scholarly journals Influence of flue gas components on the chemical properties of the ceramic materials (Co-)Ce0,8Gd0,2−xPrxO2−δ

2011 ◽  
Vol 18 (7) ◽  
pp. 072005 ◽  
Author(s):  
J Schneider ◽  
Ch Semmler ◽  
Ch Kaps ◽  
F Schulze-Küppers ◽  
S Baumann ◽  
...  
Keyword(s):  
Flue Gas ◽  
Chemical Properties ◽  
Ceramic Materials

Research on the Effect of Repairing Anterior Teeth with All-Ceramic Veneer Based on CT Images

2020 ◽  
Vol 10 (4) ◽  
pp. 940-946
Author(s):  
Shuang Liu ◽  
Hui Yan ◽  
Yuehang Gao
Keyword(s):  
Light Transmission ◽  
Chemical Properties ◽  
Ct Scanning ◽  
Ceramic Materials ◽  
Original Data ◽  
Image Method ◽  
Finite Element Software ◽  
Anterior Teeth ◽  
All Ceramic ◽  
Simulation Results

IPS e.maxPress all-ceramic materials have good physical and chemical properties, biocompatibility, light transmission similar to natural teeth and excellent aesthetic properties, so they are widely used in clinical practice. In this study, the anterior porcelain veneer was made by using IPS e.maxPress hot-pressed casting ceramic under the guidance of DSD software aesthetic design, and its clinical aesthetic repair effect and success rate were evaluated, which provided a useful reference for clinical aesthetic restoration work. The original data was obtained by using the medical image method; the DICOM data obtained by CT scanning was input into the reverse engineering software for image processing and data optimization by using the reverse technique to obtain the real tooth and mandible model. The 3D modeling software is used to establish the implant model and the associated tissue model, and the assembly is completed. The finite element software is introduced, the contact type between the tissues is set, and the clinical simulation results are compared to analyze the simulation results. Practice provides a better surgical solution.

The Ceramist as Chemist - Opportunities for New Materials

1984 ◽  
Vol 32 ◽  
Author(s):  
D. R. Uhlmann ◽  
B.J.J. Zelinski ◽  
G.E. Wnek
Keyword(s):  
Wide Spectrum ◽  
High Surface ◽  
Sol Gel ◽  
High Surface Area ◽  
Glass Ceramics ◽  
Chemical Properties ◽  
Ceramic Materials ◽  
Process Technology ◽  
Chemical Homogeneity ◽  
And Chemical Properties

ABSTRACTThe use of sol-gel techniques to prepare glasses and crystalline ceramics offers outstanding opportunity for breakthroughs in technology. The areas of particular promise include novel glasses; crystallineceramics with exceptional microstructures; coatings for modification of electrical, optical, mechanical and chemical properties; porous media with high surface area and tailored chemistry; ceramic powders with high chemical homogeneity and narrow distributions of particle size; matrix materials in ceramicceramic composites; and a wide spectrum of specialty ceramic materials, ranging from abrasives and fibers to glass ceramics and films. Opportunities in each of these areas will be discussed and related to the advances in understanding and process technology required for their achievement. The theses will be advanced that creative chemistry provides the key to many of these advances, that ceramists simply MUST learn more chemistry, but that we dare not rest from our labors when the chemistry is done.

New Construction Materials Based on Automobile Construction Sludge

2013 ◽  
Vol 346 ◽  
pp. 15-21
Author(s):  
Vsévolod A. Mymrin ◽  
Rodrigo E. Catai ◽  
Elena V. Zelinskaya ◽  
Natalia A. Tolmacheva
Keyword(s):  
Construction Materials ◽  
Glass Ceramics ◽  
Chemical Properties ◽  
Ceramic Materials ◽  
Industrial Wastes ◽  
Glass Waste ◽  
Financial Investment ◽  
Before And After ◽  
New Construction ◽  
X Ray Background

This paper is devoted to the development of valuable new construction materials based on various ecologically burdensome galvanic wastes, namely industrial sludge from the RENAULT plant and metal cleaning glass waste. The only natural component used is local clay. Both of the wastes need significant financial investment and efforts for neutralization and subsequent disposal while they can be recycled into glass-ceramics or red ceramics (tiles, bricks, blocks, etc.). Mechanical properties of the ceramics of various compositions are as follows: flexion resistances are 4.8-9.2, 7.6-11.5 and 11.1-14.9 MPa (after calcination at 800°C, 850°C and 900°C, respectively); the dilatation coefficient values are normally 6.6 to 9.5% (up to 10% for certain materials); the water absorption values are between 19.7 and 23.9%. These values meet the Brazilian standards for ceramics production. Physicochemical interactions of initial components and new materials structure formation processes have been studied. The XRD data show the formation of new minerals in the process of baking: Na-Anortite (Ca,Na)(Si,Al)4O8, Thenardite Na2SO4, Mullite Al6Si2O13, Tamarugite NaAl (SO4)2 6H2O. Only two minerals are identified both before and after baking: Quartz SiO2 and Hematite Fe2O3. High X-ray background clearly visible on the XRD-pattern is an evidence of a highly amorphous glassy structure resulting from founding processes during the mixtures heating. The SEM and EDS studies of the ceramics strongly confirm the XRD results demonstrating fields of almost glassy morphology within the new material. These new-crystalline and new-amorphous structures can explain all the mechanical and chemical properties of the ceramic materials developed. Leaching and solubility studies of the new ceramics with Atom Absorption Analysis demonstrate that a great excess of heavy metals (Sn, Zn and Ni) from the industrial wastes is decreased in the baked ceramics achieving levels that meet Brazilian sanitary standards.

