Electron Diffraciton Study Of B203 Glasses Obtained At Different Cooling Rates

Short range order in B203 glasses with different thermal histories is investigated using electron diffraction. The samples are obtained at two different melting temperatures and after that are either rapidly or slowly cooled. It is demonstrated that, for the glasses obtained from melts heated at 800 deg C, the cooling rates do not affect the short range order. Only fast quenching of the melt overheated at 1350 deg C leads to a decrease in the number of boroxol rings in the network.