Ceramic Pieces Research Articles

Ceramics for Building Structures Made from Contaminated Soils: A Fuzzy Logic Intelligence Approach to Circular Mining

Soils contaminated by mining activities are a major environmental concern, and to avoid this type of environmental impact, carrying out high-cost processes is necessary. For this reason, a solution is proposed in this study in order to eliminate the soils contaminated by mining activities and, in turn, prevent the soil’s contaminating elements from causing harm. All this is achieved by using contaminated soils as raw materials for the production of ceramics for bricks. For this purpose, the materials were initially characterized physically and chemically, and different ceramic test pieces were manufactured with different percentages of clay and contaminated soil, subsequently determining the physical properties and the leaching of toxic elements. In this way, it was possible to evaluate, via innovative data mining and fuzzy logic techniques, the influence of the contaminated soil's contribution on the properties of ceramics. Based on this, it was possible to affirm that the contaminated soil incorporation negatively affects the physical properties of ceramics as well as the leaching of polluting elements. The ceramic formed by contaminated soil and clay has a lower compressive strength, and it is associated with lower linear shrinkage and lower density, as well as higher porosity and cold-water absorption. However, the addition of different percentages of contaminated soil (up to 70%) to clay created a ceramic that complied with regulation restrictions. Therefore, it was possible to obtain a sustainable material that eliminates environmental problems at a lower cost and that fits within the new circular mining concept thanks to fuzzy logic techniques.

Chelating agents for the removal of calcareous deposits from archaeological ceramic materials. Compositional evaluation after immersion and physical gel application methods

The removal of calcareous deposits from archaeological ceramics is a very normal conservation-restoration treatment. Among the products used, chelating agents are quite common, including ethylenediaminetetraacetic acid salts (EDTA) (Berducou in La Conservation en archéologie: méthodes et pratique de la conservation-restauration des vestiges archéologiques, Masson, Paris, 1990; Buys and Oakley The conservation and restoration of ceramics, Butterworth-Heinemann, Oxford, 1993; Crisci et al. in Appl Phys A Mater Sci Process, 2010. https://doi.org/10.1155/2009/893528). Nevertheless, some studies have proved that they can cause damages on the ceramic pieces, regarding changes in their composition, such as dissolution of calcareous components and metallic oxides leaching (Gibson in Stud Conserv, 1971. https://doi.org/10.1155/2009/893528; Fernández and Seva Sautuola in Rev del Inst Prehist y Arqueol 9:471–982, 2003). As a consequence, their artistic values might also change. In spite of that, these products are nowadays still in use, meaning that the treatments might be changing the information that archaeological ceramics carry. However, from the 80 s onwards a more secure alternative to direct application methods based on thickening agents was developed. With the aim of analysing the degradation mechanisms that may take place after the cleaning treatments’ application, ceramic specimens with artificial calcareous deposits (Sáenz-Martínez et al. in Eur Phys J Plus 136:798, 2021) were treated with a low-concentrated solution of EDTA tetrasodium salt applied by immersion and thickened with xanthan gum powder (Vanzan® NF-C). Finally, the products from the cleaning treatments were neutralised, respectively, by immersion and by rinsing with deionized water. The composition of the ceramic samples was established before the growth of calcareous deposits and after the treatments, in order to determine their effectiveness and safety. According to the results, EDTA salt treatments, both by immersion and thickened, were effective regarding the removal of the calcareous deposits and did not modify the elemental and mineralogical original composition of the specimens (XRF, XRPD, TG-DSC). In addition, no gel residues were detected by FTIR-ATR.

