JP2001073007A - Nickel powder for laminated ceramic capacitor - Google Patents
Nickel powder for laminated ceramic capacitorInfo
- Publication number
- JP2001073007A JP2001073007A JP24489699A JP24489699A JP2001073007A JP 2001073007 A JP2001073007 A JP 2001073007A JP 24489699 A JP24489699 A JP 24489699A JP 24489699 A JP24489699 A JP 24489699A JP 2001073007 A JP2001073007 A JP 2001073007A
- Authority
- JP
- Japan
- Prior art keywords
- nickel powder
- nickel
- content
- grain size
- slurry
- 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.)
- Pending
Links
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 title claims abstract description 85
- 239000003985 ceramic capacitor Substances 0.000 title claims abstract description 12
- 239000002245 particle Substances 0.000 claims description 26
- 230000003746 surface roughness Effects 0.000 abstract description 16
- 239000002002 slurry Substances 0.000 abstract description 15
- 229910052759 nickel Inorganic materials 0.000 abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 6
- 238000000034 method Methods 0.000 description 11
- 229910021586 Nickel(II) chloride Inorganic materials 0.000 description 9
- 239000007789 gas Substances 0.000 description 9
- QMMRZOWCJAIUJA-UHFFFAOYSA-L nickel dichloride Chemical compound Cl[Ni]Cl QMMRZOWCJAIUJA-UHFFFAOYSA-L 0.000 description 9
- 239000007788 liquid Substances 0.000 description 8
- 239000011362 coarse particle Substances 0.000 description 7
- 239000010419 fine particle Substances 0.000 description 5
- 239000000843 powder Substances 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000007858 starting material Substances 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- WUOACPNHFRMFPN-SECBINFHSA-N (S)-(-)-alpha-terpineol Chemical compound CC1=CC[C@@H](C(C)(C)O)CC1 WUOACPNHFRMFPN-SECBINFHSA-N 0.000 description 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- KZBUYRJDOAKODT-UHFFFAOYSA-N Chlorine Chemical compound ClCl KZBUYRJDOAKODT-UHFFFAOYSA-N 0.000 description 1
- 239000001856 Ethyl cellulose Substances 0.000 description 1
- 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 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 1
- 229910052581 Si3N4 Inorganic materials 0.000 description 1
- OVKDFILSBMEKLT-UHFFFAOYSA-N alpha-Terpineol Natural products CC(=C)C1(O)CCC(C)=CC1 OVKDFILSBMEKLT-UHFFFAOYSA-N 0.000 description 1
- 229940088601 alpha-terpineol Drugs 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000032798 delamination Effects 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 238000010894 electron beam technology Methods 0.000 description 1
- 229920001249 ethyl cellulose Polymers 0.000 description 1
- 235000019325 ethyl cellulose Nutrition 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910000041 hydrogen chloride Inorganic materials 0.000 description 1
- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000004439 roughness measurement Methods 0.000 description 1
- 238000007650 screen-printing Methods 0.000 description 1
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、積層セラミックコ
ンデンサの内部電極形成用導電ペーストフィラーの材料
に用いられる積層セラミックコンデンサ用ニッケル粉に
関する。The present invention relates to a nickel powder for a multilayer ceramic capacitor used as a material for a conductive paste filler for forming internal electrodes of a multilayer ceramic capacitor.
【０００２】[0002]
【従来の技術】Ｎｉ、Ｃｕ、Ａｇ等の導電性の金属粉
は、積層セラミックコンデンサの内部電極形成用として
有用であり、とりわけニッケル粉は、従来のＰｄ粉等に
比べて安価なため注目されている。そして、積層セラミ
ックコンデンサの小型化、大容量化に伴って内部電極は
１〜２μｍ前後の薄層化の傾向にあり、したがって、ニ
ッケル粉の粒径は１μｍ、もしくはそれ以下であること
が要求されてきている。2. Description of the Related Art Conductive metal powders such as Ni, Cu, and Ag are useful for forming internal electrodes of multilayer ceramic capacitors, and nickel powder is particularly attracting attention because it is less expensive than conventional Pd powders. ing. With the miniaturization and large capacity of the multilayer ceramic capacitor, the internal electrodes tend to be thinner to about 1 to 2 μm. Therefore, the particle size of the nickel powder is required to be 1 μm or less. Is coming.
