A method for testing the softening point and melting range of a polycarbosilane ceramic precursor material

CN115201251BActive Publication Date: 2026-06-23福建立亚化学有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
福建立亚化学有限公司
Filing Date
2021-04-09
Publication Date
2026-06-23

AI Technical Summary

Technical Problem

Existing methods for testing the softening point and melting range of polycarbosilane ceramic precursor materials suffer from problems such as sample electrostatics, inconsistent particle size, loose capillary packing, inconsistent packing height, and improper selection of starting temperature, resulting in poor repeatability and low accuracy of test results.

Method used

The sample was ground using a tungsten carbide mortar and pestle, and the particle size was controlled using a 400-mesh sieve. The sample volume and filling height were controlled using a fully automatic capillary filling device, and the mold temperature was tested at a heating rate of 3 to 5 times. Appropriate starting and ending temperatures were set.

Benefits of technology

It improves the repeatability and accuracy of test results, reduces human error, ensures consistent sample volume and tight packing, and provides reliable softening point and melting range data.

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Abstract

The application discloses a kind of polycarbosilane ceramic precursor material softening point and the test method of melting range, polycarbosilane ceramic precursor material softening point and the test method of melting range, comprising the following steps: take appropriate amount of PCS sample in tungsten carbide mortar and carry out grinding;After grinding, fine PCS sample is screened with screen mesh;With capillary to fill screened PCS sample, and with the measuring slot on capillary fixed clamp to check the filling height of PCS sample;Capillary is placed in automatic capillary filling device, and sets the number of impacts, to prepare the capillary sample of sample amount consistent and filling compact;Filling compact capillary sample is subjected to mold temperature test;Wherein, control initial temperature and softening point are in 3-5 times heating rate.The softening point and melting range data of PCS can be accurately obtained after the above technical scheme.The test method can reduce human operation error, has good repeatability, strong operability, and has practical application value.
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