JPH0357160A - Zinc alloy powder having reduced gas evolution for alkaline battery and its manufacture - Google Patents
Zinc alloy powder having reduced gas evolution for alkaline battery and its manufactureInfo
- Publication number
- JPH0357160A JPH0357160A JP1193690A JP19369089A JPH0357160A JP H0357160 A JPH0357160 A JP H0357160A JP 1193690 A JP1193690 A JP 1193690A JP 19369089 A JP19369089 A JP 19369089A JP H0357160 A JPH0357160 A JP H0357160A
- Authority
- JP
- Japan
- Prior art keywords
- zinc alloy
- alloy powder
- zinc
- powder
- heat
- 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
- 239000000843 powder Substances 0.000 title claims abstract description 56
- 229910001297 Zn alloy Inorganic materials 0.000 title claims abstract description 47
- 238000004519 manufacturing process Methods 0.000 title claims description 8
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 21
- 239000007789 gas Substances 0.000 claims abstract description 17
- 239000011701 zinc Substances 0.000 claims abstract description 12
- 229910052751 metal Inorganic materials 0.000 claims abstract description 7
- 239000002184 metal Substances 0.000 claims abstract description 7
- 239000012535 impurity Substances 0.000 claims abstract description 6
- 229910052749 magnesium Inorganic materials 0.000 claims abstract description 6
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 5
- 229910052791 calcium Inorganic materials 0.000 claims abstract description 5
- 229910052733 gallium Inorganic materials 0.000 claims abstract description 5
- 229910052738 indium Inorganic materials 0.000 claims abstract description 5
- 229910052709 silver Inorganic materials 0.000 claims abstract description 5
- 229910052712 strontium Inorganic materials 0.000 claims abstract description 5
- 229910052714 tellurium Inorganic materials 0.000 claims abstract description 5
- 229910052716 thallium Inorganic materials 0.000 claims abstract description 5
- 229910052718 tin Inorganic materials 0.000 claims abstract description 5
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 12
- 229910052725 zinc Inorganic materials 0.000 claims description 11
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 8
- 229910045601 alloy Inorganic materials 0.000 claims description 7
- 239000000956 alloy Substances 0.000 claims description 7
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 5
- 239000011777 magnesium Substances 0.000 claims description 5
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 4
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 claims description 4
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 4
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 4
- 229910052797 bismuth Inorganic materials 0.000 claims description 4
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 claims description 4
- 229910052793 cadmium Inorganic materials 0.000 claims description 4
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 claims description 4
- 239000011575 calcium Substances 0.000 claims description 4
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 claims description 4
- 239000004332 silver Substances 0.000 claims description 4
- CIOAGBVUUVVLOB-UHFFFAOYSA-N strontium atom Chemical compound [Sr] CIOAGBVUUVVLOB-UHFFFAOYSA-N 0.000 claims description 4
- PORWMNRCUJJQNO-UHFFFAOYSA-N tellurium atom Chemical compound [Te] PORWMNRCUJJQNO-UHFFFAOYSA-N 0.000 claims description 4
- BKVIYDNLLOSFOA-UHFFFAOYSA-N thallium Chemical compound [Tl] BKVIYDNLLOSFOA-UHFFFAOYSA-N 0.000 claims description 4
- 239000011787 zinc oxide Substances 0.000 claims description 4
- 229920006395 saturated elastomer Polymers 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 abstract description 13
- 239000011261 inert gas Substances 0.000 abstract description 2
- 229910052745 lead Inorganic materials 0.000 abstract 1
- 238000010301 surface-oxidation reaction Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 description 9
- 230000000694 effects Effects 0.000 description 6
- 239000007773 negative electrode material Substances 0.000 description 6
- 229910052753 mercury Inorganic materials 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000012047 saturated solution Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 150000003751 zinc Chemical class 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Landscapes
- Battery Electrode And Active Subsutance (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野］
本発明は改善された特性を持つアルカリ電池用亜鉛合金
粉末及びその製造方法に関し、特に熱処理されたもので
あることを特徴とするガス発生量の少ない亜鉛合金粉末
及びその製造方法に関するものである。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a zinc alloy powder for alkaline batteries having improved characteristics and a method for producing the same, and in particular to a heat-treated zinc alloy powder, the amount of gas generated is The present invention relates to a zinc alloy powder with low carbon content and a method for manufacturing the same.
