SU1113365A1 - Non-frit glaze - Google Patents

Abstract

NEFRITTING GLAZE, including SiO.,. Мр, 0, СаО, Na, jO, К20, o tl and h and y with the fact that, in order to increase thermal stability, degree of whiteness and decrease of the coefficient of thermal expansion, it additionally contains В2.0з, with the following ratio components, wt.%: SiOo66.3-73.5 9.3-14.7 A12.0z 5.3-8.4 MgO 5.8-7.9 CaO 0.4-2.5 NajO 1.1 -3.2 KgO 0.4-1.2 V 20, C

Description

with: oo S5

О51 1 IHofipoTt-Hiie belongs to the technol chiliclop, namely to the coatings and porcelain and semi-porcelain masses, and can be used in ceramic lameshpenosti. Known nephritis glaze 1 for porcelain products, the following composition, wt.%: SiOj65.61-69.15 AliO, 12.60-13.3, 28-0.33 MgO2.93-3.2 CaO3.97-4 , 38 ZnO0.25-0.49 ZrOj3.51-10.46 1.46-1.62 2.09-2.4 ,, 0.35-1.52 The disadvantage of this glaze is its multicomponent, deficient and expensive content. , cost of zirconium concentrate, dye oxide and toxic ZnO. The color of the gray-naked coating. The closest to the invention is the composition of the nephritic gloss L21 containing, in wt.%: SiOi58.26-58.89 AljOi10.47-12.19 CaO6.10-8.19 MgO4.92-6, 70, 3-2,56, 73-1,93 ZnO6,00-10,00 CuO3,00-6,00 ,, 0,35-0,41 The disadvantage of this glaze is the light green color, low thermo. resistance, the content of toxic expensive zinc oxide, many component. The purpose of the invention is to increase the thermal stability, the degree of whiteness and the decrease in the coefficient of thermal distribution. The goal is achieved by having a non-jade glaze. 52 including SiOj ,, MgO, CaO,, K, jO, additionally contains BjO sieves in the following ratio of components, wt.%: SiOj66.3-73.5 AljO, 9.3-14.7 MgO5.3-8, 4 CaO5.8-7.9, 4-2.5 KjO1.1-3.2 VgO; 0.4-1.2. The raw materials used are quartz sand, prosnovsky kaolin, pegmatite, skull watered, dolomite, alumina boric acid. In order to increase thermal stability and whiteness, reddish gnegel (SiOg) in the amount of 3-5% is additionally introduced into the fir. The use of silica gel as a raw material reduces the cost of the charge for glazes and solves the important national-farm problem of utilization of industrial waste. Raw materials are ground in a wet mill ball mill to a residue on a sieve 006 0.1-0.15%. The glaze suspension is applied to the porcelain base by the method of dipping and calcined in PAS ovens at 1300-1350 ° C. The resulting glaze coating is characterized by a smooth velvety surface, pure white color and heat resistance. In tab. 1 shows the composition of the glaze. The properties of the glaze are given in table. 2. The proposed composition of the glaze has a higher heat resistance, a high degree of whiteness and a lower thermal coefficient. The use of glaze will improve the quality of products by increasing the heat resistance and improving the decorative effect due to the velvety texture of the white coating. Table 1

9.3

73.5

i ,.

S3

5.8 Firing interval, С1300-13501300 Surface quality Good

Heat resistance, the number of tagshossmen19

78

Whiteness 7,

TCLE, - 10 degrees43, 6

table 2

Good

Good

10-12

nineteen

Light79 green

44.1

48.5-50.2

42.8 13501300-1350 1270-1300

Claims (1)

UNFRITTED GLAZE, including Si0 ₂ , A1 ₂ 0 ₃ . MgO, CaO, Na ₂ 0, K ₂ 0, are clearly distinguished by the fact that, in order to increase thermal stability, brightness and reduce the coefficient of thermal expansion, it additionally contains B ₂ 0 ₃ in the following ratio of components, wt.%: S i 0 ₂ 66.3-73.5 ai ₂ o ₃ 9.3-14.7 MgO 5.3-8.4 CaO 5.8-7.9 Na ₂ 0 0.4-2.5 to ₂ o 1.1-3.2 in ₂ of ₃ 0.4-1.2 1 ate Cz СО СО SL 1 1 1336 5