JP2022044560A - Nd-Fe-B系永久磁性体表面へのセラミック前駆体溶液吹き付け装置、及びNd-Fe-B系永久磁性体表面へのセラミック層形成方法。 - Google Patents
Nd-Fe-B系永久磁性体表面へのセラミック前駆体溶液吹き付け装置、及びNd-Fe-B系永久磁性体表面へのセラミック層形成方法。 Download PDFInfo
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Abstract
Description
溶液収容タンク、ポンプ、スプレー装置及び磁性体挟持装置を含み、
前記ポンプは第一管路及び第二管路を介して前記溶液収容タンク及び前記スプレー装置にそれぞれ連結され、
前記スプレー装置は前記磁性体挟持装置の上方に位置し、前記スプレー装置と前記磁性体挟持装置との間には空隙が存在し、
前記磁性体挟持装置は第三管路を介して溶液回収タンクに連結され、前記溶液回収タンクは第五管路を介して前記溶液収容タンクに連結され、
前記スプレー装置は、溶液噴射ノズルを含み、前記第二管路によって前記ポンプに連結され、
前記磁性体挟持装置は、支持板、上回収溝板及び下回収溝板を含み、前記下回収溝板は前記支持板の上方に位置し、前記下回収溝板の両端には前記上回収溝板が対称に設置され、前記上回収溝板と前記下回収溝板との間に前記Nd-Fe-B系永久磁性体を収容する収容空間が形成される、ことを特徴とする。
(ステップa)重量含有量でポリシラザン又は変性ポリシラザン0~50%、セラミックフィラー0~10%、有機溶剤40~96%、接着剤0~10%を多段階で撹拌・混合して均一なスラリー状のセラミック前駆体溶液を作成し、
(ステップb)Nd-Fe-B系永久磁性体を収容空間内に設置して挟持固定し、
(ステップc)前記セラミック前駆体溶液を、ポンプによってスプレー装置へ送り、前記スプレー装置によって前記Nd-Fe-B系永久磁性体の表面に前記セラミック前駆体溶液を噴射し、
(ステップd)噴射が完了した後、表面に前記セラミック前駆体溶液がコーティングされた前記Nd-Fe-B系永久磁性体を熱処理し、前記セラミック前駆体溶液を乾燥硬化させてセラミック層を形成する、ことを特徴とする。
表面を脱脂処理後のNd-Fe-B系永久磁性体8を用意し、セラミック前駆体溶液吹き付け装置にセットした。
表面を脱脂処理後のNd-Fe-B系永久磁性体8を用意し、セラミック前駆体溶液吹き付け装置にセットした。
表面を脱脂処理後のNd-Fe-B系永久磁性体8を用意し、セラミック前駆体溶液吹き付け装置にセットした。
表面を脱脂処理後のNd-Fe-B系永久磁性体8を用意し、セラミック前駆体溶液吹き付け装置にセットした。
2 ポンプ
3―1 第一管路
3-2 第二管路
4 溶液回収カバー
5 スプレー装置
5-1 溶液噴射ノズル
6 第三管路
7 溶液回収タンク
8 Nd-Fe-B系永久磁性体
9 上回収溝板
10 下回収溝板
11 支持板
12 第四管路
13 第五管路
Claims (14)
- Nd-Fe-B系永久磁性体の表面にセラミック前駆体溶液を吹き付けるための装置であって、
溶液収容タンク、ポンプ、スプレー装置及び磁性体挟持装置を含み、
前記ポンプは第一管路及び第二管路を介して前記溶液収容タンク及び前記スプレー装置にそれぞれ連結され、
前記スプレー装置は前記磁性体挟持装置の上方に位置し、前記スプレー装置と前記磁性体挟持装置との間には空隙が存在し、
前記磁性体挟持装置は第三管路を介して溶液回収タンクに連結され、前記溶液回収タンクは第五管路を介して前記溶液収容タンクに連結され、
前記スプレー装置は溶液噴射ノズルを含み、前記第二管路によって前記ポンプに連結され、
前記磁性体挟持装置は、支持板、上回収溝板及び下回収溝板を含み、前記下回収溝板は前記支持板の上方に位置し、前記下回収溝板の両端には前記上回収溝板が対称に設置され、前記上回収溝板と前記下回収溝板との間に前記Nd-Fe-B系永久磁性体を収容する収容空間が形成される、
ことを特徴とするNd-Fe-B系永久磁性体表面へのセラミック前駆体溶液吹き付け装置。 - 前記溶液噴射ノズルは複数の噴射孔を有し、複数の前記噴射孔はマトリクス型に配置される、
