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Method for determining molar ratio of calcium to zirconium in calcium zirconate

A molar ratio, calcium zirconate technology, used in measuring devices, instruments, scientific instruments, etc., can solve the problems of time-consuming, labor-intensive, cumbersome steps, etc.

Active Publication Date: 2021-11-26
福建贝思科电子材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Generally, the element content is measured first, and then converted, the steps are cumbersome, time-consuming and labor-intensive

Method used

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  • Method for determining molar ratio of calcium to zirconium in calcium zirconate
  • Method for determining molar ratio of calcium to zirconium in calcium zirconate
  • Method for determining molar ratio of calcium to zirconium in calcium zirconate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0141] 1. Test process

[0142] S1. Set a series of different Ca / Zr molar ratios, mix zirconium dioxide and calcium carbonate according to the set ratios, and obtain a series of standard products with different calcium-zirconium molar ratios.

[0143] The setting values ​​are as follows: 0.9650, 0.9699, 0.9752, 0.9802, 0.9851, 0.9902, 0.9950, 0.9998.

[0144] S2. Treat the standard product at 150°C for 30 minutes to obtain the pre-treated standard product.

[0145] Weigh 0.6000g±0.0001g pretreatment standard and 6.0000g±0.0001g flux (lithium tetraborate 67%, lithium metaborate 33%), put them into a platinum crucible, and stir evenly. Then, 0.5±0.05g of mold release agent (anhydrous lithium bromide solution, concentration 30.5g / 50mL) was added dropwise. After that, put it into a high-frequency fusion machine for sample preparation, and the conditions are: the melting temperature is 1170°C, the pre-stand time is 240s, and the swing time is 600s. Get a standard fuse.

[0146]...

Embodiment 2

[0174] 1. Test process

[0175] S1. Set a series of different Ca / Zr molar ratios, mix zirconium dioxide and calcium carbonate according to the set ratios, and obtain a series of standard products with different Ca / Zr molar ratios.

[0176] The setting values ​​are as follows: 0.9650, 0.9699, 0.9752, 0.9802, 0.9851, 0.9902, 0.9950, 0.999.

[0177] S2. Treat the standard product at 150°C for 30 minutes to obtain the pre-treated standard product.

[0178] Weigh 0.6000g±0.0001g pretreatment standard and 6.0000g±0.0001g flux (lithium tetraborate 67%, lithium metaborate 33%), put them into a platinum crucible, and stir evenly. Then, 0.5±0.05g of mold release agent (anhydrous lithium bromide solution, concentration 30.5g / 50mL) was added dropwise. After that, put it into a high-frequency fusion machine for sample preparation, and the conditions are: the melting temperature is 1170°C, the pre-stand time is 240s, and the swing time is 600s. Get a standard fuse.

[0179] S3. Construc...

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PUM

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Abstract

The invention provides a method for measuring the molar ratio of calcium to zirconium in calcium zirconate. The method comprises the following steps: setting a series of different molar ratios of calcium to zirconium, and mixing zirconium dioxide and calcium carbonate according to a set value to obtain a series of standard substances with different molar ratios of calcium to zirconium; and then preparing a fuse piece, putting the fuse piece into XRF for testing, establishing a standard curve of a calcium-zirconium element signal intensity ratio and a calcium-zirconium molar ratio, and then testing a to-be-tested sample to obtain the calcium-zirconium molar ratio of the to-be-tested sample. According to the method, the signal intensity ratio and the molar ratio of calcium and zirconium are directly fitted to establish the standard curve, the molar weight of Zr is defaulted to be 1, and the molar weight of Ca is output as a Ca / Zr molar ratio result, so that the Ca / Zr molar ratio of calcium zirconate is directly obtained; or the relationship between Ca and Zr is replaced, so that the Zr / Ca molar ratio of calcium zirconate is obtained. Compared with a traditional detection method, the method provided by the invention has the advantages that tedious steps are omitted, the calcium-zirconium molar ratio can be quickly and intuitively obtained, the accuracy is high, and the stability is high.

Description

technical field [0001] The invention relates to the field of element testing, in particular to a method for determining the molar ratio of calcium to zirconium in calcium zirconate. Background technique [0002] Calcium zirconate (CaZrO 3 ) is a relatively stable compound, which is widely used in high-temperature ceramics and refractory materials. Theoretically, calcium zirconate (CaZrO 3 ) with a Ca / Zr molar ratio of 1:1, but in actual preparation, the purity of raw materials is not 100%, and some factors such as impurities, ignition loss, moisture, and errors in the weighing process lead to a gap between the theoretical value of feeding and the actual value of the product. There is a difference, and it needs to be tested to determine whether the calcium-zirconium ratio reaches the target range. Calcium zirconate belongs to electronic ceramic powder and is the raw material of MLCC ceramic capacitors. The Ca / Zr molar ratio has a more obvious impact on the customer's sinte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N23/223G01N23/2202
CPCG01N23/223G01N23/2202
Inventor 邓贵仁林文标梁火生
Owner 福建贝思科电子材料股份有限公司