800C ⣭㧗 ₯⇕⵳⇕ࢩࢫࢸ࣒ࡢ㛤Ⓨ໭ᾏ㐨኱Ꮫ኱Ꮫ㝔ᕤᏛ◊✲㝔㝃ᒓ࢚ࢿࣝࢠ࣮࣭࣐ࢸࣜ࢔ࣝ⼥ྜ㡿ᇦ◊✲ࢭࣥࢱ࣮෸ᩍᤵ ⬟ᮧ㈗ᏹ
1㸬⥴ゝ ⏘ᴗ᤼⇕ࠊኴ㝧⇕➼ࡢᮍ฼⏝⇕ࡢ᭷ຠ฼⏝ࡢࡓࡵࠊ㧗ᗘ࡞⵳⇕ᢏ⾡ࡢ☜❧ࡀษᮃࡉࢀ࡚࠸ࡿࠋ⏘ᴗ㒊㛛࡛ࡣ⥲୍ḟ࢚ࢿࣝࢠ࣮ࡢ 15%࡟ࡶཬࡪ᤼⇕ࡀⓎ⏕ࡋ࡚࠾ࡾࠊࡑࡢ᭷ຠ฼⏝࡟ࡼࡿ໬▼⇞ᩱᾘ㈝๐ῶࡀᮇᚅࡉࢀࡿࠋ୍᪉ࠊḢ⡿ㅖᅜࢆ୰ᚰ࡟㞟ගኴ㝧⇕Ⓨ㟁㸦Concentrating Solar Power: CSP㸧ᢏ⾡ࡢ㛤Ⓨࡀ㐍ᒎࡋ࡚࠾ࡾࠊᅜ㝿࢚ࢿࣝࢠ࣮ᶵ㛵ࡢヨ⟬࡟ࡼࡿ࡜ CSP ࡢⓎ㟁ᐜ㔞ࡣ 2050 ᖺ࡟ࡣ 1000 GW ࡟㐩ࡋࠊ୺せ࡞㟁ຊ※࡜ࡋ࡚ά⏝ࡉࢀࡿࡇ࡜ࡀண ࡉࢀ࡚࠸ࡿ(1)ࠋ⏘ᴗ᤼⇕ࡣࣉࣟࢭࢫࡢ᧯ᴗࠊኴ㝧⇕ࡣ᫨ኪࡲࡓࡣኳೃ࡟ᕥྑࡉࢀࡿ㛫Ḟ⇕※࡛࠶ࡿⅬ࡛ྠࡌ≉ᚩࠊ฼⏝ୖࡢᅔ㞴ࡉࢆᢪ࠼࡚࠸ࡿࠋࡇࢀࡽࡢᮍ฼⏝⇕※ࢆ᭷ຠ࡟฼⏝ࡍࡿ࡟ࡣࠊ㛫Ḟⓗ࡟Ⓨ⏕ࡍࡿ⇕ࢆᅇ཰ࠊ୍᫬ⓗ࡟㈓ⶶࡍࡿ⵳⇕ᢏ⾡ࡢᑟධࡀ୙ྍḞ࡛࠶ࡿࠋ ₯⇕⵳⇕ࡣ≀㉁ࡢ┦ኚែ₯⇕ࢆ฼⏝ࡍࡿ⵳⇕ἲ࡛࠶ࡿࠋ₯⇕⵳⇕࡟౑ࢃࢀࡿ⵳⇕ᮦࡢࡇ࡜ࢆ₯⇕⵳⇕ᮦ࠶ࡿ࠸ࡣ┦ኚ໬≀㉁㸦Phase Change Material: PCM㸧࡜࿧ࡪࠋ₯⇕⵳⇕ᢏ⾡ࡣ PCM ࡢ୺࡟ᅛᾮ┦ኚ໬₯⇕ࢆ฼⏝ࡍࡿࡓࡵࠊ㢧⇕⵳⇕࡜ẚ࡭࡚㧗ᐦᗘ࡟⵳⇕ྍ⬟࡛࠶ࡿࠋࡲࡓࠊ㈓ⶶࡉࢀࡓ⇕ࡣ PCM ࡢ┦ኚែ ᗘ୍ᐃࡢᜏ ⇕※࡜࡞ࡾ࠺ࡿࠋࡍ࡞ࢃࡕࠊ⇕㟂せࣉࣟࢭࢫ࡬୍ᐃ ᗘ࡛ࡢ⇕౪⤥ࡀྍ⬟࡛࠶ࡿࠋຍ࠼࡚ࠊᇶᮏⓗ࡟ࡣ໬Ꮫ཯ᛂࢆకࢃࡎ≀㉁ࡢ┦ኚែࢆ⧞ࡾ㏉ࡍࡢࡳ࡞ࡢ࡛ࠊ໬Ꮫ⵳⇕࡟ẚ࡭⪏ஂᛶࡢⅬ࡛ඃ఩ᛶࡀ࠶ࡿ(2)ࠋ
 ୰㧗 ⏝₯⇕⵳⇕ᢏ⾡࡛ࡣ PCM ࡜ࡋ࡚୺࡟⁐⼥ሷࡀ᳨ウࡉࢀ࡚࠸ࡿࡀࠊ⁐⼥ሷࡣ⇕ఏᑟ⋡ࡀపࡃప⇕ᛂ⟅ᛶࡀၥ㢟࡛࠶ࡿࠋࡲࡓࠊ⁐⼥ሷࡣᅛᾮ┦ኚ໬᫬ࡢయ✚⭾ᙇ⋡ࡀ㧗ࡃࠊఏ⇕⟶ᦆയࡢせᅉ࡜࡞ࡿࠋࡉࡽ࡟ࠊ⁐⼥ሷ PCM ࡣ 300C ⛬ᗘࡢ⇕※ࡀᑐ㇟࡛࠶ࡾࠊ800C⣭ࡢ㧗࢚ࢡࢭࣝࢠ࣮ࢆᣢࡘ㧗 ᮍ฼⏝⇕※࡟ࡣᮍᑐᛂ࡛࠶ࡿࠋ༶ࡕࠊ⇕ᛂ⟅ᛶࡀ㧗ࡃ㸪㧗⵳⇕ᐦᗘ࠿ࡘ㧗 ᤼⇕฼⏝࡬ࡢ㐺⏝ࡀྍ⬟࡞₯⇕⵳⇕ᢏ⾡ࡢ㛤Ⓨࡀษᮃࡉࢀ࡚࠸ࡿࠋ ᡃࠎࡣ㧗 㡿ᇦ࡛ࡢ⵳⇕ࡀྍ⬟࡞ PCM ࡜ࡋ࡚ࠊ㔠ᒓࠊྜ㔠ࡢ㐺⏝ࢆᥦ᱌ࡋ࡚࠸ࡿ(3)ࠋ
㔠ᒓ PCM ࡣ୍⯡ⓗ࡞㧗

