JP2017137566A - 銀被覆銅粉およびその製造方法 - Google Patents
銀被覆銅粉およびその製造方法 Download PDFInfo
- Publication number
- JP2017137566A JP2017137566A JP2016227021A JP2016227021A JP2017137566A JP 2017137566 A JP2017137566 A JP 2017137566A JP 2016227021 A JP2016227021 A JP 2016227021A JP 2016227021 A JP2016227021 A JP 2016227021A JP 2017137566 A JP2017137566 A JP 2017137566A
- Authority
- JP
- Japan
- Prior art keywords
- silver
- copper powder
- coated copper
- coated
- containing layer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 title claims abstract description 363
- 229910052709 silver Inorganic materials 0.000 title claims abstract description 344
- 239000004332 silver Substances 0.000 title claims abstract description 342
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 title claims abstract description 288
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 24
- 239000011248 coating agent Substances 0.000 claims abstract description 20
- 238000000576 coating method Methods 0.000 claims abstract description 20
- 229940100890 silver compound Drugs 0.000 claims abstract description 13
- 150000003379 silver compounds Chemical class 0.000 claims abstract description 13
- -1 cyanide compound Chemical class 0.000 claims abstract description 8
- KXZJHVJKXJLBKO-UHFFFAOYSA-N chembl1408157 Chemical compound N=1C2=CC=CC=C2C(C(=O)O)=CC=1C1=CC=C(O)C=C1 KXZJHVJKXJLBKO-UHFFFAOYSA-N 0.000 claims abstract description 4
- 239000002245 particle Substances 0.000 claims description 81
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 64
- 230000001186 cumulative effect Effects 0.000 claims description 49
- 238000000034 method Methods 0.000 claims description 38
- 229910052757 nitrogen Inorganic materials 0.000 claims description 32
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 31
- 229910052799 carbon Inorganic materials 0.000 claims description 31
- 238000009826 distribution Methods 0.000 claims description 26
- 229920005989 resin Polymers 0.000 claims description 20
- 239000011347 resin Substances 0.000 claims description 20
- 239000012756 surface treatment agent Substances 0.000 claims description 16
- IMQLKJBTEOYOSI-GPIVLXJGSA-N Inositol-hexakisphosphate Chemical group OP(O)(=O)O[C@H]1[C@H](OP(O)(O)=O)[C@@H](OP(O)(O)=O)[C@H](OP(O)(O)=O)[C@H](OP(O)(O)=O)[C@@H]1OP(O)(O)=O IMQLKJBTEOYOSI-GPIVLXJGSA-N 0.000 claims description 15
