Preparation method of barium strontium titanate semiconductive ceramics
A barium strontium titanate and semiconductor technology, which is applied in the field of preparation of barium strontium titanate semiconducting ceramics, can solve the problems of difficult co-firing of ceramic layers, uneven component distribution, impurity pollution, etc., and achieve good comprehensive PTCR performance, which is beneficial to Effects of layering and high lift-to-drag ratio
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[0020] Example 1
[0021] (1) Y-BaTiO 3 Powder preparation steps:
[0022] 1mol(Ba 0.75 Sr 0.25 )Ti 1.02 O 3 +0.4mol%Y 2 O 3 +0.04mol%Mn(NO 3 ) 2 Configure pure BaCO 3 , SrCO 3 , TiO 2 , Y 2 O 3 The powder is ball milled with distilled water for 4 hours, dried, crushed, sieved, sintered at a temperature of 1200°C and kept for 3 hours to obtain barium strontium titanate powder;
[0023] (2) Preparation steps of glass sintering aid:
[0024] 0.5mol BaCO in molar ratio 3 +1mol H 3 BO 3 +2mol% SiO 2 , Weigh BaCO 3 , H 3 BO 3 , SiO 2 Powder and Mn(NO 3 ) 2 Solution, use ZrO 2 Ball mill the mixture for 4 hours, dry, pulverize, sieving, then put the mixed powder into the corundum crucible, heat it to 1100°C at a heating rate of 5°C / min, keep it warm for 60 minutes, pour it into water and quench it to obtain Then use ZrO2 ball mill for 4 hours, dry at 80℃, smash and sieving to obtain glass powder;
[0025] (3) PTCR ceramic preparation steps
[0026] Add the glass powder obtained in step (...
Example Embodiment
[0027] Example 2
[0028] (1) Y-BaTiO 3 Powder preparation steps:
[0029] 1mol(Ba 0.75 Sr 0.25 )Ti 1.02 O 3 +0.6mol%Y 2 O 3 Configuration analysis pure BaCO 3 , SrCO 3 , TiO 2 , Y 2 O 3 The powder is ball milled with distilled water for 5 hours, dried, crushed, sieved, sintered at a temperature of 1150°C, and kept for 3 hours to obtain barium strontium titanate powder;
[0030] (2) Preparation steps of glass sintering aid:
[0031] 0.5mol BaCO in molar ratio 3 +1mol H 3 BO 3 +5mol% SiO 2 +0.06mol%Mn(NO 3 ) 2 , Weigh BaCO 3 , H 3 BO 3 , SiO 2 Powder and Mn(NO 3 ) 2 Solution, use ZrO 2 Ball mill the mixture for 5 hours, dry, pulverize, sieving, and then put the mixed powder into a corundum crucible, heat it to 1150°C at a heating rate of 5°C / min, keep it warm for 30 minutes, and pour it into water for quenching. ZrO 2 Ball mill for 4 hours, dry at 80°C, smash and sieve to obtain glass powder;
[0032](3) PTCR ceramic preparation steps
[0033] Add the glass powder obtained in step ...
Example Embodiment
[0035] Example 3
[0036] (1) Y-BaTiO 3 Powder preparation steps:
[0037] 1mol(Ba 0.70 Sr 0.30 )Ti 1.01 O 3 +0.8mol%Y 2 O 3 Configuration analysis pure BaCO 3 , SrCO 3 , TiO 2 , Y 2 O 3 The powder is ball milled with distilled water for 6 hours, dried, crushed, sieved, sintered at a temperature of 1250°C, and kept for 2 hours to obtain barium strontium titanate powder;
[0038] (2) Preparation steps of glass sintering aid:
[0039] 0.5mol BaCO in molar ratio 3 +1mol H 3 BO 3 +8mol% SiO 2 , Weigh BaCO 3 , H 3 BO 3 , SiO 2 Powder and Mn(NO 3 ) 2 Solution, use ZrO 2 Ball mill the mixture for 6 hours, dry, pulverize, sieving, and then put the mixed powder into a corundum crucible, heat it to 1150°C at a heating rate of 5°C / min, hold it for 10 minutes, pour it into water to quench, and get ZrO 2 Ball mill for 6 hours, dry at 100℃, sieving after crushing to obtain glass powder;
[0040] (3) PTCR ceramic preparation steps
[0041] The glass powder obtained in step (2) is added to the ba...
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