PCM ࡛࠶ࡿ⁐⼥ሷ࡟ẚ࡭࡚⇕ఏᑟ⋡ࡀ㧗ࡃࠊ⤌ᡂḟ➨࡛ࡣ⼥ゎ᫬ࡢయ✚⭾ᙇࢆపࡃไᚚ࡛ࡁࡿࠋ≉࡟ Cu ࠾ࡼࡧ Cu ⣔ྜ㔠ࡣ 800ºC ௨ୖࡢ⼥Ⅼ㸦㸻సື ᗘ㸧ࡀᮇᚅ࡛ࡁࡿࡓࡵࠊ㉸㧗

PCM ࡜ࡋ࡚᭷ᮃ࡛࠶ࡿࠋ PCM ࡣ⵳⇕᫬ᾮయ࡜࡞ࡿࡓࡵࠊ₃ฟ㜵Ṇ⏝ࡢ࢝ࣉࢭࣝ໬ᢏ⾡ࡀᚲせ࡜࡞ࡿࠋPCM ࡜ࡋ࡚ࡢ Cu ࡢ࢝ࣉࢭࣝ໬ࢆ⪃࠼ࡓ᫬ࠊ⁐⼥ Cu ࡣᴟࡵ࡚⭉㣗ᛶࡀ㧗࠸ࡓࡵࠊ⪏⭉㣗ᛶࡢ㧗࠸ࢭ࣑ࣛࢵࢡࢫ࡟ࡼࡿ࢝ࣉࢭࣝ໬ࡀ᭷ᮃ࡜࡞ࡿࠋࡲࡓࠊ⏘ᴗ᤼⇕ᅇ཰ࡸኴ㝧⇕฼⏝ࡢࡓࡵࡢ኱つᶍ࡞₯⇕⵳⇕ࢩࢫࢸ࣒ࢆ⪃࠼ࡿ࡜ࠊPCM ࢝ࣉࢭࣝ඘ሸᒙᆺ⇕஺᥮ჾࡀ᭷ᮃ࡛࠶ࡿࠋ
඘ሸᒙᆺ⇕஺᥮ჾ࡟ࡣ mm~cm ࣮࢜ࢲ࣮ࡢ PCM ࣐ࢡࣟ࢝ࣉࢭࣝࡢ㛤Ⓨࡀᚲせ࡜࡞ࡿࠋࡑࡇ࡛ᮏ◊✲࡛ࡣࠊ෇⟄ᆺࢭ࣑ࣛࢵࢡࢫࢩ࢙ࣝࢆ⏝࠸ࡓ Cu-PCM ࣐ࢡࣟ࢝ࣉࢭࣝ໬ᢏ⾡ࢆ㸫㸫ᥦ᱌ࡋࠊࡑࡢ⧞ࡾ㏉ࡋ≉ᛶࠊ⵳⇕ᛶ⬟ࢆㄪᰝࡋࡓࠋ2㸬ᐇ㦂᪉ἲ
2. 1 ᮦᩱ ᮏ◊✲࡛ࡣ Cu㸦⣧ᗘ 99.99%㸧ࢆ PCM ࡜ࡋ࡚౑⏝ࡋࡓࠋࡇࡢ PCM ࢆ඘ሸࡍࡿ࢝ࣉࢭ
ࣝ࡜ࡋ࡚ Al2O3 〇ࡢ෇⟄ᆺᐜჾࢆ౑⏝ࡋࡓࠋFig. 1 ࡣ෇⟄ᆺ Al2O3 ࢝ࣉࢭࣝࡢᴫせࢆ♧ࡍࠋ࢝ࣉࢭࣝࡣ࢝ࢵࣉ㒊࡜࢟ࣕࢵࣉ㒊࡛ᵓᡂࡉࢀࡿࠋ࢝ࢵࣉ࡜࢟ࣕࢵࣉࡢෆᚄࡣࡑࢀࡒࢀ
22.20 mm ࡜ 26.88 mm ࡛እᚄࡣࡑࢀࡒࢀ 26.48 mm ࡜ 31.06 mm ࡛࠶ࡿࠋࡇࡢ࢝ࢵࣉ࡜࢟ࣕࢵࣉࢆ⤌ࡳྜࢃࡏࡿ࡜ࠊ200 μm ⛬ᗘࡢᔐྜࡀᙧᡂࡉࢀࡿࠋࡲࡓࠊ࢝ࢵࣉ࡜࢟ࣕࢵࣉ
ࡢෆഃࡢ㧗ࡉࡣࡑࢀࡒࢀ 17.99 mm ࡜ 13.04 mm ࡛ࠊእഃࡢ㧗ࡉࡣࡑࢀࡒࢀ 19.90 mm ࡜15.08 mm ࡛࠶ࡿࠋ࢝ࢵࣉ࡜࢟ࣕࢵࣉࡢ⠓ྜ㒊ࢆᇙࡵࠊ᥋╔ࡍࡿࡓࡵࡢ᥋╔๣࡜ࡋ࡚ Al2O3ࡀ୺ᡂศ࡛࠶ࡿ࢔ࣟࣥࢭ࣑ࣛࢵࢡࢫ®ࢆ౑⏝ࡋࡓࠋ࢔ࣟࣥࢭ࣑ࣛࢵࢡࢫࡣ᭱㧗 1300C ࡲ࡛ࡢ⪏⇕ᛶࡀ࠶ࡿࠋ

CapCup

15.08

19.90

17.99

13.04CapPCM(Cu)22.2026.48a) Cup
CapInorganic adhesivefor sealing
Cup

26.88

31.06b) CapCupc) Capsule(Cap + Cup)

Fig.1 Schematic of a) Cup, b) Cap, and c) Capsule composed of a cup and cap
containing metallic PCM, together with their pictures (Unit: mm)

