項1又は2に記載の銀がコーティングされたカーボンナノチューブを含有する電気接点材料の製造方法。
- (g)前記粉末混合体を超音波分散し、真空乾燥する段階と、
(h)前記真空乾燥した粉末混合体を焼結する段階と、をさらに含む、請求項1に記載の銀がコーティングされたカーボンナノチューブを含有する電気接点材料の製造方法。 - 前記段階(b)において、前記カーボンナノチューブをPH7になるまで洗浄する、請求項1に記載の銀がコーティングされたカーボンナノチューブを含有する電気接点材料の製造方法。
- 前記段階(e)において、前記グリオキシル酸水溶液と前記水酸化ナトリウム水溶液をPH9になるまで混合する、請求項1に記載の銀がコーティングされたカーボンナノチューブを含有する電気接点材料の製造方法。
- 前記グリオキシル酸水溶液と前記水酸化ナトリウム水溶液が混合された混合溶液を脱イオン水でPH7になるまで洗浄する、請求項6に記載の銀がコーティングされたカーボンナノチューブを含有する電気接点材料の製造方法。
- 前記段階(a)において、前記カーボンナノチューブの超音波分散を5分間行い、酸処理を2時間行う、請求項1に記載の銀がコーティングされたカーボンナノチューブを含有する電気接点材料の製造方法。
- 前記段階(e)において、前記グリオキシル酸水溶液と前記水酸化ナトリウム水溶液を混合する際に、90℃で1時間反応させる、請求項1に記載の銀がコーティングされたカーボンナノチューブを含有する電気接点材料の製造方法。
- 前記段階(h)は、放電プラズマ焼結法により行う、請求項4に記載の銀がコーティングされたカーボンナノチューブを含有する電気接点材料の製造方法。
- (a)カーボンナノチューブに超音波分散及び酸処理を行い、その後前記カーボンナノチューブの表面にスズとパラジウムを結合させる段階と、
(b)硝酸銀水溶液とアンモニア水溶液を混合し、その後前記段階(a)で製造されたカーボンナノチューブを混合する段階と、
(c)前記段階(b)で製造された混合溶液にグリオキシル酸水溶液と水酸化ナトリウム水溶液を混合して銀がコーティングされたカーボンナノチューブを製造し、その後金属が混合された合金を混合して粉末混合体を製造する段階と、を含むことを特徴とする銀がコーティングされたカーボンナノチューブを含有する電気接点材料の製造方法。 - 前記段階(c)において、前記カーボンナノチューブと混合される合金を構成する金属は、伝導度が14.3MS/m以上である、請求項11に記載の銀がコーティングされたカーボンナノチューブを含有する電気接点材料の製造方法。
- 前記合金は、銅、ニッケル及び金からなる群から選択される1種以上の金属が混合されたものである、請求項11又は12に記載の銀がコーティングされたカーボンナノチューブを含有する電気接点材料の製造方法。
- (d)前記粉末混合体を超音波分散し、真空乾燥する段階と、
(e)前記真空乾燥した粉末混合体を焼結する段階と、をさらに含む、請求項11に記載の銀がコーティングされたカーボンナノチューブを含有する電気接点材料の製造方法。
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