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Discovery of the low temperature phase barium metaborate (BBO) and its significance in the search for new type nonlinear optical materials

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Chinese Science Bulletin 1997年第15期42卷 1233-1240页

作者： Lu, JX Wu, XT Chen, CZ Liang, JK Cheng, WD Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences Fuzhou China

1 History of discovery of the low temperature phase barium metaborate （BBO）——an excel-lent new-type ultraviolet radiation frequency-doubling crystalline materialTHE first laser excitation in 1960 with ruby （α-Al2O3: Cr） as a laser crystal and the first dou-bling of frequency （347. 15 nm） in 1961 by irradiating quartz crystal （α-SiO2） with a 694. 3nm laser beam have laid the basis for the study of laser and nonlinear optical （NLO） crystals,

关键词： quasi-aromatic six-membered (B3O6)3- ring low-temperature phase barium metaborate (an excellent new-type non-linear optical crystalline material).

Growth and morphology of potassium sodium strontium barium niobate single crystal with large diameter

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Chinese Science Bulletin 1995年第18期40卷 1522-1526页

作者：宋永远孙友轩陈焕矗葛战勤 Institute of Crystal Materials. Shandong University. Jinan 250100. China Hebei Institute of Chemical Technology and Light Industry Shijiazhuang 050018 China

Potassim sodiam strontium barium niobate (K1-xNax)2m(Sr1-yBay)1-mNb2O6,abbreviatedas KNSBN crystal family is one of the best photorefractive materials which can currentlycarry out the cat self-pumped phase conjugation. In recent years in the photorefractivefield. this crystal is very attractive for researcher at home and abroad because it has

关键词： large diameter potassium sodium strontium barium niobate growth morphology.

Properties of composition sinter prepared from fibrous barium titanate and nanometer zirconia

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Journal of Harbin Institute of Technology(New Series) 2002年第2期9卷 193-195页

作者：李文旭姜兆华王福平 Dept. of Appl. Chem. Harbin Inst. of Technol. Harbin 150001 China

Fibrous Batium Titanate particles, 30 50 μm long, prepared by a hydrothermal reaction, and the monoclinic phase and nanometer Zirconia, 11.6 nm long were prepared by citric acid reaction respectively. Then, the two were composite sintered to produce a new functional material by making full use of crystal axis orientation of fibers and the activity of nanometer powder. The analydid of composition and microstructure of the new material in terms of XRD and SEM. shows that the solid solution was formed between fibers and nanometer powder, and the distance between lattice (d value) of barium Titanate changed. But the crystal axis orientations of fibers remain unchanged.

关键词： fibrous barium Titanate nanometer Zirconia distance between lattice orientation

CRYSTAL GROWTH AND PHOTOREFRACTIVE PROPERTIES OF Cu-DOPED POTASSIUM SODIUM STRONTIUM barium NIOBATE

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Chinese Science Bulletin 1991年第8期36卷 637-640页

作者：姜全忠陈焕矗宋永远孙大亮许克彬徐海英余有龙袁洋 Institute of Crystal Materials Shandong University Jinan 250100 PRC Department of Applied Physics Harbin Institute of Technology Harbin 150006 PRC

With the progress of research on the applications of photorefractive (PR)effect in recent years, people paid more and more attention to the PR materials, especially to the modification of their properties, in order to... 详细信息

关键词： potassium sodium strontimn barium niobate photorefractive effect crystal growth.

A NEW Ba-W DISPENSER CATHODE IMPREGNATED WITH barium YTTERBATE

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Journal of Electronics(China) 1989年第2期6卷 189-193页

作者：王永树王奇李美仙邓耀德 Institute of Electronics Academia SinicaBeijing

A new kind of Ba-W dispenser cathode impregnated with barium ytterbate has been *** has good properties;high coefficient of secondary emission,strong ability of resisting oxygenpoisoning,high thermionic emission current density and more uniform emission on the cathode *** cathode is suitable for using as an electron emitter for microwave tubes,especially magnetrons.

关键词： Thermionic cathode Ba-W dispenser cathode barium ytterbate Ba-W dispenser cathode

Experimental investigation of barium spectra in crossed electric and magnetic fields

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Chinese Physics B 2007年第12期16卷 3642-3646页

作者：全威刘红平沈礼詹明生 State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics Wuhan Institute of Physics and Mathematics Chinese Academy of Sciences Wuhan 430071 China Center for Cold Atom Physics Chinese Academy of Sciences Wuhan 430071 China Graduate School of Chinese Academy of Sciences Beijing 100080 China

This paper has studied the barium spectra in external magnetic and electric fields on the recently-built system based on a super-conducting solenoid with high stability of better than 1 Gauss. Firstly, we compared the spectra in a high pure magnetic field of B = 4.00000 T for different polarized laser, σ^＋ and σ^-. We prove that after a proper shift, the σ^＋ and σ^- spectra are completely identical. We also investigated the dependence of the spectral feature in the high magnetic field on an additionally applied crossing electric field. Along with the increase of the electric field. there is an energy shift for every spectral line. Based on a transformative Hamiltonian, we explained this energy shift well.

