JP6482013B1 - 構造体およびその製造方法 - Google Patents
構造体およびその製造方法 Download PDFInfo
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Abstract
Description
本発明の第2の側面は、構造体に係り、前記構造体では、前記複数の粒子の各々の表面の全体が前記固定部材によって取り囲まれて、前記固定部材が複数の微結晶を含み、前記複数の微結晶の粒界に不活性ガスが存在する。
本発明の第3の側面は、構造体に係り、前記構造体では、前記複数の粒子の各々の表面の全体が前記固定部材によって取り囲まれて、前記固定部材は、下地と、前記下地の上に配置された膜とを含み、前記複数の粒子は、前記下地の表面に接触するように前記表面に沿って2次元状に配置された粒子を含み、前記2次元状に配置された粒子は、前記膜を介して相互に離隔して配置され、かつ、前記膜によって覆われている。
本発明の第4の側面は、構造体に係り、前記構造体では、前記複数の粒子の各々の表面の全体が前記固定部材によって取り囲まれて、前記構造体は、前記固定部材を覆うように配置された被覆膜を有する。
図1、図2には、本発明の第1実施形態の構造体1の模式的な断面図が示されている。ここで、図2は、図1のA−A’線に沿った断面の一部の拡大図に相当する。構造体1は、複数の粒子3が相互に離隔されるように固定部材10の中に配置された構造を有する。
粒子3としてCu粒子を形成し、膜4としてMgO膜を形成する実施例を説明する。本実施例では、凝集抑制効果を検証するにあたり、比較的凝集しやすい金属であり、かつ水素吸蔵合金の構成要素となりうるCuを粒子3の構成元素として選択した。
(第1工程)
第1工程では、チャンバー内の圧力を0.02Paに維持し、Cuターゲットに0.1kWの直流電力を供給し、スパッタガスとしてアルゴンガスを使用した。
(第2工程)
第2工程では、チャンバー内の圧力を0.05Paに維持し、MgOターゲットに1.1kWの高周波電力を供給し、スパッタガスとしてアルゴンガスを使用した。
(第3工程)
第3工程では、チャンバー内の圧力を0.02Paに維持し、Cuターゲットに0.1kWの直流電力を供給し、スパッタガスとしてアルゴンガスを使用した。
以下、図7を参照しながら本発明の第2実施形態を説明する。なお、第2実施形態として言及しない事項は、第1実施形態に従いうる。第2実施形態の構造体1において、不活性ガス7は、膜4(固定部材10)に存在している。例えば、膜4における不活性ガス7の含有率は、例えば0.5原子%以上である。膜4は、複数の微結晶を含みうる。不活性ガス7は、例えば、該複数の微結晶の粒界に存在する。膜4の粒界に不活性ガスを積極的に取り込むことによって、粒界を通じて空気中の水分が構造体1の内部に侵入し、粒子3を酸化して、水素吸蔵能力を低下させることを抑制することができる。
以下、図8を参照しながら本発明の第3実施形態を説明する。なお、第3実施形態として言及しない事項は、第1又は第2実施形態に従いうる。第3実施形態の構造体1は、膜4(固定部材10)を覆うように被覆膜8を有し、被覆膜8が不活性ガス7を含有する。被覆膜8における不活性ガス7の含有率は、例えば、0.5原子%以上である。この例では、被覆膜8における不活性ガス7の含有率は、膜4(固定部材10)における不活性ガス7の含有率よりも大きい。
Claims (18)
- 各々が水素吸蔵金属元素を含む複数の粒子が相互に離隔されるように固定部材の中に配置された構造体であって、前記複数の粒子の各々の表面の全体が前記固定部材によって取り囲まれ、前記固定部材が酸化物および窒化物の少なくとも1つを含む、
ことを特徴とする構造体。 - 各々が水素吸蔵金属元素を含む複数の粒子が相互に離隔されるように固定部材の中に配置された構造体であって、前記複数の粒子の各々の表面の全体が前記固定部材によって取り囲まれ、前記固定部材が複数の微結晶を含み、前記複数の微結晶の粒界に不活性ガスが存在する、
ことを特徴とする構造体。 - 前記固定部材における前記不活性ガスの含有率は、0.5原子%以上である、
ことを特徴とする請求項2に記載の構造体。 - 各々が水素吸蔵金属元素を含む複数の粒子が相互に離隔されるように固定部材の中に配置された構造体であって、前記複数の粒子の各々の表面の全体が前記固定部材によって取り囲まれ、前記固定部材は、下地と、前記下地の上に配置された膜とを含み、前記複数の粒子は、前記下地の表面に接触するように前記表面に沿って2次元状に配置された粒子を含み、前記2次元状に配置された粒子は、前記膜を介して相互に離隔して配置され、かつ、前記膜によって覆われている、
ことを特徴とする構造体。 - 前記膜は、複数の微結晶を含み、前記複数の粒子の各々は、前記膜の前記複数の微結晶の少なくとも1つに接している、
ことを特徴とする請求項4に記載の構造体。 - 各々が水素吸蔵金属元素を含む複数の粒子が相互に離隔されるように固定部材の中に配置された構造体であって、前記固定部材を覆うように配置された被覆膜を有し、前記複数の粒子の各々の表面の全体が前記固定部材によって取り囲まれている、
ことを特徴とする構造体。 - 前記被覆膜の不活性ガスの含有率は、前記固定部材における不活性ガスの含有率よりも高い、
ことを特徴とする請求項6に記載の構造体。 - 前記被覆膜の原子量または分子量は、前記固定部材の原子量または分子量よりも大きい
ことを特徴とする請求項6または7に記載の構造体。 - 前記被覆膜は、複数の微結晶を含み、前記被覆膜の前記複数の微結晶の粒界に不活性ガスが存在する、
ことを特徴とする請求項6乃至8のいずれか1項に記載の構造体。 - 前記被覆膜における前記不活性ガスの含有率は、0.5原子%以上である、
ことを特徴とする請求項9に記載の構造体。 - 前記複数の粒子の各々が1000nm以下の寸法を有する、
ことを特徴とする請求項1乃至10のいずれか1項に記載の構造体。 - 前記複数の粒子の各々が100nm以下の寸法を有する、
ことを特徴とする請求項11に記載の構造体。 - 前記固定部材は、融点が1400℃以上の材料で構成されている、
ことを特徴とする請求項1乃至12のいずれか1項に記載の構造体。 - 前記複数の粒子において、隣接する粒子の間の距離が、1nm以上かつ10nm以下である、
ことを特徴とする請求項1乃至13のいずれか1項に記載の構造体。 - 各々が水素吸蔵金属元素を含む複数の粒子を互いに離隔するように形成する第1工程と、
前記複数の粒子を覆うように膜を形成する第2工程と、
を含むことを特徴とする構造体の製造方法。 - 前記第1工程では、スパッタリング法によって前記複数の粒子を形成し、前記第2工程では、スパッタリング法によって前記膜を形成する、
ことを特徴とする請求項15に記載の構造体の製造方法。 - 前記第1工程および前記第2工程を含む処理を繰り返す、
ことを特徴とする請求項16に記載の構造体の製造方法。 - 前記第1工程では、スパッタリング法によって前記複数の粒子を形成し、前記第2工程では、スパッタリング法によって前記膜を形成し、
下地をスパッタリング装置に搬入した後、前記下地を前記スパッタリング装置から搬出することなく、前記下地に対して前記処理を繰り返す、
ことを特徴とする請求項17に記載の構造体の製造方法。
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| TWI690610B (zh) | 2020-04-11 |
| US20200001271A1 (en) | 2020-01-02 |
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