㸫㸫

2. 2 PCM ࢝ࣉࢭࣝ໬ࡢᡭ㡰 ࢝ࣉࢭࣝ໬ࢆ᳨ウࡍࡿࡓࡵࡢヨᩱ࡜ࡋ࡚ 6.27 cm3 ࡢ PCM ࢆ౑⏝ࡋࡓࠋࡇࡢ PCM ࡢయ✚ࡣᮏ◊✲࡟࠾ࡅࡿ౑⏝᭱㧗 ᗘ࡛࠶ࡿ 1200C ࡟࠾࠸࡚ࠊPCM ࡢయ✚ࡀ࢝ࣉࢭࣝෆ㒊ࡢᐜ✚௨ୗ࡜࡞ࡿࡇ࡜ࢆ๓ᥦ࡟タᐃࡋࡓࠋPCM ࢆ࢝ࣉࢭࣝ໬ࡍࡿࡓࡵࠊࡲࡎ Fig. 1 c)ࡢࡼ࠺࡟࢟ࣕࢵࣉࠊ࢝ࢵࣉࠊPCM ࠾ࡼࡧ᥋╔ᮦࢆ㓄⨨ࡋࡓࠋḟ࡟↓ᶵ⣔᥋╔ᮦࢆ◳໬ࡉࡏࡿࡓࡵࠊᐊ ࡛ 16 h ஝⇱ࡋࠊḟ࡟ 90Cࠊ150C ࡛ 1 h ⇕ฎ⌮ࡋ࡚ PCM ࢝ࣉࢭࣝࢆᚓࡓࠋ᭱ᚋ࡟ࡇࡢ PCM ࢝ࣉࢭࣝࢆ Ar 㞺ᅖẼୗ࡛ PCM ⼥Ⅼ௨ୖ࡟ PCM ࢝ࣉࢭࣝࢆຍ⇕ࡋࠊ࢝ࣉࢭࣝෆ㒊ࡢ PCM ࢆ⼥ゎࡉࡏࡓࠋ
2. 3 ⇕⪏ஂᛶヨ㦂 సᡂࡋࡓ PCM ࢝ࣉࢭࣝࡢ⇕⪏ஂᛶヨ㦂ࢆᐇ᪋ࡋࡓࠋࡇࡢヨ㦂࡛ࡣࠊసᡂࡋࡓ PCM ࢝ࣉࢭࣝࢆ Al2O3 〇ࡿࡘࡰ࡟ධࢀࠊ㟁Ẽ⅔ෆ࡟タ⨨ࡋࠊ1200C ࡛ 100 hࠊ✵Ẽ㞺ᅖẼࡲࡓࡣN2 㞺ᅖẼ࡟࡚ᜏ ಖᣢࡋࡓࠋPCM ࢝ࣉࢭࣝࡢ㧗 ⪏ஂᛶࢆホ౯ࡍࡿࡓࡵࠊಖᣢᚋࡢヨᩱࡢእほࠊ᩿㠃ࢆほᐹࡋࡓࠋࡲࡓࠊX ⥺ᅇᢡ⿦⨨㸦XRD, Cu Ka㸧ࠊ࢚ࢿࣝࢠ࣮ศᩓᆺ X ⥺ศගჾ㸦EDS㸧࡟࡚ヨ㦂ᚋࡢྛ㒊఩ࡢ⏕ᡂ≀ࢆྠᐃࡋࡓࠋ2. 4 ⧞ࡾ㏉ࡋ⪏ஂᛶヨ㦂 100 ᅇࡢ⼥ゎࠊจᅛࢧ࢖ࢡࣝࢆ⧞ࡾ㏉ࡍࡇ࡜࡛ࠊసᡂࡋࡓ PCM ࢝ࣉࢭࣝࡢ⧞ࡾ㏉ࡋ⪏ஂᛶࢆホ౯ࡋࡓࠋࡇࡇ࡛ࡣ✵Ẽᅽ࡟࡚ᕥྑ࡟⛣ືྍ⬟࡞஧ྎࡢ㟁Ẽ⅔㸦ᨺ⇕⏝ࠊ⵳⇕⏝࡟ࡑࢀࡒࢀ⊂❧ࡋ࡚ ᗘࢆタᐃྍ⬟㸧࡜▼ⱥ⟶࡛ᵓᡂࡉࢀࡿ⟶≧⛣ື⅔ࢆ⏝࠸࡚⧞ࡾ㏉ࡋ⵳ᨺ⇕ヨ㦂ࢆᐇ᪋ࡋࡓࠋヨᩱ࡛࠶ࡿ PCM ࢝ࣉࢭࣝࡣ▼ⱥ⟶ෆࡢ୰ኸ࡟タ⨨ࡉࢀࠊ⧞ࡾ㏉ࡋ