【０００３】このような特性を満足するニッケル粉とし
ては、ニッケルの純度が９９．５ｗｔ％以上で、しかも
粒径が０．０５〜１．０μｍの微細な球状ニッケル粉
が、特開平３−２８０３０４号公報に開示されている。
このニッケル粉によれば、電極層中の充填密度を高くす
ることができるので、焼成後の電極層の比抵抗が小さ
く、また、デラミネーション（剥離）やクラックが起こ
りにくいとされている。As a nickel powder satisfying such characteristics, fine spherical nickel powder having a nickel purity of 99.5 wt% or more and a particle size of 0.05 to 1.0 μm is disclosed in Japanese Patent Application Laid-Open No. 3-280304. No. 6,086,045.
According to this nickel powder, the packing density in the electrode layer can be increased, so that the specific resistance of the fired electrode layer is small, and delamination (peeling) and cracks are less likely to occur.
【０００４】[0004]
【発明が解決しようとする課題】ところで、ニッケル粉
の製造方法としては、塩化ニッケルガスを水素ガスによ
り還元させる気相還元法が近年では一般的となってい
る。同方法は、球状ニッケル粉を効率よく製造すること
ができるといった利点を備えているものの、粒径が１μ
ｍ以上のニッケル粉が含まれる場合も多かった。粒径１
μｍ以上のニッケル粉は、電極間のショートや電極層の
ボイドといった問題を招来させやすく、特性上好ましい
ものではない。そこで、１μｍ以上の粗粒を含まない高
品質のニッケル粉が望まれている。Incidentally, as a method for producing nickel powder, a gas phase reduction method in which nickel chloride gas is reduced with hydrogen gas has become popular in recent years. This method has the advantage that spherical nickel powder can be efficiently produced, but the particle size is 1 μm.
m or more in many cases. Particle size 1
Nickel powder of μm or more tends to cause problems such as short-circuiting between electrodes and voids in the electrode layer, and is not preferable in characteristics. Therefore, high-quality nickel powder containing no coarse particles of 1 μm or more is desired.
【０００５】本発明は上記事情に鑑みてなされたもの
で、以下を目的としている。 粗粒の含有率が低く、粒度分布の狭い積層セラミック
コンデンサ用ニッケル粉を提供する。 ペースト化した際の表面粗さが小さい積層セラミック
コンデンサ用ニッケル粉を提供する。The present invention has been made in view of the above circumstances, and has the following objects. Provided is a nickel powder for a multilayer ceramic capacitor having a low content of coarse particles and a narrow particle size distribution. Provided is a nickel powder for a multilayer ceramic capacitor having a small surface roughness when pasted.
【０００６】[0006]
【課題を解決するための手段】本発明者らは、塩化ニッ
ケルの気相還元で得たニッケル粉につき、粒径２μｍ以
上のニッケル粉の含有率が異なるサンプルごとにペース
ト化して表面粗さを調べたところ、粒径２μｍ以上のニ
ッケル粉が１００万個当たり１４００個前後存在するニ
ッケル粉の場合には満足する表面粗さは得られなかった
が、５０個前後であると良好な表面粗さを示すことを見
い出した。このことから、５０〜１４００個のほぼ中間
である７００個相当が存在するまでニッケル粉を分級す
れば実用上問題ない表面粗さが得られるであろうと推測
し、本発明に至った。すなわち本発明の積層セラミック
コンデンサ用ニッケル粉は、平均粒径０．１〜１．０μ
ｍのニッケル粉であって、粒径２μｍ以上のニッケル粉
の含有率が、個数基準において７００／１００万以下に
あることを特徴としている。Means for Solving the Problems The present inventors paste the nickel powder obtained by the gas phase reduction of nickel chloride into samples having different contents of nickel powder having a particle diameter of 2 μm or more to reduce the surface roughness. According to the examination, a satisfactory surface roughness could not be obtained in the case of nickel powder having a particle diameter of 2 μm or more of about 1400 per 1 million pieces, but a good surface roughness was obtained in the case of about 50 pieces of nickel powder. To show that From this, it was presumed that if the nickel powder was classified until approximately 700, which is almost intermediate between 50 and 1400, a surface roughness that would be practically acceptable would be obtained, leading to the present invention. That is, the nickel powder for a multilayer ceramic capacitor of the present invention has an average particle size of 0.1 to 1.0 μm.
m, wherein the content of the nickel powder having a particle diameter of 2 μm or more is 700 / 1,000,000 or less on a number basis.
