JP2015045064A5 - - Google Patents

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Publication number
JP2015045064A5
JP2015045064A5 JP2013177374A JP2013177374A JP2015045064A5 JP 2015045064 A5 JP2015045064 A5 JP 2015045064A5 JP 2013177374 A JP2013177374 A JP 2013177374A JP 2013177374 A JP2013177374 A JP 2013177374A JP 2015045064 A5 JP2015045064 A5 JP 2015045064A5
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Japan
Prior art keywords
silver
solution
reducing agent
silver powder
agent solution
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JP2013177374A
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Japanese (ja)
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JP6135405B2 (en
JP2015045064A (en
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Priority to JP2013177374A priority Critical patent/JP6135405B2/en
Priority claimed from JP2013177374A external-priority patent/JP6135405B2/en
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Publication of JP2015045064A5 publication Critical patent/JP2015045064A5/ja
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Publication of JP6135405B2 publication Critical patent/JP6135405B2/en
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Claims (6)

銀錯体を含む銀溶液と還元剤溶液とをそれぞれ定量的かつ連続的に流路内に供給し、該銀溶液と該還元剤溶液とを流路内で混合させた反応液中で銀錯体を定量的かつ連続的に還元して銀粉を得る銀粉の製造方法において、
前記流路を形成する配管内の前記銀溶液の流速に対する該配管内の同軸上に設けた配管から該銀溶液の供給方向と同方向に供給する前記還元剤溶液の流速の比を、該銀溶液と該還元剤溶液の混合時において1.5以上とすることを特徴とする銀粉の製造方法。
A silver solution containing a silver complex and a reducing agent solution are quantitatively and continuously supplied into the flow path, and the silver complex is mixed in the reaction solution in which the silver solution and the reducing agent solution are mixed in the flow path. In the method for producing silver powder, which quantitatively and continuously reduces to obtain silver powder,
The ratio of the flow rate of the reducing agent solution supplied in the same direction as the supply direction of the silver solution from a pipe provided coaxially in the pipe to the flow rate of the silver solution in the pipe forming the flow path A method for producing silver powder, characterized in that the mixing ratio of the solution and the reducing agent solution is 1.5 or more.
前記銀溶液は、塩化銀をアンモニア水に溶解することにより得られたものであることを特徴とする請求項1に記載の銀粉の製造方法。   The method for producing silver powder according to claim 1, wherein the silver solution is obtained by dissolving silver chloride in aqueous ammonia. 前記還元剤は、アスコルビン酸であり、
前記銀溶液と前記還元剤溶液との混合時における混合比を銀1モルに対して前記還元剤を0.25〜0.50モルとすることを特徴とする請求項1又は請求項2に記載の銀粉の製造方法。
The reducing agent is ascorbic acid;
The mixing ratio in mixing the silver solution and the reducing agent solution is set to 0.25 to 0.50 mol of the reducing agent with respect to 1 mol of silver. Silver powder production method.
前記還元剤溶液に、分散剤としてポリビニルアルコール、ポリビニルピロリドン、変性シリコンオイル系界面活性剤、ポリエーテル系界面活性剤から選択される少なくとも1種を添加することを特徴とする請求項1乃至請求項3のいずれか1項に記載の銀粉の製造方法。   The at least one selected from polyvinyl alcohol, polyvinyl pyrrolidone, a modified silicone oil surfactant, and a polyether surfactant as a dispersant is added to the reducing agent solution. 4. The method for producing silver powder according to any one of 3 above. 査型電子顕微鏡観察によって測定される一次粒子の平均粒径が0.3〜2.0μmであり、粒径の標準偏差をその平均値で除した値が0.25以下であることを特徴とする銀粉。 Run average particle diameter of primary particles measured by査型electron microscopy is that 0.3 to 2.0 .mu.m, wherein the value obtained by dividing the average value of the standard deviation of the particle size is 0.25 or less And silver powder. 前記一次粒子の平均粒径(SEM径)に対するBET法により求めた比表面積から算出した平均粒径(BET径)の比が0.9〜1.5であることを特徴とする請求項5に記載の銀粉。   The ratio of the average particle diameter (BET diameter) calculated from the specific surface area determined by the BET method to the average particle diameter (SEM diameter) of the primary particles is 0.9 to 1.5. Silver powder of description.
JP2013177374A 2013-08-28 2013-08-28 Silver powder and method for producing the same Expired - Fee Related JP6135405B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2013177374A JP6135405B2 (en) 2013-08-28 2013-08-28 Silver powder and method for producing the same

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Application Number Priority Date Filing Date Title
JP2013177374A JP6135405B2 (en) 2013-08-28 2013-08-28 Silver powder and method for producing the same

Publications (3)

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JP2015045064A JP2015045064A (en) 2015-03-12
JP2015045064A5 true JP2015045064A5 (en) 2016-01-21
JP6135405B2 JP6135405B2 (en) 2017-05-31

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Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20180047528A (en) * 2016-10-31 2018-05-10 엘에스니꼬동제련 주식회사 silver powder and manufacturing method of the same

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4489389B2 (en) * 2003-07-29 2010-06-23 三井金属鉱業株式会社 Method for producing fine silver powder
JP4301247B2 (en) * 2005-01-21 2009-07-22 昭栄化学工業株式会社 Method for producing spherical silver powder
JP5355007B2 (en) * 2008-09-17 2013-11-27 Dowaエレクトロニクス株式会社 Method for producing spherical silver powder
JP5814720B2 (en) * 2011-09-29 2015-11-17 アサヒプリテック株式会社 Silver powder manufacturing method

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