ヨ㦂୰ࡣᨺ⇕⏝ࠊ⵳⇕⏝ࡢ㟁Ẽ⅔ࡀタᐃࡋࡓ᫬㛫࡛஺஫࡟ධࢀ᭰ࢃࡿࡼ࠺タᐃࡋࡓࠋ⵳⇕⏝ࡢ㟁Ẽ⅔ࢆ 1100Cࠊ⵳⇕᫬㛫ࢆ 45 minࠊࡲࡓࠊᨺ⇕⏝ࡢ㟁Ẽ⅔ࡣ 1030Cࠊᨺ⇕᫬㛫ࢆ45 min ࡟タᐃࡋࠊ✵Ẽ୰ࡲࡓࡣ N2 㞺ᅖẼୗ࡛⧞ࡾ㏉ࡋヨ㦂ࢆᐇ᪋ࡋࡓࠋ⧞ࡾ㏉ࡋ⪏ஂᛶヨ㦂ᚋࡢヨᩱࡢᴫほࠊ࠾ࡼࡧ᩿㠃ࢆほᐹࡍࡿࡇ࡜࡛ PCM ࢝ࣉࢭࣝࡢ⪏ஂᛶࢆホ౯ࡋࡓࠋࡲࡓࠊ⧞ࡾ㏉ࡋ๓ᚋࡢ PCM ࡢ⼥Ⅼࠊจᅛ ᗘࠊ࠾ࡼࡧ₯⇕ࢆ DSC ࡟࡚ ᐃࡋࡓࠋ3㸬⤖ᯝ࡜⪃ᐹ
3. 1 ࢝ࣉࢭࣝ໬ฎ⌮ Fig. 2 ࡣ᥋╔㒊ࡢ◳໬ฎ⌮ᚋࡢ PCM ࢝ࣉࢭࣝࡢእほ࠾ࡼࡧ PCM ⁐⼥ฎ⌮ᚋࡢ PCM ࢝ࣉࢭࣝࡢᴫほ࡜᩿㠃෗┿࡛࠶ࡿࠋFig. 2 a) ࡟♧ࡍ㏻ࡾࠊ࢟ࣕࢵࣉ࡜࢝ࢵࣉࡢ຺ྜ㒊ࡣ⇕◳໬ࡋࡓ↓ᶵ⣔᥋╔๣࡟࡚᏶඲࡟᥋╔ࡉࢀ࡚࠸ࡓࠋ
Fig. 2 b) ࠾ࡼࡧ c) ࡣ⁐⼥ฎ⌮ᚋࡢPCM࢝ࣉࢭࣝࡢᴫほ࡜᩿㠃ᅗ࡛࠶ࡿࠋPCM ࡢ⼥Ⅼ௨ୖ࡟ຍ⇕ࡋࡓ࡟ࡶ㛵ࢃࡽࡎ࢝ࣉࢭࣝࡢ◚ᦆࡸ PCM ࡢ₃ࢀࡣ࡞࠿ࡗࡓࠋ ≉࡟ࠊ᩿㠃ᅗ࡟╔┠ࡍࡿ࡜ PCM ࡣ㔠ᒓගἑࢆ⥔ᣢࡋ࡚࠾ࡾࠊ⇕ฎ⌮୰࡟࡯࡜ࢇ࡝㓟໬ࡉࢀ࡚࠸࡞࠿ࡗࡓࠋࡲࡓࠊ✵㝽ࡀ࢝ࣉࢭࣝෆഃ࡟ほᐹࡉࢀࡓࠋ
ࡇࡢ✵㝽ࡣᅛᾮ┦ኚ໬᫬ࡢయ✚⭾ᙇ᫬࡟࠿࠿ࡿᅽຊࢆ⦆࿴ࡍࡿస⏝ࢆᣢࡘ࡜⪃࠼ࡽࢀࡿࠋ㸫㸫Void
ARON Ceramic®
for sealing

