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    Wyświetlanie 1-5 z 5
    Tytuł:
    Gas Evolution Quantitative Analysis at a Temperature of 900°C of a Cellulose Mixture Modified by Mineral Additives
    Autorzy:
    Zawieja, Z.
    Sawicki, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/958210.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    gas evolution
    modified cellulose mixture
    Opis:
    This article presents a gas evolution study of a novel, cellulose-based mixture with such mineral additives as expanded perlite, expanded vermiculite and microspheres. Inorganic alumina-silica binder was used to produce an uniform, bound mixture. The results have shown that the novel, cellulose-based mixture, obtained from waste paper, with mineral additives, emits smaller amounts of gas, while retaining the same thermal resistance.
    Źródło:
    Archives of Metallurgy and Materials; 2016, 61, 2B; 1051-1055
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Qualitative Analyses of Gas Evolution from Modified Cellulose Mixtures During Thermal Degradation in Air and Argon
    Autorzy:
    Zawieja, Z.
    Sawicki, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/102348.pdf
    Data publikacji:
    2017
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    expanded perlite
    expanded vermiculite
    microspheres
    cellulose mixture
    mass spectrometry
    Opis:
    This paper presents the application of mineral additives, such as expanded perlite, expanded vermiculite and microspheres in items used in founding. Mixed with paper pulp and aluminosilicate resin as a binder, these additives are the base of a mixture patented by the authors, which can be used in the production of pipe shapes and connectors with a circular cross-section in casting systems in the founding industry. These mixtures were subjected to TG thermal degradation during which a quantitative analysis of the emitted fumes was carried out. The analysis did not detect any other compounds than those formed by the combustion of cellulose materials, which indicated that no chemical reaction took place between the applied additives and cellulose at high temperatures.
    Źródło:
    Advances in Science and Technology. Research Journal; 2017, 11, 3; 24-30
    2299-8624
    Pojawia się w:
    Advances in Science and Technology. Research Journal
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Thermogravimetric analysis of modified cellulose mixtures in air
    Autorzy:
    Zawieja, Z.
    Sawicki, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/352521.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    expanded vermiculite
    expanded perlite
    modified cellulose mixture
    TG/DTG analysis
    Opis:
    The paper includes the TG-DTG thermogravimetric air-testing of a cellulose mixture modified with the additives of expanded vermiculite or expanded perlite. A thermal degradation test was carried out at 1000°C with a simultaneous qualitative analysis of the emitted gases. During the thermal degradation process, the thermal effects were also measured. The research results indicate that expanded vermiculite or expanded perlite do not emit toxic gases during thermal degradation. The cellulose mixture modification, with the additives of expanded vermiculite or perlite, does not result in the creation of new gaseous compounds in the process of thermal degradation. As investigated below, the mixtures tested in this article find application in gating systems for supplying liquid metal in no-bake moulds. Such cellulose-based material solutions shall allow the foundry industry to introduce less gas vaporising technologies within the entire casting production process.
    Źródło:
    Archives of Metallurgy and Materials; 2019, 64, 1; 153-157
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Gas Emissivity of a Modified Cellulose Mix at the Temperature of 900°C
    Autorzy:
    Zawieja, Z.
    Sawicki, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/380499.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    cellulose mix
    gas emissivity
    gating system
    mieszanka celulozowa
    emisyjność gazowa
    układ wlewowy
    Opis:
    This paper presents the findings of a study of gas emissivity and the volumetric gas flow rate from a patented modified cellulose mix used in production of disposable sand casting moulds. The modified cellulose mix with such additives as expanded perlite, expanded vermiculite and microspheres was used as the study material. The results for gas emissivity and the gas flow rate for the modified cellulose mix were compared with the gas emissivity of the commercial material used in gating systems in disposable sand casting moulds. The results have shown that the modified cellulose mix is characterized by a lower gas emissivity by as much as 50% and lower gas flow rate per unit mass during the process of thermal degradation at the temperature of 900°C, compared to the commercial mix. It was also noted that the amount of microspheres considerably affected the amount of gas produced.
    Źródło:
    Archives of Foundry Engineering; 2015, 15, 3; 91-94
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Investigation of an Advanced Cellulose Profile Used for the Manufacture of Gating Systems
    Autorzy:
    Zawieja, Z.
    Sawicki, J.
    Gumienny, G.
    Sobczyk-Guzenda, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/380939.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    innovative casting technologies
    innovative casting materials
    cellulose profiles
    gating system
    aluminium silicates
    gray cast iron
    ausferrite
    innowacyjne technologie odlewnicze
    innowacyjne materiały odlewnicze
    glinokrzemiany
    żeliwo szare
    Opis:
    The here in paper contains the results of investigations on a new type of cellulose blend used for the manufacture of profiles applied in the process of making gating systems in the foundry industry. A standard cellulose profile was subjected to an experiment. During the experiment the profile was filled with a liquid cast iron and at the same time the temperatures of the liquid metal crystallizing inside the profile were measured as well as the temperature of the outer layer of the profile was controlled. Further, the microstructure of the cast iron, which crystallized out inside the cellulose profile, was analysed and the cellulose, thermally degraded after the experiment, was verified with the use of the chemical analysis method. Moreover, a quality analysis of the original as well as the degraded cellulose profile was run with the use of the FTIR infrared spectroscopy. The presented results revealed that the cellulose blend is aluminium silicate enriched and contains organic binder additives. The cast iron, which crystallized out, tended to have an equilibrium pearlitic structure with the release of graphite and carbides. The generation of disequilibrium ausferrite phases was also observed in the structure.
    Źródło:
    Archives of Foundry Engineering; 2014, 14, 3; 123-128
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-5 z 5

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