【０００７】次に、本発明のより具体的な手段を説明す
る。Ａ．ニッケル粉の生成 ニッケル粉は、気相還元法により生成させることができ
るが、原料ならびに生成法は特に制限されない。具体的
には、次の方法が挙げられる。 固体塩化ニッケルを出発原料とし、この固体塩化ニッ
ケルを加熱蒸発させて発生する塩化ニッケルガスと水素
ガスを反応させる。 固体ニッケルを出発原料とし、この固体ニッケルに塩
素ガスを接触させて塩化ニッケルガスを発生させ、この
塩化ニッケルガスと水素ガスを反応させる。Next, more specific means of the present invention will be described. A. Formation of Nickel Powder Nickel powder can be generated by a gas phase reduction method, but the raw material and the generation method are not particularly limited. Specifically, the following method can be used. Using solid nickel chloride as a starting material, nickel chloride gas generated by heating and evaporating the solid nickel chloride is reacted with hydrogen gas. Using solid nickel as a starting material, a chlorine gas is brought into contact with the solid nickel to generate a nickel chloride gas, and the nickel chloride gas and a hydrogen gas are reacted.
【０００８】Ｂ．ニッケル粉の分級方法 粒径１μｍ付近のニッケル粉、すなわち粗粒を分級する
方法としては、液体サイクロンや気流分級器等の一般的
な分級装置を用いればよい。しかしながら、生成ニッケ
ル粉の表面には塩化水素ガスや塩化ニッケルが付着ある
いは吸着しており、通常これらを水洗処理で除去してい
ることから、ニッケル粉を水に分散させてスラリー化
し、このスラリーを液体サイクロンに供給して粗粒を分
級する方法が合理的で好ましい。 B. Nickel Powder Classification Method As a method for classifying nickel powder having a particle size of about 1 μm, that is, coarse particles, a general classification device such as a liquid cyclone or an airflow classifier may be used. However, hydrogen chloride gas and nickel chloride are attached or adsorbed on the surface of the generated nickel powder, and since these are usually removed by a water washing treatment, the nickel powder is dispersed in water to form a slurry. A method of classifying coarse particles by supplying the liquid to a hydrocyclone is rational and preferred.
【０００９】液体サイクロンとしては、細粒を装置のト
ップ部（上部）から排出し、粗粒を装置のボトム部（底
部）から排出するタイプの二液分離型や、細粒より細か
な微細粒を装置のトップ部から排出し、細粒を装置のミ
ドル部（中間部）から排出し、粗粒を装置のボトム部か
ら排出するタイプの三液分離型が挙げられる。これらの
中では、粒径を細かく制御することができる観点から後
者のタイプがより好ましく用いられる。トップ部および
／またはミドル部から排出されたニッケル粉が、本発明
のニッケル粉とされる。As the liquid cyclone, a two-liquid separation type in which fine particles are discharged from the top part (upper part) of the apparatus and coarse particles are discharged from the bottom part (bottom part) of the apparatus, or fine particles finer than fine particles Is discharged from the top part of the apparatus, fine particles are discharged from the middle part (intermediate part) of the apparatus, and coarse particles are discharged from the bottom part of the apparatus. Among these, the latter type is more preferably used from the viewpoint that the particle size can be finely controlled. The nickel powder discharged from the top part and / or the middle part is the nickel powder of the present invention.
【００１０】液体サイクロンの材質は、耐食性および耐
摩耗性を確保する上でセラミックス製が好ましい。セラ
ミックスとしては、アルミナや窒化ケイ素が好ましい。
液体サイクロンは、１基あるいは複数を並列させて稼動
させてもよく、複数の液体サイクロンを並列稼動させる
ことにより、大量生産を可能とし生産性向上の上で効果
的である。The material of the liquid cyclone is preferably made of ceramics in order to ensure corrosion resistance and wear resistance. As the ceramics, alumina and silicon nitride are preferable.
One or a plurality of hydrocyclones may be operated in parallel, and by operating a plurality of hydrocyclones in parallel, mass production is possible, which is effective in improving productivity.
