衛星用絶縁材料の真空中における 表面抵抗率࡮体積抵抗率測定

第４回「宇宙環境シンポジウム」講演論文集
ⴡᤊ↪⛘✼᧚ᢱߩ⌀ⓨਛߦ߅ߌࠆ
⴫㕙ᛶ᛫₸࡮૕Ⓧᛶ᛫₸᷹ቯ
ዊችጊਂⴕ
ၯ₹ᄢቇੳ↰Ꮏ⟤
,#:#ጊ⚊ᐽ
ၯ₹ᄢቇዊᨋା৻
ၯ₹ᄢቇ
Measurement of surface and volume resistivity of insulator materials for satellites in vacuum condition
Takeyuki Komiyama (Saitama University), Kumi Nitta (JAXA) ,
Yasushi Yamano (Saitama University), Shinichi Kobayashi (Saitama University)
This paper investigates surface and volume resistivity of insulator materials used for the artificial satellites. Measurements were
carried out under vacuum and atmospheric conditions respectively. The measured materials are two kinds of white paints which
are used for the antena portion of satellites, two kinds of glasseswhich are used for the cover glass of solar panel and a
polyimide film which are used for the thermal control material on the satellite. It was confirmed that the surface resistivity for
almost all of the insulator materials except for polyimide film under vacuum condition was higher than that under atmospheric
condition. Desorption of moisture vapor from the insulator surface is the main cause of the increase of the surface resistivity in
vacuum. On the other hand, their volume resistivity except for the white paints had no difference between vacuum and
atmospheric conditions. White paints under vacuum condition showed the higher volume resistivity than that of atmospheric
condition.
ࠠ࡯ࡢ࡯࠼㧦⌀ⓨ㧘⴫㕙ᛶ᛫₸㧘૕Ⓧᛶ᛫₸
Keywords㧦Vacuum, Surface resistivity, Volume resistivity
1.
3.
䈲䈛䉄䈮
ታ㛎ᣇᴺ䊶ⵝ⟎
ੱᎿⴡᤊߩࠕࡦ࠹࠽ㇱಽߦ૶ࠊࠇࠆᾲ೙ᓮ᧚ᢱ߿ᄥ㓁
⴫㕙ᛶ᛫࡮૕Ⓧᛶ᛫᷹ቯ⹜㛎ߪᄢ᳇࿶߆ࠄ 㧙2C ⒟ᐲ
㔚ᳰࡄࡀ࡞ߩࠞࡃ࡯ࠟ࡜ࠬߥߤቝቮᯏߩ⸳⸘ߦᔅⷐߥ⛘
ߩ⌀ⓨⅣႺਅߢ᷹ቯน⢻ߥᛶ᛫₸᷹ቯኈེࠍ↪޿ߡታ㛎
✼᧚ᢱߩㆬቯߦߪᯏ᪾⊛․ᕈᾲశቇ․ᕈߘߒߡ㔚᳇
ࠍⴕߞߚ‫ޕ‬
⊛․ᕈߥߤߩ‛ᕈ୯߇ᔅⷐߢ޽ࠆ‫ޕ‬
ᧄታ㛎ߢߪฦ⹜ᢱ䈮ኻ䈚䈩,ᛶ᛫₸᷹ቯ↪䈮㌁䊕䊷䉴䊃䉕
↪䈇䈩㔚ᭂ䉕૞⵾䈚䈢(1)‫ޕ‬ᛶ᛫₸᷹ቯ↪ߩ㔚ᭂ䈱᭎⇛࿑䉕
৻⥸⊛䈮⛘✼᧚ᢱ䈱⴫㕙ᛶ᛫₸䈲㪃䈠䈱๟࿐ⅣႺ䈮䉋䈦
䈩ᄢ䈐䈒ᄌേ䈚㪃․䈮⌀ⓨⅣႺਅ䈪䈲ᄢ᳇ਛ䈱୯䈫Ყ䈼䈩ᄢ
࿑ 1 䈮,ฦ㔚ᭂ䈱ኸᴺ䉕⴫䋳䈮␜䈜䇯
䈐䈒⇣䈭䉍㪃᧚ᢱ䈮䉋䉍䈠䈱ᄌേ᏷䉅⇣䈭䉎䈖䈫䈏੍ᗐ䈘䉏䉎䇯㩷
᷹ቯ࿁〝ߣߘࠇߙࠇߩᛶ᛫₸ߩ▚಴ᣇᴺߪ,ෳ⠨ᢥ₂(1)
ᧄ⎇ⓥ䈪䈲㪃䉝䊮䊁䊅ㇱ䈮૶↪䈘䉏䉎⊕⦡Ⴃᢱ䈍䉋䈶ᄥ㓁
ࠍ↪޿,ฦ⹜ᢱߦߟ޿ߡᄢ᳇ਛߣ⌀ⓨਛߢᛶ᛫₸ߩ᷹ቯࠍ
㔚ᳰ䊌䊈䊦䈱䉦䊋䊷䉧䊤䉴䉇䊘䊥䉟䊚䊄䊐䉞䊦䊛䈭䈬䈱⛘✼᧚
ⴕߞߚ‫ޕ‬
ᢱ䈱⴫㕙ᛶ᛫₸䊶૕Ⓧᛶ᛫₸䉕ᄢ᳇ਛ㪃⌀ⓨਛ䈪䈠䉏䈡䉏᷹
4.