ARON Ceramic®
for sealing

PCM (Cu)
10mmb) Overview

10mma) After hardening

10mmc) Cross-section

Fig. 2 Cu-PCM capsule a) after hardening of adhesive, b) overview and c)
3. 2 ⪏ஂᛶヨ㦂cross-section after heat-treatment above melting point of each PCMCrucible
PCMcapsule10mmb) Fraction of cruciblea) Schematic image of testCapVoidVoid

Ceramics
for sealingPCMCup10mm10mmc) Overviewd) Cross-section

Fig.3 Cu-PCM capsule after thermal endurance test held 100 h at 1200 C under air;a) Schematic image of test, b) fraction piece of crucible, c) overview and d)cross-section㸫㸫

3. 2 ኱Ẽ㞺ᅖẼୗ࡛ࡢ⪏ஂᛶヨ㦂 Fig. 3 ࡣ a) ⪏ஂᛶヨ㦂᫬ࡢእほᅗࠊb) 1200Cࠊ100h ✵Ẽ୰࡛ຍ⇕ࡋࡓᚋࡢࠊ౑⏝ࡋࡓࣝࢶ࣎ࡢ᩿∦ࠊc) 1200Cࠊ100h ✵Ẽ୰࡛ຍ⇕ࡋࡓᚋࡢ PCM ࢝ࣉࢭࣝࡢእほࠊ࠾ࡼࡧd) ࡑࡢ᩿㠃ᅗࢆ♧ࡍࠋb) ࡟♧ࡍ㏻ࡾࠊ⪏ஂᛶヨ㦂࡟౑⏝ࡋࡓࣝࢶ࣎ࡣ PCM ࡜ࡋ࡚౑⏝ࡋࡓ Cu ࡟┤᥋ゐࢀ࡚࠸࡞࠸࡟ࡶ㛵ࢃࡽࡎࠊኚⰍࠊ⭉㣗ࡋࡓࠋࡇࢀࡣ PCM ࡲࡓࡣ Cu ࢆྵࡴ㓟໬≀ࡀ⵨Ⓨࡋࠊࡿࡘࡰ࡟௜╔ࡋࡓࡶࡢ⪃࠼ࡽࢀࡿࠋAl2O3 〇ࡢ࢝ࢵࣉ࡜࢟ࣕࢵࣉࡣ