- IMQLKJBTEOYOSI-UHFFFAOYSA-N Phytic acid Natural products OP(O)(=O)OC1C(OP(O)(O)=O)C(OP(O)(O)=O)C(OP(O)(O)=O)C(OP(O)(O)=O)C1OP(O)(O)=O IMQLKJBTEOYOSI-UHFFFAOYSA-N 0.000 claims description 15
- 239000000467 phytic acid Substances 0.000 claims description 15
- 229940068041 phytic acid Drugs 0.000 claims description 15
- 235000002949 phytic acid Nutrition 0.000 claims description 15
- 239000002904 solvent Substances 0.000 claims description 15
- 239000010949 copper Substances 0.000 claims description 9
- 229910052802 copper Inorganic materials 0.000 claims description 8
- XFXPMWWXUTWYJX-UHFFFAOYSA-N Cyanide Chemical compound N#[C-] XFXPMWWXUTWYJX-UHFFFAOYSA-N 0.000 claims description 7
- 239000000843 powder Substances 0.000 claims description 7
- 150000003851 azoles Chemical class 0.000 claims description 6
- 239000004020 conductor Substances 0.000 claims description 6
- CYVKTCMFCQRFIW-UHFFFAOYSA-N [Ag].N#CC#N.[K] Chemical compound [Ag].N#CC#N.[K] CYVKTCMFCQRFIW-UHFFFAOYSA-N 0.000 claims description 4
- 239000000758 substrate Substances 0.000 claims description 4
- NNFCIKHAZHQZJG-UHFFFAOYSA-N potassium cyanide Chemical compound [K+].N#[C-] NNFCIKHAZHQZJG-UHFFFAOYSA-N 0.000 claims description 3
- 150000001875 compounds Chemical class 0.000 claims description 2
- PPJLYRZMZCJFAA-UHFFFAOYSA-N [K].[K].N#CC#N Chemical compound [K].[K].N#CC#N PPJLYRZMZCJFAA-UHFFFAOYSA-N 0.000 claims 1
- 238000006243 chemical reaction Methods 0.000 abstract description 18
- 238000000889 atomisation Methods 0.000 abstract description 3
- 230000002708 enhancing effect Effects 0.000 abstract 1
- HKSGQTYSSZOJOA-UHFFFAOYSA-N potassium argentocyanide Chemical compound [K+].[Ag+].N#[C-].N#[C-] HKSGQTYSSZOJOA-UHFFFAOYSA-N 0.000 abstract 1
- XTFKWYDMKGAZKK-UHFFFAOYSA-N potassium;gold(1+);dicyanide Chemical compound [K+].[Au+].N#[C-].N#[C-] XTFKWYDMKGAZKK-UHFFFAOYSA-N 0.000 abstract 1
- 239000000243 solution Substances 0.000 description 53
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- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 26
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- 238000010248 power generation Methods 0.000 description 25
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- SQGYOTSLMSWVJD-UHFFFAOYSA-N silver(1+) nitrate Chemical compound [Ag+].[O-]N(=O)=O SQGYOTSLMSWVJD-UHFFFAOYSA-N 0.000 description 16
