Preparation of High Density BaZr_(0.97)Y_(0.03)O_(3-d)Ceramic and its Interaction with Titanium Melt

摘要

In this paper, the BaZrO_3(BZ) and BaZr_(0.97)Y_(0.03)O_(3-d)(BZY3) powders were prepared by using the industrial grade BaCO_3, ZrO_2 and Y_2O_3 powders combining the conventional solid state reaction. The BaZrO_3(BZ) and BaZr_(0.97)Y_(0.03)O_(3-d) (BZY3) ceramics were fabricated at 1750癈. The effect of ball milling time and sintering aid (TiO_2) on the sinterability of BaZr_(0.97)Y_(0.03)O_(3-d) (BZY3) ceramics were investigated, and the improved stability of BaZrOsrefractory with Y_2O_3 additive were studied according to the refractory-metal interaction. The results revealed that the particle size of BZY3 powders decreased first and then increased with the increasing of ball milling time from 6h to 12h, and the minimum particle size was only 2.252祄 at 8h. When 2wt.%Ti02 was added, the sintered pellet of BZY3was the most densest and the relative density was above 95%. After melting the Ti_2Ni alloy on the BZY and BZ ceramics, the thickness erosion layer of BaZrO_3 and BZY_3 refractories and Ti_2Ni alloy is approximately 50祄 and 20祄 respectively, showing that BZY3 was more stable than BaZrO_3 refractory.