Exploration of machining parameters by using Taguchi technique on MAAJDM

In this investigation non conventional machine is used to drill a ceramic composite work piece with given input parameters abrasive particles (SiC) are combined with gas in a mixing chamber the size of the abrasive particles is 30 µm and these particles are impinged targeted surface on the work piece with high velocity. An experiment was carried out in accordance with Taguchi's design of experiments in order to determine the signal-to-noise ratio and prediction values of 27 experiments. Four input parameters were used to carry out the experiment on an abrasive air jet drilling machine. We ran one experiment for each orthogonal array combination, and using ANOVA we discovered that the process parameters have a significant influence on kerf. According to the ANOVA, the input parameter standoff distance has the greatest impact on the kerf, followed by air pressure, abrasive flow rate, and finally specimen type. In this work, the investigation brings as per L27 orthogonal array (OA) by varying Pressure, Standoff distance, Abrasive Flow Rate, and percentage of reinforcement into matrix material respectively.

Sintering and Crystallization Intensifiers for Production of Ceramic Paving Blocks by Vibropressing Technology

The article presents the results of research on application of sintering and crystallization initiators based on a composition of blast-furnace granulated slag and glass wastes in the ceramic masses for production of ceramic paving blocks by vibro-pressing. The leading role of sintering and crystallization initiators in assuring the strong and dense structure of ceramic pieces was updated. The main laws of changes in physical and mechanical properties of ceramic paving stone samples depending on the amount of sintering and crystallization initiators in the burning temperature range 950–1000 °C have been established. It was determined that the availability of finely dispersed glass powder (fraction less than 0.1 mm) as a component of crystallization sintering initiators contributes to early emergence of liquid phase in the ceramic mass, as softening temperature of glass powder begins already at 720–750 °C. According to the results of X-ray phase and electron microscopic analysis it was determined that crystallization of low-temperature form of ß-wollastonite (CaSiO3) is observed in the samples burnt at the temperature range of 950–1000 °C. It was proved that the availability of ß-wollastonite in the ceramic mass serves as a reinforcing component. It has been established that high strength values are achieved in those compositions where ß-wollastonite crystallization in the burning products is the highest. As a result of scientific and experimental work the feasibility of producing the ceramic paving stones by vibropressing containing sintering and crystallization initiators that meet the requirements of quality, aesthetics, environmental friendliness, resource- and energy-saving was proved.

“Ceramic road” – seen from village communal house carving art

Inheriting the essence of traditional art has always been considered the fulcrum for the development of modern art. Pottery Road is the sketch for viewers of artworks re-enacting important historical events of the country, scenic spots along with the quintessence of traditional pottery villages. The image of “Ceramic Road” in close relationship with regions in the country is also simulated by a 100m-long ceramic painting piece, using ceramic coated with a colored glaze, fired at a temperature of 1,200 degrees Celsius, ensuring durability stands firm against time. The ceramic path with the application of traditional artistic elements, although not really a creative application, has also achieved certain successes.

Embedding ceramic components in metal structures with hybrid directed energy deposition

The combined benefit of both additive and subtractive manufacturing within the same gantry system enables hybrid directed energy deposition to create complex geometries with smooth surface finish and superior dimensional accuracy. Moreover, with layer-by-layer access to the structure during both the addition and subtraction of material, the insertion of components is now possible, assuming the components can survive the high temperatures associated with the subsequent metal deposition. Ceramic inserts are of interest for a variety of reasons including (1) to create complex interwoven ductile/brittle composites for ballistics or high-temperature applications or (2) to integrate high-temperature strain or temperature sensors protected within ceramic substrate subsumed into a larger metal structure. In this work, stainless steel substrates were machined to create an internal cavity for the insertion of a ceramic component. During the investigation of several different over-the-ceramic deposition strategies, components were inserted, and different process sequences were allowed to continue to envelop the inserted ceramic with varying success. Unmelted powder was used to serve both as a thermal buffer and to provide a flush surface upon which the laser cladding could continue. Subsequent depositions were attempted with both dry and wet powder (addition of machining coolant to wet). The wet powder has previously been demonstrated to not significantly impact the mechanical properties of a final structure and provided a thermal barrier to protect the ceramic piece from the extreme temperatures of the final metal deposition. The wetting of the powder provided stability and minimized displacement caused by the powder flow from the laser cladding head. Finally, the use of an oblique angle for laser cladding allowed for the redirection of some fraction of the introduced thermal energy away from the ceramic component and, consequently, improved the survival of the ceramic inserts. With this combination of techniques, ceramic inserts survived full embedding within a 3D-printed stainless steel structure.

