FIELD: manufacturing of high grade super high frequency ceramics. SUBSTANCE: preliminary thread-like crystals of titanium dioxide are treated by sulfuric acid, its quantity being 0.25-0.5 dm3H2SO4 per 1 kg of titanium dioxide. Then mixing with oxygen-containing barium compound having melting point lower than 650 C is carried out. Thus prepared mixture is affected by heating within 3-6 h at 1050-1160 C. Ratio of said barium compound and titanium dioxide is 0.5-0.8 as calculated for BaO. Thus high grade single phase thread-like crystals of barium tetratitanate are obtained. EFFECT: improved efficiency of the method, improved quality of desired product. 2 tbl
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