ቯ䈚㪃䈠䈱ᄌൻ䉕⺞ᩏ䈚䈢䇯㩷
⚿ᨐ߅ࠃ߮⠨ኤ
⴫ ߦฦ⹜ᢱߩ⌀ⓨਛᄢ᳇ਛߩ⴫㕙ᛶ᛫₸ࠍ␜ߔ‫߶ޕ‬
2.
ߣࠎߤߩ⹜ᢱߩ⴫㕙ᛶ᛫₸ߪ਄᣹᏷ߪߐ߹ߑ߹ߢ޽ࠆ
᷹ቯ⹜ᢱ
߇ᄢ᳇ਛߦᲧߴߡ⌀ⓨਛߦ߅޿ߡᄢ߈ߊჇടߒߚ‫ࠇߎޕ‬
᷹ቯߦ૶↪ߒߚ⹜ᢱߪ,㧞⒳㘃ߩ⊕⦡Ⴃᢱ,㧞⒳㘃ߩ⍹
⧷ࠟ࡜ࠬ,߅ࠃ߮ࡐ࡝ࠗࡒ࠼ࡈࠖ࡞ࡓߢ,߹ߚ,Ყセߣߒߡ
ߪ⌀ⓨਛߢߪ⹜ᢱ⴫㕙ߦๆ⌕ߒߡ޿ࠆ᳓ಽ߇⣕㔌ߒߚߚ
⌀ⓨਛߩઍ⴫⊛ߥ⛘✼᧚ᢱߢ޽ࠆࠕ࡞ࡒ࠽࠮࡜ࡒ࠶ࠢࠬ
߼ߣ⠨߃ࠄࠇࠆ‫ߪࡓ࡞ࠖࡈ࠼ࡒࠗ࡝ࡐޕ‬ᄢ᳇ਛ,⌀ⓨਛߢ
߽↪ᗧߒߚ‫⦡⊕ޕ‬Ⴃᢱߩ․ᕈࠍ⴫㧝ߦ,⍹⧷ࠟ࡜ࠬ,ࡐ࡝ࠗ
⴫㕙ᛶ᛫₸ߪ߶߷ᄌࠊࠄߥ޿⚿ᨐߣߥߞߚ‫ޕ‬
ࡒ࠼ࡈࠖ࡞ࡓ,ࠕ࡞ࡒ࠽࠮࡜ࡒ࠶ࠢࠬߩ․ᕈࠍ⴫ 2 ߦ␜
R3
ߔ‫⦡⊕ޕ‬Ⴃᢱߪ㕖ዉ㔚ᕈߢ⵾ㅧࡔ࡯ࠞ࡯ߩ⇣ߥࠆήᯏ♽
R2
ߣࠪ࡝ࠦࡦ♽ߩ 2 ⒳㘃ߩ߽ߩߢ,⍹⧷ࠟ࡜߽ࠬߘࠇߙࠇ⵾
R1
ㅧࡔ࡯ࠞ࡯߇⇣ߥࠆ߽ߩߢ޽ࠆ‫ޕ‬
䋺Coated㩷 area
⴫ ⊕⦡Ⴃᢱߩ․ᓽ
ฬ⒓
9JKVGRCKPV#
9JKVGRCKPV$
ዉ㔚ᕈ
㕖ዉ㔚ᕈ
㕖ዉ㔚ᕈ
․ᕈ
ήᯏ♽⊕⦡Ⴃᢱ
5K ♽⊕⦡Ⴃᢱ
䋺Aluminum substrate
⤑ෘ=ǴO?