Procena upotrebe otpada pri sečenju bazalta u bojenju različitih kompozicija keramičkih glazura

Color effects in ceramic glazes play a decisive role in the aesthetic and attractiveness of ceramic pieces. The colorants used in glazes interact with the ceramic materials during the firing process, resulting in a wide range of fascinating colors and effects. Due to the natural properties of basalt such as high compressive strength and wear resistance, this natural volcanic rock is attracting a lot of attention when used in ceramic production processes. The aim of this study is to evaluate the effects of basalt cutting waste (BCW) obtained from a stone company in Kayseri, Turkey, on the color effect of ceramic glazes in combination with different frits. For this purpose, glazes were prepared in which BCW was incorporated in different weight percentages of 0-20 % together with different frits. The glazes were characterized by analyzing chemical, phase, and thermal behavior of BCW using X-ray fluorescence (XRF), X-ray diffraction (XRD), and thermal microscopy, respectively. The prepared glazes were then applied to engobed wall tiles and fired at a temperature of 1,200 °C in a laboratory furnace. After firing, the glazed surfaces were subjected to color analysis, while the phase composition was analyzed by XRD. The microstructure analysis was carried out using electron microscopy (SEM/EDS). Increasing the proportion of BCW in the glaze compositions resulted in a change of the color of the finished surfaces from cream to yellow-beige tones. This study sheds light on the potential use of BCW as a coloring agent in the production of ceramic glazes.

Robotic Manipulation in the Ceramic Industry

Robotic manipulation, an area inside the field of industrial automation and robotics, consists of using a robotic arm to guide and grasp a desired object through actuators such as a vacuum or fingers, among others. Some objects, such as fragile ceramic pieces, require special attention to the force and the gripping method exerted on them. For this purpose, two grippers were developed, where one of them is a rotary vacuum gripper and the other is an impact gripper with three fingers, each one equipped with a load sensor capable of evaluating the values of load exerted by the grip actuators onto the object to be manipulated. The vacuum gripper was developed for the purpose of glazing a coffee saucer and the gripper with three fingers was developed for the purpose of polishing a coffee cup. Being that the impact gripper with sensorial feedback reacts to the excess and lack of grip force exerted, both these grippers were developed with success, handling with ease the ceramic pieces proposed.

THE CAESAREA GERMANICIA (?) OF ARCHEOGEOPHYSICAL INVESTIGATIONS

The remains unearthed in the Dulkadiroğlu district, one of the central districts of Kahramanmaraş, are thought to belong to Caesarea Germanicia, which was founded in the Roman Period. Research and excavations carried out by the Kahramanmaraş Museum and us in the region have revealed that the spread of archaeological cultural remains is more than 150 hectares. Although the concentration of Roman Period cultural remains in the research and excavations was remarkable, the discovery of Byzantine, Seljuk, and Ottoman Period ceramic pieces indicates an uninterrupted settlement in the research area for centuries. However, as can be seen in the images, the dense residential texture in the region is one of the biggest obstacles to archaeological research and excavations. Because, in order to carry out archaeological excavations of the identified structures, expropriations are required. However, the expropriation period covers an average of 2-4 years, which makes it difficult to conduct scientific research. Archeogeophysical methods provide information about the location, depth, and dimensions of the archaeological remains by applying them from the surface, without causing any damage to the archaeological remains sought. In this context, Ground Penetrating Radar (GPR) measurements were carried out to determine the quality of the mosaic-based structure on 445 layout, which were previously unearthed through illegal excavations in 2019, and the parcels on which it extends. GPR was carried out along 6 profiles. The obtained results were compared both with each other and with the existing surface conditions, and GPR depth maps were created. When the GPR depth sections were examined, 4 important reflections were found. It has been interpreted that 3 of these reflections belong to the archaeological building remains and 1 of them originates from a metal material (pipe). It was determined that the depth of the archaeological remains identified in the GPR sections started at a depth of approximately 20 cm. As a result of the excavation, it was seen that the reflections determined in the GPR sections belonged to the wall remains and metal pipe. As a result of archaeological excavations, it was determined that the GPR reflections belong to the remains of the walls of the Villa Rustica of the Early Byzantine Period or a Roman bath, as well as a metal pipe. In the measurements of the ground radar, it was determined that other walls cut the building walls in parallel. As a result of archaeological excavations, it was understood that these walls were made of rubble stone with mud additives. It was discovered during archaeological excavations and was discovered in the 11th-13th centuries AD. One of the ceramic fragments indicates that this structure was used again in the Middle Byzantine Period.

