SU1057448A1 - Low-melting enamel frit - Google Patents

Abstract

LEGKSHLAVSKAYA EMAEL FRITTA, includes P 0 0c, PHO, CdO, ZnO, BjO, AlyO-j, flOj, Kjp, characterized in that, in order to improve the acid resistance and temperature of the onset of the thallium crystal / she additionally. keeps SnO, ZrOj СеО2 in the following ratio of components, wt.%: PjOy 44.50 PHO 5-10; CdO 5-10; ZnO 12-16; Vlo. 6-10; AlflO 1-3J TIOjZ O. KgO 8-10; SnOf 0.1-, ZrOj 0.1-3; CeOjO, 1-1.

Description

SL

one

iti

CX) The invention relates to low-melting enamel and can be used to prepare ceramic paints for decorating glass and Kevamika products. Known enamel, containing, wt.% P Oy 0-60, PbO j-IS; Na, jO 2-5 $ O.l-i; 0.3-2, SfO 0.5-7, at least one oxide from the group BaO, SrO 10-30; 5 h; snot 3-20 i. The disadvantage of this composition is low chemical resistance. Closest to the offer is a low-melting enamel frit that contains, in May.%: A5-50 PHO 5-10; CdO 5-to; ZnO 10-15; t-lli 1-2 TtOj 1-3} 0,5-A, 0, Li f 3-10. This frit is designed to produce decorative coatings on glass 2. However, coatings based on the known frit, due to the proximity of the lower limit of the crystallinity of the frit and the firing temperature of the coating, form a matte surface and have poor decorative properties. In addition, the coatings do not uphold modern requirements for decorative paints with regard to their resistance to acetic acid during ovidification within 24 hours. The purpose of the invention is to increase the acid resistance and the temperature of the onset of crystallization. The goal is achieved by the fact that the low-melting enamel Frit, in the locus lOf, PbO, CdO, ZnO,, A Ij0, TIOj, KgO, additionally contains SnOj, ZrOj, CeOjj at the following ratio of components, Mac.% J 5-10, CdO 5 10 ,, ZnO 12-16, BjOi 6-10, RltfO. 1-3, TJO-2 0.5-t, KjO, SnOj 0.1-4, ZrO, 2 0.1-3, CeO 0.1-1. Below are the compositions containing, in wt.%: I II III The properties of predlagae in JX compositions are given in the table.

Weight loss pokralti when processed in 3% acetic acid for 24 h,%

2.54

Bottom line; eats crystallization temperature, s 680

Dilation temperature softening point, s

490

Temperature coefficient of linear expansion. The mixture for cooking enamel-contains. chemical reagents brands h, and hch. Enamel cooking is carried out in quartz crucibles placed in electric

2; 35

8.38 bb 675

505 485 chamber furnace, at 1050 1100 C, or in electric heating furnaces of indirect yagreva. The welded enamel is granulated in water,

3 10574484

wet milled together to provide quality improvement with a pigment to the required fineness, decorative coatings after firing

they are dried, crushed, and used on products in temperature inut in the form of paint for decorating an SSO-eSO C. Interval. Uluayeni kani is one way or another of the quality of the coating is the result of glass and low-temperature crystallization.

ceramics-. Fixing paints on the firing temperature in the product range

the product is made by burning a decorative

products in muffle furnaces pripokrytiy. :

550-65 ° C. The use of the proposed higher values of the lower and lower cost of decorative outside the temperature of the crystallization of the covers on glass and ceramics.

, 10 tava will reduce toxicity

Claims (1)

A light-melting enamel frit, including PjOg, PbO, CdO, ZnO, BjO ^, A 0 ₅ , T10 ₂ , K ^ O, is distinguished by the fact that, in order to increase the acid resistance and the temperature of the onset of crystallization, it additionally keeps Sn0 ₂ , ZrOg, Ce 0 ^ in the following ratio of components, wt.%: P ₂ 0y 44.50) PbO 5-10} CdO 5-U; ZnO 12-16; B ₂ 0 <6-· ·, A1 <0 ₃ 1-s; bye *? o, 5 - * »· to _in about the 8th; sno ₂ 0.1-4; Zr0 ₂ 0.1-3; Ce0 ₂ 0.1-1.