Ｃ従来技術〕
従来、アルカリ乾電池等電池の負極材としては亜鉛又は
亜鉛合金が用いられている。亜鉛は水素過電圧が高いこ
とや価格が比較的低廉であることから好んで負極材とし
て用いられてきたのであるか、亜鉛を使用することのみ
では電池使用時における水素ガスの多量発生を充分に抑
制することは困難であってそれに伴う電解液漏れなどの
問題を生じていた。C. Prior Art Conventionally, zinc or a zinc alloy has been used as a negative electrode material for batteries such as alkaline dry batteries. Zinc has been preferred as a negative electrode material due to its high hydrogen overvoltage and relatively low price, or perhaps the use of zinc alone is sufficient to suppress the generation of large amounts of hydrogen gas during battery use. It was difficult to do so, and this caused problems such as electrolyte leakage.
これらのｆｌｉ＋題を解決する目的で近年店く行われて
いる有効なガス発生抑制の方法として亜鉛を末化するこ
とが行われている。しかしながら、この方法は廃乾電池
を処分する際の深刻な公害面の問題を伴うものであるた
め、できるだけ低求化あるいは無末化で所望の効果が得
られる亜鉛合金の開発が求められるようになり、これに
応えて本発明者等も特開昭６３−３０４５７１号公報「
電池用亜鉛合金およびその製造法」において開示したよ
うにそのような亜鉛合金の開発に一応の成果を上げてい
る。In order to solve these fli+ problems, powdering zinc is an effective method of suppressing gas generation that has been widely used in recent years. However, this method involves serious pollution problems when disposing of waste dry batteries, so there is a need to develop zinc alloys that can achieve the desired effects with as little or as little powder as possible. , In response to this, the present inventors also published Japanese Patent Application Laid-Open No. 63-304571 "
As disclosed in ``Zinc Alloy for Batteries and Method for Producing the Same'', we have achieved some results in the development of such zinc alloys.
［発明が解決しようとする問題点］
上述のように環境汚染防止の上からもより一層低永化あ
るいは無永化のものでガス発生抑制効果の備わった亜鉛
合金の開発が望まれているが、本発明者等の上記公開特
許公報にも示されているように水銀の添加量は最低でも
０．３重量％以」二でなければ有効な末化はできないと
一般に認識されていたのであり、アルカリ電池の使用に
よる水素ガス発生抑制の目的には、ある程度の水銀を添
加して末化した亜鉛合金を使用することがどうしても必
要であると考えられていたのである。[Problems to be Solved by the Invention] As mentioned above, from the viewpoint of preventing environmental pollution, it is desired to develop a zinc alloy that is even more durable or non-permanent and has the effect of suppressing gas generation. As shown in the above-mentioned patent publication by the present inventors, it was generally recognized that effective disposal could not be achieved unless the amount of mercury added was at least 0.3% by weight. For the purpose of suppressing hydrogen gas generation when using alkaline batteries, it was thought that it was absolutely necessary to use a zinc alloy powdered with a certain amount of mercury added.
［課題を解決するための手段］
上記課題全解決するため、鋭意研究を続けているうちに
、本発明者等は、アルカリ電池に使用するための亜鉛合
金粉末をある条件下で熱処理することによって水素ガス
発生量が熱処理しないものに比し著しく少ない改質され
たアルカリ電池用亜鉛合金粉末とすることができること
を見い出し本発明を達威した。[Means for Solving the Problems] In order to solve all of the above problems, while continuing intensive research, the present inventors discovered that by heat-treating zinc alloy powder for use in alkaline batteries under certain conditions. The inventors have discovered that a modified zinc alloy powder for alkaline batteries can be produced in which the amount of hydrogen gas generated is significantly less than that without heat treatment, and the present invention has been achieved.