䋺Electrode formed
g
⴫㧞 ฦ⛘✼૕ߩ․ᓽ
ฬ⒓
)NCUU#
)NCUU$
2QN[KOKFG(KNO
․ᕈ
⍹⧷ࠟ࡜ࠬ
#NWOKPC%GTCOKEU*#
⚐ᐲ㧦㧑
࡯
ෘߐ=ǴO?
by silver paste
㩷 㩷 㩷 㩷 㩷 ࿑ 㔚ᭂ૞⵾ᓟߩ⊕⦡Ⴃᢱߩ᭎⇛࿑
⴫㧟 㔚ᭂ૞ᚑᓟߩ⹜ᢱߩኸᴺ
න૏㧦=OO?
R1
R2
R3
㔚ᭂ㑆〒㔌 I
129
宇宙航空研究開発機構特別資料　JAXA-SP-07-030
㪈㪅㪇㪜㪂㪈㪏
⴫ ฦ⹜ᢱߩ⴫㕙ᛶ᛫₸
න૏㧦=ǡ?
᷹ቯ⹜ᢱ
Alumina Ceramics HA-95
White paint A
White paint B
Glass A
Glass B
2QN[KOKFGHKNO
ᄢ᳇ਛ
˜
˜
˜
˜
˜
˜
⴫㕙ᛶ᛫₸㩷㪲㱅㪴
8 ୯ߚߛߒࠕ࡞ࡒ࠽ *# ߩߺ 8 ୯
⌀ⓨਛ
˜
˜
˜
˜
˜
˜ 㪈㪅㪇㪜㪂㪈㪎
㪈㪅㪇㪜㪂㪈㪍
㪈㪅㪇㪜㪂㪈㪌
㪈㪅㪇㪜㪂㪈㪋
㪈㪅㪇㪜㪂㪈㪊
㪈㪅㪇㪜㪄㪇㪉 㪈㪅㪇㪜㪂㪇㪇 㪈㪅㪇㪜㪂㪇㪉 㪈㪅㪇㪜㪂㪇㪋 㪈㪅㪇㪜㪂㪇㪍
ኈེౝ࿶ജ㩷㪲㪧㪸㪴
⴫ ฦ⹜ᢱߩ૕Ⓧᛶ᛫₸
න૏㧦=ǡO?
࿑ ኈེౝ࿶ജߣ⴫㕙ᛶ᛫₸ߩ㑐ଥ
*#
8 ୯ߚߛߒࠕ࡞ࡒ࠽ *# ߩߺ 8 ୯
ᄢ᳇ਛ
˜
˜
˜
˜
˜
˜
⌀ⓨਛ
˜
˜
˜
˜
˜
˜ ૕Ⓧᛶ᛫₸㩷㪲㱅㫄㪴
᷹ቯ⹜ᢱ
Alumina Ceramics HA-95
White paint A
White paint B
Glass A
Glass B
2QN[KOKFGHKNO
㪟㪼ዉ౉
ᄢ᳇⏕⹺
ឃ᳇ਛ
㪈㪅㪇㪜㪂㪈㪇
㪈㪅㪇㪜㪂㪇㪐
㪈㪅㪇㪜㪂㪇㪏
ᄢ᳇ਛ
ឃ᳇ਛ
ᄢ᳇ዉ౉ਛ
㪈㪅㪇㪜㪂㪇㪎
㪈㪅㪇㪜㪄㪇㪊 㪈㪅㪇㪜㪄㪇㪈 㪈㪅㪇㪜㪂㪇㪈 㪈㪅㪇㪜㪂㪇㪊 㪈㪅㪇㪜㪂㪇㪌
