SU1604796A1 - Composition for making heat-resistant porcelain - Google Patents

Abstract

The invention relates to the manufacture of ceramic products, in particular, to the production of porcelain highly porous, permeable materials with a mesh-cellular structure. In order to increase the operational durability of porous products by increasing the mechanical strength of the material, the composition includes the following components, wt.%: Petalite 5-20

clay component 25-33

quartz sand 15-25

alkaline component from the group: feldspar, pegmatite 20-25

component from the group: talc, dolomite, limestone 2-6

china battle 5-13

polyvinyl alcohol 1-5. Physical and mechanical properties are as follows: apparent with a material density of 0.2-1.0 g / cm ³ , open porosity is 60-90%, average pore size of cells is 0.5-5.0 mm, compressive strength is 1.0 -5.0 MPa, loss of strength after 10 thermal cycles (900 ° С

120 ° C in air) 0-12%. 2 tab.

Description

The invention relates to the manufacture of ceramic products, in particular, to the loss of porcelain highly porous permeable materials with a mesh-cellular structure, and can be used in the manufacture of high-temperature filters, catalyst supports and flame arresters.

The purpose of the invention is to increase the operational durability of porous products by increasing the mechanical strength of the material,

Porcelain is made according to the following technology.

All emaciated components (petalite, quartz sand, alkali-containing component, a component from the group: talc, dolomite, limestone and porcelain battles) are ground by a wet method and mixed with plastic materials previously dissolved in water: polyvinyl alcohol and a clay component. As a result, a ceramic slip is obtained, having a residue on a 006 sieve of not more than 0.9-1.2 wt.%, A density of 1.5-2.0 g / cm, a viscosity of 4.5-5.5 m.kg-- with . Highly porous mesh-cellular ceramic products are obtained by applying

SP

four

WITH

about

obtained ceramic suspension on a highly porous polymer matrix, followed by drying the semi-finished product, burning the organic base and burning the material in air with

izso-iaso c.

.In tab. Table 1 lists the compositions for the manufacture of heat-resistant porcelain, and table. 2 - product properties.

Claims (1)

Formula izob. reteni Composition for the manufacture of heat-resistant porcelain, including petalite, clay component, quartz sand, alkali-containing component from the group: feldspar, pegmatite, comp by increasing the mechanical strength of the material, it additionally contains porcelain 6of and polyvinyl alcohol in the following ratio, wt.%: Petalite; 5-20 Clay component 25-33 Quartz sand 15-25 Silk-containing component from the group: feldspar, pegmatite 20-25 Component from the group: talc, dolomite, izvest Seeming with density blanks, g / cm3.25 + 0.02 0.25 + 0.02 0.025 ± 0.02 0.25 + 0.2 Cajumda with. density n-nmt VP m. , 40 + 0.05 0.42 + 0.05 0.41 + 0.05 0.41 + 0.05 Is open porosity % 82 + 282 + 2, 82 + 2 Strength under compression 0.25 ± 0.2 05 0.43 ± 0.05 82 + 2 82 ± 2 strength under compression. GB, MPa2.4 + 0.4, 2.0 + 0.4 2.6 + 0.42.3 + 0.4 2.1 + 0.4  after 10 thermal cycles .. (900 C,. 2Q ° C), MPa 2.1 + 0.4 2.0 + 0.4 2.5 + 0.2 2.2 + 0.4 2.1 + 0, 4 Loss of strength,% 12 + 2, 0 4 + 2 4.3 + 2 О 2 05 0.25 ± 0.2 05 0.43 ± 0.05 82 + 2 82 ± 2 Seeming with density blanks, g / cm Seemingly with density HPVM g / cm Is open porosity material% Strength under compression b c. MPa GB after 10 thermo- cycles ( 120 ° C), MPa Lost strength,% 0.25 + 0.2 0.25 + o, 2 0.25 iO, 2 0.25 ± 0.2 0.25 + 0.02 0.42 + 0.05 0.39 ± 0.05 0.41 + 0.05 0.40 + .b, 05 0.43 + 0.05 82 + 2 82 + 2 82 ± 2. 82 + 2 82 ± 2 2.7 + 0.3 2.0 + 0.4 1.9 + 0.4 2.3 + 0.4 0.7 + 0.4 2.8 + 0.4 1.8 + 0.4 1.9 + 0.4 2.1 + 0.4 0.7 + 0.4 C 10 + 2 O 8.8 + 2 O Continuation of table 2 82 ± 2. 82 + 2 82 ± 2