Can Combustion Synthesis on LiNO3 Produce Lithium Oxide Li2O?

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SUMMARY

The discussion centers on the challenges of producing lithium oxide (Li2O) through combustion synthesis (SCS) using lithium nitrate (LiNO3) and various fuels such as citric acid, urea, sucrose, and glycine. Despite following established SCS protocols, the participant consistently obtains LiNO3 and occasionally lithium carbonate (Li2CO3) instead of Li2O. The participant is exploring alternative methods, including heating LiNO3 in a furnace at 485°C, as the decomposition reaction is defined by the equation 4LiNO3 + heat ==> 2Li2O + 4NO2 + O2. Concerns about temperature control are highlighted, particularly the risk of forming LiNO2 at temperatures exceeding 500°C.

PREREQUISITES
  • Understanding of combustion synthesis (SCS) techniques
  • Knowledge of lithium nitrate (LiNO3) properties and decomposition
  • Familiarity with thermal analysis and temperature control in chemical reactions
  • Basic chemistry knowledge regarding lithium compounds and their reactions
NEXT STEPS
  • Research the thermal decomposition of lithium nitrate (LiNO3) and its products
  • Investigate the effects of different fuels on combustion synthesis outcomes
  • Learn about X-ray diffraction (XRD) analysis for characterizing synthesized materials
  • Explore alternative methods for synthesizing lithium oxide (Li2O) from lithium compounds
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Chemists, materials scientists, and researchers focused on lithium compound synthesis, particularly those interested in combustion synthesis and thermal decomposition processes.

mykey651
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TL;DR
SCS on LiNO3 expected to obtain Li2O
I'm trying to obtain some lithium oxide Li2O using combustion synthesis on LiNO3. I tried different fuels such as: citric acid, urea, sucrose, glycine in different molar ratios. I follow the steps for SCS with gel formation, and combustion temperature but the results it's still the same. I always obtain LiNO3 back and sometimes some other Li-C compounds (maybe Li2CO3). I couldn't find any article on SCS for LiNO3 for Li2O obtaining but just some Li compounds with Mn, Co, Ni, Fe etc. but not just Li2O. Has anybody any idea what would be the catch? I currently working on decomposition of LiNO3 into Li2O using open flame and maybe a furnace. I would appreciate any suggestion, documents, articles, opinion on this matter. Thanks
 
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I have never done this but I think heating LiNO3 in a furnace @ 485 C should do it. The equation is
4LiNO3 + heat ==> 2Li2O + 4NO2 + O2

The temperature should be controlled since I understand that heating above 500 C will likely form LiNO2 but I can't confirm that.

Hope it works
 
Thank you Dr Bob.

Im waiting for xrd analysis on decomposed LiNO3 sample. I observed some bright white powder as result, similar with Li2O in appearance. Also i have found some limited information about LiNO3 deconposition. Can you share some with me if it is available?

Thank you
 

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