ኈེౝ࿶ജ㩷㪲㪧㪸㪴
⴫ ߦฦ⹜ᢱߩ⌀ⓨਛᄢ᳇ਛߩ૕Ⓧᛶ᛫₸ࠍ␜ߔ‫ޕ‬૕
࿑ ኈེౝ࿶ജߣ⴫㕙ᛶ᛫₸ߩ㑐ଥ
9JKVGRCKPV#
Ⓧᛶ᛫₸ߪ⌀ⓨਛߣᄢ᳇ਛߢ⊕⦡Ⴃᢱࠍ㒰ߊߔߴߡߩ⹜
ኈེౝ࿶ജࠍ ˜2C ߹ߢૐਅߐߖࠆߣ૕Ⓧᛶ᛫₸
ᢱߦ߅޿ߡ߶ߣࠎߤᄌࠊࠄߥ޿୯ߣߥߞߚ߇⊕⦡Ⴃᢱ
߇ ˜ǡ㨙ߦჇടߒߘߩᓟߐࠄߦኈེౝ࿶ജࠍૐਅ
ߛߌߪᄢ᳇ਛߦᲧߴ⌀ⓨਛߢߪᄢ߈ߊჇടߒߚ‫ޕ‬
ߐߖߡ߽૕Ⓧᛶ᛫₸ߦᄌൻߪή߆ߞߚ‫⌀ޕ‬ⓨⅣႺਅߢߪ
⌀ⓨਛߢߩ⴫㕙ᛶ᛫₸߇⌀ⓨኈེౝߩ࿶ജߢߤߩࠃ
ᄢ᳇࿶ᤨߦᲧߴ૕Ⓧᛶ᛫₸߇㧞ᩴ߶ߤᕆჇߒߚ‫ߩߘޕ‬ᓟ
߁ߦᄌൻߒߡ޿ߊߩ߆ࠍ⺞ߴࠆߚ߼ᰴߩࠃ߁ߥታ㛎ࠍ
ᄢ᳇ࠍዉ౉ߒߡኈེౝ࿶ജࠍჇടߐߖࠆߣ˜2C એ
ⴕߞߚ‫⹜ޕ‬㛎ኈེౝࠍᄢ᳇࿶ߦߒ⌀ⓨࡐࡦࡊߢ 㧙2C
਄߆ࠄ૕Ⓧᛶ᛫₸ߦᷫዋ߇⷗ࠄࠇߐࠄߦᄢ᳇࿶߹ߢᚯ
⒟ᐲߩ⌀ⓨ߹ߢឃ᳇ߒߚᓟ*G ࠟࠬࠍኈེౝߦዉ౉ߒߡ
ߒߚߣߎࠈ૕Ⓧᛶ᛫₸ߪ ˜ǡ㨙ߣߥߞߚ‫ߎߩߎޕ‬
࿶ജࠍᄢ᳇࿶߹ߢᚯߒߘߩᓟኈེౝࠍᄢ᳇ᦑ㔺ߒߚ‫ߘޕ‬
ߣ߆ࠄ⊕⦡Ⴃᢱ # ߪᄢ᳇࿶ߦㄭ޿࿶ജߢ૕Ⓧᛶ᛫₸ߦᄌ
ߩ㑆ߦ޿ߊߟ߆ߩࡐࠗࡦ࠻ߢ⴫㕙ᛶ᛫₸᷹ቯࠍⴕߞߚ‫ޕ‬
ൻ߇⿠ߎࠆߎߣ߇⏕⹺ߐࠇߚ‫⦡⊕ޕ‬Ⴃᢱ # ߪ⌀ⓨਛߦߥ
ߎߩߣ߈⹜ᢱߦߪࠕ࡞ࡒ࠽ *# ࠍ↪޿ߚ‫ޕ‬
ࠆߣႣᢱౝߩ᳓ಽ߇ᛮߌߚߎߣ߿Ⴃᢱߩ⁁ᘒߦߥࠎࠄ
࿑ ߦ␜ߐࠇࠆࠃ߁ߦᄢ᳇࿶߆ࠄ ˜2C ߦኈེ
߆ߩᄌൻ߇⿠߈ߚߎߣ߇੍ᗐߐࠇ⹜ᢱ๟࿐ߩⅣႺߩᓇ
ౝ࿶ജࠍૐਅߐߖߡ޿ߊߣኈེౝ࿶ജߩૐਅߣߣ߽ߦ
㗀ࠍฃߌ߿ߔ޿ߎߣ߇⠨߃ࠄࠇࠆ‫ޕ‬
⴫㕙ᛶ᛫₸߇Ⴧടߒߚ‫৻ޕ‬ᣇኈེౝ࿶ജࠍ ˜2C
߆ࠄߐࠄߦਅߍߡ߽⴫㕙ᛶ᛫₸ߪჇടߔࠆߎߣߥߊ߶
5.