Development of Ternary Inorganic Binder System for Manufacturing High-Functional Ceramic Molds and Core

In existing ceramic mold manufacturing processes, inorganic binder systems (Si-Na, two-component system) are applied to ensure the effective firing strength of the ceramic mold and core. These inorganic binder systems makes it possible to manufacture a ceramic mold and core with high dimensional stability and effective strength. However, as in general sand casting processes, when molten metal is injected at room temperature, there is a limit to the production of thin or complex castings due to reduced fluidity caused by the rapid cooling of the molten metal. In addition, because sodium silicate generated through the vitrification reaction of the inorganic binder is converted into a liquid phase at a temperature of 1,000 °C. or higher, it is somewhat difficult to manufacture parts through high-temperature casting. Therefore, in this study, a high-strength ceramic mold and core test piece with effective strength at high temperature was produced by applying a Si-Na-Ti three-component inorganic binder. The starting particles were coated with binary and ternary inorganic binders and mixed with an organic binder to prepare a molded body, and then heat-treated at 1,000/1,350/1,500 °C to prepare a fired body. In the sample where the two-component inorganic binder was applied, the glass was liquefied at a temperature of 1,000 °C or higher, and the strength decreased. However, the firing strength of the ceramic mold sample containing the three-component inorganic binder was improved, and it was confirmed that it was possible to manufacture a ceramic mold and core via high temperature casting.

THE CREATION OF “REPURPOSING” CERAMIC USING ROOF TILES WASTE

There was a lot of used roof tile discovered throughout the village. However, the community did not turn it into usable items. The roof tile waste motivated us to turn it into artwork. This artistic research focused on the production of repurposing ceramic pieces utilizing roof tile waste materials. This creative study made use of the experimentation, reflection, and formation phases of Dharsono's artistic creation approach. This artistic creation process resulted in a jug of art entitled "Wanawarih." This artwork is full of symbolic expression values about the trilogy of vitality, namely forest preservation, water function maintenance, and earth manifestation

A Linear Ultrasonic Motor Based on Coupling Vibration Mode

A coupled linear ultrasonic motor (LUSM) based on an eccentric constraint was proposed. Two pieces of oblique piezoelectric ceramics were arranged at each end of the elastomer, and the polarization direction of the ceramics was vertically upward. Using the tilting characteristics of the piezoelectric ceramics, the two ends of the fixed piezoelectric ceramics formed an eccentric restraint on the motor, providing conditions for the motor to generate coupled modes. When the elastomer of the motor generated the coupling vibration, the motion trajectories of the driving feet ends were oblique straight lines, and the oblique straight-line motion trajectories of the upper and lower driving feet ends were in opposite directions, driving the upper and lower sliders to run simultaneously. The stator parameters were optimized by using ANSYS to obtain larger amplitudes for the ends of the driving feet in both X and Z directions. The structure and operation principle of the motor are explained in detail. A prototype was fabricated to study the arrangement scheme with fixed constraints at the ends of the motor. The frequency-velocity characteristics, voltage-velocity characteristics, and mechanical characteristics of the motor were tested. The no-load speed and maximum output power were measured to be 45.9 mm/s and 3.24 mW.

