Open AccessTechnology of slip casting of celsian-slavsonite ceramics
Author(s) -
Г. В. Лисачук,
Ya. М. Pitak,
R. V. Krivobok,
E. V. Chefranov,
V. V. Voloshchuk,
М. S. Maystat,
L. S. Limarenko
Publication year - 2020
Publication title -
naukovì doslìdžennâ z vognetrivìv ta tehnìčnoï keramìki. zbìrnik naukovih pracʹ
Language(s) - English
Resource type - Journals
ISSN - 2663-3566
DOI - 10.35857/2663-3566.120.15
Subject(s) - muffle furnace , materials science , ceramic , slip (aerodynamics) , flexural strength , porosity , metallurgy , mold , composite material , raw material , absorption of water , sintering , calcination , biochemistry , chemistry , physics , organic chemistry , thermodynamics , catalysis
The article considers the slip casting technology of celsian-slavsonite ceramics with the ratio of raw materials to obtain crystalline phases of ВаAl2Si2O8: SrAl2Si2O8 – 25:75.
The manufacture technology of product proceeded in two stages. The first stage of synthesis was performed in a muffle furnace at a rate of temperature of 15 deg / min at a maximum firing temperature of 1200 °C with a holding time of 2 hours. Then the synthesized ceramics were grinded for 10 minutes. The second stage was to obtain a slip with the addition of surfactants (DOLAPIX PC 67). The finished slip was poured into a plaster mold. Drying of the green sample was carried out in an oven at a temperature up to 110 °C for 3 hours. Firing of the dried sample was carried out in a muffle furnace at a rate of set temperature of 15 deg / min, at a maximum firing temperature of 1250 °C for 2 hours. The fired materials were subjected to machining.
The obtained data indicate that, the best sample was fired at a temperature of 1250 ° C and had the following properties: dielectric constant — 9.4, water absorption — 5.9 %, open porosity — 14.4 %, apparent density — 2.42 g/cm3, flexural strength — 19 MPa.