Low-temperature-sintered BiFeO3-based high-performance negative-temperature-coefficient thermosensitive ceramic material and preparation method thereof
A negative temperature coefficient, heat-sensitive ceramic technology, applied in the field of electronic information functional materials, can solve problems such as hindering application, and achieve the effects of high practicability, high promotion and application prospects, and low sintering temperature
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[0018] Example 1:
[0019] with BaCO 3 , Bi 2 O 3 , Fe 2 O 3 and TiO 2 As raw material, according to the chemical formula 0.9BiFeO 3 -0.1BaTiO 3 Proportion, wet ball milling with anhydrous ethanol as the medium, drying at 750°C for 2 hours to synthesize 0.9BiFeO 3 -0.1BaTiO 3 solid solution powder, the obtained solid solution powder is subjected to secondary ball milling and sieving, and then the obtained 0.9BiFeO 3 -0.1BaTiO 3 A certain amount of polyvinyl alcohol (PVA) with a mass concentration of 5% is added to the solid solution powder, mixed uniformly, dried, and then pressed into a disc-shaped blank on a molding machine, and the obtained disc-shaped blank is heated at 905 ℃. Heat preservation for 4 hours and sintered into heat-sensitive ceramics. Put the resulting 0.9BiFeO 3 -0.1BaTiO 3 Thermal ceramics were polished on both sides and then tested for resistivity-temperature relationship and aging performance.
[0020] The performance test shows that the the...
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[0021] Example 2:
[0022] with SrCO 3 , Bi 2 O 3 , Fe 2 O 3 and TiO 2 As raw material, according to the chemical formula 0.8BiFeO 3 -0.2SrTiO 3 Proportion, wet ball milling with anhydrous ethanol as the medium, drying at 750°C for 4 hours to synthesize 0.8BiFeO 3 -0.2SrTiO 3 Solid solution powder, the obtained solid solution powder is subjected to secondary ball milling and sieving, and then the obtained 0.8BiFeO 3 -0.2SrTiO 3 A certain amount of polyvinyl alcohol (PVA) with a mass concentration of 5% is added to the solid solution powder, mixed uniformly, dried, and then pressed into a disc-shaped blank on a molding machine, and the obtained disc-shaped blank is heated at 935 ℃. Heat preservation for 4 hours and sintered into heat-sensitive ceramics. Put the resulting 0.8BiFeO 3 -0.2SrTiO 3 Thermal ceramics were polished on both sides and then tested for resistivity-temperature relationship and aging performance.
[0023] The performance test shows that the the...
Example Embodiment
[0024] Example 3:
[0025] with BaCO 3 , Bi 2 O 3 , Sb 2 O 3 , Fe 2 O 3 and SnO 2 As raw material, according to the chemical formula 0.95BiFeO 3 -0.05BaSb 0.04 Sn 0.96 O 3Proportion, wet ball milling with anhydrous ethanol as the medium, drying at 780°C for 2 hours to synthesize 0.95BiFeO 3 -0.05BaSb 0.04 Sn 0.96 O 3 solid solution powder, the obtained solid solution powder is subjected to secondary ball milling and sieving, and then the obtained 0.95BiFeO 3 -0.05BaSb 0.04 Sn 0.96 O 3 A certain amount of polyvinyl alcohol (PVA) with a mass concentration of 5% is added to the solid solution powder, mixed uniformly, dried, and then pressed into a disc-shaped blank on a molding machine, and the obtained disc-shaped blank is heated at 925 ℃. Heat preservation for 2 hours and sintered into heat-sensitive ceramics. Put the resulting 0.95BiFeO 3 -0.05BaSb 0.04 Sn 0.96 O 3 Thermal ceramics were polished on both sides and then tested for resistivity-temperature r...
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