The Effects of Mineral Composition and Sintering Temperature on Synthetic Mullite

2014 ◽  
Vol 633 ◽  
pp. 65-68
Author(s):  
Lei Li ◽  
Xiao Guang Zhang ◽  
Rui Long Wen ◽  
Cheng Biao Wang ◽  
Ming Hao Fang ◽  
...  
Keyword(s):  
Phase Composition ◽  
Flexural Strength ◽  
Physical Properties ◽  
Energy Saving ◽  
Environmental Protection ◽  
Mineral Composition ◽  
Sintering Temperature ◽  
Final Phase ◽  
Mullite Phase ◽  
Industrial Alumina

Mullite material was prepared from quartz (SiO2) and industrial alumina (γ-Al2O3). The effects of mineral composition and sintering temperature on the final phase composition and physical properties of mullite were investigated. The results shown that a large number of mullite phase was emerged in samples when the ratio of alumina to silica (A/S) was 2.55. At 1500 oC and 1600 oC, the flexural strength of the samples reached to 87.13 MPa and 89.50 MPa, respectively. Consider the environmental protection and energy saving, the optimal sintering temperature was 1500 °C.

Effect of Mineral Composition and Sintering Temperature on the Synthetic Cordierite

2014 ◽  
Vol 633 ◽  
pp. 61-64
Author(s):  
Lei Li ◽  
Rui Long Wen ◽  
Xiao Guang Zhang ◽  
Cheng Biao Wang ◽  
Ming Hao Fang ◽  
...  
Keyword(s):  
Phase Composition ◽  
High Temperature ◽  
Flexural Strength ◽  
Mineral Composition ◽  
Sintering Temperature ◽  
Raw Materials ◽  
Temperature Reaction ◽  
Final Phase ◽  
High Temperature Reaction ◽  
Industrial Alumina

Cordierite samples were prepared using quartz sand tailings, industrial alumina and magnesite tailings as raw materials by high-temperature reaction. The influence of mineral composition and sintering temperature on the final phase composition and physical properties of cordierite were studied. The results shown that a large number of cordierite generated at 1300 °C. When the ratio of Al2O3/SiO2 equals to 1.08, the flexural strength of samples increased to 27.66 MPa.

Effect of Y2O3 on the Sintering, Mechanical and Dielectric Properties of Mullite/h-BN Composites

2016 ◽  
Vol 848 ◽  
pp. 28-31
Author(s):  
Han Jin ◽  
Yong Feng Li ◽  
Zhong Qi Shi ◽  
Hong Yan Xia ◽  
Guan Jun Qiao
Keyword(s):  
Fracture Toughness ◽  
Dielectric Constant ◽  
Phase Composition ◽  
High Temperature ◽  
Dielectric Properties ◽  
Liquid Phase ◽  
Flexural Strength ◽  
Sintering Temperature ◽  
Pressureless Sintering ◽  
Different Temperatures

Mullite/10 wt. %h-BN composites with 5 wt. % Y2O3 additive were fabricated by pressureless sintering at different temperatures. The densification, phase composition, microstructure, mechanical and dielectric properties of the mullite/h-BN composites were investigated. With the addition of Y2O3, the sintering temperature of the mullite/h-BN composites declined, while the density, mechanical and dielectric properties all increased. The addition of Y2O3 promoted the formation of liquid phase at high temperature, which accelerated the densification. Besides, Y2O3 particles which were located at the grain boundaries inhibited the grain growth of mullite matrix. For the mullite/h-BN composites with Y2O3 additive, the appropriate sintering temperature was about 1600°C. The relative density, flexural strength, fracture toughness and dielectric constant of the Y2O3 doped mullite/h-BN composite sintered at 1600 °C reached 82%, 135 MPa, 2.3 MPa·m1/2 and 4.9, respectively.

