Materials analysis of the TITAN-I reversed-field-pinch fusion power core

Synthesis and characterization of precursors for group II metal aluminates

“…This supports the idea that the TEA encapsulation (see Eqn [4]) is required for solubility. Both routes (stepwise and one-pot) provide the same precursors, as was proved by thermogravimetric and mass spectral analyses.…”

“…The Group II metal aluminates (MAl 2 O 4 , M = Mg, Ca, Ba, Sr) are one important class of mixed-cation oxide ceramics with widespread applications. 3,4 Strontium and barium aluminates are used as catalyst supports 5 and they make good luminophores when doped with appropriate transition-metal ions. 2 Spinel (MgAl 2 O 4 ) is used as a refractory and insulating material.…”

The low temperature preparation of nanocrystalline MgAl2O4 spinel by citrate sol–gel process

“…[2]. It is also ideal for use as insulating materials [3], humidity sensors [4], and optical devices [5]. In recent years, several types of wet-chemical techniques have been successfully used for the preparation of pure spinel powders at relatively low temperatures, such as precipitation [6,7], sol -gel of metal alkoxides [8], spray-drying [9], freeze-drying [10], modified Pechini process [11], and combustion synthesis [12].…”

Magnesium aluminate planar waveguides fabricated by C-ion implantation with different energies and fluences

“…This structural similarity could explain the reason of the high hardness typical of this material [7]. Because of its good resistance to radiation-induced swelling and strength degradation, magnesium aluminate is a potential fusion reactor power core insulating material [6]. However, this material has a higher IR absorption edge and required light transmission in the wavelength range of 2-5.5 lm and is now being replaced by ZnS, sapphire, AION, traditional alumina, and lanthanum niobate ceramics in applications including laser ignitors, windows for UV lithography, barcode scanners, spacecraft, watches, and night-vision systems [2,[8][9][10][11][12][13][14].…”

“…Magnesium aluminate, MgAl 2 O 4 , is a typical spinel material with an isotropic cubic structure that exhibits numerous important properties, including a high melting point (2135°C), which enables its use as an ultrahigh temperature material, high mechanical strength even at high temperature, high electrical resistivity, wide energy band gap, transparency from the near-UV (ultraviolet) to the mid-IR (infra-red) regime, high resistance against chemical attack, high thermal shock resistance, low thermal expansion coefficient, high hardness (16 GPa), low density (3.58 g/cm 3 ) that is easier to polish and a lower production cost [1][2][3][4][5][6]. Because the structure of magnesium aluminate is based on the structure of diamond and its general composition is AB 2 O 4 , the positions of the A ions are nearly the same as the positions occupied by carbon atoms in the diamond structure; the arrangements of the other ions in the structure are identical to the symmetry of the diamond structure.…”