关键词： crossed fields Rydberg barium

NON-DESTRUCTIVE MEASUREMENTS OF LEAD AND barium IN ARCHAEOLOGICAL BONE SAMPLES USING XRF

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Nuclear Science and Techniques 1991年第1期2卷 48-52页

作者：黄士斌 Ulf Nilsson Sren Mattsson Institute of Nuclear Medicine Shanghai Medical University Shanghai 200032 China Department of Radiation Physics University of LundMalmo General HospitalS-214 01 MalmoSweden

The lead and barium contents in sixteen archaeological bone samples from 10 persons buried in Dalsby, Sweden, were determined by means of X- ray fluorescence analysis using two "Co sources for excitation and a planar Ge detector for registration of the X- rays. The lead concentrations were found to be less than 168μ g/g, and the barium concentrations were in the range of 15- 97μg/g.

关键词： X- ray fluorescence analysis Lead barium Archaeological bone

barium Hydroxide Octahydrate (Ba(OH)2·8H2O) as a Substitute Alternative for barium Carbonate (BaCO3) in Synthesis Superconductor of Nd1Ba2Cu3O7-δPhase

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Journal of Materials Science and Chemical Engineering 2018年第7期6卷 117-124页

作者： M. Sumadiyasa I. B. S. Manuaba P. Suardana Department of Physics Faculty of Mathematics and Natural Sciences Udayana University Badung Bali Indonesia

One of the basic ingredients in conventional preparation of cuprates-based superconducting materials such as the Nd-Ba-Cu-O superconducting system, especially the Nd1Ba2Cu3O7-δ phase is barium Carbonate (BaCO3). It has the potential to produce the carbon dioxide (CO2) air pollutant. Therefore it is necessary to look for other materials as the source of Ba atom which does not produce CO2 gas. In this research has been successfully made the Nd1Ba2Cu3O7-δ phase with the barium Hydroxide Octahydrate (Ba(OH)2·8H2O) as a source of Ba atom. The results of the characterization XRD has been shown the main peaks of the Nd1Ba2Cu3O7-δ phase. Refinement of the XRD data by using Rietica software, obtained the value of GofF (Goodness of Fit) = 1.7023 and lattice parameter a ≈ b < c/3 with a value of c/3 = 3.9275 A.

关键词： Nd1Ba2Cu3O7-δ Phase Ba Atom barium Carbonate barium Hydroxide Octahydrate GofF

barium appendicitis: A single institution review in Japan

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World Journal of Gastrointestinal Surgery 2016年第9期8卷 651-655页

作者： Hideki Katagiri Alan Kawarai Lefor Tadao Kubota Ken Mizokami Department of Surgery Tokyo Bay Urayasu Ichikawa Medical Center Department of Surgery Jichi Medical University

AIM To review clinical experience with barium appendicitis at a single *** A retrospective review of patients admitted with a diagnosis of acute appendicitis, from January 1, 2013 to December 31, 2015 was performed. Age, gender, computed tomography(CT) scan findings if available, past history of barium studies, pathology, and the presence of perforation or the development of complications were reviewed. If the CT scan revealed high density material in the appendix, the maximum CT scan radiodensity of the material is measured in Hounsfield units(HU). barium appendicitis is defined as:(1) patients diagnosed with acute appendicitis;(2) the patient has a history of a prior barium study; and(3) the CT scan shows high density material in the appendix. Patients who meet all three criteria are considered to have barium *** In total, 396 patients were admitted with the diagnosis of acute appendicitis in the study period. Of these, 12 patients(3.0%) met the definition of barium appendicitis. Of these 12 patients, the median CT scan radiodensity of material in the appendix was 10000.8 HU, ranging from 3066 to 23423 HU(± 6288.2). In contrast, the median CT scan radiodensity of fecaliths in the appendix, excluding patients with barium appendicitis, was 393.1 HU, ranging from 98 to 2151 HU(± 382.0). The CT scan radiodensity of material in the appendices of patients with barium appendicitis wassignificantly higher than in patients with nonbarium fecaliths(P barium appendicitis is not rare in Japan. Measurement of the CT scan radiodensity of material in the appendix may differentiate barium appendicitis from routine appendicitis.

关键词： Acute appendicitis barium appendicitis barium sulfate Upper gastrointestinal imaging Gastric cancer screening