Topic
Calcium oxide
About: Calcium oxide is a research topic. Over the lifetime, 7600 publications have been published within this topic receiving 66104 citations. The topic is also known as: caustic lime & quicklime.
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TL;DR: In this paper, the behavior of five italian fly ashes in mixtures with lime, phosphogypsum and water has been investigated at 25 and 40°C using a composition ratio fly ash:lime:phosphogypum of 60:40:20.
30 citations
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06 Nov 2006
TL;DR: In this paper, a glass filler for polycarbonate resin resins is presented, whereby the refractive index of the glass filler can be improved to the same level as a poly-carbonate resin, and the transparency of a molded product after reinforced with such a filler is maintained without coloration.
Abstract: A glass filler for a polycarbonate resin, whereby the refractive index of the glass filler can be improved to the same level as a polycarbonate resin, and the transparency of a molded product after reinforced with such a filler can be maintained without coloration, and a polycarbonate resin composition employing such a filler, are provided. The polycarbonate resin composition comprises a polycarbonate resin and a glass filler which comprises, as inorganic components in the entire glass filler, from 50 to 60 mass % of silicon dioxide (SiO 2 ), from 7 to 15 mass % of aluminum oxide (Al 2 O 3 ), from 10 to 20 mass % of calcium oxide (CaO), from 0 to 5 mass % of magnesium oxide (MgO), from 2 to 8 masse of zirconium is oxide (ZrO 2 ), from 0 to 10 mass % of zinc oxide (ZnO), from 0 to 10 mass % of strontium oxide (SrO), from 0 to 18 mass % of barium oxide (BaO), from 0 to 2 mass % of lithium oxide (Li 2 O), from 0 to 2 mass % of sodium oxide (Na 2 O), and from 0 to 2 mass % of potassium oxide (K 2 O), provided that the total content of the lithium oxide (Li 2 O), the sodium oxide (Na 2 O) and the potassium oxide (K 2 O) is from 0 to 2 mass % based on the entire glass filler.
30 citations
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08 Nov 1983
TL;DR: A fire or flame barrier material comprising an ethylene copolymer matrix, 150-220 parts by weight of aluminum hydroxide and 150 -220 parts of calcium carbonate or calcium-magnesium carbonate can be found in this article.
Abstract: A fire or flame barrier material comprising an ethylene copolymer matrix, 150-220 parts by weight of aluminum hydroxide and 150-220 parts by weight of calcium carbonate or calcium-magnesium carbonate. The material can also include a lubricating agent, an elasticizer, calcium oxide, a polymer softening agent, a color-aging agent, and an antioxidant agent.
30 citations
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TL;DR: This article used desludging centrifuge to remove insoluble calcium salts to remove the precipitate formed from calcium addition, which reduced the protein content of the powder and increased the solubility index.
30 citations
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TL;DR: In this paper, the authors investigated the processing conditions required for the creation of calcium oxide (lime) from green-lipped mussel (Perna canaliculus) and pacific oyster (Crassostrea gigas) shells.
Abstract: Shells from the seafood processing industry in New Zealand are currently an under-utilized waste resource. In this study we investigate the processing conditions required for the creation of calcium oxide (lime) from green-lipped mussel (Perna canaliculus) and pacific oyster (Crassostrea gigas) shells. Lime is commonly used in wastewater treatment for the removal of phosphorous compounds from water, thus providing a means of eutrophication control. Mussel and oyster shells were processed in a horizontal tube furnace at various temperatures (650–800 °C) in both air and nitrogen environments. From X-ray diffraction (XRD) and weight-loss measurements, the extent of limestone calcination was found to increase with increasing furnace temperature for both shell species and furnace atmospheres. Analysis showed that the lime was present as a layer on the surface of the shell particles. From scanning electron microscope (SEM) images, significant changes in the surface morphology of the raw shells were observed as a result of heat treatment in both air and nitrogen atmospheres. Preliminary testing of shells heat-treated in both air and nitrogen atmospheres indicated that both types of shell removed about 90% of phosphates in water within 30 min, whereas up to 40% of phosphates were removed with untreated shells. Our results for heat-treated oyster shell differ slightly with studies in the literature, which report an absence of compositional and structural changes in an air atmosphere. Copyright © 2007 Curtin University of Technology and John Wiley & Sons, Ltd.
30 citations