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ZrO2-Al2O3-BASED CERAMIC SINTERED BODY AND MANUFACTURING METHOD THEREFOR
PROBLEM TO BE SOLVED: To provide a manufacturing method of a high strength strong toughness ZrO-AlO-based ceramic.SOLUTION: A ZrO-AlO-based ceramic containing tetragonal ZrOparticle having crystalline diameter of 5 to 20 nm as a main component, having crystalline diameter of α-AlOof 75 nm or less and relative density of 99% or more can be manufactured by preparing YOpartially stabilized ZrO-AlO-based powder body having molar ratio of zirconia (ZrO) and yttria (YO) of 96.5:3.5 to 97.5:2.5 and mass ratio as ZrOand alumina (AlO) added to YOof 85:15 to 75:25, molding the powder body by cold isostatic press to obtain a molded body and then sintering the molded body to high density by micro wave sintering under inert gas atmosphere at 1200 to 1400°C for 45 to 90 min. When microwave sintering is conducted, preferably temperature rise rate by 600°C is 5 to 20°C/min. and temperature rise rate at 600°C or higher is 50 to 150°C/min.SELECTED DRAWING: None
【課題】高強度・強靱性ZrO2-Al2O3系セラミックスの作製法を提供する。【解決手段】ジルコニア(ZrO2)及びイットリア(Y2O3)としてのモル比率が96.5:3.5〜97.5:2.5で、しかも、Y2O3添加したZrO2及びアルミナ(Al2O3)としての質量比率が85:15〜75:25であるY2O3部分安定化ZrO2-Al2O3系粉体を準備し、この粉体を冷間静水圧プレスにて成形して成形体を得、次いで、当該成形体を不活性ガス雰囲気下、1200〜1400℃で45〜90minマイクロ波焼結で高密度に焼結することによって、結晶子径5〜20 nmの正方晶ZrO2粒子を主成分として含み、α-Al2O3の結晶子径が75nm以下であり、99%以上の相対密度を有するZrO2-Al2O3系セラミックスが作製できる。マイクロ波焼結を行う際には、600℃までは昇温速度5〜20℃／minとし、600℃以上では昇温速度50〜150℃／minとすることが好ましい。【選択図】なし
ZrO2-Al2O3-BASED CERAMIC SINTERED BODY AND MANUFACTURING METHOD THEREFOR
PROBLEM TO BE SOLVED: To provide a manufacturing method of a high strength strong toughness ZrO-AlO-based ceramic.SOLUTION: A ZrO-AlO-based ceramic containing tetragonal ZrOparticle having crystalline diameter of 5 to 20 nm as a main component, having crystalline diameter of α-AlOof 75 nm or less and relative density of 99% or more can be manufactured by preparing YOpartially stabilized ZrO-AlO-based powder body having molar ratio of zirconia (ZrO) and yttria (YO) of 96.5:3.5 to 97.5:2.5 and mass ratio as ZrOand alumina (AlO) added to YOof 85:15 to 75:25, molding the powder body by cold isostatic press to obtain a molded body and then sintering the molded body to high density by micro wave sintering under inert gas atmosphere at 1200 to 1400°C for 45 to 90 min. When microwave sintering is conducted, preferably temperature rise rate by 600°C is 5 to 20°C/min. and temperature rise rate at 600°C or higher is 50 to 150°C/min.SELECTED DRAWING: None
【課題】高強度・強靱性ZrO2-Al2O3系セラミックスの作製法を提供する。【解決手段】ジルコニア(ZrO2)及びイットリア(Y2O3)としてのモル比率が96.5:3.5〜97.5:2.5で、しかも、Y2O3添加したZrO2及びアルミナ(Al2O3)としての質量比率が85:15〜75:25であるY2O3部分安定化ZrO2-Al2O3系粉体を準備し、この粉体を冷間静水圧プレスにて成形して成形体を得、次いで、当該成形体を不活性ガス雰囲気下、1200〜1400℃で45〜90minマイクロ波焼結で高密度に焼結することによって、結晶子径5〜20 nmの正方晶ZrO2粒子を主成分として含み、α-Al2O3の結晶子径が75nm以下であり、99%以上の相対密度を有するZrO2-Al2O3系セラミックスが作製できる。マイクロ波焼結を行う際には、600℃までは昇温速度5〜20℃／minとし、600℃以上では昇温速度50〜150℃／minとすることが好ましい。【選択図】なし
ZrO2-Al2O3-BASED CERAMIC SINTERED BODY AND MANUFACTURING METHOD THEREFOR
ＺｒＯ２−Ａｌ２Ｏ３系セラミックス焼結体及びその作製法
HIROTA TAKESHI (author) / GE XIAOTENG (author) / KIMURA HIDEO (author)
2017-12-28
Patent
Electronic Resource
Japanese
IPC:
C04B
Kalk
,
LIME
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