Calcium aluminates are a range of minerals obtained by heating calcium oxide (CaO) and aluminium oxide (Al2O3) together at high temperatures. Dodecacalcium hepta-aluminate, 12CaO·7Al2O3 (C12A7) mayenite has a cubic crystal lattice (BCC) with a lattice parameter of 1.199 nm and space group I4¯3d.
Hi Aditi, I tihink you could search values in papers, also you could try in www.matweb.com for properties of materials, and finally you could use nanoindentation for obtain modulus (and other props.) of your material.
Hi E. Garcia-Sanchez,
Thank you for suggestion!
I did not find any paper. I think I have to assume some value for this material. In matweb site also, I did not find the value I want.
Poisson ratio=0.25
Young’s Modulus
For anhydrous =5GPa By using Synchroton high pressure X-rays
For hydrated = varies containg different % of water
For sample containing1.3% H2O , it is 140 GPa
For details
Fill/ Click :
1. [PDF]Fulltext - DiVA
www.diva-portal.org/smash/get/diva2:233826/FULLTEXT01.pdf
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by O Paulsen - 2009 - Cited by 5 - Related articles
the sample CAM5 either the phase C12A7 or the more alumina rich phase. C5A3 would be ...... 18.4. 21.2. 59.9 Ca12Al14O33 (C12A7). Figure 6.11 ...... on a Poisson ratio of 0.25 for all three materials, a Young's modulus of 100. MPa for the CAM10 ... In the calculations an E-modulus of 50 GPa has been applied. Figure 9.5.
Hello Manohar Sehgal,
I want elastic modulus and Poisson's ratio for C12A7, not of CAM5 or CAM10. Is there mention the value of both for C12A7?
[A] Fill/ Click :
Young's Modulus (GPa) and Poisson's ratio of C12A7 (Ca12Al14O33)
Then Reach
1. aluminate cements hydration: Topics by WorldWideScience ...
worldwidescience.org/topicpages/a/aluminate+cements+hydration.html
The hydration of different CA/CA{sub 2} ratios was analyzed by the G-factor quantification. ...... on the changes in the elastic modulus, shear modulus andPoisson`s ratio at ..... The determination of C12A7 presents some variations due to its low ..... were obtained up to 5 GPa by using synchrotron high-pressure X-ray powder ..
For Young's Modulus[ find 5GPa]
Reach and read the last two lines of the following; starting from----.
.
[B] Now for Poisson's ratio
Pls. note the line of the reference already lying with you
(C12A7). Figure 6.11 ...... on a Poisson ratio of 0.25 for all three materials,
Hello Manohar Sehgal,
That Poisson's ratio you are telling for all materials is of La2NiO4, Al2O3 and crystallised BLS and not of C12A7.
And Young's modulus of Calcium Aluminates is generally higher than 100 GPa. So 50 Gpa is not of C12A7 material.
If am not wrong:
[!}i have already made mention of it being 140 but of component 1.3% water:
Pls. see a line below taken from the first answer:
:[For sample containing 1.3% H2O , it is 140 GPa]
[ii}] In the figure, the calculations for three compounds are done with ratio 0.25. ,Ca12A7 being one among the three.
It is a thesis of more than 10 K bites with the name given in the attachment.
You may look in whole thesis if you find it worth .
But especially look in-page 51. top 5 th line to find 1.3% H2O ; read it wrt 140 GPa from the references already lying with you. This is what I have correlated. Sorry If my effort has gone wasted,
Thank you Manohar Sehgal !
Its Ca12Al14O32(OH)2 phase. And in this thesis, in which page young's modulus value is given?
My child- why should this old man tell a lie? Yes- one can go wrong. It is most hard earned vote up for me . I have made a mention of figures like 0.25, 1..3%, 140. 5.Pls search my half a dozen answers and find them ;all being indirectly related.
Now how to reach a 140?And read the third line from the bottom
[A] Fill/ Click :
Young's Modulus (GPa) and Poisson's ratio of C12A7 (Ca12Al14O33)
Then Reach:
Final Program - The American Ceramic Society
ceramics.org/wp-content/uploads/2014/02/unitecr13_finalprogram.pdf
•
Sep 11, 2013 - ... Modulus of. Elasticity, Poisson's Ratio. ...... and amounts to Young's modulus of elasticity at elevated temperatures of ...... out that refractories with high E values (~140 GPa, as the evaluated alumina-based .... ation of transient phases such as CaO, Ca12Al14O33 (C12A7) and CA2 is seen to occur at ..
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