すなわち本発明は電池等の負極材として使用したときの
水素ガスの発生量が従来の亜鉛合金粉末に比し少なくと
も３０％少ない新規な亜鉛合金粉末に関し、さらに又、
アルミニウム、ガリウム、インジウム、タリウム、マグ
ネシウム、カルシウム、ストロンチウム、錫、鉛、ビス
マス、カドミウム、銀及びテルルからなる群より選ばれ
た少なくとも１種の金属を０．０００１〜０．５重量％
を含有し、残部が亜鉛及び不可避的不純物からなる亜鉛
合金を１００〜５００℃の温度下及び特定のガス雰囲気
下で熱処理することによって前記水素ガス発生量の少な
い亜鉛合金とする方法に関するものである。That is, the present invention relates to a novel zinc alloy powder that generates at least 30% less hydrogen gas than conventional zinc alloy powders when used as a negative electrode material for batteries, and furthermore,
0.0001 to 0.5% by weight of at least one metal selected from the group consisting of aluminum, gallium, indium, thallium, magnesium, calcium, strontium, tin, lead, bismuth, cadmium, silver, and tellurium.
The present invention relates to a method of producing a zinc alloy that generates a small amount of hydrogen gas by heat-treating a zinc alloy containing zinc and the remainder consisting of zinc and unavoidable impurities at a temperature of 100 to 500°C and in a specific gas atmosphere. .
［作 用］
本発明の新規な亜鉛合金粉末は、合金元素として、アル
ミニウム、ガリウム、インジウム、タリウム、マグネシ
ウム、カルシウム、ストロンチウム、錫、鉛、ビスマス
、カドミウム、銀及びテルルからなる群より這ばれた少
なくとも１種の金属を０．０００１〜０．５重量％用い
、これを亜鉛及び不可避的不純物と混合溶融して合金化
した亜鉛合金粉末を噴霧法で得た後、熱処理炉内におい
て１００〜５００℃の温度条件で熱処理をすることによ
って製造される。この場合の熱処理条件は以下の通りで
ある。[Function] The novel zinc alloy powder of the present invention contains aluminum, gallium, indium, thallium, magnesium, calcium, strontium, tin, lead, bismuth, cadmium, silver and tellurium as alloying elements. Zinc alloy powder is obtained by mixing and melting 0.0001 to 0.5% by weight of at least one metal with zinc and unavoidable impurities, and then is heated to 100 to 500% by weight in a heat treatment furnace. Manufactured by heat treatment at a temperature of ℃. The heat treatment conditions in this case are as follows.
すなわち採用可能な熱処理温度は１００〜５００℃であ
り、好ましくは３００〜４５０℃である。これは１００
℃以下では、熱処理に時間がかかり過ぎる上に効果が小
さく、又５００℃以上では、亜鉛の融点が４２０℃付近
であることから合金粉末の一部が溶融して焼結した状態
となるからである。That is, the heat treatment temperature that can be employed is 100 to 500°C, preferably 300 to 450°C. This is 100
If the temperature is below ℃, the heat treatment will take too much time and the effect will be small, and if it is above 500℃, the melting point of zinc is around 420℃, so a part of the alloy powder will melt and become sintered. be.
処理雰囲気は、大気中でもよいが粉末表面の酸化を防止
する上で、例えばＨｅ，ＮｅＳＨ２、Ｃｏ，ＮＨ３等の
不活性ガスあるいは還元性ガスの方が好ましい。The processing atmosphere may be air, but in order to prevent oxidation of the powder surface, an inert gas or reducing gas such as He, NeSH2, Co, NH3, etc. is preferable.
熱処理時間は、５分〜５時間とすることができるが、１
〜２時間が好ましい。The heat treatment time can be 5 minutes to 5 hours, but 1
~2 hours is preferred.
本発明で使用する熱処理炉としては、所定の雰囲気を保
ち得るものであればどのような構造のものでもよく、又
、加熱源としては電気、液体、気体、固体その他どのよ
うな加熱源を用・いてもよい。The heat treatment furnace used in the present invention may be of any structure as long as it can maintain a predetermined atmosphere, and the heat source may be electric, liquid, gas, solid, or any other heat source.・You can stay.
