| abstract |
The present invention relates to a non-aqueous electrolyte comprising 79.8 to 92 mol% of ZrO 2 , 4.5 to 10.2 mol% of Y 2 O 3 and 3.5 to 7.5 mol% of Nb 2 O 5 or 79.8 to 88.5 mol% of ZrO 2 , 6.0 to 10.2 mol% of Y 2 O 3 and 5.5 to 10.0 mol% of Ta 2 O 5 and a TiO 2 nano powder added in an amount of more than 0 wt% to 2.5 wt% with respect to the weight of the composite powder A sintered body having a sintered density of 99% or more, an average particle diameter of the sintered body particles of 2 占 퐉 or more, a hardness of the sintered body of 4 to 10 GPa, a fracture toughness of the sintered body of 9 to 14 MPa 占 1/2 1/2 , And the strength of the sintered body is in the range of 400 to 1000 MPa. |