Special Ceramic Equipment Quality Appraisal

special ceramic equipment takes the synergy of high-temperature sintering and precision molding as its core principle. By optimizing sintering temperature control, pressure accuracy and atmosphere uniformity, it achieves the synergy of density, mechanical properties and microstructure consistency of ceramic products. It is widely used in aerospace, electronic packaging, biomedical and new energy and other fields. In the sintering of alumina ceramics, it is used for defect-free molding of high-temperature structural parts; in the field of silicon nitride ceramics, it meets the precision processing needs of highly thermally conductive insulating parts; in the production of piezoelectric ceramics, it ensures the uniformity of the electric field in the polarization process. Compared with traditional ceramic equipment, special ceramic equipment has the characteristics of ultra-high temperature resistance, precise atmosphere control, and intelligent monitoring. It is the core equipment of high-performance ceramic manufacturing.

Zhongke Testing is a product quality appraisal service organization registered with the court. It can provide quality appraisal services for special ceramic equipment. It has a professional appraisal team and advanced instruments and equipment to provide fair and accurate appraisal results for the quality appraisal of special ceramic equipment.

1. Material inspection: analyze the composition, microstructure and mechanical properties of materials used in special ceramic equipment to determine whether the materials meet the design requirements.

2. Process evaluation: Check whether the equipment process flow, processing parameters, etc. are reasonable and whether the quality of the equipment can be maintained.

3. Performance test: Conduct performance test on the equipment to test its molding accuracy, processing efficiency, equipment stability, etc., and compare with the indicators specified in the contract.

4. Failure analysis: If the equipment fails, the appraisal agency will conduct a failure analysis on it to find out the cause of the failure and determine whether it is an equipment quality problem.

An electronic ceramics factory of the applicant signed a "Zirconium Oxide Ceramic Sintering Furnace Purchase Contract" with an equipment manufacturer of the respondent, agreeing that the sintering density is ≥99%. After being put into production, the porosity of the product exceeded 5%. The manufacturer argued that it was caused by the uneven particle size of the raw material powder.

identification analysis results:

The quality analysis expert group discussed and comprehensively analyzed the relevant information of "special ceramic equipment", contract technical agreements, on-site investigation case materials and other data, and made the following quality scores Analytical opinion:

The special ceramic equipment involved in the case has a furnace temperature uniformity deviation of ±15°C (agreement ≤±5°C), and the atmosphere oxygen content reaches 25ppm (agreement ≤10ppm); the MoSi₂ heating rod Mo content is 98% (agreement ≥99.5%), and local oxidation at high temperatures causes thermal field distortion.

The appraisal conclusion concluded that equipment temperature control system and material defects were the main causes of sintering failure.

Special ceramic equipment quality appraisal report should include:

1, appraisal purpose (such as product defect attribution, process compliance verification) and reference standards;

2, equipment model involved, process parameters, production logs;

3, testing methods and equipment Checklist (such as SEM, XRF);

4, correlation analysis between test data and failure (such as the impact of temperature field deviation on density);