Alumina based low permittivity substrate utilizing superplastically foaming method

Wakiyama, Miyo; Hayashi, Hidetaka; Kishimoto, Akira

doi:10.2109/jcersj2.118.1090

Cited by 6 publications

(7 citation statements)

References 22 publications

(10 reference statements)

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“…Basic density was calculated dividing moisture-free mass by the saturated volume of the sample. The volume was determined using Archimedes' principle with water as the medium (Wakiyama et al 2010;Azzini et al 1981).…”

Section: Analytical Methods For Determining Energetic-related Propertmentioning

confidence: 99%

Brazilian Lignocellulosic Wastes for Bioenergy Production: Characterization and Comparison with Fossil Fuels

et al. 2013

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The aim of this paper was to analyze energy-related properties of forestry and agricultural wastes for energy production purposes, and to compare them with fossil fuels. The forestry wastes used were red cedar, Eucalyptus, and Pinus wood shavings. The agricultural wastes analyzed were rice husk, coffee wastes, sugar cane bagasse, maize harvesting wastes, and bamboo cellulose pulp. The forestry wastes presented more suitable properties for bioenergy production than the agricultural wastes. Desirable energetic properties were found for coffee wastes. The opposite was verified for rice husks. Among the biomass studied, coffee wastes presented the highest equivalent in fossil fuel volume and hence may lead to the highest decrease in CO 2 emissions by fossil fuels used in Brazil for steam and heat production. The results suggests that CO 2 benefits can be obtained if bioenergy is generated in the same locale where biomass is produced, avoiding CO 2 cost of logistics and leading to greater end-use efficiency. The present work promotes the widespread use of different lignocellulosic wastes for bioenergy production and gives useful information for the planning and the control of power plants using biomass.

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Section: Analytical Methods For Determining Energetic-related Propertmentioning

confidence: 99%

Brazilian Lignocellulosic Wastes for Bioenergy Production: Characterization and Comparison with Fossil Fuels

et al. 2013

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“…The following characterizations were performed: fiber length using a caliper with 0.001 cm of precision; scanning electron microscopy (SEM) using a TM3030 Plus (HITACHI) microscopy at 10 kV; width using the Software ImageJ to measure the fibers of the SEM micrographs; and basic density according to Wakiyama et al [22].…”

Section: Methodsmentioning

confidence: 99%

The properties of the mesocarp fibers of patauá, a multiple-use palm from the Amazonia forest

et al. 2019

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Patauá is very little studied palm tree of the Amazonia that shows lignocellulosic fibers covering the seed that can be easily removed. This work aimed to determine some properties of the patauá mesocarp fibers in the raw and alkali treated conditions for biomaterial applications. The wastes from the depulping of the patauá were obtained in commercial establishments at Macapá-Amapá-Brazil. The fibers were manually removed from the seeds. One portion of 10 g of fibers was treated by immersion in 1000 mL of sodium hydroxide (NaOH) aqueous solution at 5% kept at 100 °C for 1 h and under mechanical stirring. The following characterizations were performed: fiber length; scanning electron microscopy; width measurement; and basic density. The patauá mesocarp fibers are actually fiber bundles with erosions in the cell wall blocked by protrusions. They are suitable for large-scale production in both raw and alkali treated conditions. The improvements achieved by alkali treatment includes unblocking of superficial erosions, decrease of the width, length and basic density of the fibrous units, and increase of crystalline index. Individualization of fiber cells was not completed by the alkali treatment proposed in this work.

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“…While the process does not yield with highly porous samples (ϕ T was generally below 40%), yttria-stabilized zirconia (3YSZ and 8YSZ), alumina (with superplasticity-facilitating dispersoids; 3YSZ, 0YZ or spinel) and titania-based closed porosity ceramics were produced. [72][73][74][75][76][77][78][79][80] Similarly, recycled materials (eg, granite scrap and fired clay tailings) were used with SiC to cause gas generation and form closed porosity ceramic foams. 81 In a different technique, closed porosity aluminum oxynitride (AlON) (ϕ C = 80%) foams were made by combustion synthesis in between 2165°C and 2650°C for a very short time (10 seconds).…”

Section: Chemical Blowing Agentsmentioning

confidence: 99%

Closed porosity ceramics and glasses

2020

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In the last three decades, considerable effort has been devoted to obtain both open and closed porosity ceramics & glasses in order to benefit from unique combination of properties such as mechanical strength, thermal and chemical stability at low‐relative density. Most of these investigations were directed to the production and the analysis of the properties for open porosity materials, and regrettably quite a few compositions and manufacturing methods were documented for closed porosity ceramics & glasses in the scientific literature so far. This review focuses on the processing strategies, the properties and the applications of closed porosity ceramics & glasses with total porosity higher than 25%. The ones below such level are intentionally left out and the paper is set out to demonstrate the porous components with deliberately generated closed pores/cells. The processing strategies are categorized into five different groups, namely sacrificial templating, high‐temperature bonding of hollow structures, casting, direct foaming, and emulsions. The principles underlying these methods are given, with particular emphasis on the critical issues that affect the pore characteristics, mechanical, thermal and electrical properties of the produced components.

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Alumina based low permittivity substrate utilizing superplastically foaming method

Cited by 6 publications

References 22 publications

Brazilian Lignocellulosic Wastes for Bioenergy Production: Characterization and Comparison with Fossil Fuels

Brazilian Lignocellulosic Wastes for Bioenergy Production: Characterization and Comparison with Fossil Fuels

The properties of the mesocarp fibers of patauá, a multiple-use palm from the Amazonia forest

Closed porosity ceramics and glasses

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