୧ഃ࡜ࡶ㒊ศⓗ࡟㯮ⰍࠊࡲࡓࡣⲔⰍ࡟ኚⰍࡋ࡚࠸ࡓࠋࡇࢀࡣࢩ࢙ࣝࡀ⭉㣗ࡋࡓࡇ࡜ࢆ♧ࡍドᣐ࡛࠶ࡿࠋࡲࡓࠊd) ࡟♧ࡍ㏻ࡾࠊ࠸ࡃࡘ࠿ࡢ࣎࢖ࢻࡀ PCM 㒊ࡢୖ㒊࠾ࡼࡧ୰ኸ㒊࡟ほᐹ࡛ࡁࡓࠋ࢟ࣕࢵࣉ࡜࢝ࢵࣉࡀ㔜࡞ࡗ࡚࠸ࡿ㒊ศࡣ≉࡟⭉㣗ࡀ⃭ࡋ࠿ࡗࡓࠋ࢝ࢵࣉෆഃୖ㒊ࡢ⭉㣗῝ᗘࡣẚ㍑ⓗᑠࡉࡃࠊAl2O3 ࡢࣂࣝࢡࡀኚ໬ࡏࡎṧࡗ࡚࠸ࡓࠋ⁐⼥ PCM ࡜┤᥋᥋ゐࡋ࡚࠸ࡿ࢝ࢵࣉෆഃࡢ㒊ศࡣ㉥Ⰽ࡟ኚⰍࡋ࡚࠸ࡓࠋ
 Fig. 4 ࡣ⪏ஂᛶヨ㦂ᚋࡢࢩ࢙ࣝࡢ XRD ࡢ⤖ᯝࢆ♧ࡍࠋ࢝ࢵࣉࡢእഃ⾲㠃࡟఩⨨ࡍࡿ
Area 1 ࡛ࡣࠊPCM ࡜ࡣ┤᥋᥋ゐࡋ࡚࠸࡞࠸㒊఩࡛࠶ࡿ࡟ࡶ㛵ࢃࡽࡎ CuAl2O4 ࡀ᳨ฟࡉࢀࡓࠋCu ࡢ⵨Ẽ࡜⁐⼥ Cu ࡟ 100 h ┤᥋ࡉࡽࡉࢀ࡚࠸ࡓ࢝ࢵࣉࡢෆഃ࡛࠶ࡿ Area2 ࡟ࡶྠᵝ࡟ CuAl2O4 ࡀ᳨ฟࡉࢀࡓࠋArea 3 ࡣ⁐⼥ Cu ࡜᥋ࡋ࡚࠸ࡓ࢝ࢵࣉࡢෆഃ࡛࠶ࡿࠋࡇࡇ࡛
ࡣ Cu2O ࡀ᳨ฟࡉࢀࠊCu2O ࡟ࡼࡾ㉥ⲔⰍ࡟ኚⰍࡋ࡚࠸ࡓࠋ
㯮Ⰽ࡟ኚⰍࡋࡓ⾲㠃ࢆᣢࡘ Area4 ࡣ࢝ࢵࣉࡢእഃ⾲㠃࡛࠶ࡿࠋࡇࡇ࡛ࡣ Al2O3 ࡀẕ┦࡛࠶ࡿ࡟ࡶ㛵ࢃࡽࡎ CuAl2O4 ࡜ CuOࡀ᳨ฟࡉࢀࡓࠋ
 Fig. 5 ࡣࠊ⇕⪏ஂヨ㦂ᚋࡢ PCM ࢝ࣉࢭࣝ࠿ࡽྲྀࡾฟࡋࡓ࢟ࣕࢵࣉࡢୖ㒊ࡢ SEM ほᐹ⤖ᯝࠊ࠾ࡼࡧ⥺ศᯒ⤖ᯝࢆ♧ࡍࠋAl2O3 ࢝ࣉࢭࣝ࠿ࡽࡣ Cu ࡀ୍ᐃ⃰ᗘ᳨࡛ฟࡉࢀࠊ≉࡟࢝ࣉࢭࣝෆഃ⾲㠃࡟ࡣ㧗⃰ᗘ᳨࡛ฟࡉࢀࡓࠋᮍฎ⌮ࡢ Al2O3 ࢝ࣉࢭࣝ࡟࠾ࡅࡿ Cu ࣆ࣮ࢡࡢࣂࢵࢡࢢࣛ࢘ࣥࢻࢆ⪃៖ࡋ࡚ࡶࠊ⪏⇕ᛶヨ㦂ᚋ࡟࢟ࣕࢵࣉ୰࡟ PCM ⏤᮶ࡢ Cu ࡀ᳨ฟࡉࢀࡓࡶࡢ࡜ゎ㔘࡛ࡁࡿࠋ
Area 1: Al2O3: CuAl2O4: Al2O3

Area 2

Area 1

Intensity[ a.u.]: CuAl2O4: Al2O3

Area 3: Cu2O

: CuAl2O4

Area 4: CuOArea 2
Area 3
Area 4

Al2O3: Al2O310mm
20304050607080

2theta[㼻]a) Cross-section of the capsule

2 theta[ ι]b) XRD results of Al2O3 container (Area 1- 4)