- 239000000126 substance Substances 0.000 description 11
- 229910021607 Silver chloride Inorganic materials 0.000 description 10
- 239000010931 gold Substances 0.000 description 10
- HKZLPVFGJNLROG-UHFFFAOYSA-M silver monochloride Chemical compound [Cl-].[Ag+] HKZLPVFGJNLROG-UHFFFAOYSA-M 0.000 description 10
- 238000003756 stirring Methods 0.000 description 10
- QRUDEWIWKLJBPS-UHFFFAOYSA-N benzotriazole Chemical compound C1=CC=C2N[N][N]C2=C1 QRUDEWIWKLJBPS-UHFFFAOYSA-N 0.000 description 9
- 239000012964 benzotriazole Substances 0.000 description 9
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- 238000005406 washing Methods 0.000 description 9
- 229910052737 gold Inorganic materials 0.000 description 8
- 239000003960 organic solvent Substances 0.000 description 8
- 229910001961 silver nitrate Inorganic materials 0.000 description 8
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 7
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 6
- 239000002738 chelating agent Substances 0.000 description 6
- 238000001914 filtration Methods 0.000 description 6
- 229910052710 silicon Inorganic materials 0.000 description 6
- 239000010703 silicon Substances 0.000 description 6
- 150000003378 silver Chemical class 0.000 description 6
- 235000012431 wafers Nutrition 0.000 description 6
- QZPSXPBJTPJTSZ-UHFFFAOYSA-N aqua regia Chemical compound Cl.O[N+]([O-])=O QZPSXPBJTPJTSZ-UHFFFAOYSA-N 0.000 description 5
- VXQBJTKSVGFQOL-UHFFFAOYSA-N 2-(2-butoxyethoxy)ethyl acetate Chemical compound CCCCOCCOCCOC(C)=O VXQBJTKSVGFQOL-UHFFFAOYSA-N 0.000 description 4
- ATRRKUHOCOJYRX-UHFFFAOYSA-N Ammonium bicarbonate Chemical compound [NH4+].OC([O-])=O ATRRKUHOCOJYRX-UHFFFAOYSA-N 0.000 description 4
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- XXJWXESWEXIICW-UHFFFAOYSA-N diethylene glycol monoethyl ether Chemical compound CCOCCOCCO XXJWXESWEXIICW-UHFFFAOYSA-N 0.000 description 4
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- MNWBNISUBARLIT-UHFFFAOYSA-N sodium cyanide Chemical compound [Na+].N#[C-] MNWBNISUBARLIT-UHFFFAOYSA-N 0.000 description 4
- DAFHKNAQFPVRKR-UHFFFAOYSA-N (3-hydroxy-2,2,4-trimethylpentyl) 2-methylpropanoate Chemical compound CC(C)C(O)C(C)(C)COC(=O)C(C)C DAFHKNAQFPVRKR-UHFFFAOYSA-N 0.000 description 3
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 3
