A preparation method of grain-oriented sodium strontium niobate lead-free ferroelectric ceramics
A technology of sodium strontium niobate and grain orientation, which is applied in circuits, electrical components, piezoelectric/electrostrictive/magnetostrictive devices, etc., can solve problems such as environmental pollution, achieve good reproducibility and stability, The effect of simple steps and small deviation of formula
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Embodiment 1
[0044] This embodiment is a method for preparing a grain-oriented sodium strontium niobate lead-free ferroelectric ceramic, and its specific process is:
[0045] Step 1: Synthesis of sodium niobate (NaNbO 3 ) powder. The specific process of said synthetic sodium niobate matrix powder is: after weighing and mixing analytically pure sodium carbonate and niobium pentoxide powder according to the stoichiometric ratio, place it in a polytetrafluoroethylene ball mill jar, add absolute ethanol in the Ball milled on a ball mill for 12 hours. The weight ratio of the absolute ethanol to the raw material mixture is 1:1. The wet material after ball milling was placed in an oven and dried at 70°C. Grind the dried powder. The ground powder was placed in a corundum crucible, the temperature was raised to 750 °C at a heating rate of 5 °C / min, and kept for 4 hours, and the ground powder was calcined. After calcination, cool down to room temperature with the furnace to obtain sodium niobat...
Embodiment 2
[0071] This embodiment is a preparation method of grain-oriented sodium strontium niobate lead-free ferroelectric ceramics, and its specific process is:
[0072] Step 1: Synthesis of sodium niobate (NaNbO 3) powder. The specific process of said synthetic sodium niobate matrix powder is: after weighing and mixing analytically pure sodium carbonate and niobium pentoxide powder according to the stoichiometric ratio, place it in a polytetrafluoroethylene ball mill jar, add absolute ethanol in the Ball milled on a ball mill for 12 hours. The weight ratio of the absolute ethanol to the raw material mixture is 1:1. The wet material after ball milling was placed in an oven and dried at 70°C. Grind the dried powder. The ground powder was placed in a corundum crucible, the temperature was raised to 850 °C at a heating rate of 5 °C / min, and kept for 1 h, and the ground powder was calcined. After calcination, cool down to room temperature with the furnace to obtain sodium niobate pow...
Embodiment 3
[0096] This embodiment is a method for preparing a grain-oriented sodium strontium niobate lead-free ferroelectric ceramic, and its specific process is:
[0097] Step 1: Synthesis of sodium niobate (NaNbO 3 ) powder. The specific process of said synthetic sodium niobate matrix powder is: after weighing and mixing analytically pure sodium carbonate and niobium pentoxide powder according to the stoichiometric ratio, place it in a polytetrafluoroethylene ball mill jar, add absolute ethanol in the Ball milled on a ball mill for 12 hours. The weight ratio of the absolute ethanol to the raw material mixture is 1:1. The wet material after ball milling was placed in an oven and dried at 70°C. Grind the dried powder. The ground powder was placed in a corundum crucible, the temperature was raised to 780 °C at a heating rate of 5 °C / min, and kept for 3 hours, and the ground powder was calcined. After calcination, cool down to room temperature with the furnace to obtain sodium niobat...
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