@article{oai:nagasaki-u.repo.nii.ac.jp:00015654,
 author = {古賀, 秀人 and 小池, 隆 and 内山, 休男 and 羽坂, 雅之},
 issue = {1095},
 journal = {窯業協會誌, Journal of the Ceramic Association, Japan},
 month = {Nov},
 note = {The optical absorption spectra of VO2+ ions dissolved in PbO-B2O3 and R2O-PbO-B2O3 glasses (R=K or Na) have been measured.  By using the spectral results, the bonding mode of Pb in the glasses has been disussed.  Judging from the dependence of peak position for B*2-E*n transition on the glass composition, it is suggested that although Pb behaves as a network modifier in the glasses, a part of Pb contributes to the formation of glass network.  This relation is discussed on the basis of the relation between the peak wave number and ratio of four-coordinated B atoms to the total B atoms (N4B).  On the assumption that the Pb ratio used in the formation of the glass network is α(x-0.2) in xPb(1-x)B2O3 glasses and (x+y-0.2) in xR2OyPbO(1-x-y)B2O3 glasses, the value of α is calculated to be 2.04., 窯業協会誌, 94(1095), pp.1125-1130; 1986},
 pages = {1125--1130},
 title = {PbO-B_2O_3系及びR_2O-PbO-B_2O_3系(R=K or Na)ガラス中のVO^<2+>の光吸収スペクトルとPb原子の存在形態の研究},
 volume = {94},
 year = {1986}
}