【００１１】ニッケル粉をスラリー化する際の媒体とし
ては、上記のように水が好ましく用いられる。水の中
に、平均粒径０．１〜１．０μｍのニッケル粉を分散さ
せてスラリーを得、これを液体サイクロンに供給するわ
けであるが、スラリー中のニッケル粉の含有率（スラリ
ー濃度）は、２０〜３０ｗｔ％が好ましい。スラリー濃
度が２０ｗｔ％を下回るとスラリー中のニッケル粉含有
率が高まって分級効率が向上するが、生産性の低下を招
くので好ましくない。逆に、スラリー濃度が３０ｗｔ％
を超えると分級効率が低下するので好ましくない。As a medium for making the nickel powder into a slurry, water is preferably used as described above. A nickel powder having an average particle size of 0.1 to 1.0 μm is dispersed in water to obtain a slurry, which is supplied to a liquid cyclone. The content of the nickel powder in the slurry (slurry concentration) Is preferably 20 to 30 wt%. If the slurry concentration is less than 20% by weight, the content of nickel powder in the slurry is increased and the classification efficiency is improved, but this is not preferable because the productivity is lowered. Conversely, the slurry concentration is 30wt%
If it exceeds, the classification efficiency is undesirably reduced.
【００１２】Ｃ．ニッケル粉の好ましい態様 上記分級方法によって得られた本発明に係るニッケル粉
は、前述の如く、平均粒径０．１〜１．０μｍであっ
て、粒径２μｍ以上のニッケル粉の含有率が、個数基準
において７００／１００万以下にあることを特徴として
いる。このようなニッケル粉をペーストに用いると、セ
ラミックコンデンサの内部電極層の膜厚の均一性が良好
となる。粒径２μｍ以上のニッケル粉の含有率に関して
は、７００／１００万以下が必須であり、３００／１０
０万以下であれば好ましく、１００／１００万以下であ
ればさらに好ましく、５０／１００万以下であれば一層
好ましい。 C. The preferred embodiment of the nickel powder The nickel powder according to the present invention obtained by the classification method has an average particle diameter of 0.1 to 1.0 μm and a content of the nickel powder having a particle diameter of 2 μm or more, as described above, It is characterized by being 700 / 1,000,000 or less on a number basis. When such nickel powder is used for the paste, the uniformity of the film thickness of the internal electrode layer of the ceramic capacitor is improved. Regarding the content of nickel powder having a particle size of 2 μm or more, 700 / 1,000,000 or less is essential, and 300/10
It is preferably at most 100,000, more preferably at most 100 / 1,000,000, more preferably at most 50 / 1,000,000.
【００１３】ニッケル粉の平均粒径は、小さければ小さ
いほど好ましいが、微細になるにつれニッケル粉どうし
が凝集しやすく、その結果、内部電極中にボイドが形成
されやすくなる。このため、１μｍ程度の内部電極を形
成するためのニッケル粉としては、平均粒径が０．２〜
０．４μｍが好ましい。The smaller the average particle size of the nickel powder, the better. However, the finer the powder, the easier it is for the nickel powder to agglomerate, resulting in the formation of voids in the internal electrode. For this reason, nickel powder for forming an internal electrode of about 1 μm has an average particle size of 0.2 to 0.2 μm.
0.4 μm is preferred.
【００１４】[0014]
【実施例】以下、本発明に基づく実施例を説明する。［実施例１：ニッケル粉の分級試験］ 塩化ニッケルの気
相還元法により製造された２種類のニッケル粉（平均粒
径０．６２μｍと０．６５μｍ）を、比較例の試料とし
た。これら試料（Ｎｏ．１，Ｎｏ２）のニッケル粉中に
存在する２μｍ以上のニッケル粉の個数割合を顕微鏡を
用いて調べたところ、Ｎｏ．１は１４０５／１００万、
Ｎｏ．２は７３６／１００万であった。Embodiments of the present invention will be described below. [Example 1: Classification test of nickel powder] Two kinds of nickel powders (average particle diameters 0.62 µm and 0.65 µm) produced by a gas phase reduction method of nickel chloride were used as samples of comparative examples. The number ratio of nickel powder of 2 μm or more present in the nickel powder of these samples (No. 1 and No. 2) was examined using a microscope. 1 is 1405 / 1,000,000,
No. 2 was 736 / 1,000,000.
