新工艺的成功需要新测试方法

专业读者都了解．实施新的工艺．以及采用新的基础和工艺材料．如果这一过程的每一步骤不能得到坚实的测试方法的支持的话．也许就是导致灾难后果的方法。在用户同时又在经历向无铅工艺(可能也向无卤基材料)转变的情形下．更其如此。现在有了关于清洗和可靠性评估的方法“工具箱”．也需要关于新的基础材料、焊接材料和清洗媒介的相应的新测试方法以及取舍标准，以便做出以数据为基础和动力的成功决策。     

Sol-gel Preparation and Preliminary in vitro Evaluation of Fluorapatite／Hydroxyapatite Solid Solution Films

Fluorapatite/hydroxyapatite solid solution has better biological properties than other apatites, especially used as films or coatings. In this work, sol-gel preparation and in vitro behavior of fluorapatite/hydroxyapatite solid solution films on titanium alloy were investigated. Ca(NO3)2-4H20 and PO(OH)x(OEt)3-x were selected as precursors, and hexafluorophosphoric acid (HPFo) was used as a fluorine containing reagent. The Ca and P precursors were mixed with HPFo to keep the Ca/P molar ratio 1.67. The mixtures refluxed for 12 h were used as dipping sols for the preparation of the films. The phase of the films obtained at 600℃ was apatite. The F contents in the films increased with the concentrations of HPF6 in the dipping sols. The solid solution films were shown to have better stability than hydroxyapatite films, and a reasonably good bioactivity in the in vitro evaluation.     

浅谈电子行业及冶炼炉供氢工艺

本文介绍了三种现场供氢的典型工艺，并结合实例进行了比较、分析。     

KZON-170/550型空分设备在浮法玻璃生产中的应用

以含氧小于10ppm的高纯氮气(占94~95%)与含氧小于15ppm的氢气(占5~6%)作混合气保护锡槽,防止锡被氧化。介绍了该套设备性能良好,采用无油润滑空压机、分子筛净化再生新工艺、氧氮气双高,并简介了运行管理的几条经验。表1。     

井下活动气嘴在孤岛垦西油气田的应用

井下活动气嘴是一种新型节流装置。它能丢掉地面加热炉,利用地热进行节流生产,确保气井在严冬也能照常生产。从1989年10月到1990年6月底先后在6口井中试验生产,从未因冻堵而关井停产。文中总结了5点优点,并提出了两点不足之处。     

用差分色谱法消除气测背景气及外源气干扰的可行性探讨

针对气测录井中外源气、二次循环气对油气显示层解释的干扰问题,该文提出了用差分色谱法来消除其影响,并就其概念和实现方法做了介绍;对差分色谱的测量条件及影响因素进行了分析,文章还列举了差分色谱的录井应用实例。在满足差分色谱测量条件的前提下,该方法有利于气测录井解释和油气水层评价,为气测录井半定量或定量解释提供一种方法和途径。