Effect of Amount and Size of Quartz on Mechanical and Dielectric Properties of Electrical Porcelain

Boussouf, Lila; Zehani, Fouzia; Khenioui, Youcef; Boutaoui, N.

doi:10.1080/0371750x.2018.1500148

Cited by 14 publications

(10 citation statements)

References 24 publications

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“…It can be noted that the principle crystalline phase present in the samples is quartz (Q), represented by the highest intensity peak at 2θ~25 0 . It can be seen that the intensity of the quartz peaks increases in parallel with the increase of the quartz particle size, which indicates low dissolution of coarse quartz particles and high dissolution for fine particles [9]. Similarly, the intensity of mullite (M) peaks increases with decreasing quartz particle Figure 5), implying that samples with fine quartz particle size exhibited a higher population of mullite crystals than others hence improving their flexural strength.…”

Section: Microstructure and Phase Analysismentioning

confidence: 89%

“…The water absorption decreases with increase in firing temperature. This observation is a result of good densification of the samples [9]. At about 1100°C, K-feldspar starts melting to form a liquid phase that surrounds the particles [2].…”

Section: Water Absorptionmentioning

confidence: 99%

“…According to mullite hypothesis [10], mullite crystals act as a re-enforcement to the glassy phase. The mullite content is enhanced by fine size of the quartz particles [9]. Recently, Güngör (2018) investigated the influence of quartz particle size on the mechanical strength of porcelain.…”

Section: Flexural Strength/modulus Of Rupture (Mor)mentioning

confidence: 99%

“…Quartz promotes thermal and dimensional stability thus preventing warping. However, for glassy and vitreous materials like porcelain, the principle factor influencing flexural strength is quartz particle size [3,6,8,9].…”

Section: Introductionmentioning

confidence: 99%

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Effect of Quartz Particle Size on Sintering Behavior and Flexural Strength of Porcelain Tiles Made from Raw Materials in Uganda

Ochen

D’ujanga

Oruru

2019

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The presence of quartz particle size (> 45 µm) has a deleterious effect on physio-mechanical properties of porcelain tiles. The effect is due to various factors including microstructure (pore) after sintering. This study aims at investigating the effect of quartz particle size (QPS) on sintering behavior and flexural strength of porcelain tiles made from raw materials in Uganda. Samples containing fine, medium and coarse QPS were pressed at 40 MPa, fired from 1150-1350°C at a firing rate of 60°C/min, and soaked for 1 hour. The influence of QPS on linear shrinkage, water absorption and flexural strength was determined. Microstructure analysis of the fired samples was carried out using Scanning Electron Microscope (SEM), and phase identification was studies using x-ray diffraction. The SEM showed large-interconnected pores for coarse QPS, and smaller-isolated pores for fine QPS. At optimum sintering temperature, samples with fine, medium and coarse QPS had values of 0.47, 0.9 and 7.1% water absorption respectively. Pressed tiles with ≤5% water absorption are classified as group BI a (porcelain tiles) and those > 0.5-≤3% as group BI b suitable as floor or wall tiles (ISO 13006). Also, the average flexural strength of 33, 18 and 8 MPa was exhibited by samples with fine, medium and coarse QPS respectively. The results indicate that only samples with fine and medium QPS satisfy the requirement ≥ 35±2 MPa and > 12 MPa for floor and wall tiles respectively (ISO 13006).

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Section: Microstructure and Phase Analysismentioning

confidence: 89%

Section: Water Absorptionmentioning

confidence: 99%

Section: Flexural Strength/modulus Of Rupture (Mor)mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effect of Quartz Particle Size on Sintering Behavior and Flexural Strength of Porcelain Tiles Made from Raw Materials in Uganda

Ochen

D’ujanga

Oruru

2019

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“…However, none mullite was observed in SQ4 samples. Recently, Boussouf et al (2018), reported that the presence of mullite reduces the formation cracks. Additionally, mullite crystals are known for their strengthening mechanism.…”

Section: Flexural Strengthmentioning

confidence: 99%

Microstructure and Residual Stress Effect on the Flexural Strength of Porcelain Tiles Formulated from Locally Available Materials in Uganda

Ochen

D’ujanga

Oruru

2019

EAJSTI

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Quartz is an inexpensive raw material used in the production of porcelain tiles. The presence of quartz prevents pyroplastic deformation during sintering. However, the use of quartz particle size exceeding 32 µm has a deleterious effect on the flexural strength of porcelain tiles. Therefore, the aim of this study was to investigate the effect of microstructure and residual stress on the flexural strength of porcelain tiles formulated with different quartz particle sizes, within the range of 45 to 200 µm. The samples made of kaolin, feldspar and quartz were mixed in the ratio of 5:3:2 respectively, and die pressed at 40 MPa. Afterwards, the green body was sintered at 1300 0C for 2 hours at a rate of 60 0C/min. The microstructure of the sintered body was characterized by using a scanning electron microscope (SEM) to examine the nature and size of the pores. In addition, the residual stress was evaluated based on X-ray diffraction (XRD) method and corroborated with SEM. The flexural strength was determined using three points loading method. The samples formulated with quartz particle size of 45 µm exhibited smooth granules, and isolated pores within the range of 3-8 µm. But, those with 200 µm particles size exhibited rough granules, and interconnected pores between 10-34 µm. Initially, there was an increase in the residual stress, but above 90 µm particle size, it decreased due to evolution of cracks. Also, an increase in quartz particle size resulted in a decline in flexural strength from to MPa. These results show that increasing quartz particle size affected the pore morphology and the residual stresses. Therefore, fine quartz particle milling should be taken into account for further improvement of flexural strength.

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Study on phase behavior and mechanical properties of high temperature resistant materials prepared from waste electric porcelain

Wang

Liu

Wei

et al. 2023

Ceramics International

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Effect of Amount and Size of Quartz on Mechanical and Dielectric Properties of Electrical Porcelain

Cited by 14 publications

References 24 publications

Effect of Quartz Particle Size on Sintering Behavior and Flexural Strength of Porcelain Tiles Made from Raw Materials in Uganda

Effect of Quartz Particle Size on Sintering Behavior and Flexural Strength of Porcelain Tiles Made from Raw Materials in Uganda

Microstructure and Residual Stress Effect on the Flexural Strength of Porcelain Tiles Formulated from Locally Available Materials in Uganda

Study on phase behavior and mechanical properties of high temperature resistant materials prepared from waste electric porcelain

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