従来技術では上述組成の合金を通常のアトマイズ法によ
って製造し、永化処理することによってアルカリ電池用
亜鉛合金粉末を製造しているが、この方法ではアトマイ
ズ粉末製造時に亜鉛粉末が急冷され且つ、アトマイズに
空気が用いられる為、粉末表面に酸化皮膜が生じ、得ら
れた亜鉛合金粉末は多結晶であって添加金属も多くは偏
折して存在するものとなる。この為、亜鉛合金粉末のガ
ス発生を抑制する目的で加えた添加金属の効果は薄れる
こととなり、更に、亜鉛合金粉末の表面に生じた酸化物
層を除去する為の工程が必要となっていた。In the conventional technology, zinc alloy powder for alkaline batteries is produced by producing an alloy having the above-mentioned composition by a normal atomizing method and then subjecting it to permanent treatment. However, in this method, zinc powder is rapidly cooled during production of atomized powder, and then the atomized powder is Since air is used in the process, an oxide film is formed on the powder surface, and the resulting zinc alloy powder is polycrystalline, and most of the added metals are present in a polarized state. For this reason, the effect of the additive metal added to suppress gas generation in zinc alloy powder is weakened, and a process is also required to remove the oxide layer that has formed on the surface of zinc alloy powder. .
これに対し、本発明法では一般に非酸化性ガス雰囲気中
所定温度条件下で熱処理を行なう為、製造された亜鉛合
金粉末は結晶が均一で、安定しており、亜鉛合金粉末表
面に酸化物層ができていても上述の雰囲気処理で十分に
除去できるため、従来法では必要であった酸化物除去工
程を設ける必要がない。In contrast, in the method of the present invention, heat treatment is generally performed under a predetermined temperature condition in a non-oxidizing gas atmosphere, so the produced zinc alloy powder has uniform and stable crystals, and an oxide layer is formed on the surface of the zinc alloy powder. Even if oxides are formed, they can be sufficiently removed by the above-mentioned atmosphere treatment, so there is no need to provide an oxide removal step that was necessary in the conventional method.
又、製造された亜鉛合金粉末は電池負極材として使用さ
れた場合等におけるガス発生量が著しく少ないものであ
ることが確認された。Furthermore, it was confirmed that the produced zinc alloy powder generates significantly less gas when used as a battery negative electrode material.
この効果は極めて顕著であるため、本発明の亜鉛合金粉
末を同定する手段として用いることができる。即ち、た
とえば与えられた亜鉛合金粉末を、酸化亜鉛を飽和させ
た４５℃の４０％ＫＯＨ水溶液中に浸漬させて測定した
水素ガス発生量が、同じ刊成の熱処理されていない従来
の亜鉛合金粉末を同一の酸化亜鉛飽和溶液中に浸漬させ
て同一の条件で測定した水素ガスの発生量に比し、少な
くとも３０％少ないことが確認されれば、それは与えら
れた粉末が熱処理された本発明の亜鉛合金粉末であるこ
とを意味すると結論してよい。何故なら、従来、そのよ
うに改質された亜鉛合金粉末は存在しなかったからであ
る。Since this effect is extremely remarkable, it can be used as a means for identifying the zinc alloy powder of the present invention. That is, for example, the amount of hydrogen gas generated when a given zinc alloy powder is immersed in a 40% KOH aqueous solution at 45°C saturated with zinc oxide is higher than that of a conventional zinc alloy powder of the same publication that has not been heat treated. If it is confirmed that the amount of hydrogen gas generated is at least 30% lower than that measured under the same conditions by immersing the powder in the same zinc oxide saturated solution, it means that the powder of the present invention has been heat-treated. We can conclude that it means zinc alloy powder. This is because, conventionally, there has been no zinc alloy powder modified in this way.
以下、本発明を実施例により詳細に説明する。Hereinafter, the present invention will be explained in detail with reference to Examples.
