Y&lt;sub&gt;3&lt;/sub&gt;Fe&lt;sub&gt;5&lt;/sub&gt;O&lt;sub&gt;12&lt;/sub&gt;&lt;i&gt; &lt;/i&gt;Nanocatalyst for &lt;i&gt;Green ammonia&lt;/i&gt; Production by Using Magnetic Induction Method

Abstract.Research on finding suitable cement substitute material becomes massive due to environmental effect. Geopolymer as inorganic material is potential to be the smart solution to overcome global warming issue. Fly ash is a waste material rich in silica and alumina becomes popular raw material to produce geopolymer. The best properties ofgeopolymer paste come from the high quality of fly ash. Therefore, it is important to investigate various types of fly ash and geopolymer properties. Their chemical and physical properties characterized by XRF, pH value, XRD and SEM. The results showed that type of fly ash depended on amount of Si-based of Ca-based compound which consisted of spherical morphology. Geopolymer paste produced from the ash with different compound has bulky and irregular shape morphology. The pH value of each ash has also a correlation with the setting time of fresh paste.

show abstract

“…X-Ray diffraction with CuKD radiation, KD= 0.89 and wavelength O = 1.54056 Å was used to determine the crystal structure [18]. Fig.…”

Section: Xrd Testmentioning

confidence: 99%

Chemical and Physical Characterization of Fly Ash as Geopolymer Material

2017

Self Cite

View full text Add to dashboard Cite

show abstract

“…Figure 1 shows that the cubical structure was observed at the highest peak (110). To measure the size of the crystallites, the Scherrer equation [24][25][26] was utilized as shown as Table 1. The samples heated at 400, 500, and 600 °C had crystallite sizes of 17.730, 15.197, and 13.296 nm, respectively.…”

Section: Resultsmentioning

confidence: 99%

In Search of Magnetic Properties of Samarium Cobalt (Sm2Co17) within a Low-Temperature Sintering Process

Puspitasari

Muhammad

Permanasari

et al. 2021

Bull. Chem. React. Eng. Catal.

Self Cite

View full text Add to dashboard Cite

Samarium cobalt is known as super high density magnetic material with large magnetic anisotropy energy. Samarium–cobalt exhibits manipulative magnetic properties as a rare-earth material which has different properties in a low sintering temperature. It is therefore of paramount importance to investigate samarium cobalt (Sm2Co17) magnetic properties in the low temperature sintering condition. Sm2Co17, which is utilized in this research, is synthesized via the sol–gel process at sintering temperatures of 400, 500, and 600 °C. Subsequently, the crystallites indicate the formation of a single-phase Sm2Co17 on all the samples in all temperature variations. Moreover, the peaks in the X-ray diffraction analysis of crystallite sizes calculated using the Scherrer equation are 17.730, 15.197, and 13.296 nm at 400, 500, and 600 °C. Through scanning electron microscopy, the particles are found to be relatively large and agglomerated, with average sizes of 143.65, 168.78, and 237.26 nm. The functional groups are also analyzed via Fourier-transform infrared spectroscopy, which results in the appearance of several bonds in the samples, for example, alkyl halides, alkanes, and esters with aromatic functional groups on the fingerprint area and alkynes, alkyl halides, and alcohol functional groups at a wavelength of above 1500 cm. The test results of the magnetic properties using vibrating-sample magnetometer (VSM) revealed high coercivity and retentivity in the samples sintered at 400 °C. However, the highest saturation occurs in the samples sintered at 600 ℃. At a low sintering temperature (below 1000 °C), samarium cobalt shows as the soft magnetic material. Copyright © 2021 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0).

show abstract

“…Sintering temperature affects the particle size of the material because sintering causes the particles to react and bind. A rise in sintering temperature is resulting in the increasing size of the particle in manganese-zinc ferrite material [22,23], whereas stated in [16], the manganese-zinc ferrite material with annealing treatment at 400C, 600C and 1200C shows bigger particle size along with higher sintering temperature. VSM test for manganese-zinc ferrite (Mn 0.8 Zn 0.2 Fe 2 O 4 ) with sintering holding-time variations can be found in phase.…”

Section: Resultsmentioning

confidence: 99%

Time Dependence on Magnetic Properties of Nanomaterial Manganese–Zinc Ferrite (Mn0.8Zn0.2Fe2O4) by Co-Precipitation Method

2019

Nanosist. Nanomater. Nanotehnol.

View full text Add to dashboard Cite

Researches on manganese-zinc ferrite Mn 0.8 Zn 0.2 Fe 2 O 4 got popular due to its good magnetic properties as a soft magnetic material. Studies on Mn 0.8 Zn 0.2 Fe 2 O 4 magnetic properties, especially before and after the sintering process, are required to see its magnetic material characterisation. Therefore, this research focused on manganese-zinc ferrite Mn 0.8 Zn 0.2 Fe 2 O 4 characterisations using co-precipitation method with sintering time variations of 3, 4, and 5 hours at 1100C. Base materials used in this research were manganese oxide (MnO), zinc oxide (ZnO), and iron oxide (Fe 2 O 3). XRD, SEM-EDX, and VSM tests were used to characterise phase, morphology, and magnetic properties. Mn 0.8 Zn 0.2 Fe 2 O 4 with 3, 4, and 5 hours holding time sintering process resulted in crystallite size changed into 70.4194 nm, 52.91546 nm, and 26.45 nm. During the holding time of sintering process, the single Mn 0.8 Zn 0.2 Fe 2 O 4 phase was formed, the materials were in one lattice, and it has cubic shape structures. Sintering process affects particle bulk size; a higher sintering temperature increases particle bulk size. Materials with holding time sintered that formed a single Mn 0.8 Zn 0.2 Fe 2 O 4 phase had higher magnetic retentivity compared to materials before sintering. This is evident by magnetic saturation (M s) and magnetic remanence (M r) values that are higher than for materials with

show abstract

Y<sub>3</sub>Fe<sub>5</sub>O<sub>12</sub><i> </i>Nanocatalyst for <i>Green ammonia</i> Production by Using Magnetic Induction Method

Cited by 9 publications

References 13 publications

Chemical and Physical Characterization of Fly Ash as Geopolymer Material

Chemical and Physical Characterization of Fly Ash as Geopolymer Material

In Search of Magnetic Properties of Samarium Cobalt (Sm2Co17) within a Low-Temperature Sintering Process

Time Dependence on Magnetic Properties of Nanomaterial Manganese–Zinc Ferrite (Mn0.8Zn0.2Fe2O4) by Co-Precipitation Method

Contact Info

Product

Resources

About