Fig.4 XRD results of the test pieces which is Fig. 3 c)㸫㸫

90

 Fig. 6 ࡣ࢝ࢵࣉ㒊ࡢୖ㒊ࡢ᩿∦ࡢ⪏⇕ヨ㦂๓ᚋࡢᐃ㔞ศᯒ⤖ᯝ࡛࠶ࡿࠋa㸧ࡣヨ㦂∦ࡢษࡾྲྀࡾ㒊఩ࢆࠊb) ࡣ⪏⇕ヨ㦂๓ࡢ᩿∦ࡢእほ࡜ SEM ཬࡧ EDS ࣐ࢵࣆࣥࢢ⤖ᯝࢆࠊc) ࡣ⪏⇕ヨ㦂㸦✵Ẽ୰ 1200C ࡛ 4 h ಖᣢ㸧ᚋࡢ᩿∦ࡢእほ࡜ SEM ཬࡧ EDS ࣐ࢵࣆࣥࢢ⤖ᯝࢆ♧ࡍࠋFig. 6 b, c) ࡟♧ࡍࡼ࠺࡟ࠊ࢝ࣉࢭࣝࡢ⾲㠃ᵓ㐀ࡣ኱ࡁࡃኚ໬ࡋࠊඖࡢ Al2O3 ⢏Ꮚࡢ࿘ᅖ࡟ᑠࡉ࡞⢏ᏊࡀᏑᅾࡋࡓࠋࡲࡓࠊヨ㦂๓ࡣⓑⰍࡔࡗࡓࡀࠊヨ㦂ᚋࡣⲔⰍ࡟ኚⰍࡋࡓࠋ
ࡲࡓ EDS ࡢᐃ㔞ศᯒࡼࡾࠊヨ㦂๓ࡢࢩ࢙ࣝ୰ࡢ Cu ⃰ᗘࡣ 0.6mass%⛬ᗘࡔࡗࡓࡢ࡟ᑐࡋࠊヨ㦂ᚋࡣ 15.7mass%࡟ቑຍࡋࡓࠋ௨ୖࡼࡾࠊ1200 Cࠊ100 h ࡢ⇕ฎ⌮࡟ࡼࡾࠊPCM ୰ࡢCu ࡣ Al2O3 ࢝ࣉࢭࣝࡢෆഃ࠿ࡽእഃ࡬࡜ᣑᩓࡋࡓࡇ࡜ࡀ᫂ࡽ࠿࡜࡞ࡗࡓࠋMeasurement
fieldSEM
Base line

10mm

500μm
Resin

Resin

CapsuleCopper
0.0

0.2

0.4

0.6

0.8

1.0

1.2

1.4

1.6

1.8

2.0

2.2

2.4mm

Fig.5 SEM-EDS line analyses of the specimens after thermal endurance tests held
100 h at 1200 C under air atmospherea) Cutout way of test piece
Cutout piece

Original plane

CapCutting
plane

Viewing surfaceb) Before oxidationc) After oxidation

SEMSEM

10mm

10mm5μm

Element Al
Mass%OCu

54.2 40.3 0.6

5μm

Mg Si

Element Al

1.6

Mass%

3.3

OCu

Mg Si

44.8 31.9 15.7 4.3 3.3

Fig.6 Quantitative analyses of the test piece of which was used in the thermal
endurance test at 1200 C for 100 h under air; a) before and b) after oxidation
treatment held 4 h at 1200 C under air by SEM-EDS mapping㸫㸫

3. 3 N2 㞺ᅖẼୗ࡛ࡢ⪏ஂᛶヨ㦂 Fig. 7 ࡣࠊN2 㞺ᅖẼୗ 1200C ࡟࡚ 100 h ಖᣢᚋࡢ Cu-PCM ࢝ࣉࢭࣝࡢ a) እほ࠾ࡼࡧb) ᩿㠃ᅗࢆ♧ࡍࠋ✵Ẽ୰࡟࡚㧗 ಖᣢࡋࡓ PCM ࢝ࣉࢭࣝ࡜ࡣእほࠊ᩿㠃ᅗ࡜ࡶ࡟ⴭࡋࡃ␗࡞ࡗࡓ㸦Fig. 3 ཧ↷㸧ࠋ࢝ࣉࢭࣝࡢ◚ቯࡸ⭉㣗ࡣ࡞ࡃࠊPCM ࡢ₃ࢀࡶほᐹࡉࢀࡎࠊPCM
࢝ࣉࢭࣝࡢእほࡣヨ㦂๓࡜ྠᵝࡢ≧ែ࡛࠶ࡗࡓࠋFig. 7 b) ࡢ᩿㠃ᅗࡼࡾ PCMࠊ↓ᶵ⣔᥋╔๣࡜ࡶ࡟ヨ㦂๓࡜ኚ໬ࡀ࡞࠸ࡇ࡜ࡀ☜ㄆ࡛ࡁࡓࠋ Fig. 8 ࡣ N2 㞺ᅖẼୗ࡟࠾ࡅࡿ 100cycles ࡢ⧞ࡾ㏉ࡋ⵳ᨺ⇕ヨ㦂ᚋࡢ PCM ࢝ࣉࢭࣝࡢ a)እほ࡜ b) ᩿㠃ᅗࢆ♧ࡍࠋ⧞ࡾ㏉ࡋヨ㦂ᚋࡶ࢝ࣉࢭࣝࡢእほ࡟ࡣ඲ࡃኚ໬ࡣ࡞࠿ࡗࡓࠋ௨ୖࡼࡾࠊCu ࢆ PCM ࡜ࡋ࡚฼⏝ࡋࡓ PCM ࢝ࣉࢭࣝࡣ୙άᛶ㞺ᅖẼୗ࡛ࡣ౑⏝ྍ⬟࡛࠶ࡿࡇ࡜ࡀ᫂ࡽ࠿࡜࡞ࡗࡓࠋ
3. 4 ⵳⇕ᛶ⬟ Fig. 9 ࡣ a) PCM㸦= Cu㸧࠾ࡼࡧ b) ⧞ࡾ㏉ࡋ 100cycles ᚋࡢ PCM ࡢ DSC