Alanya Müzesi’nden Urartu, Lydia Ve Phrgia Dönemleri’ne Ait Bir Grup Demir Çağı Çanak Çömlek Ve Altlıkları Üzerine Değerlendirme

Thanks to its geopolitical and strategic location, Anatolia has hosted numerous rich cultures from the prehistoric eras up until today. While the political conflicts and the socio-economic changes that these cultures experienced throughout history caused the end of an era, they also laid the groundwork for the beginning of a new era. As a matter of fact, this cultural cycle can also be seen in the collapse of the Great Hittite Empire in 1190 BC and the Iron Ages that began after the collapse. Blended with numerous cultures from Urartian’s in the east, Phrygians and Lydian’s in the west, Late Hittite Empires in the southeast to Middle Assyrian Empire and Neo-Assyrian Empire, Iron Age is dated between 1190-330 BC. Pottery findings belonging to the 850-year period, which consists of the Middle and Late Iron Ages, constitute the subject of our study. In this context, 27 pieces of ceramics, most of which were brought to the Museum of Anatolian Civilizations by purchasing from Burdur and Isparta regions and from there to Alanya Museum, were examined. Each ceramic was classified chronologically and typologically within its own period and was attempted to be introduced scientifically by comparing it with similar samples

Andriake’den Oinophoros Cinsi İki Kabartmalı Seramik ve Düşündürdükleri

Three pieces of embossed ceramic pieces from the oinophoros group unearthed during the excavations in the Port Buildings and ornamentation repertoire of these vessels, which are generally produced using two or more female molds, there are many scenes such as different mythological events, daily life, pastoral and still life expressions, chariot races and gladiator fights. It was determined that the oinophoros were first produced in Knidos during the Augustus Period. Apart from Knidos, it was understood that they were produced in Pergamon in the middle of the 1st century AD and in Iasos in the second half of the 2nd century AD. The oinophoros group ceramics found in Andriake belong to two different forms as phiale/patera and skyphos. As decoration, there are still life depictions with Eros in vintage associated with the Dionysus cult. Andriake samples are dated to the 1-2 century AD according to the typological analogy. It is seen that the Andriake oinophoros group ceramics are in close relationship with the Knidos samples in terms of similar examples, decoration style, clay and lining features. This situation provides important information about the distribution of oinophoros ceramics on the Lycian coasts and commercial connections between cities. It also contains clues as to the centuries and the extent of Myra's commercial connection with Knidos through the port of Andriake.

Effects of plaster to water ratio on physical and mechanical properties of ceramic pieces produced by the slip casting process

In the slip casting process, the relationship between the amount of plaster and water used in the production of molds influences the production of ceramic materials, because the higher the water content in the mixture, the lower the mechanical strength of the mold and higher the water absorption rate. In order to evaluate the influence of the variation in the plaster/water (P/W) ratio in the production of ceramic pieces, plaster molds with P/W ratios of 2.0, 1.67, 1.43, and 1.25 (100 parts of plaster/50, 60, 70, and 80 parts of water by weight) were manufactured and used in the production of ceramic pieces. It was found that the fluidity, density, flexural and compressive strength of the molds decreased with the increase of water content. For pieces sintered at 1050 °C, higher density and lower porosity were observed for ceramic materials obtained with molds with higher plaster/water ratios.

Synthesis and robocasting of YAG xerogel: one-step conversion of ceramics

An optimized sol–gel protocol was carried out to produce an yttrium aluminum garnet (YAG) xerogel from aluminum alkoxide and an yttrium salt on a semi-pilot scale. This xerogel was successfully used without prior pyrolysis as a solid load with the aid of additives in the preparation of pastes. Thermal treatment of the green bodies, obtained by robocasting of the paste, led to cohesive single-phase YAG ceramics. Manufacturing ceramic pieces by additive methods will allow shaping complex forms, while the single step conversion/consolidation would simplify the technological process, reducing global energy costs. Since YAG possesses high strength and good creep behavior at high temperatures, these refractory pieces could replace the metal alloys used in turbine blades for deep space exploration. Structural, thermal and chemical characterizations were performed on xerogel powders, pastes, and YAG ceramics.