߷৻ቯߩ୯ࠍ␜ߒߚ‫ߩߘޕ‬ᓟឃ᳇ߒߚ⁁ᘒ߆ࠄᄢ᳇࿶ߦ
߹ߣ߼
⌀ⓨਛߩ⴫㕙ᛶ᛫₸ߪ᧚ᢱߦࠃߞߡߘߩ਄᣹₸ߪߐ
ߥࠆ߹ߢ *G ࠟࠬࠍዉ౉ߔࠆߣห࿑ߦ␜ߔࠃ߁ߦ⴫㕙ᛶ
߹ߑ߹ߢ޽ࠆ߇ᄢ᳇ਛߩ୯ࠃࠅ߽Ⴧടߔࠆߎߣ߇᣿ࠄ߆
᛫₸ߪᷫዋߖߕ⌀ⓨⅣႺߩ⴫㕙ᛶ᛫₸ߣห᭽ߩ୯ࠍ␜
ߦߥߞߚ‫ᧄޕ‬ታ㛎ߦ߅޿ߡߪࡐ࡝ࠗࡒ࠼ࡈࠖ࡞ࡓߢߪ
ߒߚ‫ߩߘߦࠄߐޕ‬ᓟኈེౝߦᄢ᳇ࠍዉ౉ߔࠆߣ⴫㕙ᛶ᛫
⴫㕙ᛶ᛫₸߇⌀ⓨਛߣᄢ᳇ਛߣߢᄌൻ߇⷗ࠄࠇߥ߆ߞ
₸ߪૐਅߒߚ‫ࠄ߆ߣߎߩߎޕ‬ᄢ᳇ਛߩ⴫㕙ᛶ᛫₸ߩ୯ߦ
ߚ‫৻ޕ‬ᣇ‫ޔ‬૕Ⓧᛶ᛫₸ߪ⊕⦡Ⴃᢱࠍ㒰ߊߔߴߡߩ᧚ᢱߢ
ߪ๟࿐ⅣႺߩ᳓⫳᳇ߣߘߩๆ⌕㊂߇ᄢ߈ߊ㑐ࠊߞߡ޿ࠆ
⌀ⓨਛߣᄢ᳇ਛߣߢหߓ୯ࠍ␜ߒߚ‫⦡⊕ޕ‬Ⴃᢱߪߘߩ୯
น⢻ᕈ߇޽ࠆߎߣ߇ࠊ߆ࠆ‫ޕ‬
߇⌀ⓨਛߢჇടߔࠆߎߣ߇᣿ࠄ߆ߦߥߞߚ‫ޕ‬
৻ᣇ⴫㧡ߦ␜ߔࠃ߁ߦ૕Ⓧᛶ᛫₸ߪ‫⦡⊕ޔ‬Ⴃᢱએᄖߪ
ᄢ᳇ਛߣ⌀ⓨਛߢ߶ߣࠎߤᄌൻ߇⷗ࠄࠇߥ߆ߞߚ‫ࠇߎޕ‬
⻢ ㄉ
ߪ૕Ⓧᛶ᛫₸߇⛘✼૕ౝㇱߦᵹࠇࠆ㔚ᵹ߆ࠄ᳞߼ࠄࠇ
ᧄ⎇ⓥࠍㅴ߼ࠆߦ޽ߚࠅ߹ߒߡ,⁛┙ⴕ᡽ᴺੱᖱႎㅢା⎇ⓥ
ߎࠇࠄߪ᧚ᢱ࿕᦭ߩ୯ߢ޽ࠅ๟࿐ⅣႺߩᓇ㗀ࠍฃߌߥ
ᯏ᭴߆ࠄ⊕⦡Ⴃᢱߩឭଏࠍฃߌ߹ߒߚߎߣࠍ,ᷓߊᗵ⻢޿ߚ
޿ߚ߼ߢ޽ࠆ‫⦡⊕ߒ߆ߒޕ‬Ⴃᢱߛߌߪ૕Ⓧᛶ᛫₸ߩ୯
ߒ߹ߔ‫ޕ‬
߇⌀ⓨਛߣᄢ᳇ਛߣߢᄢ߈ߊ⇣ߥߞߚ‫ߡ޿ߟߦࠇߎޕ‬
ࠃࠅ⹦⚦ߦ⺞ߴࠆߚ߼૕Ⓧᛶ᛫₸ߩኈེౝ࿶ജଐሽᕈ
ᢥ ₂
ࠍ⺞ߴߚ‫ޕ‬࿑㧡ߦ⊕⦡Ⴃᢱ # ߩ႐วߩኈེౝ࿶ജߣ૕Ⓧ
㧔1㧕ᣣᧄⷙᩰදળ✬㧦
‫ޟ‬JIS ࡂࡦ࠼ࡉ࠶ࠢ࠮࡜ࡒ࠶ࠢࠬ‫ޠ‬, Vol.35,
pp.140-207 (2002)
ᛶ᛫₸ߩ㑐ଥࠍ␜ߔ‫ᦨޕ‬ೋߩᄢ᳇࿶᧦ઙਅߢߪ࿑ߩ৻⇟
ฝਅߩὐߢ૕Ⓧᛶ᛫₸ߪ ˜ǡ㨙ߢ޽ߞߚ‫ޕ‬
130