Fracture Mechanics Analysis of GI All-Ceramic Crowns

2013 ◽  
Vol 750-752 ◽  
pp. 529-532
Author(s):  
Cheng Fan
Keyword(s):  
Clinical Application ◽  
Process Analysis ◽  
Failure Process ◽  
Chemical Properties ◽  
Ceramic Materials ◽  
All Ceramic ◽  
Ceramic Crowns ◽  
Analysis System ◽  
Physical And Chemical ◽  
Ceramic Crown

Dental ceramic materials have approximate color and translucency with natural tooth, which is unmatched by other restorative materials. Because of its beautiful appearance, good physical and chemical properties, all-ceramic crown restorations are more widely used., However, due to the brittleness of ceramics and the stress mismatch between different materials, dropping or fracture phenomenon of porcelain veneer is often occurred in clinical application during the service period of all-ceramic crowns. The porcelain veneer failure mechanism is still not very clear, in this paper, the force performance of all-ceramic crowns is analyzed using the RFPA (realistic failure process analysis) system. The crack initiation, propagation and failure process of all-ceramic crown can be clearly observed and the research results provide guidance for clinical application

scholarly journals Properties of glasses in the system BaO–B2O3–SiO2–xAl2O3 (x=0; 5; 10 mol.%)

2021 ◽  
pp. 83-89
Author(s):  
Yu.S. Hordieiev ◽  
◽  
E.V. Karasik ◽  
А.A. Amelina ◽  
◽  
...  
Keyword(s):  
Chemical Composition ◽  
Glass Ceramic ◽  
Glass Formation ◽  
Linear Thermal Expansion ◽  
Chemical Properties ◽  
Ceramic Materials ◽  
Heat Resistant ◽  
Glass Ceramic Materials ◽  
Wide Range ◽  
Physical And Chemical

This article shows the prospect of the system BaO–Al2O3–B2O3–SiO2 as the basis of vitreous and glass ceramic materials, which are widely used in rocket production for high-temperature protection of heat resistant alloys, in the power industry for sealing solid oxide fuel cells, and in the production of heat resistant glass ceramic materials. We examined the conditions of glass formation and properties of glasses with the following content of components (mol.%): BaO 30–70, B2O3 10–50, SiO2 20–60, and Al2O3 0–10. We established experimentally that the physical and chemical properties of glass, depending on its chemical composition, vary within the following limits: coefficient of linear thermal expansion of (71–122)10–7 К–1; glass transition temperature of 500–6500С; dilatometric softening point of 540–6700С; and density of 3.20–4.21 g cm–3. The volume resistivity of the studied glasses is within 1011–1013 Ohmcm at the temperature of 1500С. Generalization of the dependences of glass properties on their chemical composition was carried out with the use of the additive equations, for which the partial contributions of oxides to the values of the corresponding properties were determined by experimental and statistical methods. The established patterns of influence of components and conditions of glass formation on the physical and chemical characteristics of glasses allows implementing the process of designing of a wide range of glass compositions with the complex of specified properties in order to solve the tasks of their practical use.

Role of liquid sintering aids in the synthesis of SiAlON materials

2021 ◽  
Vol 25 (7) ◽  
pp. 93-97
Author(s):  
B. Mandal ◽  
T. Das
Keyword(s):  
Coming Out ◽  
Chemical Properties ◽  
Ceramic Materials ◽  
Lower Amount ◽  
Oxide Ceramic ◽  
Potential Candidate ◽  
Sintering Aid ◽  
Liquid Sintering ◽  
And Chemical Properties

The synthesis of dense sintered sialon with external additives selected from the system Y2O3-AlN-SiO2 is described. The highest density (3.21g/cc) was achieved at 1750ºC at 90 min of sintering with 5 wt% additive. Non-oxide ceramic materials are increasingly coming out as a potential candidate in engineering applications and among them, sialon is one of the most important materials. β-Sialon was first to be discovered in this class of compounds. It has an excellent combination of thermal, mechanical and chemical properties. The degree of sialon substitution increased with the amount of liquids, the YSiO2N crystalline phase formed concurrently. Strength degradation occurred above 1000ºC.The fracture toughness of the material sintered with a lower amount of sintering aid remained relatively unchanged to 1200ºC.

Sign in / Sign up

Export Citation Format

Share Document