Nanocrystalline A4B2O9 type tantalate ceramic prepared through ultralow-temperature sintering and method thereof

• Main Authors: LUO KEREN, LI BAIHUI, WANG JIANKUN, ZHANG LUYANG, FENG JING, ZHANG HEYING, CHEN LIN
• Format: Patent
• Language: Chinese; English
• Published: 18.06.2021
• 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

The invention belongs to the technical field of thermal barrier coating materials, and discloses nanocrystalline A4B2O9 type tantalate ceramic prepared through ultralow-temperature sintering and a method thereof. The structural formula of the ceramic is A4B2O9, wherein A is one or more of Ni, Co, Mg, Ca, Sr, Ba or Zn, and B is Ta. The preparation method of the ceramic comprises the following steps: respectively carrying out heat preservation on A(OH)2, ACO3 and tantalum oxalate at 350-900 DEG C for 1-2 hours for thermal decomposition to obtain AO and Ta2O5 powder with high reaction activity; grinding the AO powder and the Ta2O5 powder to obtain a nanoscale powder mixture with high reaction activity; and finally, carrying out spark plasma sintering on the powder mixture with high reaction activity to prepare the blocky A4B2O9 type tantalate ceramic. The invention solves the problem of high cost of the existing thermal barrier coating and environmental barrier coating material. 本发明属于热障涂层材料技术领域，公开了一种超低温烧结制备纳米晶A4