Lithium tetraborate(Li_(2)B_(4)O_(7):LBO),as a new piezoelectric crystal,has excellent performance in electro-mechanical voupling coefficient and stability of frequency in cornparison with commercial materials quartz,...Lithium tetraborate(Li_(2)B_(4)O_(7):LBO),as a new piezoelectric crystal,has excellent performance in electro-mechanical voupling coefficient and stability of frequency in cornparison with commercial materials quartz,LiNbO_(3),LiTaO_(3)crystals,so it has become a SAW and BAW devices substrate material with temPerature compensation in the future of wide use.展开更多
The supersaturated solution of Li2O·2B2O3-H2O containing 26.8% Li2O·2B2O3 were prepared and kept at 20℃ The crystallization processes of Li-borates from the solution has been studied with the kinetic method...The supersaturated solution of Li2O·2B2O3-H2O containing 26.8% Li2O·2B2O3 were prepared and kept at 20℃ The crystallization processes of Li-borates from the solution has been studied with the kinetic method.Two Li-borates, Li2B4O7·3H2O and LiBO2·8H2O crystallized out from Li2O·2B2O3-H2O solution. With the aid of simplex method and digital integration as well as RungeKutta digital solution of differential equation system, the experimental data were fitted and the crystailization kinetic equation of the first solid phase was obtained. The crystallization reaction processes of the two Li-borates were also discussed.展开更多
文摘Lithium tetraborate(Li_(2)B_(4)O_(7):LBO),as a new piezoelectric crystal,has excellent performance in electro-mechanical voupling coefficient and stability of frequency in cornparison with commercial materials quartz,LiNbO_(3),LiTaO_(3)crystals,so it has become a SAW and BAW devices substrate material with temPerature compensation in the future of wide use.
文摘The supersaturated solution of Li2O·2B2O3-H2O containing 26.8% Li2O·2B2O3 were prepared and kept at 20℃ The crystallization processes of Li-borates from the solution has been studied with the kinetic method.Two Li-borates, Li2B4O7·3H2O and LiBO2·8H2O crystallized out from Li2O·2B2O3-H2O solution. With the aid of simplex method and digital integration as well as RungeKutta digital solution of differential equation system, the experimental data were fitted and the crystailization kinetic equation of the first solid phase was obtained. The crystallization reaction processes of the two Li-borates were also discussed.
