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calcium aluminate blue features

Physical properties of calcium aluminates from vibrational

15.11.2004· Calculated values of C V at 298 K for the calcium aluminates may have uncertainties as small as ±1%, based on comparison with published calorimetric data for CaO, Al 2 O 3, and CaAl 2 O 4. For hibonite (CaAl 12 O 19), we predict C P as 519.3 J/mol-K and S as 391.7 J/mol-K, at 298 K.

high quality and good features of calcium aluminate for

This secondary dross is used for making calcium aluminate by sintering with limestone (CaCO 3) in a rotary kiln. Tests conducted by Yang and coworkers (2004) have shown that the calcium aluminate flux thus produced has high melting rate and good desulfurization capacity. It could well replace calcium fluoride as flux in steel production.

Mechanism of the Blue Up‐Conversion in Tm3+/Nd3+‐doped

21.01.2005· Blue up-conversion fluorescence from the Tm 3+: 1 G 4 → 3 H 6 (480 nm) transition has been observed from calcium aluminate glass codoped with Tm 3+ /Nd 3+.The mechanism for the up-conversion process consists of a two-photon process. An excitation beam with a wavelength of 791 nm first excites Tm 3+ to the 3 H 4 level, where Tm 3+ again absorbs the 1060 nm emission from Nd 3+: …

US20140338569A1 - Calcium Aluminate Cement - Google Patents

The present invention relates to a white calcium aluminate cement containing at least 90% by weight of monocalcium aluminate, an A/C value in the range of 1.75 to 2.0, a fineness according to Blaine in the range of 3500 to 6000 cm 2 /g, a slope n in the range of 1.1 to 1.5 and a loion parameter x′ of 8-20 μm in an RRSB particle size grid according to DIN 66145 as well as its use in

Calcium aluminate-based blue phosphor and method for the

A calcium aluminate-based blue phosphor is provided for environment-friendly light emitting materials and high efficiency photoalysts in dark places. A calcium aluminate-based blue phosphor comprises a composition represented by the formula 1, CaAl_2O_4:Eu_0.01Er_x. In the formula 1, x satisfies the following inequality, 0

Kerneos Inc.

Composed almost entirely of calcium aluminate phases, Secar ® 71 is ideally suited for refractory, or construction chemistry appliions. The primary mineralogical phases of Secar ® 71 are calcium aluminate (CaAl 2 O 4), and calcium di-aluminate (CaAl 4 O 7).

Kerneos Inc.

Composed almost entirely of calcium aluminate phases, Secar ® 71 is ideally suited for refractory, or construction chemistry appliions. The primary mineralogical phases of Secar ® 71 are calcium aluminate (CaAl 2 O 4), and calcium di-aluminate (CaAl 4 O 7).

Nanomaterials | Free Full-Text | Towards Blue Long-Lasting

Specifically, the blue light can be obtained through the Eu 2+ activator center in a potential host, such as dodecacalcium hepta-aluminate (Ca 12 Al 14 O 33) and monocalcium aluminate (CaAl 2 O 4). By doping with Nd 3+ , the persistent luminescence can be substantially prolonged; for this reason, the Eu/Nd pair is a potential choice for developing long-lasting blue luminescence.

and good features of calcium aluminate for water treatment

and good features of calcium aluminate for water treatment High-quality Raw Pure Industrial-use calcium aluminate for water treatment Leading calcium aluminate for water treatment suppliers and wholesalers on the site offer these products for affordable prices and provide competitive deals that can save customers money in the long run.

Preparation and properties of calcium hexaluminate blue

The doping of nickel and titanium is evaluated with the goal of coloring calcium hexaluminate ceramic (CaAl12−2xNixTixO19) and improving mechanical properties. The samples prepared by solid-phase reaction are studied with X-ray diffraction, UV–Vis diffuse reflection, a Konica Minolta colorimeter, scanning electron microscopy, and an indentation test of hardness.

