scholarly journals Optimized two-layer motheye structures for MgAl₂O₄ spinel ceramic windows

OSA Continuum ◽  
2021 ◽  
Author(s):  
Chaoran Tu ◽  
Jonathan Hu ◽  
Curtis Menyuk ◽  
Thomas Carruthers ◽  
Brandon Shaw ◽  
...  
Keyword(s):  
Spinel Ceramic

The Effect of Varied Amounts of LiF Sintering Aid on the Transparency of Alumina Rich Spinel Ceramic with the Composition MgO · 1.5 Al2O3

2012 ◽  
Vol 95 (6) ◽  
pp. 1807-1810 ◽  
Author(s):  
Anthony C. Sutorik ◽  
Gary Gilde ◽  
Christopher Cooper ◽  
Jared Wright ◽  
Corydon Hilton
Keyword(s):  
Sintering Aid ◽  
Spinel Ceramic

Preparation and characterization of porous MgAl2O4 spinel ceramic supports from bauxite and magnesite

2015 ◽  
Vol 41 (6) ◽  
pp. 7374-7380 ◽  
Author(s):  
Feng Wang ◽  
Jianke Ye ◽  
Gang He ◽  
Guanghua Liu ◽  
Zhipeng Xie ◽  
...  
Keyword(s):  
Mgal2o4 Spinel ◽  
Spinel Ceramic

Spectrally selective Cu1.5Mn1.5O4 spinel ceramic pigments for solar thermal applications

RSC Advances ◽  
2016 ◽  
Vol 6 (39) ◽  
pp. 32947-32955 ◽  
Author(s):  
Pengjun Ma ◽  
Qingfen Geng ◽  
Xianghu Gao ◽  
Shengrong Yang ◽  
Gang Liu
Keyword(s):  
Sol Gel ◽  
Cost Effective ◽  
Combustion Method ◽  
Solar Thermal ◽  
Ceramic Pigments ◽  
Spectrally Selective ◽  
Solar Thermal Applications ◽  
Spinel Ceramic

In this work, Cu1.5Mn1.5O4 spinel ceramic pigments have been successfully prepared by a facile and cost-effective sol–gel self-combustion method and annealed at a temperature ranging from 500 °C to 900 °C for 1 h.

Synthesis and characteristics of aluminate spinel ceramic pigments based on spent aluminium-cobalt-molybdenum catalyst

2020 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Аleksandr Viktorovich Zaichuk ◽  
Аleksandra Andreevna Amelina ◽  
Yurii Sergeevich Hordieiev ◽  
Liliya Frolova ◽  
Viktoriia Dmitrievna Ivchenko
Keyword(s):  
Mineral Composition ◽  
Firing Temperature ◽  
Active Form ◽  
Spinel Solid Solution ◽  
Ceramic Pigments ◽  
Blue Colour ◽  
Content Type ◽  
Spinel Pigments ◽  
Colour Indices ◽  
Spinel Ceramic

Purpose The purpose of this paper is to conduct the directed synthesis of blue-colour aluminate spinel pigments based on spent aluminium–cobalt–molybdenum (ACM) catalyst and to study peculiar features of mineral formation processes and changes in their colour indices depending on composition and firing temperature. Design/methodology/approach Aluminate spinel ceramic pigments with specified colour indices were synthesised by directed formation of their mineral composition and identification of the most rational technological parameters of production. Mineral composition of synthesised pigments was evaluated by X-ray phase analysis. The colour indices of pigments and pigment-containing glaze coatings were studied on the comparator colour. The chemical resistance of pigments was determined by loss of their weight loss after boiling in 1 N hydrochloric acid solution and 1 N sodium hydroxide solution. Findings Peculiar features of formation of the mineral composition of aluminate spinel pigments based on the ACM catalyst were studied. The expediency of using magnesium and zinc oxides in their composition has been proved. It is found that for the formation of stable pigments of intense blue colour, a concentration of cobalt (II) oxide in the amount of 0.5 mol is sufficient, which is 23.1 Wt.%. The colour of such pigments is determined by the ratios of cobalt, magnesium and zinc aluminates, which form a spinel solid solution. Practical implications The use of developed aluminate spinel pigments provides obtaining of high-quality glass coatings of blue colour, in particular, for ceramics. Originality/value Aluminium oxide in the spent ACM catalyst is predominantly in the active form (of amorphous aluminium hydroxide and y-Al2O3). This is a prerequisite for the use of this waste material as a complete substitute for chemically pure Al2O3 in the technology of aluminate spinel pigments and reduction of their firing temperature. Besides, spent ACM catalyst already contains 5 Wt.% of expensive cobalt (II) oxide in the form of stable colour-bearing phase CoAl2O4.

scholarly journals Dielectric properties of spinel ceramic Fe1.8V1.2O4

2012 ◽  
Vol 57 (36) ◽  
pp. 4707-4711
Author(s):  
Na Liu ◽  
YuHang Wang ◽  
LiuWan Zhang
Keyword(s):  
Dielectric Properties ◽  
Spinel Ceramic
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