Synthesis and characterization of high-density B 2 O 3 -added forsterite ceramics

Pratapa, Suminar; Handoko, Wahyu Dwi; Nurbaiti, Upik; Mashuri,

doi:10.1016/j.ceramint.2017.03.002

Cited by 20 publications

(13 citation statements)

References 33 publications

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“…In addition to the crystalline structures, silica also has an amorphous form. In our previous work, we successfully synthesized quartz, amorphous, and cristobalite powders from local silica sand. Those silicas have different elastic moduli, 92 GPa (quartz), 65 GPa (cristobalite), and 72 GPa (amorphous) .…”

Section: Introductionmentioning

confidence: 99%

Dynamic tensile and shear storage moduli of PEG/silica‐polymorph composites

Fauziyah

Hilmi

Fadly

et al. 2018

J of Applied Polymer Sci

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The effect of silica polymorphs on the thermomechanical properties of 0, 5, 10, and 20 wt % silica particles-reinforced-based poly(ethylene glycol) (PEG) composites have been studied as a function of temperature using dynamic mechanical analysis (DMA). The silica polymorphs exhibited quartz (Q), cristobalite (C), and amorphous (A) phases, which were obtained by processing natural silica sand. The DMA thermomechanical properties were determined in tensile (E) and shear (G) modes. The maximum storage moduli (E 0 and G 0 ) were achieved by samples with 20 wt % silica for all type of fillers. These values increased approximately 12 times for PEG/Q, 10 times for PEG/A, and 11 times for PEG/C composites compared to the pure PEG. Furthermore, the Poisson's ratio values of the composites were filler phase dependent, that is, 0.39-0.47 for PEG/Q, 0.15-0.18 for PEG/A, and somewhat anomalous for PEG/C composites.

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Section: Introductionmentioning

confidence: 99%

Dynamic tensile and shear storage moduli of PEG/silica‐polymorph composites

Fauziyah

Hilmi

Fadly

et al. 2018

J of Applied Polymer Sci

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“…Our previous study showed that the addition of boria could decrease the porosity of forsterite ceramics up to 0,3%. 11 Therefore, the addition of boria increases the density of zircon ceramics, but addition up to 9 wt% is still not optimum to achieve ultra-dense zircon ceramics. 1 also shows the zircon crystallite size in the ceramics.…”

Section: Resultsmentioning

confidence: 99%

“…With the addition of 4 wt.% Boria, and 3 wt.% Polyvinyl alcohol powder as sintering agent, high density forsterite ceramics were successfully formed with 0.3% porosity at a sintering temperature of 1200 ºC. 11 From this frame of mind, this study was then designed to offer an opportunity to realize the value added of Central Kalimantan zircon sand as a ceramic-making material with the addition of B2O3 and the characterization performed is the structure and mechanical properties of density and ceramic hardness.…”

Section: Introductionmentioning

confidence: 99%

Phase Analysis and Physical Properties of B2o3-Added Zircon Ceramics Sintered at 1300 °c

Su'ud

Pratapa

Musyarofah

2021

Neu

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This study was aimed to know the effect of B2O3(boria) addition on the phase composition and physical properties of zircon ceramics.The raw zircon powder used in the study was a purified natural zircon sand from Kereng Pangi, Central Kalimantan, Indonesia. The zircon ceramics were prepared by a solid state reaction method with variation of B2O3 addition of 3 wt%, 6 wt% and 9 wt% and sintered at 1300 °C for 5h. The phase composition, density and microstructure were characterized using X-ray diffraction (XRD), densimeter and Scanning Electron Microscope (SEM), respectively. Vickers Hardness measurement was perfomed at the polished surface of the ceramics. Results showed that all samples contained pure zircon phase, i.e. there was no effect of B2O3 addition on the phase composition. In general, the density and hardness increased with increasing B2O3 addition, but addition up to 9 wt% is not optimum to achieve ultra-dense zircon ceramics. Furthermore, the SEM image also showed no significant difference in average grain size. The crystallite size has grown nearly eight times (325 nm) of its original powder. The Vickers hardness of the ceramics is not significantly influenced by the addition of boria. It appears that the boria failure to increase densification also results in the extent of contact between grains which then produces relatively large zircon grains.

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“…For the typical liquid phase sintering, a suitable sintering aid with low melting point is added into the ceramic powder, and the ceramic is soluble in the liquid sintering aid above its melting point. [12][13][14] It is worthy to note that H 3 BO 3 is another common sintering aid, 15-17 while B 2 O 3 is the liquid phase that really acts due to the decomposition of H 3 BO 3 into B 2 O 3 . 1,2 The microwave dielectric ceramics have been widely used in microwave circuits as resonator units and substrates.…”

Section: Introductionmentioning

confidence: 99%

“…22 Among the sintering aids for microwave dielectric ceramics, B 2 O 3 has been widely used because of its very low melting point. [12][13][14] It is worthy to note that H 3 BO 3 is another common sintering aid, [15][16][17] while B 2 O 3 is the liquid phase that really acts due to the decomposition of H 3 BO 3 into B 2 O 3 . Furthermore, B 2 O 3 has also been widely used in the microwave dielectric materials of boron-based ceramics and glass.…”

Section: Introductionmentioning

confidence: 99%

Preparation and microwave dielectric properties of B₂O₃ bulk

Hong

Yan

et al. 2019

Int J Applied Ceramic Tech

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The transparent B2O3 bulks were prepared by quenching B2O3 melt or cooling it down to room temperature with the rate of 0.1‐1°C/min. The quenched sample exhibited the dense microstructure, while the pores were observed for low cooling rates, and this is consistent with the slight decrease in density and permittivity (εr) with decreasing the cooling rate. Both the amorphous and cubic phases of B2O3 were indicated by XRD, and the content of the cubic phase increased with the decrease in cooling rate, which was responsible for the decreasing Qf value with the lower cooling rate. The temperature coefficient of resonant frequency (τf) was insensitive to the cooling rate, and the microwave dielectric properties with εr = 3.86‐3.97, Qf = 3,200‐5,300 GHz and τf = −48.9 to −42.8 ppm/°C were obtained in the B2O3 bulks. The reported microwave dielectric properties of B2O3 bulk are helpful to estimate the effects of the residual B2O3 on the properties of the microwave dielectric ceramics with B2O3 and H3BO3 as the sintering aid.

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Synthesis and characterization of high-density B 2 O 3 -added forsterite ceramics

Cited by 20 publications

References 33 publications

Dynamic tensile and shear storage moduli of PEG/silica‐polymorph composites

Dynamic tensile and shear storage moduli of PEG/silica‐polymorph composites

Phase Analysis and Physical Properties of B2o3-Added Zircon Ceramics Sintered at 1300 °c

Preparation and microwave dielectric properties of B₂O₃ bulk

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Synthesis and characterization of high-density B 2 O 3 -added forsterite ceramics

Cited by 20 publications

References 33 publications

Dynamic tensile and shear storage moduli of PEG/silica‐polymorph composites

Dynamic tensile and shear storage moduli of PEG/silica‐polymorph composites

Phase Analysis and Physical Properties of B2o3-Added Zircon Ceramics Sintered at 1300 °c

Preparation and microwave dielectric properties of B2O3 bulk

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Preparation and microwave dielectric properties of B₂O₃ bulk