［実施例１］
第１表に示す組或の各種亜鉛合金を、通常の噴霧状によ
り粒度４８〜＋５０メッシュの粉末として製造し、次い
でこれらの粉末を熱処理炉中にてＨ２ガス雰囲気下３５
０℃で２時間熱処理し、得られた熱処理済み亜鉛合金粉
末の一定量をＫＯＨ溶液中に入４１、水銀を０．０４重
量％添加して末化したもの（表中偶数番号の合金粉末）
と、無氷化のもの（同奇数番号の合金粉末）を、それぞ
れ酸化亜鉛を飽和させた４５℃の４０％ＫＯＨ溶液中に
浸漬させて、水素ガス発生量を測定し評価した。その結
果を第１表に示す。水素ガス発生量（ＪＩＩｌ／ｇ．ｄ
）は合金粉末１ｇ当り１日の発生量である。[Example 1] Various zinc alloys having the composition shown in Table 1 were produced as powders with a particle size of 48 to +50 mesh by ordinary spraying, and then these powders were heated in a heat treatment furnace under an H2 gas atmosphere for 35 minutes.
Heat-treated at 0°C for 2 hours, put a certain amount of the obtained heat-treated zinc alloy powder into a KOH solution, and added 0.04% by weight of mercury to form a powder (alloy powders with even numbers in the table)
and ice-free ones (alloy powders with the same odd numbers) were immersed in a 40% KOH solution at 45° C. saturated with zinc oxide, and the amount of hydrogen gas generated was measured and evaluated. The results are shown in Table 1. Hydrogen gas generation amount (JIIl/g.d
) is the amount generated per day per gram of alloy powder.
同様に第１表に示した各組成の末化した又はしない亜鉛
合金粉末を熱処理しないこと以外は、上述と同じ方法で
評価試験した結果を熱処理品の結果と対比して第１表に
示した。Similarly, Table 1 shows the results of evaluation tests performed in the same manner as above, except that the zinc alloy powders with or without powder of each composition shown in Table 1 were not heat-treated, and compared with the results of the heat-treated products. .
これらの結果から同じ組成の亜鉛合金粉末であっても熱
処理品は非熱処理品に比べ水素ガス発生量がほぼ半分位
に抑制されることが判明した。These results revealed that even with zinc alloy powder of the same composition, the amount of hydrogen gas generated in the heat-treated product was suppressed to approximately half that of the non-heat-treated product.
即ち、無氷化の亜鉛合金粉末であっても熱処理品（奇数
番号例）は、従来の非熱処理低末化亜鉛合金粉末とほぼ
同等の水素ガス発生量であり、従来の低水銀電池の代替
品として無水銀電池を製造、使用することが充分可能と
なったことが理角琴される。In other words, even with ice-free zinc alloy powder, heat-treated products (odd numbered examples) generate almost the same amount of hydrogen gas as conventional non-heat-treated, low-dust zinc alloy powder, making it an excellent alternative to conventional low-mercury batteries. It is clear that it has now become possible to manufacture and use mercury-free batteries as commercial products.
（以下余白）
［実施例２］
鉛０．０５％、マグネシウム０．００７％、残部が亜鉛
及び不可避的不純物からなる絹成の亜鉛合金粉末を供試
材として、表示の各条件下で熱処理した場合としない場
合について、水素ガス発生量を調べた結果を第２表に示
す。(Left below) [Example 2] Silky zinc alloy powder consisting of 0.05% lead, 0.007% magnesium, and the balance being zinc and unavoidable impurities was used as a test material and heat-treated under each of the indicated conditions. Table 2 shows the results of investigating the amount of hydrogen gas generated with and without.
第２表
第２表から、熱処理を行うためのガス雰囲気としてはＨ
２ガスの方がＮ２ガスより、水素ガス抑制効果を高める
目的上、若干優れていることが理解される。ただし、ど
んなガス雰囲気とすることが最も有利であるかは製造コ
ストに合わせて調整できることが理解される。Table 2 From Table 2, the gas atmosphere for heat treatment is H
It is understood that 2 gas is slightly better than N2 gas for the purpose of increasing the hydrogen gas suppression effect. However, it is understood that the most advantageous gas atmosphere can be adjusted depending on manufacturing costs.
