JP2014518192A - Pimによる着色セラミック部品の製造方法 - Google Patents
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Abstract
Description
第1に、霧化されるといわれる、噴霧乾燥から得られた粉末は、より安全な形で取り扱うことがより容易である利点を有する。この粉末はより揮発性が少ない。
− 無機粉末、有利にはセラミック、および色素を含む混合物を調製する工程と、
− この混合物を噴霧乾燥ステップにかけて、霧化した着色粉末を得る工程と、
− 前記霧化した着色粉末を予備焼結ステップにかける工程と、
− この予備焼結した着色粉末を有機バインダー、有利にはポリマー質と混合して、マスターバッチを得る工程と、
を含む方法に関する。
− LLDPE(線状低密度ポリエチレン)などの、良好な延性を有する安定なホモポリマーまたはコポリマー、
− パラフィンワックス(例えば、ポリエチレンワックス、PW)などの滑剤、および
− ポリエチレングリコール(PEG)などの可塑剤、
を、適正な質量比率で含む。
− 本発明の目的物を形成する方法により、マスターバッチを調製する工程と、
− このマスターバッチを型内に射出して、部品を成形する工程と、
− 部品を脱バインダーする工程と、
− 部品を焼結する工程と、
を含む方法も目標とする。
− 第1の供給原料(1)は、予備焼結を受けていない粉末から調製し、
− 第2の供給原料(2)は、600℃で予備焼結を受けている粉末から調製し、
− 第3の供給原料(3)は、900℃で予備焼結を受けている粉末から調製し、
− 第4の供給原料(4)は、1,100℃で予備焼結を受けている粉末から調製している。
噴霧乾燥は、周波数33Hzの超音波ノズルにより、240℃において流速500mL/時で実施している。
供給原料を調製するため、霧化粉末、できる限り予備焼結したものを、ミキサーまたは押出機内で、下記の比率による3種のポリマーの混合物と混合している。
− 53質量%までのLLDPE、
− 29質量%までのPEG20,000、
− 18質量%までのパラフィンワックス、より具体的にはポリエチレンワックス(PW)、すなわち、100質量%。
予備焼結されていない霧化粉末(1)のマスターバッチは、気泡が多く、射出するのが不可能である。
次いで、供給原料(2)、(3)および(4)は、下記の条件によりBattenfeldプレス中に射出して、部品に成形する。
− ホッパー温度:150℃、
− ノズル温度:170℃、
− 圧力:140バール。
脱バインダーした部品は、機械的抵抗性がなく、極めて容易に粉末形態に戻すことができ、また走査電子顕微鏡(SEM)で観察されている。
次いで、供給原料(2)、(3)および(4)から得られ、射出したグリーン部品を、1,300℃の温度で5時間焼結している。
実験的に、供給原料(2)、(3)および(4)の比較は、3質量%の酸化鉄によって着色した3%イットリア安定化ジルコニア(TZ3YS−E、Tosoh Corporation)の粉末の場合、最適な予備焼結温度は、600℃を超えることを示している。
Claims (11)
- 着色した部品を成形するためのマスターバッチの製造方法であって、
− 無機粉末、有利にはセラミック、および色素を含む混合物を調製する工程と、
− 前記混合物を噴霧乾燥ステップにかけて、霧化した粉末を得る工程と、
− 前記霧化した粉末を予備焼結するステップにかける工程と、
− 前記予備焼結した粉末を有機バインダー、有利にはポリマー質と混合して、前記マスターバッチを得る工程と、
を含むマスターバッチの製造方法。 - 前記セラミックの粉末が、例えば、イットリウムを有利にはドーピングした、ジルコニアであることを特徴とする請求項1に記載のマスターバッチの製造方法。
- 前記色素が、着色顔料、有利には金属酸化物、例えば酸化鉄、または金属前駆体であることを特徴とする請求項1または2に記載のマスターバッチの製造方法。
- 前記色素が、前記無機粉末の0.1〜15質量%の量となることを特徴とする請求項1から3のいずれか一項に記載のマスターバッチの製造方法。
- 前記噴霧乾燥ステップにかけられる前記混合物が、水溶液であることを特徴とする請求項1から4のいずれか一項に記載のマスターバッチの製造方法。
- 前記予備焼結するステップが、500℃から1,400℃の間、有利には700℃から1,200℃の間の範囲にある温度で行われることを特徴とする請求項2から5のいずれか一項に記載のマスターバッチの製造方法。
- 前記予備焼結するステップが、1から10時間の間、好ましくは2から6時間の間の範囲にある継続時間の間行われることを特徴とする請求項1から6のいずれか一項に記載のマスターバッチの製造方法。
- 前記有機バインダー、有利にはポリマー質が、良好な延性を有する安定なポリマー、滑剤、可塑剤およびできる限り界面活性剤を含むことを特徴とする請求項1から7のいずれか一項に記載のマスターバッチの製造方法。
- 前記予備焼結した粉末が、前記マスターバッチの40〜75体積%の量、好ましくは50から65体積%の間の量になることを特徴とする請求項1から8のいずれか一項に記載のマスターバッチの製造方法。
- 着色した成形部品の製造方法であって、
− 請求項1から9のいずれか一項に記載の方法によるマスターバッチを調製する工程と、
− 前記マスターバッチを型内に射出して、前記部品を成形する工程と、
− 前記部品を脱バインダーする工程と、
− 前記部品を焼結する工程と、
を含む製造方法。 - 前記焼結する工程が、1,250℃から1,400℃の間の範囲にある温度で行われることを特徴とする請求項10に記載の部品の製造方法。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
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FR1155915 | 2011-06-30 | ||
FR1155915A FR2977251B1 (fr) | 2011-06-30 | 2011-06-30 | Procede de fabrication de pieces colorees en ceramique par pim |
PCT/FR2012/051300 WO2013001201A1 (fr) | 2011-06-30 | 2012-06-11 | Procede de fabrication de pieces colorees en ceramique par pim |
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JP2014518192A true JP2014518192A (ja) | 2014-07-28 |
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JP2014517879A Pending JP2014518192A (ja) | 2011-06-30 | 2012-06-11 | Pimによる着色セラミック部品の製造方法 |
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US (1) | US20140077403A1 (ja) |
EP (1) | EP2726262B1 (ja) |
JP (1) | JP2014518192A (ja) |
FR (1) | FR2977251B1 (ja) |
WO (1) | WO2013001201A1 (ja) |
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EP2873476A1 (en) | 2013-11-13 | 2015-05-20 | Linde Aktiengesellschaft | A method of dyeing metallic and/or ceramic objects in the course of a powder injection moulding process |
US20160039004A1 (en) * | 2014-08-07 | 2016-02-11 | Nano And Advanced Materials Institute Limited | Feedstock Formulation and Supercritical Debinding Process for Micro-Powder Injection Moulding |
FR3062323B1 (fr) * | 2017-01-30 | 2020-10-23 | Safran | Procede de fabrication d'un noyau ceramique |
FR3067270B1 (fr) * | 2017-06-13 | 2021-12-24 | Safran | Procede de realisation d'une piece metallique par deliantage et frittage |
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EP2726262A1 (fr) | 2014-05-07 |
WO2013001201A1 (fr) | 2013-01-03 |
FR2977251A1 (fr) | 2013-01-04 |
EP2726262B1 (fr) | 2018-09-19 |
US20140077403A1 (en) | 2014-03-20 |
FR2977251B1 (fr) | 2013-06-28 |
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