【００１５】次に、上記各比較例のニッケル粉をそれぞ
れ水に分散させ、スラリー濃度（スラリー中のニッケル
粉のｗｔ％）１０ｗｔ％にスラリー化した。これらスラ
リーを、三液分離型の液体サイクロン（村田工業社製：
ＴＲ−５型スーパークロン）に供給圧力６ｋｇ／ｃｍ２
で供給して分級し、微細粒排出口であるトップ部から排
出されたニッケル粉を、それぞれ実施例のニッケル粉と
して得た。これら実施例のニッケル粉中に存在する２μ
ｍ以上のニッケル粉の個数割合を顕微鏡を用いて調べた
ところ、Ｎｏ．１は３３／１００万、Ｎｏ．２は４２／
１００万であった。分級試験の結果を、表１に示す。Next, the nickel powder of each of the above comparative examples was dispersed in water, and slurried to a slurry concentration (wt% of nickel powder in the slurry) of 10 wt%. These slurries are converted into a three-liquid separation type cyclone (Murata Industries:
TR-5 type supercron) supply pressure 6kg / cm 2
, And classified, and the nickel powder discharged from the top portion, which is the fine particle discharge port, was obtained as the nickel powder of each example. 2 μm present in the nickel powder of these examples
When the number ratio of the nickel powder having a particle size of at least m was examined using a microscope, it was determined that No. No. 1 is 33 / 1,000,000, No. 2 is 42 /
One million. Table 1 shows the results of the classification test.
【００１６】[0016]
【表１】 [Table 1]
【００１７】表１で明らかなように、Ｎｏ．１，２いず
れの試料も、液体サイクロンによる分級後のニッケル粉
中における２μｍ以上のニッケル粉の個数が格段に減
り、本発明のニッケル粉を得ることができた。As apparent from Table 1, No. In each of Samples 1 and 2, the number of nickel powder of 2 μm or more in the nickel powder after classification by the hydrocyclone was significantly reduced, and the nickel powder of the present invention could be obtained.
【００１８】［実施例２：ニッケル電極層の表面粗さ試
験］上記試料Ｎｏ．１のニッケル粉の分級前と分級後の
平均粒径を調べ、次いで、これらをペースト化して基板
上に塗布し、該基板を加熱して液分を揮発させ電極層を
形成し、その表面粗さを測定した。表面粗さの測定条件
等は、次の通りである。 Example 2 Surface Roughness Test of Nickel Electrode Layer
Test] The above sample No. The average particle size of the nickel powder before and after classification was examined, then these were made into a paste and applied on a substrate, and the substrate was heated to evaporate the liquid component to form an electrode layer, and the surface roughness was adjusted. Was measured. The conditions for measuring the surface roughness are as follows.
【００１９】 ペースト組成 α−テルピネオール（４２ｗｔ％） エチルセルロース （３ｗｔ％） ニッケル粉 （５５ｗｔ％） 基板 ガラス ペースト塗布装置 スクリーン印刷機 ペースト揮発条件 ４００℃の窒素ガス雰囲気 表面粗さ測定装置 電子線三次元粗さ解析装置 （エリオニクス社製：ＥＲＡ−８０００） 表面粗さ測定方法 走査線ごとに計測される粗さ曲線とその中心線に囲まれ た部分の面積を横方向長さで割った値−中心線平均粗さ を１視野の表面粗さとし、視野サンプル数１０個の平均 値を、そのペーストの表面粗さとした。 平均粒径および表面粗さの測定結果を、表２に示す。Paste composition α-terpineol (42 wt%) Ethyl cellulose (3 wt%) Nickel powder (55 wt%) Substrate Glass Paste coating device Screen printing machine Paste volatilization condition Nitrogen gas atmosphere at 400 ° C. Surface roughness measuring device Electron beam three-dimensional roughness Surface analyzer (ELIONIX: ERA-8000) Surface roughness measurement method Roughness curve measured for each scanning line and the area of the area surrounded by the center line divided by the horizontal length-center line The average roughness was defined as the surface roughness of one visual field, and the average value of 10 visual field samples was defined as the surface roughness of the paste. Table 2 shows the measurement results of the average particle size and the surface roughness.