Mechanism of the Blue Up‐Conversion in Tm3+/Nd3+‐doped

21.01.2005· Blue up-conversion fluorescence from the Tm 3+: 1 G 4 → 3 H 6 (480 nm) transition has been observed from calcium aluminate glass codoped with Tm 3+ /Nd 3+.The mechanism for the up-conversion process consists of a two-photon process. An excitation beam with a wavelength of 791 nm first excites Tm 3+ to the 3 H 4 level, where Tm 3+ again absorbs the 1060 nm emission from Nd 3+: …

ZrO2-nucleated calcium aluminate glass-ceramics with mid

A silica-free MgO–CaO–BaO–Al 2 O 3 –ZrO 2 glass was converted into glass-ceramic by adding zirconia as a nucleating agent. The crystallization and properties of the glass-ceramics were investigated. It was found that ZrO 2 is an efficient nucleating agent for the present calcium aluminate glass. Addition of an appropriate amount of ZrO 2 changed the crystallization behavior from

Development of a Blue Emitting Calcium-Aluminate Phosphor

blue-emitting calcium aluminate phosphor (CaAl 2O 4: Eu 2+, Nd3+). The investigation of long-persistence blue-emitting phosphors is highly desirable due to their promising appliions,

From Molten Calcium Aluminates through Phase Transitions

26.11.2019· The calcium‐aluminate glass‐forming system is very extensive compared, for instance, to binary silies, 12 incorporating additional oxygen sites to the well‐known bridging O 2 and nonbridging O 1 varieties. These include O 3 triclusters as well as isolated O 0 species. 4, 6, 8-11 Moreover, not all aluminum polyhedra are tetrahedral Al IV, wherein Al V and some more constrained Al VI

Preparation and properties of calcium hexaluminate blue

The doping of nickel and titanium is evaluated with the goal of coloring calcium hexaluminate ceramic (CaAl12−2xNixTixO19) and improving mechanical properties. The samples prepared by solid-phase reaction are studied with X-ray diffraction, UV–Vis diffuse reflection, a Konica Minolta colorimeter, scanning electron microscopy, and an indentation test of hardness.

ZrO2-nucleated calcium aluminate glass-ceramics with mid

A silica-free MgO–CaO–BaO–Al 2 O 3 –ZrO 2 glass was converted into glass-ceramic by adding zirconia as a nucleating agent. The crystallization and properties of the glass-ceramics were investigated. It was found that ZrO 2 is an efficient nucleating agent for the present calcium aluminate glass. Addition of an appropriate amount of ZrO 2 changed the crystallization behavior from

Energy Transfer Process for the Blue Up‐Conversion in

20.12.2004· Energy Transfer Process for the Blue Up-Conversion in Calcium Aluminate Glasses Doped with Tm 3+ and Nd 3+ Woon Jin Chung, Photonic Glasses Laboratory, Department of Materials Science and Engineering, Pohang University of Science and Technology, Pohang, Kyungbuk, 790-784, Korea . Search for more papers by this author. Jong Heo, Photonic Glasses Laboratory, Department …

Calcium Aluminate-China Calcium Aluminate Manufacturers

China Calcium Aluminate.

Calciumaluminate – Wikipedia

ALAG (ALuminous AGgregate) is a synthetic calcium aluminate aggregate manufactured by the fusion of bauxite and limestone into a partially re-crystallized aggregate of approximately 40% alumina. It is essentially Fondu clinker, crushed and sized into grades commonly needed by …

Towards Blue Long-Lasting Luminescence of Nd-Doped Calcium

16.10.2019· nanomaterials Article Towards Blue Long-Lasting Luminescence of Eu/Nd-Doped Calcium-Aluminate Nanostructured Platelets via the Molten Salt Route Rocío E. Rojas-Hernandez 1,2,* , Fernando Rubio-Marcos 1,3, Aida Serra, Eduardo Salas 4,5, Irina Hussainova 2 and José Francisco Fernandez 1 1 Electroceramic Department, Instituto de Cerámica y Vidrio, CSIC, Kelsen 5, 28049 …

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KR100893074B1 - Calcium aluminate-based blue phosphor and

A calcium aluminate-based blue phosphor is provided for environment-friendly light emitting materials and high efficiency photoalysts in dark places. A calcium aluminate-based blue phosphor comprises a composition represented by the formula 1, CaAl_2O_4:Eu_0.01Er_x. In the formula 1, x satisfies the following inequality, 0

and good features of calcium aluminate for water treatment

and good features of calcium aluminate for water treatment High-quality Raw Pure Industrial-use calcium aluminate for water treatment Leading calcium aluminate for water treatment suppliers and wholesalers on the site offer these products for affordable prices and provide competitive deals that can save customers money in the long run.

Calcium aluminates - Wikipedia

Calcium aluminates are a range of materials obtained by heating calcium oxide and aluminium oxide together at high temperatures. They are encountered in the manufacture of refractories and cements. The stable phases shown in the phase diagram (formed at atmospheric pressure under an atmosphere of normal humidity) are: