MANUFACTURING METHOD OF COMPOSITE OXIDE POWDER FOR SINTERING AND MANUFACTURING METHOD OF TRANSPARENT CERAMIC

• Main Authors: TANAKA KEITA, IKARI MASANORI
• Format: Patent
• Language: English; Japanese
• Published: 28.11.2019
• Subjects: ARTIFICIAL STONE; CEMENTS; CERAMICS; CHEMISTRY; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS; CONCRETE; LIME, MAGNESIA; METALLURGY; REFRACTORIES; SLAG; TREATMENT OF NATURAL STONE

To provide a manufacturing method of composite oxide powder for sintering, which synthesizes a garnet type rare-earth composite oxide powder in which four constituent elements consisting of: Tb; at least one rare-earth element selected from the group of Y and lanthanoid rare earths (excluding Tb); Al; and Sc, are all uniformly distributed.SOLUTION: A manufacturing method of composite oxide powder for sintering includes: adding an aqueous solution containing (a) a Tb ion, (b) at least one rare-earth ion selected from the group of a Y ion and lanthanoid rare-earth ions (excluding a Tb ion), (c) an Al ion, and (d) an Sc ion to an aqueous solution for coprecipitation; agitating it in the solution temperature of 50°C or less to make the above (a), (b), (c) and (d) components coprecipitate; and firing the same coprecipitate in the temperature of 1000°C or more and 1300°C or less after filtering, heating and dehydrating it to obtain a powder for sintering composed of a garnet type composite oxide.SELECTED DRAWING: Figure 1 【課題】 Ｔｂ、Ｙ及びランタノイド希土類（Ｔｂを除く）の群から選ばれる少なくとも１種のその他の希土類元素、Ａｌ及びＳｃの４種類の構成元素がすべて均一に分布したガーネット型希土類複合酸化物粉末を合成する焼結用複合酸化物粉末の製造方法を提供する。【解決手段】 （ａ）Ｔｂイオン、（ｂ）Ｙイオン及びランタノイド希土類イオン（Ｔｂイオンを除く）の群から選ばれる少なくとも１種のその他の希土類イオン、（ｃ）Ａｌイオン及び（ｄ）Ｓｃイオンを含む水溶液を共沈用水溶液に添加し液温５０℃以下で撹拌して、上記（ａ）、（ｂ）、（ｃ）及び（ｄ）成分を共沈させた状態とし、その共沈物をろ別、加熱脱水した後、１０００℃以上１３００℃以下で焼成してガーネット型複合酸化物からなる焼結用粉末を得る。【選択図】 図１