Technological advances always require us to keep trying to develop the potential of natural resources. One of them is mineral from mining. These minerals will be processed into goods that support human life such as household appliances, industrial equipment and most of them are used as research materials. The use of sintered components is gradually increasing outside the automotive sector as well but there is still great potential for release. Parts produced in powder form serve special functions such as power tools, white goods, appliances, air conditioners, computers, lawn mowers, locks and pumps.
One type of advanced sintering technique of this period was Spark Plasma Sintering. SPS is a technique that can produce solids (bulk) with good mechanical properties such as density and hardness because SPS has a control system such as pressure, temperature, vacuum, chamber and significant sintering time.
In addition, this SPS technique is very easy to do and very effective because the fabrication process is very fast because the heating rate is controlled so that the sintering time can be long.
accelerated. Therefore, the use of advanced sintering techniques of spark plasma sintering as well as the selection of an effective secondary sintering/strengthening additive is required to develop bulk nanoceramics with enhanced properties.
Sintering is a process in which a powder sample is heat-treated with a certain temperature variation with the aim of obtaining a sample in the form of solids or pellets. The purpose of fabricating powder samples into solid samples is to obtain the mechanical properties and also some other characteristics of the sample as needed.
SPS is very efficient when compared to conventional sintering techniques where the fabrication process is required hours or even days. SPS is a sintering technique that belongs to the pressured sintering method and also belongs to the solid compaction technique. Spark Plasma Sintering is one of the most advanced sintering furnaces. With the characteristics of fast sintering and high specimen density, this furnace is mainly used for the sintering of nanophase materials, functionally graded materials, nanoscale thermoelectric materials, rare earth permanent magnets, target materials, nonequilibrium materials and medical implants, etc.
Alumina (Al2O3) is one of the popular ceramic minerals processed from bauxite ore because it has good mechanical properties such as having high hardness and strength values and is also resistant to corrosion.
Alumina with the chemical formula Al2O3 is one of the minerals from bauxite processing which is the largest commodity in the world. The processing of bauxite into alumina is carried out through several long stages, one of which is the Bayer process. Alumina has a unique study to study, because alumina will have different phases when heat treated at a certain temperature. These different phases will determine the crystal structure, microstructure as well as different mechanical properties.
After processing and producing pure alumina, the content of alumina can still be processed to obtain benefits such as being used for refractory applications and advanced ceramics in laboratory ware that are resistant to weathering and oxidation attack.