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1. (WO2017068137) BEAD MADE OF A FUSED PRODUCT

Pub. No.:    WO/2017/068137    International Application No.:    PCT/EP2016/075401
Publication Date: Fri Apr 28 01:59:59 CEST 2017 International Filing Date: Sat Oct 22 01:59:59 CEST 2016
IPC: B02C 17/20
Applicants: SAINT-GOBAIN CENTRE DE RECHERCHES ET D'ETUDES EUROPEEN
Inventors: NONNET, Emmanuel
BOUSSANT-ROUX, Yves
Title: BEAD MADE OF A FUSED PRODUCT
Abstract:
Bead having a sphericity greater than or equal 0.6 and made of a fused product having the following chemical composition, in percentages by weight on the basis of the oxides and for a total of 100% : 20% ≤ (ZrO2 + HfO2), with HfO2 ≤ 2%, 5% ≤ SiO2, 0% ≤ Al2O3 ≤ 20%, 8.5% ≤ MgO ≤ 20%, 0.5% ≤ TiO2 ≤ 20%, and oxides other than ZrO2, HfO2, SiO2, Al2O3, MgO and TiO2, or "other oxides": ≤ 5 % provided that the (ZrO2 + HfO2)/SiO2 weight ratio is greater than 1, and provided that Al2O3 + TiO2 ≤ 26% if MgO > 17%.