- JPVYNHNXODAKFH-UHFFFAOYSA-N Cu2+ Chemical compound [Cu+2] JPVYNHNXODAKFH-UHFFFAOYSA-N 0.000 description 3
- 239000001856 Ethyl cellulose Substances 0.000 description 3
- ZZSNKZQZMQGXPY-UHFFFAOYSA-N Ethyl cellulose Chemical compound CCOCC1OC(OC)C(OCC)C(OCC)C1OC1C(O)C(O)C(OC)C(CO)O1 ZZSNKZQZMQGXPY-UHFFFAOYSA-N 0.000 description 3
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 3
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- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
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Abstract
【解決手段】アトマイズ法などにより得られ銅粉の表面を(銀被覆銅粉に対して)5質量%以上の銀または銀化合物からなる銀含有層で被覆して得られた銀被覆銅粉を、シアン銀カリウム溶液、シアン金カリウム溶液、シアン化カリウム溶液、シアン化ナトリウム溶液などのシアン化合物溶液に添加して、銀含有層で被覆された銅粉に3〜3000ppmのシアンを含有させる。
【選択図】図1
Description
アトマイズ法により製造された市販の銅粉(日本アトマイズ加工株式会社製のアトマイズ銅粉SF−Cu 5μm)を用意し、この(銀被覆前の)銅粉の粒度分布を求めたところ、銅粉の累積10%粒子径(D10)は2.26μm、累積50%粒子径(D50)は5.20μm、累積90%粒子径(D90)は9.32μmであった。なお、銅粉の粒度分布は、レーザー回折式粒度分布装置(日機装株式会社製のマイクロトラック粒度分布測定装置MT−3300)により測定して、累積10%粒子径(D10)、累積50%粒子径(D50)、累積90%粒子径(D90)を求めた。
シアン金カリウム(小島薬品化学株式会社製)1.4633gと、無水クエン酸(和光純薬工業株式会社製)0.8211gと、L−アスパラギン酸(和光純薬工業株式会社製)0.1708gと、クエン酸三カリウム1水和物(和光純薬工業株式会社製)0.9998gとを純水100gに加えて30℃で11分間撹拌して金めっき液を作製した。
実施例1と同様の方法により得られた(表面に銀を担持させる前の)銀被覆銅粉(銀により被覆された銅粉)をシアン(CN)1000ppmを含むNaCN水溶液に30分間浸漬させた後、押し出し水をかけながら、ろ過し、ろ紙上の固形物に純水をかけて(洗浄後の液の電位が0.5mS/m以下になるまで)洗浄し、真空乾燥機により70℃で5時間乾燥させて、表面にCNを吸着させた銀被覆銅粉を得た。
実施例1と同様の方法により得られた(表面に銀を担持させる前の)銀被覆銅粉(銀により被覆された銅粉)を王水に溶解させた後、純水を添加してろ過することにより銀を塩化銀として回収し、このように回収した塩化銀から重量法によりAgの含有量を求めたところ、銀被覆銅粉中のAg含有量は10.14質量%であった。
アトマイズ法により製造された市販の銀粉(福田金属箔粉工業株式会社製のアトマイズ銀粉HWQ 5μm)を用意し、実施例1と同様の方法により、この銀粉中のAg含有量、炭素含有量、窒素含有量、酸素含有量およびシアンの量を求めるとともに、銀粉の粒度分布を求めたところ、Ag含有量は99.9質量%以上、炭素含有量は0.006質量%、窒素含有量は0.01質量%未満、酸素含有量は0.03質量%、シアンの量は0ppmであった。また、銀粉の累積10%粒子径(D10)は2.9μm、累積50%粒子径(D50)は4.8μm、累積90%粒子径(D90)は8.0μmであり、銀被覆銅粉のBET比表面積は0.16m2/gであった。
比較例2と同様の銀粉をシアン(CN)1000ppmを含むNaCN水溶液に30分間浸漬させた後、押し出し水をかけながら、ろ過し、ろ紙上の固形物に純水をかけて(洗浄後の液の電位が0.5mS/m以下になるまで)洗浄し、真空乾燥機により70℃で5時間乾燥させて、表面にCNを吸着させた銀粉を得た後、実施例1と同様の方法により、この(表面にCNを吸着させた)銀粉中のAg含有量、炭素含有量、窒素含有量、酸素含有量およびシアンの量を求めるとともに、銀粉の粒度分布を求めたところ、Ag含有量は99.9質量%以上、炭素含有量は0.005質量%、窒素含有量は0.01質量%未満、酸素含有量は0.02質量%、シアンの量は3ppmであった。また、銀粉の累積10%粒子径(D10)は3.7μm、累積50%粒子径(D50)は8.4μm、累積90%粒子径(D90)は16.5μmであり、銀粉のBET比表面積は0.18m2/gであった。
実施例1と同様の銅粉100gを純水500gに添加して攪拌機により500rpmで攪拌しながら、この撹拌により銅粉が分散している液中に、100g/Lのシアン銀カリウムと80g/Lのピロリン酸カリウムと35g/Lのホウ酸とからなるシアン銀めっき液239.28gを30分かけて添加した後、30分間撹拌を続けて銀めっき銅粉を得た。
