Effect of acoustic-hydrodynamic treatment on the properties of the thermoplastic slips and the products obtained from a steatite sitall

• Published in: Glass and ceramics 1990-09, Vol.47 (9-10), p.352-354
• Main Authors: ROMANOVA, N. I, DYAGILEVA, L. A, BELYAVSKAYA, O. A, ROMANOV, B. P
• Format: Article
• Language: English
• Subjects: Applied sciences; Building materials. Ceramics. Glasses; Ceramic industries; Chemical industry and chemicals; Electrotechnical and electronic ceramics; Exact sciences and technology; Technical ceramics
• ISSN: 0361-7610; 1573-8515
• DOI: 10.1007/BF00678234

Hot casting pressure is the most critical operation when producing miniature and thin-walled products from steatite sitalls. The thermoplastic slip being used must have a low viscosity and high castability, and the grain size distribution must ensure a high packing factor. One way to control the slip properties is to treat it in a rotary type acoustic homogeniser, in which the slip is subjected to mechanical, acoustic and hydrodynamic effects. The effect of acoustic-hydrodynamic treatment on the properties of slips prepared using a glass powder with a specific surface of 0.7 m2/g was studied. The rheological properties (viscosity and shear stress) of slips prepared by different methods, and the flexural strength of semi-finished products was determined. Treatment in an acoustic GART-M apparatus decreased the viscosity of the slips and improved their resistance to layering. The casting properties of these slips are superior to propellor-stirred ones. There was an insignificant amount of pores in the product, and the strength was improved. Acoustic-hydrodynamic treatment was developed for producing miniature thin-walled components. 2 refs.