【００２０】[0020]
【表２】 [Table 2]
【００２１】表２で明らかなように、分級後のニッケル
粉をペースト化させて形成した電極層の表面粗さは、分
級前のニッケル粉と比べるとおよそ半分まで平滑化さ
れ、積層セラミック用のニッケル粉としてきわめて有用
であることが確かめられた。As is clear from Table 2, the surface roughness of the electrode layer formed by pasting the nickel powder after classification is smoothed to about half that of the nickel powder before classification, and It was confirmed that it was extremely useful as nickel powder.
【００２２】[0022]
【発明の効果】以上説明したように本発明は、粒径２μ
ｍ以上のニッケル粉の含有率が個数基準において７００
／１００万以下にある平均粒径０．１〜１．０μｍのニ
ッケル粉であるから、粗粒の含有率が低く、かつ粒度分
布が狭い上、ペースト化した際の表面粗さが小さく、し
たがって、積層セラミックコンデンサ用ニッケル粉とし
てきわめて有望である。As described above, the present invention has a particle size of 2 μm.
m is not less than 700 based on the number of nickel powder.
/ 1,000,000 or less nickel powder having an average particle size of 0.1 to 1.0 μm, the content of coarse particles is low, the particle size distribution is narrow, and the surface roughness when pasted is small. It is very promising as nickel powder for multilayer ceramic capacitors.
Claims (1)
粉であって、粒径２μｍ以上のニッケル粉の含有率が、
個数基準において７００／１００万以下にあることを特
徴とする積層セラミックコンデンサ用ニッケル粉。1. A nickel powder having an average particle size of 0.1 to 1.0 μm, wherein the content of the nickel powder having a particle size of 2 μm or more is:
A nickel powder for a multilayer ceramic capacitor, wherein the nickel powder is 700 / 1,000,000 or less on a number basis.
Priority Applications (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24489699A JP2001073007A (en) | 1999-08-31 | 1999-08-31 | Nickel powder for laminated ceramic capacitor |
| KR10-2001-7005080A KR100422719B1 (en) | 1999-08-31 | 2000-08-24 | Nickel powder for monolithic ceramic capacitor |
| EP00954973A EP1129804A4 (en) | 1999-08-31 | 2000-08-24 | Nickel powder for monolithic ceramic capacitor |
| US09/786,032 US6454830B1 (en) | 1999-08-31 | 2000-08-24 | Nickel powder for multilayer ceramic capacitors |
| CNB008018405A CN1248814C (en) | 1999-08-31 | 2000-08-24 | Nickel powder for monolithic ceramic capacitor |
| PCT/JP2000/005688 WO2001015838A1 (en) | 1999-08-31 | 2000-08-24 | Nickel powder for monolithic ceramic capacitor |
| TW089117620A TW522172B (en) | 1999-08-31 | 2000-08-30 | Nickel powder for laminated ceramic capacitors |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24489699A JP2001073007A (en) | 1999-08-31 | 1999-08-31 | Nickel powder for laminated ceramic capacitor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2001073007A true JP2001073007A (en) | 2001-03-21 |
Family
ID=17125601
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24489699A Pending JP2001073007A (en) | 1999-08-31 | 1999-08-31 | Nickel powder for laminated ceramic capacitor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2001073007A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009079269A (en) * | 2007-09-26 | 2009-04-16 | Dowa Electronics Materials Co Ltd | Copper powder for electroconductive paste, production method therefor and electroconductive paste |
| JP2015158000A (en) * | 2014-02-25 | 2015-09-03 | 住友金属鉱山株式会社 | Nickel powder production process |
| KR20160126286A (en) | 2015-04-23 | 2016-11-02 | 에스케이케미칼주식회사 | Water-soluble polyester resin having improved water resistance and chemical resistance, water-dispersible emulsion comprising the same, and preparation method thereof |
-
1999
- 1999-08-31 JP JP24489699A patent/JP2001073007A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009079269A (en) * | 2007-09-26 | 2009-04-16 | Dowa Electronics Materials Co Ltd | Copper powder for electroconductive paste, production method therefor and electroconductive paste |
| JP2015158000A (en) * | 2014-02-25 | 2015-09-03 | 住友金属鉱山株式会社 | Nickel powder production process |
| KR20160126286A (en) | 2015-04-23 | 2016-11-02 | 에스케이케미칼주식회사 | Water-soluble polyester resin having improved water resistance and chemical resistance, water-dispersible emulsion comprising the same, and preparation method thereof |
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