Porcelain represents one of the most complex ceramics, formulated from a mix of clay, feldspar and quartz, sintered at temperatures between 1200• C and 1400• C, to form a glass-ceramic composite. Aluminium titanate (Al2TiO5) exhibits extremely good thermal shock resistance and low thermal conductivity, coupled with good chemical resistance in molten metals. In the present work, aluminium titanate/porcelain ceramics composites with dierent percentages of Al2TiO5 was prepared using powder metallurgy techniques. The microstructural, mechanical and thermal properties were characterized using XRD, SEM, dilatometer and a hardness meter. Thermal shock resistance behaviour under water quenching of the as-prepared ceramics was also evaluated. The results have revealed that the addition of aluminium titanate to porcelain matrix improves the properties of the aluminium titanate/porcelain ceramics.

Spinel (MgAl2O4) ceramics possesses a high melting point, high hardness, a relatively low density, excellent transmittance, a high strength, a relatively low thermal expansion coecient, high thermal shock resistance and high chemical inertness. Aluminium titanate (Al2TiO5) exhibits extremely good thermal shock resistance and low thermal conductivity coupled with good chemical resistance in molten metals. In the present work, aluminium titanate/spinel ceramics composites with dierent percentages of Al2TiO5 were prepared using powder metallurgy techniques. The microstructural, mechanical and thermal properties were characterized using X-ray diraction, scanning electron microscopy, dierential scanning calorimetry, dilatometer and hardness. Thermal shock resistance behaviour under water quenching of the as-prepared ceramics was also evaluated. Results revealed that the addition of aluminium titanate to spinel matrix improves the properties of the aluminium titanate/spinel ceramics.

Talc (3MgO·4SiO2·H2O) has excellent mechanical properties, shock and abrasion resistance, good electrical and thermal shock resistance, softness, isolation, chemical activity, heat resistance and oil absorption properties. Aluminium titanate (Al2TiO5) exhibit extremely good thermal shock resistance and low thermal conductivity coupled with good chemical resistance in molten metals. In the present work, Aluminium titanate/talc ceramics composites with dierent percentages of Al2TiO5 was prepared using powder metallurgy techniques. The microstructural, mechanical and thermal properties were characterized using XRD, SEM, dilatometer and hardness. Thermal shock resistance behaviour under water quenching of the as-prepared ceramics was also evaluated. Results, revealed that the addition of aluminium titanate to talc matrix improves the properties of the aluminium titanate/talc ceramics.

The investigation of the effect of particle size and velocity on solid particle wear properties of basalt base glass-ceramics AIP Conference Proceedings 1809, 020022 (2017) Abstract. Basalt based glass-ceramics were prepared by conventional melt-quenching technique and subsequently converted to glass-ceramics by a controlled nucleation and crystallization process. Glass materials were obtained by melt at 1500ºC and quenched in cold water. The powder materials were made by milling and spin coating. The powders were applied on the 430 stainless steel interconnector material, and heat treatment was carried out. The interface characteristics between the glass-ceramic layer and interconnector were investigated by using X-ray diffraction analysis (XRD) and scanning electron microscopy (SEM). The results showed that the basalt base glass-ceramic sealant material exhibited promising properties to use for SOFC.

In this study, machinable glass-ceramics were produced from vermiculite and K2CO3, SiO2, Al2O3 and MgF2 as additives by melting process. The starting materials were mixed together and milled in a mill with alumina ball for 2 h. The mixed powders were melted by aluminum crucible at 1500• C. The melted glass was cast into graphite mold, and then it was exposed to crystallization heat treatment for glass-ceramic transformation. The glass-ceramic samples were characterized with X-ray diffraction analysis, scanning electron microscopy, mechanical tests such as hardness, fracture toughness and machinability test. The results indicate that machinability properties can be obtained from vermiculite based glass-ceramic with some additives.

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Abstract.In the present work, the radiation attenuation properties of Aluminum titanate (Al 2 TiO 5 )-Spinel (MgAl 2 O 4 ) ceramics composites were investigated. Al 2 TiO 5 -MgAl 2 O 4 ceramics composites which have different Al 2 TiO 5 percentages (0%, 5% and 10%) were produced and performed against gamma sources. Cs-137 and Co-60 were used as gamma radiation sources. Transmission technique was used in the experiments. The linear and mass attenuation coefficients of the samples were carried out for gamma radiation sources. The experimental results were compared with the theoretical mass attenuation coefficients which were calculated by using XCOM computer code. Increasing Al 2 TiO 5 percentage in the Aluminum titanate/ Spinel ceramics composites causes the higher linear and mass attenuation coefficients of the composites against Cs-137 and Co-60 gamma radioisotopes. Therefore Also theoretical mass attenuation coefficients are compatible with the experimental results. In conclusion, increasing the Aluminum titanate ratio in the Al 2 TiO 5 -MgAl 2 O 4 ceramics composites increases the gamma shielding property of the Al 2 TiO 5 -MgAl 2 O 4 ceramics for nuclear shielding applications.

Sıhhi gereç ürünleri bir banyo veya tuvalet içine yerleştirilmiş klozetler, lavabolar, ayaklıklar, pisuarlar ve küvetler gibi eşyaları tanımlamak için kullanılan bir terimdir. Çok parlak, leke tutmaz yüzeyleri hem banyo hem de mutfaklarda kullanım için idealdir. Hidromika grubundan olan bir mineral vermikülit, 300 ℃'nin üzerinde ısıtıldığında genleştirilmiş vermiküllit oluşur. Genleştirilmiş vermikülit, benzersiz özellikleri, düşük kütle yoğunluğu, düşük termal iletkenliği, nispeten yüksek erime noktası, kimyasal kararlılığı, dayanıklılığı ve çevre güvenliği nedeniyle ısı yalıtım malzemeleri için dolgu maddesi olarak kullanılabilir. Bu çalışmada, Yıldızeli/Sivas bölgesinden elde edilen vermikülitin sıhhi gereç ürünlerinin bünye özelliklerine etkisi araştırılmıştır. Bu çalışmada kullanılan malzemeler kalsine vermikülit, kuvars, kil, kaolen ve feldspattır. Hazırlanan sıhhi gereç bünyeleri ağırlıkça %0, 10 ve 20, 1050 ℃'de 1 saat kalsine edilmiş vermikülit ilave edilerek bünye kompozisyonları oluşturulmuştur. Numuneler kuru pres ile şekillendirildikten sonra sinterlenmiştir. Sinterlenen numunelere fiziksel ve mekanik testler uygulanmıştır. Vermikülit katkılı numunelerin özellikleri başarıyla geliştirilmiş ve optimum parametreler açıkça gösterilmiştir. Elde edilen sonuçlara göre vermikülit katkısı sonucu su emme ve porozite değerleri azalmış, bulk yoğunluk ve pişme küçülmesi değerleri artmıştır. Vermikülit katkısı sonucu mekanik olarak sertlikte ve 3 nokta eğme mukavemetinde de iyileşme gözlenmiştir.