Glass composition
AssigneeJohnson Matthey Public Limited Company
InventorGerd Becker
Life of this patent
Estimating the term…
Abstract
A glass flux composition consisting essentially by weight of 30-70% SiO.sub.2, 10-30% CaO, 0-20% ZnO, 3-8% MoO.sub.3, 0-20% B.sub.2 O.sub.3, 0-25% Al.sub.2 O.sub.3, 0-10% K.sub.2 O, 0-10% Na.sub.2 O, 0-10% MgO, 0-15% BaO, 0-7% Li.sub.2 O, 0-10% PbO, 014 5% SrO, 0-10% CeO, 0-0.1% CoO and 0-5% P.sub.2 O.sub.5 is a useful opacifying composition for preparing a glaze composition for ceramics.
Claims11
A glass flux composition consisting essentially by weight of 30-70% SiO.sub.2, 10-30% CaO, 0-20% ZnO, 3-8% MoO.sub.3, 0-20% B.sub.2 O.sub.3, 0-25% Al.sub.2 O.sub.3, 0-10% K.sub.2 O, 0-10% Na.sub.2 O, 0-10% MgO, 0-15% BaO, 0-7% Li.sub.2 O, 0-10% PbO, 0-5% SrO, 0-10% CeO, 0-0.1% CoO and 0-5% P.sub.2 O.sub.5.
A glaze composition for ceramics, which composition consists essentially of:
- (A) 70-96% by weight of glass flux composition comprising a component consisting essentially of, by weight, 30-70% SiO.sub.2, 10-30% CaO, 0-20% ZnO, 3-8% MoO.sub.3, 0-20% B.sub.2 O.sub.3, 0-25% Al.sub.2 O.sub.3, 0-10% K.sub.2 O, 0-10% Na.sub.2 O, 0-10% MgO, 0-15% BaO, 0-7% Li.sub.2 O, 0-10% PbO, 0-5% SrO, 0-10% CeO, 0-0.1% CoO and 0-5% P.sub.2 O.sub.5 ;
- (B) 4-30% by weight of refractory material;
- and
- (C) 0-25% by weight of pigment.
A ceramic article bearing on its surface a glaze composition which has been fired thereon, the glaze composition consisting essentially of:
- (A) 70-96% by weight of glass flux composition comprising a component consisting essentially of, by weight, 30-70% SiO.sub.2, 10-30% CaO, 0-20% ZnO, 3-8% MoO.sub.3, 0-20% B.sub.2 O.sub.3, 0-25% Al.sub.2 O.sub.3, 0-10% K.sub.2 O, 0-10% Na.sub.2 O, 0-10% MgO, 0-15% BaO, 0-7% Li.sub.2 O, 0-10% PbO, 0-5% SrO, 0-10% CeO, 0-0.1% CoO and 0-5% P.sub.2 O.sub.5 ;
- (B) 4-30% by weight of refractory material;
- and
- (C) 0-25% by weight of pigment.
A ceramic article bearing on its surface a glaze composition which has been fired thereon, the glaze composition consisting essentially of:
- (A) 70-96% by weight of glass flux composition consisting essentially of, by weight, 30-70% SiO.sub.2, 10-30% CaO, 0-20% ZnO, 3-8% MoO.sub.3, 0-20% B.sub.2 O.sub.3, 0-25% Al.sub.2 O.sub.3, 0-10% K.sub.2 O, 0-10% Na.sub.2 O, 0-10% MgO, 0-15% BaO, 0-7% Li.sub.2 O, 0-10% PbO, 0-5% SrO, 0-10% CeO, 0-0.1% CoO and 0-5% P.sub.2 O.sub.5 ;
- (B) 4-30% by weight of refractory material;
- and
- (C) 0-25% by weight of pigment.
A method of decorating a ceramic body, which method comprises applying to the ceramic body a glaze composition which consists essentially of:
- (A) 70-96% by weight of glass flux composition consisting essentially of, by weight, 30-70% SiO.sub.2, 10-30% CaO, 0-20% ZnO, 3-8% MoO.sub.3, 0-20% B.sub.2 O.sub.3, 0-25% Al.sub.2 O.sub.3, 0-10% K.sub.2 O, 0-10% Na.sub.2 O, 0-10% MgO, 0-15% BaO, 0-7% Li.sub.2 O, 0-10% PbO, 0-5% SrO, 0-10% CeO, 0-0.1% CoO and 0-5% P.sub.2 O.sub.5 ;
- (B) 4-30% by weight of refractory material;
- and
- (C) 0-25% by weight of pigment;
- and then firing the composition.
Dependencies are inferred from the claim text.