実施例1の銅粉に代えて、アトマイズ法により製造された市販の銅粉(DOWAエレクトロニクス株式会社製のアトマイズ銅粉AO−PCG−19)を使用した以外は、実施例1と同様の方法により、(表面に銀を担持させた)銀被覆銅粉を得た。なお、実施例1と同様の方法により、使用した銅粉の粒度分布を求めたところ、銅粉の累積10%粒子径(D10)は2.0μm、累積50%粒子径(D50)は4.9μm、累積90%粒子径(D90)は9.5μmであった。
銀担持液の添加量を0.056mLとした以外は、実施例4と同様の方法により、(表面に銀を担持させた)銀被覆銅粉を得た。
実施例5で得られた(表面に銀を担持させた)銀被覆銅粉20gを純水に添加して分散させた状態でフィチン酸0.2gを添加した後、押し出し水をかけながらヌッチェ方式でろ過し、ろ紙上の固形物を真空乾燥機により70℃で5時間乾燥させて、(表面に銀を担持させた)銀被覆銅粉の表面をフィチン酸で被覆した。
実施例5で得られた(表面に銀を担持させた)銀被覆銅粉20gを純水に添加して分散させた状態でベンゾトリアゾール0.1gを添加した後、押し出し水をかけながらヌッチェ方式でろ過し、ろ紙上の固形物を真空乾燥機により70℃で5時間乾燥させて、(表面に銀を担持させた)銀被覆銅粉の表面をベンゾトリアゾールで処理した。
実施例4と同様の方法により得られた(表面に銀を担持させる前の)銀被覆銅粉(銀により被覆された銅粉)を王水に溶解させた後、純水を添加してろ過することにより銀を塩化銀として回収し、このように回収した塩化銀から重量法によりAgの含有量を求めたところ、銀被覆銅粉中のAg含有量は10.93質量%であった。
Claims (22)
- 表面が銀含有層で被覆された銅粉をシアン化合物溶液に添加して、銀含有層で被覆された銅粉に3〜3000ppmのシアンを含有させることを特徴とする、銀被覆銅粉の製造方法。
- 前記銀含有層が銀または銀化合物からなる層であることを特徴とする、請求項1に記載の銀被覆銅粉の製造方法。
- 前記銀含有層が銀からなる層であることを特徴とする、請求項1に記載の銀被覆銅粉の製造方法。
- 前記シアンの含有量が3〜10ppmであることを特徴とする、請求項3に記載の銀被覆銅粉の製造方法。
- 前記銀被覆銅粉に対する前記銀含有層の量が5質量%以上であることを特徴とする、請求項1乃至4のいずれかに記載の銀被覆銅粉の製造方法。
- 前記シアン化合物溶液に添加する前の前記銀含有層で被覆された銅粉がシアンを含まないことを特徴とする、請求項1乃至5のいずれかに記載の銀被覆銅粉の製造方法。
- 前記シアン化合物溶液が、シアン銀カリウム溶液、シアン金カリウム溶液、シアン化カリウム溶液またはシアン化ナトリウム溶液からなることを特徴とする、請求項1乃至6のいずれかに記載の銀被覆銅粉の製造方法。
- 前記銅粉のレーザー回折式粒度分布装置により測定した累積50%粒子径(D50径)が0.1〜15μmであることを特徴とする、請求項1乃至7のいずれかに記載の銀被覆銅粉の製造方法。
- 前記銀含有層で被覆された銅粉にシアンを含有させた後に、前記銀含有層で被覆された銅粉の表面に表面処理剤を付着させることを特徴とする、請求項1乃至8のいずれかに記載の銀被覆銅粉の製造方法。
- 前記表面処理剤がフィチン酸またはアゾール類であることを特徴とする、請求項9に記載の銀被覆銅粉の製造方法。
- 表面が銀含有層で被覆された銅粉からなる銀被覆銅粉であって、この銀被覆銅粉中のシアンの量が3〜3000ppmであることを特徴とする、銀被覆銅粉。
- 前記銀含有層が銀または銀化合物からなる層であることを特徴とする、請求項11に記載の銀被覆銅粉。
- 前記銀含有層が銀からなる層であることを特徴とする、請求項11に記載の銀被覆銅粉。
- 前記シアンの含有量が3〜10ppmであることを特徴とする、請求項13に記載の銀被覆銅粉。
- 前記銀被覆銅粉に対する前記銀含有層の量が5質量%以上であることを特徴とする、請求項11乃至14のいずれかに記載の銀被覆銅粉。
- 前記銅粉のレーザー回折式粒度分布装置により測定した累積50%粒子径(D50径)が0.1〜15μmであることを特徴とする、請求項11乃至15のいずれかに記載の銀被覆銅粉。
- 前記銀被覆銅粉中の炭素含有量および窒素含有量がそれぞれ0.04質量%以上であることを特徴とする、請求項11乃至16のいずれかに記載の銀被覆銅粉。
- 前記銀含有層で被覆された銅粉の表面に表面処理剤を付着していることを特徴とする、請求項11乃至17のいずれかに記載の銀被覆銅粉。
- 前記表面処理剤がフィチン酸またはアゾール類であることを特徴とする、請求項18に記載の銀被覆銅粉。
- 請求項11乃至19のいずれかに記載の銀被覆銅粉を導体として用いたことを特徴とする、導電性ペースト。
- 溶剤および樹脂を含み、導電性紛体として請求項11乃至19のいずれかに記載の銀被覆銅粉を含むことを特徴とする、導電性ペースト。
- 請求項20または21の導電性ペーストを基板に塗布した後に硬化させることにより基板の表面に電極を形成することを特徴とする、太陽電池用電極の製造方法。
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