Effect of water glass modification on its viscosity and wettability of quartz grains

• Autorzy: Kmita A. , Hutera B.
• Języki publikacji: EN

Abstrakty

EN

The aim of the present study was to develop a modifier for water glass. The method of thermal generation of metal oxide nanoparticles was adapted and used in the research. Nanoparticles of ZnO from the thermal decomposition of basic zinc carbonate were used. A method for the modifier introduction was developed, and the effect of modifier content and organic solvent type on the physico-chemical properties of binder (viscosity) and quartz wettability was determined. Binder viscosity was examined from the flow curves plotted with the help of a RHEOTEST 2 rotational rheometer equipped with proper software. Quartz wettability was determined examining time-related changes in the value of the contact angle in a quartz-binder system, until full stabilisation of the angle value has been achieved. Binder modification was carried out on sodium water glass designated as R"145". The water glass modifiers were suspensions of ZnO nanoparticles in propanol and methanol at a fixed concentration of c = 0.3 M and with the size of nanoparticles comprised in a range of <61 - 981 nm>. Water glass modification with the suspensions of ZnO nanoparticles in methanol and propanol showed the effect of modifier on the water glass viscosity and quartz wettability. This effect depends on the type of alcohol used. The ZnO suspension in propanol (alcohol with a longer hydrocarbon chain) affects more strongly the viscosity of binder and quartz wettability than the methanol suspension.

Słowa kluczowe

EN

water glass; modification; thermal synthesis; ZnO nanoparticles; viscosity; wettability

PL

szkło wodne; synteza termiczna; nanocząstka ZnO; lepkość; zwilżalność

• Wydawca: Komisja Odlewnictwa Polskiej Akademii Nauk Oddział w Katowicach
• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2012
• Tom: Vol. 12, iss. 3
• Strony: 59--62
• Opis fizyczny: Bibliogr. 16 poz., wykr.

Twórcy

autor

Kmita A.

autor

Hutera B.

• AGH University of Science and Technology, Faculty of Foundry Engineering, Cracow, Poland,

Bibliografia

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