ことを特徴とする請求項1に記載のNd-Fe-B系永久磁性体表面へのセラミック前駆体溶液吹き付け装置。 - 前記スプレー装置は、前記溶液噴射ノズルの面を除く外方周囲が溶液回収カバーで覆われ、前記溶液回収カバーの上部は前記第二管路を貫通して前記スプレー装置の上方側に固定され、前記溶液回収カバーの下端は前記スプレー装置の下端に固定され、前記溶液回収カバーは第四管路を介して前記溶液回収タンクに連結される、
ことを特徴とする請求項1又は2に記載のNd-Fe-B系永久磁性体表面へのセラミック前駆体溶液吹き付け装置。 - Nd-Fe-B系永久磁性体の表面にセラミック層を形成する方法であって、
(ステップa)重量含有量でポリシラザン又は変性ポリシラザン0~50%、セラミックフィラー0~10%、有機溶剤40~96%、接着剤0~10%を多段階で撹拌・混合して均一なスラリー状のセラミック前駆体溶液を作成し、
(ステップb)Nd-Fe-B系永久磁性体を収容空間内に設置して挟持固定し、
(ステップc)前記セラミック前駆体溶液を、ポンプによってスプレー装置へ送り、前記スプレー装置によって前記Nd-Fe-B系永久磁性体の表面に前記セラミック前駆体溶液を噴射し、
(ステップd)噴射が完了した後、表面に前記セラミック前駆体溶液がコーティングされた前記Nd-Fe-B系永久磁性体を熱処理し、前記セラミック前駆体溶液を乾燥硬化させてセラミック層を形成する、
ことを特徴とするNd-Fe-B系永久磁性体表面へのセラミック層形成方法。 - 前記スプレー装置の噴射ノズルと前記Nd-Fe-B系永久磁性体との距離は5~50mmである、
ことを特徴とする請求項4に記載のNd-Fe-B系永久磁性体表面へのセラミック層形成方法。 - 前記(ステップb)及び前記(ステップc)の各工程は、請求項1ないし3のいずれか1項に記載のNd-Fe-B系永久磁性体表面へのセラミック前駆体溶液吹き付け装置を用いる、
ことを特徴とする請求項4又は5に記載のNd-Fe-B系永久磁性体表面へのセラミック層形成方法。 - 前記Nd-Fe-B系永久磁性体は、前記セラミック前駆体溶液を吹き付ける前に、純水、3重量%~5重量%の硝酸溶液、純水の順で洗浄し、超音波で除灰し、99重量%のアルコールを投入して脱水し、ブロー乾燥後に、50~60℃のオーブンを併用して20分間乾燥させた脱脂処理したものである、
ことを特徴とする請求項4ないし6のいずれか1項に記載のNd-Fe-B系永久磁性体表面へのセラミック層形成方法。 - 前記Nd-Fe-B系永久磁性体は、正方形、長方形、及びこれら以外の異形の磁性体を含む、
ことを特徴とする請求項4ないし7のいずれか1項に記載のNd-Fe-B系永久磁性体表面へのセラミック層形成方法。 - 前記セラミックフィラーは、低融点ガラス粉、酸化ケイ素、酸化アルミニウム、酸化チタン、酸化マグネシウム、酸化亜鉛、酸化鉄、酸化ジルコニウム、酸化タングステン、炭化ジルコニウム、炭化タングステン、炭化ホウ素、炭化ケイ素、炭化チタン、窒化ケイ素、ホウ化ジルコニウム、ホウ化チタン、希土類酸化物の一つ又は複数を含む、
ことを特徴とすることを特徴とする請求項4ないし8のいずれか1項に記載のNd-Fe-B系永久磁性体表面へのセラミック層形成方法。 - 前記有機溶剤は、エステル溶剤、エーテル溶剤、脂環式炭化水素溶剤及び脂肪族炭化水素溶剤のいずれかである、
ことを特徴とする請求項4ないし9のいずれか1項に記載のNd-Fe-B系永久磁性体表面へのセラミック層形成方法。 - 前記接着剤は、エポキシ樹脂、アクリル酸、有機シリコン、ポリウレタン、アクリル酸及び硬化接着剤の一つ又は複数を混合してなる、
ことを特徴とする請求項4ないし10のいずれか1項に記載のNd-Fe-B系永久磁性体表面へのセラミック層形成方法。 - 前記セラミック前駆体溶液を乾燥させる温度は50~400℃、処理時間は0.1~1時間であり、セラミック化させる温度は400~750℃、処理時間は0.5~4時間である、
ことを特徴とする請求項4ないし11のいずれか1項に記載のNd-Fe-B系永久磁性体表面へのセラミック層形成方法。 - 前記セラミック層の厚さは、5~35μmである、
ことを特徴とする請求項4ないし12のいずれか1項に記載のNd-Fe-B系永久磁性体表面へのセラミック層形成方法。 - 前記(ステップa)~(ステップd)の工程は、前記Nd-Fe-B系永久磁性体のコーティングが必要な各面に順次実施される、
ことを特徴とする請求項4ないし13のいずれか1項に記載のNd-Fe-B系永久磁性体表面へのセラミック層形成方法。
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