Fractional crystallization
method of refining substances based on differences in solubility.
mixture of two or more substances in solution is allowed to crystallize, for example by allowing the temperature of the solution to decrease, the precipitate will contain more of the least soluble substance
Solubility :
the property of a solid, liquid, or gaseous chemical substance called solu
materials, Bi2Te3, SiGe, and single-crystal silicon, at room temperature
The only different between passive and active solid-state cooling is the utilization of a thermoelectric module (TEM) sandwiched between the processor and the passive or active heat sink.
• Thermal Design Power(TDP) is method of cooling for chip, but it
reflects the uneven power distribution, and also m
- Science : materials development, including creation of an advanced catalyst, a highly stable electrolyte, and efficient stabilization of the lithium anode metal.
- Engineering : development of high-porosity gas diffusion electrodes, ways of deopositing the catalyst onto the cathode and developing a membrane to prevent oxygen crossover to the lithium anode.
General theoretical sintering temperature is 70% of the melting point
- ZrO2 : Tm – 2700 ℃ sintering temperature - 1890 ℃
- Al2O3 : Tm - 2050 ℃ sintering temperature - 1435 ℃
The actual sintering temperature
- ZrO2 : 1400 ℃
- Al2O3 : 1650 ℃
The alumina has Corundum structure , this is stable transformation of a-Al2O3
rhombohedral
T
Linked to purchase
intention Merchandise
Colors
Presentation style
Awareness of fixtures
Path finding
Sensory qualities of materials
Lighting
It makes determine purchase
4 times more likely.
Data Collection techniques
semi-structured interviews enable the "seeking of insight“
semi-structured interviews were based around the use of visual stimulus material
Se
material price and realistic situation, we made 3.6cm3 acrylic cubic cases.
First, Cut acrylic cubic case for 0.2cm x 3.6cm x 3.6cm size. Cover copper tape on it and elongate copper tape`s tail to connect electrode. Then, cover 3cm x 3cm cut wire mesh on it.Because of the thickness of the wire mesh, the wire mesh paste on silver paste to enhance the electrical conductivity on the side. In the sa
Polymer density can be determined by
measuring the volume and weight of
polymer.
Two different methods are used;
(1) Specific Gravity-Bottle Method
(2) Sink-and-Float Method
Measurement of Density
The mass is normally measured with an appropriate scale or balance.
The volume may be measured directly (from the geometry of the object) or by the displacement of a fluid.
Hyd
Working in the static mode, the bending arises as a consequence of a surface stress change induced by any molecular reaction which takes places on only one of the cantilever surfaces. The induced surface stress change could be positive or negative, depending on the surface deformation generated. The factors and phenomena responsible for this change is today not fully understood due to the complex
Oxidation titration that fixing quantity of reduction material by using permanganate standard solution.
To add permanganate aqueous solution to sample solution contain reduction materials.
To calculation quantity of used permanganate solution.
To calculation quantity of reduction material from molarity of permanganate solution and used volume.
Instruments & Reagents
Instruments : Measu