The Effect of MgO-Y2O3 on Al2O3-TiC Composites

2007 ◽  
Vol 534-536 ◽  
pp. 605-608 ◽  
Author(s):  
Supawan Kasuriya ◽  
Duangduen Atong
Keyword(s):  
Mechanical Properties ◽  
Flexural Strength ◽  
Physical Properties ◽  
Sintering Temperature ◽  
Argon Atmosphere ◽  
Heating Element ◽  
Sintering Aid ◽  
Better Than

The effect of the additives, Y2O3 and MgO, on the sintering and properties of Al2O3-TiC composites was investigated. It is known that MgO is used as additive for improving densification and Y2O3 is applied as sintering aid. In this study, the amounts of TiC were varied in the range of 30-47 wt%. The 0.5 wt% MgO and also varied amounts of Y2O3 from 0.3 to 1 wt% were added into the composites. The sintering of Al2O3-TiC composites was performed in a graphite- heating element furnace at different sintering temperature, 1700 and 1900°C, for 2 hr under an argon atmosphere. The results demonstrated that the properties of the composites sintered at 1700°C were much better than those sintered at 1900°C. The comparisons on physical properties, mechanical properties and microstructure of composites with and without additives were reported. Comparing with other samples, Al2O3-30wt%TiC composites with 0.5wt% MgO and 1 wt%Y2O3 exhibited the highest density of approximately 98% of theoretical and flexural strength of 302 MPa.

Preparation of Sulfoaluminate Cement Using Industrial Waste Residue

2011 ◽  
Vol 396-398 ◽  
pp. 380-385
Author(s):  
Lei Wang ◽  
Ye Wang ◽  
Tian Hua Yang ◽  
Run Dong Li
Keyword(s):  
Mechanical Properties ◽  
Compressive Strength ◽  
Corrosion Resistance ◽  
Flexural Strength ◽  
Physical Properties ◽  
Industrial Waste ◽  
Sintering Temperature ◽  
Setting Time ◽  
Cement Clinker ◽  
Environmental Technology

Large amount of emissions from industrial waste residue to the environment has caused serious pollutions. Utilization way to using industrial waste residue preparing sulfoaluminate cement (SAC) is got much attention of scholars both at home and abroad. It summarized the present researches for preparation of SAC from industrial waste residue (IWR). Sintering temperature, mineral composition, physical properties (fineness, standard viscosity, setting time), mechanical properties (compressive strength, flexural strength) and corrosion resistance of cement clinker were analyzed. Preparation of SAC clinker using IWR is a very promising environmental technology.

Experimental Study on Synthesis of High Purity Mullite

2011 ◽  
Vol 328-330 ◽  
pp. 1343-1346
Author(s):  
Zhen Wu Shi ◽  
Nian Suo Xie
Keyword(s):  
Experimental Study ◽  
Phase Composition ◽  
Constant Temperature ◽  
High Purity ◽  
Sintering Temperature ◽  
Dissolution Mechanism ◽  
Resistance Furnace ◽  
Output Rate ◽  
Mullite Phase

In this paper, the influence of sintering temperature on the output rate of the mullite which was formed from andalusite ore of Mei County Shaanxi at different constant temperature 1350°C, 1450°C, 1550°C and the mechanism which mullite was transformed were studied. The morphology of mullite formed at 1450°C was obtained by SEM, and the phase composition of andalusite ore sintered at different temperature was analyzed by XRD. The results shows that the mullitization effect of andalusite ore of Mei County Shaanxi is excellent, and the yield of mullite mineral can reach the desired results of 100% after andalusite mineral of Mei County Shaanxi is kept warming for 3 hours at the sintering temperature of 1450°C and cooled naturally with box-type resistance furnace. The mullite phase synthesized by andalusite ore of Mei County Shaanxi depends on not only the decomposition of andalusite, but also the secondary mullitization and the dissolution mechanism.

scholarly journals Sintering and properties of dioxide of ceramics containing the sodium silicate additive

2019 ◽  
Vol 488 (1) ◽  
pp. 36-39
Author(s):  
V. V. Smirnov ◽  
S. V. Smirnov ◽  
T. O. Obolkina ◽  
O. S. Antonova ◽  
M. A. Goldberg ◽  
...  
Keyword(s):  
Phase Composition ◽  
Low Temperature ◽  
Flexural Strength ◽  
Sodium Silicate ◽  
Nanocrystalline Materials ◽  
Zirconium Dioxide ◽  
Crystal Size ◽  
Sintering Temperature ◽  
Sintering Additive ◽  
Stabilized Zirconium Dioxide

The dependences of the formation of the microstructure and the phase composition of ceramics based on partially stabilized zirconium dioxide on the sintering temperature and the content of the sintering additive are established. It is shown that the introduction of an additive, which forms a low-temperature melt based on sodium silicate - Na2SiO3, leads to a decrease in the sintering temperature by 200 °C. As a result of the work, were obtained dense nanocrystalline materials with a crystal size of 100-200 nm, flexural strength up to 600 MPa and a sintering temperature of 1200-1250 °C. 