The behavior of different clays subjected to a fast-drying cycle for traditional ceramic manufacturing

Studies have been widely carried out on drying techniques and equipment. The behavior of clays subjected to drying stages requires further research. This study aims to evaluate the behavior of the clay ceramic body during the different stages of the drying cycle and match the characteristics of the raw materials with the final quality of the pieces. In this work, the behavior of three different clays in terms of drying performance was studied. The clays were selected, and their chemical, mineralogical, and particle size characteristics were measured. The mixture design (DoE) developed 10 formulations and was processed through vacuum extrusion. The samples were subjected to forced drying cycles of 180 min by varying the temperature from 30 to 90 °C and air speed from 1.5 to 4.0 m/s. At the end of the cycle, the retraction was a determining factor for the crack probability indicator, where formulations that obtained ∼10% retraction in the dry zone showed losses >25%. On the other hand, it is could be stated that claystone assists the drying process of the ceramic piece, minimizing losses. The drying sensitivity coefficient (k-factor) presented values that reproduce the number of losses during drying, proving to be a valid tool to relate clay properties, drying conditions, and losses in this process. In this case, drying process losses >25% were observed when the k-factor was from 1.6.

Research on Digital Representation of Xiaopi Kiln Ceramic Art Design Based on Computer-Aided Technology and IoT Network

The development of digital information technology progresses as time passes. Each art category has also experienced its own development and changes. With the rapid advancement of information technology, the traditional ceramic skills left by the older generation can no longer conform to the trend of the times. The digital intervention in traditional ceramic art publishing provides more development space and development mode for the industry and traditional ceramic art publications in terms of dissemination form and dissemination effect. In the current ceramic design, contemporary ceramic art design also has a new development trend of integrating with technology and other art categories. Compared with the traditional ceramic art that pursues craftsmanship, contemporary ceramic art design is more about adding creators’ emotional concepts. In terms of material selection, craftsmanship, and aesthetics, there are big progress. The IoT network assisted digital representation of the Xiaopi kiln ceramic art design discussed in this paper is based on the technical conditions of computer-aided technology. It has the advantages of simple structure, being convenient for continuous cutting and shaping of ceramic pieces, high efficiency, numerical control without manual operation, and ease of use.

Valorisation of firewood ash waste for fired clay ceramics production

The objective of this work was to investigate the valorisation of firewood ash waste as an alternative raw material for clay ceramic production, through replacement of industrial plastic clay up to 20 wt.%. For this purpose, clay ceramic pieces were produced by uniaxial pressing and fired at temperatures ranging from 800 °C to 1100 °C. The technical properties of the fired clay ceramic pieces have been determined. It was found that the technical properties of the clay ceramic pieces depend on the firewood ash waste amount and firing temperature. The fired pieces incorporated with up to 20 wt.% of firewood ash waste showed a water absorption level of 9.90 to 16.62 % and flexural strength of 4.12 to 12.02 MPa, indicating their conformity for clay ceramic production (bricks and roofing tiles). Obtained results confirmed the feasibility of valorisation of firewood ash waste in the production of fired clay ceramics.

Starting Point of the Arabic-Andalusi Influence in Gaudi’s Ornamental Ceramic

Between 1884 and 1887, Antoni Gaudí built two rather modest constructions for his patron, Eusebi Güell: a stable for the horses and a porterhouse for his country house in Les Corts. In these constructions, he makes an important step in relation to his previous works, El Capricho (Comillas, Santander) and the Casa Vicenç (Barcelona). The tiles used in both, featuring lines of color that contrast with the brick and stone, derive from an original system of using ceramic, the trencadís. He takes as a reference point the Arabic or Mudejar building system to embed ceramic pieces in the walls and in the coronation railings of the buildings, but adds a brilliant contribution by converting it into “broken” ceramics. We call this ornamental resource trencadís, since trencar means broken in Catalan. This technique is one of Gaudí’s more significant decorative choices with brilliant examples of this being the façade of Casa Batlló and the dragon and banc-balustrade in Park Güell.