［発明の効果］
本発明によれば、上述の如く、末化された又は末化され
ていない亜鉛合金粉末を簡易な手段で熱処理することの
みによって電池の負極材として使用したときなどの水素
ガス発生量を従来品に比し著しく減少させることができ
るばかりでなく、無末化の亜鉛合金粉末を用いた場合で
さえも、従来の低木化亜鉛合金粉末と同等程度に電池負
極材として使用したときなどの水素ガス発生量を抑制で
きるので無末化亜鉛合金粉末を用いた電池即ち無水銀電
池としても充分使用できる電池がつくれることになり、
公害面における利点ははかり知れない程大であるという
ことができる。[Effects of the Invention] According to the present invention, as described above, by simply heat-treating powdered or unpowdered zinc alloy powder, hydrogen gas can be produced when used as a battery negative electrode material. Not only can the amount generated be significantly reduced compared to conventional products, but even when unpowdered zinc alloy powder is used, it can be used as a battery negative electrode material to the same extent as conventional low-density zinc alloy powder. Since it is possible to suppress the amount of hydrogen gas generated when using powdered zinc alloy powder, it is possible to create a battery that uses unpowdered zinc alloy powder, that is, a battery that can also be used as a mercury-free battery.
The benefits in terms of pollution can be said to be immeasurably large.
（以下余白）(Margin below)
Claims (2)
、マグネシウム、カルシウム、ストロンチウム、錫、鉛
、ビスマス、カドミウム、銀及びテルルからなる群より
選ばれた少なくとも１種の金属を０．０００１〜０．５
重量％含み、残部が亜鉛及び不可避的不純物からなる熱
処理された亜鉛合金粉末であって、酸化亜鉛を飽和させ
た４５℃の４０％ＫＯＨ溶液中に浸漬させて測定した水
素ガス発生量が、熱処理されていないこと以外は同一の
亜鉛合金粉末を同一の溶液中に浸漬させて同一の条件で
測定した水素ガスの発生量に比し、少なくとも３０％少
ないことを特徴とするアルカリ電池用亜鉛合金粉末。(1) 0.0001 to 0.5 of at least one metal selected from the group consisting of aluminum, gallium, indium, thallium, magnesium, calcium, strontium, tin, lead, bismuth, cadmium, silver, and tellurium.
% by weight, the balance being zinc and unavoidable impurities, and the amount of hydrogen gas generated was measured by immersing the powder in a 40% KOH solution at 45°C saturated with zinc oxide. Zinc alloy powder for alkaline batteries, characterized in that the amount of hydrogen gas generated is at least 30% less than the amount of hydrogen gas generated when the same zinc alloy powder is immersed in the same solution and measured under the same conditions except that the zinc alloy powder is not .
、マグネシウム、カルシウム、ストロンチウム、錫、鉛
、ビスマス、カドミウム、銀及びテルルからなる群より
選ばれた少なくとも１種の金属を０．０００１〜０．５
重量％含み、残部が亜鉛及び不可避的不純物からなる亜
鉛合金をガス雰囲気中１００〜５００℃の温度下で熱処
理することによってガス発生量の少ない合金粉末とする
ことを特徴とするアルカリ電池用亜鉛合金粉末の製造方
法。(2) 0.0001 to 0.5 of at least one metal selected from the group consisting of aluminum, gallium, indium, thallium, magnesium, calcium, strontium, tin, lead, bismuth, cadmium, silver, and tellurium;
% by weight, the balance being zinc and unavoidable impurities, and heat treating the zinc alloy at a temperature of 100 to 500°C in a gas atmosphere to produce an alloy powder with a small amount of gas generation. Method of manufacturing powder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1193690A JP2932285B2 (en) | 1989-07-26 | 1989-07-26 | Method for producing zinc alloy powder for alkaline batteries with low gas generation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1193690A JP2932285B2 (en) | 1989-07-26 | 1989-07-26 | Method for producing zinc alloy powder for alkaline batteries with low gas generation |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP896599A Division JP3352965B2 (en) | 1999-01-18 | 1999-01-18 | Zinc alloy powder for alkaline batteries with low gas generation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0357160A true JPH0357160A (en) | 1991-03-12 |
| JP2932285B2 JP2932285B2 (en) | 1999-08-09 |
Family
ID=16312160
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1193690A Expired - Lifetime JP2932285B2 (en) | 1989-07-26 | 1989-07-26 | Method for producing zinc alloy powder for alkaline batteries with low gas generation |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2932285B2 (en) |
-
1989
- 1989-07-26 JP JP1193690A patent/JP2932285B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JP2932285B2 (en) | 1999-08-09 |
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