Thermal stability of expanded perlite modified by mullite

Pichór, Waldemar; Janiec, Agnieszka

doi:10.1016/j.ceramint.2007.10.008

Cited by 37 publications

(16 citation statements)

References 10 publications

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“…The current knowledge of the expanded vermiculite [17][18][19][20][21], expanded perlite [22,23], and microspheres [24,25] proves their higher thermal resistance when compared to the cellulose based unmodified materials [11,12]. The exothermic effect for the commercial cellulose sample and the experimental #1 one is connected with the occurrence of microspheres which, to a certain temperature level, behave as an admixture improving the insulation ability of the mixture, whereas after exceeding the limit temperature they trigger exothermal effects [12,15,16].…”

Section: Discussionmentioning

confidence: 99%

Expanded Perlite, Expanded Vermiculite and Microspheres as Fillers in New Generation Paper Pulp Mixtures Used for Contact With Liquid Metal

Zawieja¹,

Sawicki²

2015

Adv. Sci. Technol. Res. J.

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Liquid metal when filling sand casting mould while pouring it out from ladle at the first moment comes across the sprue/gate system of the mould the purpose of which is to transfer liquid metal and feed the mould recess. The materials presently used for the elements of the sprue/gate systems are based on ceramics or the mixtures based on paper pulp. In this study the use of alternative mineral additions such as expanded perlite, expanded vermiculite, and microspheres as the fillers to paper pulp acquired from waste-paper for the use for the elements of mould sprue/gate systems or also other applications for the contact with liquid metal are presented. Experimental mould tube shapes made on the basis of the paper pulp based mixture patented by the authors were poured over with liquid metal. For the comparison, ceramic shapes and commercially available cellulose shapes were investigated in the same way. In order to compare the crystallization processes, a measurement of the cooling off liquid metal was carried out for all the analysed tube samples. From the so obtained metal samples metallographic microsections were made to compare cast iron microstructures. The results obtained from the investigations carried out have shown that the patented paper pulp based mixture may well be applied as an alternative material used for the elements of the sprue/gate systems for disposable sand moulds.

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Section: Discussionmentioning

confidence: 99%

Expanded Perlite, Expanded Vermiculite and Microspheres as Fillers in New Generation Paper Pulp Mixtures Used for Contact With Liquid Metal

Zawieja¹,

Sawicki²

2015

Adv. Sci. Technol. Res. J.

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“…Owing to their thermal resistance [15][16][17][18][19]22], which is higher than that of the commercial mixture [2,9], materials for the pulp modification used in the study give the experimental mixtures a thermal resistance comparable to that of commercial products [20,21], while at the same time reducing gas evolution. This effect can be attributed to the temperatures characteristic of the additives used in the study.…”

Section: Resultsmentioning

confidence: 99%

“…Different ceramic materials, which may have some disadvantages, but which contaminate the moulding compounds and prove difficult in mechanical treatment, are usually used to make casting systems for large and medium-sized casts. This paper presents a gas evolution study of a cellulosebased mixture obtained from waste paper with the addition of minerals resistant to high-temperature, such as expanded perlite, expanded vermiculite and microspheres [14][15][16][17][18][19]. Being materials of high thermal resistance, the additives modify the thermal resistance parameters of the cellulose-based mixture.…”

Section: Introductionmentioning

confidence: 99%

Gas Evolution Quantitative Analysis at a Temperature of 900°C of a Cellulose Mixture Modified by Mineral Additives

Zawieja¹,

Sawicki²

2016

Archives of Metallurgy and Materials

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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.

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“…Jel, erime noktasının altındaki kaba genleştirilmiş perlitin ısıl kararlılığı ve dayanıklılığını iyileştirmek için gözeneklerin yüzeyine uygulanmıştır. Kimyasal modifikasyon porselen kristalleri ile takviyelendirilen genleştirilmiş perlit yapısının güç-lenmesine neden olmuştur [10].…”

Section: Gi̇ri̇ş (Introduction) Enerji Ve Tabii Kaynaklar Bakanlığı Tarunclassified

İnşaat Sektöründe Kullanılan Yalıtım Malzemelerinin Isı ve Ses Yalıtımı Açısından Değerlendirilmesi

Arslan¹,

Aktaş²

2018

Journal of Polytechnic

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Thermal stability of expanded perlite modified by mullite

Cited by 37 publications

References 10 publications

Expanded Perlite, Expanded Vermiculite and Microspheres as Fillers in New Generation Paper Pulp Mixtures Used for Contact With Liquid Metal

Expanded Perlite, Expanded Vermiculite and Microspheres as Fillers in New Generation Paper Pulp Mixtures Used for Contact With Liquid Metal

Gas Evolution Quantitative Analysis at a Temperature of 900°C of a Cellulose Mixture Modified by Mineral Additives

İnşaat Sektöründe Kullanılan Yalıtım Malzemelerinin Isı ve Ses Yalıtımı Açısından Değerlendirilmesi

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