The Effect of Sintering Temperature on the Physical Properties and Bending Strength of Zirconia Toughened Ceramic

2012 ◽  
Vol 519 ◽  
pp. 273-276
Author(s):  
Ze Quan Hua ◽  
Bin Zhang ◽  
Ji Hua Chen ◽  
Lian Jun Sun ◽  
Ying Zhang
Keyword(s):  
Flexural Strength ◽  
Physical Properties ◽  
Bending Strength ◽  
Sintering Temperature ◽  
Yttria Stabilized Zirconia ◽  
Surface Porosity ◽  
Stabilized Zirconia ◽  
Three Point Bending ◽  
Temperature Range ◽  
Press Method

This research investigated the effect of sintering temperature on the physical properties and bending strength of zirconia toughened ceramic (ZTC). 3mol% yttria-stabilized zirconia compacts were prepared by dry press method and then sintered with different final sintering temperature: 1490°C, 1530°C, 1570°C and 1610°C respectively. The physical properties and three-point bending strength were measured. The results of the test indicated that the density and shrinkage of ZTC increased along with the rise of sintering temperature, while the surface porosity of the samples decreased. The curve of flexural strength is indicated the variolation tendency of falling after rising, being the maximum at 1570°C. The results of this experiment showed that the best sintering temperature of yttria-stabilized zirconia was showed at 1570°C in terms of physical properties and bending strength among the selected temperature range.

scholarly journals The effect of nano-TiO2 addition on the properties of mullite-zirconia composites prepared by slip casting

2012 ◽  
Vol 44 (3) ◽  
pp. 341-354 ◽  
Author(s):  
S.H. Badiee ◽  
S. Otroj ◽  
M. Rahmani
Keyword(s):  
Phase Composition ◽  
Flexural Strength ◽  
Physical Properties ◽  
Slip Casting ◽  
Reaction Sintering ◽  
Casting Method ◽  
Nano Tio2 ◽  
Zircon Powder ◽  
Zirconia Composites ◽  
Tio2 Addition

The mullite-zirconia composites were prepared by reaction-sintering of alumina and zircon powder. Besides, the slip casting method was employed for fabrication of these composites. Then, the effect of nano-TiO2 addition on the properties of these composites was investigated and the results were compared with micro-sized TiO2. Hence, the physical properties, phase composition, flexural strength and microstructure of these composites after firing at 1600?C were studied. The results showed that the flexural strength of composite tends to increase with the addition of 0.5 wt.% nano-TiO2. It is attributed to the formation of larger size rod-like ZrO2 and enhanced ceramic bonding between them.

Effect of spark plasma sintering temperature on structure and phase composition of Ti-Al-Nb-based alloys

2017 ◽  
Vol 59 (11-12) ◽  
pp. 1033-1036 ◽  
Author(s):  
Sherzod Kurbanbekov ◽  
Mazhyn Skakov ◽  
Viktor Baklanov ◽  
Batyrzhan Karakozov
Keyword(s):  
Phase Composition ◽  
Spark Plasma Sintering ◽  
Sintering Temperature ◽  
Plasma Sintering ◽  
Spark Plasma

Analysis and Design of Environmental Protection and Energy Saving in Modern Society Building

2014 ◽  
Vol 908 ◽  
pp. 355-358
Author(s):  
Jie Zhao
Keyword(s):  
Energy Saving ◽  
Environmental Protection ◽  
Architectural Design ◽  
New Technology ◽  
Modern Society ◽  
Modern Architecture ◽  
Analysis And Design ◽  
The People ◽  
Development Direction ◽  
Design Requirements

With the development of economy and the improvement of people's living level, improving living conditions and public buildings, architectural design requirements are also constantly improved. Modern architecture should consider not only beautiful and comfortable, but also take into account the design individuality, while taking into consideration the people-oriented design concept of environmental protection and energy saving. This also makes the environmental friendly and energy-saving building is the development direction of future architecture. This paper analyzes the modern architecture of the ecological and environmental protection, gives the method to realize the construction of energy-saving environmental protection design and the use of new materials, new equipment and new technology of the existing.

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