ᐃ⤖ᯝࢆ♧ࡍࠋ⧞ࡾ㏉ࡋ 100 cycles ᚋࡶ⧞ࡾ㏉ࡋ๓ࡢࢧࣥࣉࣝ࡜ྠᵝࡢ⼥ⅬࠊจᅛⅬ࠾ࡼࡧ₯⇕ࢆ⥔ᣢࡋࡓࠋ
CapPCM

Ceramics
for sealing

10mmCup10mm10mma) Overviewb) Cross-section

Fig. 7 Cu-PCM capsule after thermal endurance test held 100 h at 1200 Cunder N2CapCeramics
for sealing
CupVoidPCM10mm10mma) Overviewb) Cross-section

Fig. 8 Cu-PCM capsule after 100 times cyclic melting and freezing under N2㸫㸫a) Cub) Cu after 100 cycles
Tf.p.: 1052 C
Heat flow [a.u.]

Heat flow [a.u.]

Tf.p.: 1048 C

CoolingHeating

CoolingHeating

ΔH : 147.6 J g-1
Tm.p.: 1062 C

1000

1050

1100

Temperature [䰳]1000

ΔH : 128.5 J g-1
Tm.p.: 1065 C
1050

Temperature [䰳]1100Fig. 9 DSC curve of a) Cu and b) Cu after 100cycle obtained from 25 to 1110C
at a heating or cooling rate of 2C min-1 under Ar atmosphere4㸬⤖ゝ ᮏ◊✲࡛ࡣࠊ෇⟄ᆺ Al2O3 ࢩ࢙ࣝࢆ⏝࠸ࡓ Cu-PCM ࣐ࢡࣟ㸦mm~cm ࣮࢜ࢲ࣮㸧࢝ࣉࢭࣝ໬ᢏ⾡ࢆᥦ᱌ࡋࠊࡑࡢ⧞ࡾ㏉ࡋ≉ᛶࠊ⵳⇕ᛶ⬟ࢆㄪᰝࡋࡓࠋࡑࡢ⤖ᯝ௨ୗࡢ▱ぢࡀᚓࡽࢀࡓࠋ
(1) ᮏ◊✲࡛సᡂࡋࡓ PCM ࢝ࣉࢭࣝࡣ✵Ẽ㞺ᅖẼ㸦㓟⣲Ꮡᅾୗ㸧࡛ࡣ PCM ࡛࠶ࡿ Cu ࡟ࡼࡗ࡚ࢩ࢙࡛ࣝ࠶ࡿ Al2O3 ࡀⴭࡋࡃ⭉㣗ࡉࢀࠊ౑⏝୙ྍ⬟࡛࠶ࡗࡓࠋ
(2) ᮏ◊✲࡛సᡂࡋࡓ PCM ࢝ࣉࢭࣝࡣ୙άᛶ㞺ᅖẼ࡟࠾࠸࡚ࡣ㧗 ⪏ஂᛶࠊ⧞ࡾ㏉ࡋ⪏ஂᛶ࡜ࡶ࡟ඃࢀࡿࡓࡵࠊ฼⏝ྍ⬟࡛࠶ࡿࠋ(3) Cu ࡣ⧞ࡾ㏉ࡋ⵳ᨺ⇕ᚋࡶ⵳⇕ᛶ⬟ࡀຎ໬ࡏࡎࠊ㉸㧗 ᇦ࡛సືྍ⬟࡞ PCM ࡜ࡋ࡚ᮇᚅ࡛ࡁࡿࠋ
ㅰ㎡ ᮏ◊✲ࡣࠕබ┈㈈ᅋἲே JFE21 ୡ⣖㈈ᅋࠖࡢ◊✲ຓᡂ࡟ࡼࡾᐇ᪋ࡉࢀࡓࡶࡢ࡛࠶ࡾࡲࡍࠋࡇࡇ࡟グࡋ࡚ឤㅰࡢពࢆ⾲ࡋࡲࡍࠋཧ⪃ᩥ⊩(1) ྜྷ⏣୍㞝㸪࢚ࢿࣝࢠ࣮⥲ྜᕤᏛ㸪43-53 (2013).
(2) ⬟ᮧ㈗ᏹ㸪⛅ᒣ཭ᏹ㸪໬Ꮫᕤᴗ㸪38-47 (2013).
(3) ⬟ᮧ㈗ᏹ࣭௚ 4 ྡ㸪➨ 51 ᅇ᪥ᮏఏ⇕ࢩ࣏ࣥࢪ࣒࢘ㅮ₇ㄽᩥ㞟 (2014)㸫㸫