The invention relates to a production method for high-purity fused yttria sand, using of high-purity Y2O3
raw material with Y2O3 content no less than 99.99%as melting material. The
raw material goes through the high-temperature
electric arc melting no less than 2400 DEG C; the control
electrode does not contact the liquid level and is no more than 2cm above the liquid level; after the high-temperature
electric arc melting, the
raw material forms low-carbon white transparent
crystal-like
frit which forms sand of particle size after being broken up. The invention adopts the electric melting method to make the
white powder yttria into
crystal-like product. And the method has the advantages that a long
electric arc operation avoids the contact of the
electrode and yttria and the introduction of carbon; the produced yttria has high purity with Y2O3content no less than 99.8%, low blowhole rate, high
volume density, high temperature strength and higher degree of wear-resistance and good volume stability; the method beneficial to obtain non-polluted
titanium pieces can be applied in the
casting of
titanium alloy and reducesthe production cost of the
titanium casting, laying the foundation for the promotion of the development of the titanium
casting industry; also, the method can produce yttria product with high purityto meet various application purposes.