Strontium titanate piezoresistor and preparation method thereof
A technology of varistors and strontium titanate, which is applied in the field of strontium titanate varistors and its preparation, can solve the problems of low voltage sensitive voltage, high nonlinear coefficient, application prospects that cannot be replaced, etc., and achieve simple product quality, Good process performance
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Example Embodiment
[0010]Example 1
[0011]According to the composition of strontium titanate varistor:
[0012]Sr0.98TiO3+0.5mol%(CeO2+Nb2O5)+0.6mol%(ZnO+1 / 2NaCO3)+0.9mol%SiO2.
[0013]The preparation method of strontium titanate varistor includes the following steps:
[0014]a) A strontium titanate (Sr0.98TiO3) Preparation of powder materials
[0015]According to the ratio required in Example 1, weigh strontium chloride (SrCl4), titanium chloride (TiCl4) Add (HCl) hydrochloric acid and aqueous solution, stir and heat at 60°C, add an aqueous solution of equimolar amount of oxalic acid and a small amount of absolute ethanol, adjust the pH to 1 with hydrochloric acid, mix and precipitate, wash and filter to obtain a precipitate, Dry at 110°C, then thermally decompose at 800°C for 4 hours to obtain strontium titanate (Sr0.98TiO3) Powder material.
[0016]b) The obtained strontium titanate (Sr0.98TiO3) Powder and 0.6mol% (ZnO+1 / 2NaCO3)+0.9mol%SiO2Mix and ball mill for 8 hours, dry at 120°C, and punch into discs with Φ8mm ...
Example Embodiment
[0018]Example 2
[0019]According to the composition of strontium titanate varistor:
[0020]Sr0.988TiO3+0.3mol%(CeO2+Nb2O5)+0.4mol%(ZnO+1 / 2NaCO3)+0.5mol%SiO2.
[0021]The preparation method of strontium titanate varistor includes the following steps:
[0022]b) A strontium titanate (Sr0.988TiO3) Preparation of powder materials
[0023]According to the proportion, weigh the strontium chloride (SrCl4), titanium chloride (TiCl4) Add (HCl) hydrochloric acid and aqueous solution, stir and heat at 60°C, add an aqueous solution of equimolar amount of oxalic acid and a small amount of absolute ethanol, adjust the pH to 1 with hydrochloric acid, mix and precipitate, wash and filter to obtain a precipitate, Dry at 110°C, and then thermally decompose at 850°C for 6 hours to obtain strontium titanate (Sr0.98TiO3) Powder material.
[0024]b) The obtained strontium titanate (Sr0.98TiO3) Powder and 0.3mol% (CeO2+Nb2O5)+0.4mol%(ZnO+1 / 2NaCO3)+
[0025]0.5mol% SiO2Mix and ball mill for 10 hours, dry at 120°C, and punch ...
Example Embodiment
[0027]Example 3
[0028]According to the composition of strontium titanate varistor:
[0029]Sr0.984TiO3+0.5mol%(CeO2+Nb2O5)+0.5mol%(ZnO+1 / 2NaCO3)+0.6mol%SiO2.
[0030]The preparation method of strontium titanate varistor includes the following steps:
[0031]c) A strontium titanate (Sr0.988TiO3) Preparation of powder materials
[0032]According to the proportion, weigh the strontium chloride (SrCl4), titanium chloride (TiCl4) Add (HCl) hydrochloric acid and aqueous solution, stir and heat at 60°C, add an aqueous solution of equimolar amount of oxalic acid and a small amount of absolute ethanol, adjust the pH to 1 with hydrochloric acid, mix and precipitate, wash and filter to obtain a precipitate, Dry at 110°C, and then thermally decompose at 850°C for 6 hours to obtain strontium titanate (Sr0.984TiO3) Powder material.
[0033]b) The obtained strontium titanate (Sr0.984TiO3) Powder and 0.5mol% (CeO2+Nb2O5)+
[0034]0.5mol%(ZnO+1 / 2NaCO3)+0.6mol%SiO2Mix and ball mill for 10 hours, dry at 120°C, and punch...
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